JPH02293316A - Magnesium hydroxide particle - Google Patents
Magnesium hydroxide particleInfo
- Publication number
- JPH02293316A JPH02293316A JP11258489A JP11258489A JPH02293316A JP H02293316 A JPH02293316 A JP H02293316A JP 11258489 A JP11258489 A JP 11258489A JP 11258489 A JP11258489 A JP 11258489A JP H02293316 A JPH02293316 A JP H02293316A
- Authority
- JP
- Japan
- Prior art keywords
- magnesium hydroxide
- hydroxide particles
- particles
- weight
- coating layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002245 particle Substances 0.000 title claims abstract description 111
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 title claims abstract description 88
- 239000000347 magnesium hydroxide Substances 0.000 title claims abstract description 88
- 229910001862 magnesium hydroxide Inorganic materials 0.000 title claims abstract description 88
- 239000011247 coating layer Substances 0.000 claims abstract description 39
- 229920001971 elastomer Polymers 0.000 claims description 43
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 28
- 229920005989 resin Polymers 0.000 abstract description 23
- 239000011347 resin Substances 0.000 abstract description 23
- 238000002156 mixing Methods 0.000 abstract description 11
- 229920003052 natural elastomer Polymers 0.000 abstract description 6
- 229920001194 natural rubber Polymers 0.000 abstract description 6
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 6
- 239000005061 synthetic rubber Substances 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract 2
- 239000003063 flame retardant Substances 0.000 description 28
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 27
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 26
- -1 alkyl sulfuric acid Chemical compound 0.000 description 18
- 239000011342 resin composition Substances 0.000 description 17
- 239000005060 rubber Substances 0.000 description 16
- 235000014113 dietary fatty acids Nutrition 0.000 description 13
- 239000000194 fatty acid Substances 0.000 description 13
- 229930195729 fatty acid Natural products 0.000 description 13
- 239000000203 mixture Substances 0.000 description 12
- 150000004665 fatty acids Chemical class 0.000 description 11
- 239000002994 raw material Substances 0.000 description 11
- 229910052783 alkali metal Inorganic materials 0.000 description 10
- 239000002002 slurry Substances 0.000 description 9
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 229920003048 styrene butadiene rubber Polymers 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- 239000004816 latex Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 244000043261 Hevea brasiliensis Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 4
- 239000002174 Styrene-butadiene Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920006173 natural rubber latex Polymers 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical class CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical class CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000005639 Lauric acid Chemical class 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Chemical class CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical class CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008117 stearic acid Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Fireproofing Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】 ［発明の分野］ 本発明は、水酸化マグネシウム粒子に関する。[Detailed description of the invention] [Field of invention] The present invention relates to magnesium hydroxide particles.
さらに詳しくは、本発明は、熱可塑性樹脂の充填剤、特
に難燃化剤として有利に使用される水゛酸化マグネシウ
ム粒子に関する。More particularly, the present invention relates to magnesium hydroxide particles which are advantageously used as fillers for thermoplastic resins, in particular as flame retardants.
［発明の背景］
従来から、熱可塑性樹脂に配合する難燃化剤として、水
酸化マグネシウムを使用することが知られている。上記
水酸化マグネシウム粒子を難燃化剤として配合して得ら
れる難燃性樹脂は、燃焼しても有害ガスあるいは腐食性
ガスを発生せず、分子中にハロゲン分子を有する難燃性
樹脂あるいはハロゲン渠難燃化剤を配合して得られる樹
脂に比較して安全であるので、電気部品、電線外被材お
よびケーブル外被材などの用途に広く用いられている。[Background of the Invention] Conventionally, it has been known to use magnesium hydroxide as a flame retardant added to thermoplastic resins. The flame-retardant resin obtained by blending the above magnesium hydroxide particles as a flame retardant does not generate harmful or corrosive gas even when burned, and is a flame-retardant resin that has halogen molecules in its molecules or halogen Because it is safer than resins obtained by blending conduit flame retardants, it is widely used in applications such as electrical parts, wire sheathing materials, and cable sheathing materials.
水酸化マグネシウム粒子を熱可塑性樹脂に配合して難燃
性を得るためには、該樹脂１００重量部に対して水酸化
マグネシウム粒子を例えば５０ｆｆｉ量部程度充填する
必要があり、さらに充分な難燃性を得るためには数重量
倍程度まで充填しなければならない。ところが、水酸化
マグネシウムは水酸基を有しており親水性であるので、
水酸化マグネシウム粒子は、有機高分子体である熱可塑
性樹脂に対する分散性が低く、該樹脂に上述の量にて充
填した場合には、樹詣の耐衝軍性、引張強伸度などの機
械的特性、および成形加工性（通常、メルトインデック
スで表わされる）が低下する傾向がある。In order to obtain flame retardancy by blending magnesium hydroxide particles into a thermoplastic resin, it is necessary to fill, for example, about 50 ffi parts of magnesium hydroxide particles to 100 parts by weight of the resin. In order to obtain the desired properties, it must be filled to several times its weight. However, since magnesium hydroxide has a hydroxyl group and is hydrophilic,
Magnesium hydroxide particles have low dispersibility in thermoplastic resin, which is an organic polymer, and when filled in the resin in the above amount, mechanical properties such as impact resistance, tensile strength and elongation of the tree properties and moldability (usually expressed as melt index) tend to decrease.
そこで、上述の水酸化マグネシウム粒子を難燃化剤とし
て配合して得られる難燃化熱可塑性樹詣の問題点を解決
するために、水酸化マグネシウムなど水酸基を有する金
属化合物の表面を界面活性剤で被覆（コーティング）す
ることが提案されている。たとえば、特開昭５２−３０
２６２号公報には、水酸化マグネシウム、塩基性炭酸マ
グネシウム、ハイドロタルサイト類似化合物など表面が
正に帯電している粉体の表面に、アルキル硫酸、アルキ
ルアリールスルホン酸、高級詣肪酸のアルカリ金属塩な
とア二オン系表面活性剤を化学吸着させてモノレイヤー
（単分子の薄層）を形成することにより上記の粉体表面
を親油性（疎水性）化する技術が開示されている。上記
公報の記載によれば、粉体表面を界面活性剤で親油性化
することにより、該粉体の熱可塑性樹詣に対する分散性
を改良することができるとされている。Therefore, in order to solve the problems of the flame-retardant thermoplastic resin obtained by blending the above-mentioned magnesium hydroxide particles as a flame retardant, the surface of a metal compound having a hydroxyl group such as magnesium hydroxide was treated with a surfactant. It has been proposed to coat it with For example, JP-A-52-30
No. 262 discloses that an alkali metal such as alkyl sulfuric acid, alkylaryl sulfonic acid, or higher fatty acid is added to the surface of a powder whose surface is positively charged, such as magnesium hydroxide, basic magnesium carbonate, or hydrotalcite-like compound. A technique has been disclosed for making the surface of the powder lipophilic (hydrophobic) by chemically adsorbing a salt and anionic surfactant to form a monolayer (a thin layer of single molecules). According to the above publication, it is said that by making the powder surface lipophilic with a surfactant, the dispersibility of the powder in thermoplastic resins can be improved.
しかしながら、本発明者の検討によれば、上記の方法に
より粉体の熱可塑性樹脂に対する分散性はある程度改良
できるものの、該粉体を配合した熱可塑性樹詣は成形加
工性が低減する傾向があることが判明した。熱可塑性樹
脂の成形加工性が低減すると、例えば押出成形によりケ
ーブル外被材を製造する際に、スクリュー負荷電流が上
昇するので押出成形速度を低下させざるを得す、製造コ
ストの上昇につながるという問題がある。However, according to the studies of the present inventor, although the dispersibility of the powder in the thermoplastic resin can be improved to some extent by the above method, the moldability of the thermoplastic resin blended with the powder tends to be reduced. It has been found. If the moldability of thermoplastic resin decreases, for example, when manufacturing cable jacket materials by extrusion molding, the screw load current will increase, forcing the extrusion molding speed to decrease, leading to an increase in manufacturing costs. There's a problem.
そこで、熱可塑性樹脂に大量に配合された場合に該樹脂
の成形加工性を低下させることのない、水酸化マグネシ
ウム粒子の開発が望まれる。Therefore, it is desired to develop magnesium hydroxide particles that do not reduce the moldability of thermoplastic resins when incorporated in large quantities.
［発明の目的］
本発明の目的は、配合された熱可塑性樹脂において良好
な成形加工性が得られる水酸化マグネシウム粒子を提供
することにある。[Object of the Invention] An object of the present invention is to provide magnesium hydroxide particles with which good moldability can be obtained in a blended thermoplastic resin.
［発明の要旨］
本発明者は、配合された熱可塑性樹脂の成形加工性を低
下させることのない水酸化マグネシウム難燃化剤につい
て、検討を重ねた。その結果、水酸化マグネシウム粒子
の表面にゴム状ポリマーを含む被覆層を形成し、該粒子
を熱可塑性樹詣に配合することによって、樹詣と水酸化
マグネシウム粒子との間の滑り性が改良され、良好な成
形加工性を有する樹脂が得られることを見出し、本発明
を完成させた。[Summary of the Invention] The present inventor has repeatedly studied a magnesium hydroxide flame retardant that does not reduce the molding processability of the blended thermoplastic resin. As a result, by forming a coating layer containing a rubbery polymer on the surface of magnesium hydroxide particles and blending the particles with thermoplastic resin, the slipperiness between the resin and the magnesium hydroxide particles was improved. They discovered that a resin with good molding processability could be obtained, and completed the present invention.
従って、本発明は、粒子表面にゴム状ポリマーを含む被
覆層を有することを特徴とする水酸化マグネシウム粒子
にある。Therefore, the present invention resides in magnesium hydroxide particles characterized by having a coating layer containing a rubbery polymer on the surface of the particles.
本発明の水酸化マグネシウム粒子の好ましい態様は以下
の通りである。Preferred embodiments of the magnesium hydroxide particles of the present invention are as follows.
（１）上記水酸化マグネシウム粒子が、平均粒子径が０
．２〜１０μｍの範囲にあり、ＢＥＴ比表面積が３０ｄ
／ｇ以下の粒子であること。(1) The above magnesium hydroxide particles have an average particle diameter of 0.
．． It is in the range of 2 to 10 μm, and the BET specific surface area is 30 d.
/g or less of particles.
（２）上記ゴム状ポリマーを含む被覆層が、水酸化マグ
ネシウム粒子表面に高級脂肪酸のアルカリ金属塩からな
る被覆層を介して形成されていること。(2) The coating layer containing the rubbery polymer is formed on the surface of the magnesium hydroxide particles via a coating layer made of an alkali metal salt of a higher fatty acid.
（３）上記ゴム状ポリマーが、天然ゴム、または合成ゴ
ムであること。(3) The rubbery polymer is natural rubber or synthetic rubber.
（４）上記ゴム状ポリマーを含む被覆層が、ゴム状ポリ
マー１００重量部に対して０．１重量部以上の量にてア
ルキルフェノール・ホルムアルデヒド樹詣を含むこと。(4) The coating layer containing the rubbery polymer contains an alkylphenol/formaldehyde tree in an amount of 0.1 parts by weight or more based on 100 parts by weight of the rubbery polymer.
（５）上記ゴム状ポリマーを含む被覆層が、ゴム状ポリ
マー１００重量部に対して０．１〜５０重量部の範囲に
てアルキルフェノール・ホルムアルデヒド樹脂を含むこ
と。(5) The coating layer containing the rubbery polymer contains an alkylphenol formaldehyde resin in an amount of 0.1 to 50 parts by weight based on 100 parts by weight of the rubbery polymer.
［発明の効果］
本発明の水酸化マグネシウム粒子は、ゴム状ポリマーを
含む被覆層を有するので、熱可塑性樹脂に配合した際に
、該粒子と樹脂との界面において良好な滑り性が得られ
る。従って、上記水酸化マグネシウム粒子を配合した熱
可塑性樹脂は、高いメルトインデックスを示し，良好な
成形加工性が得られる。[Effects of the Invention] Since the magnesium hydroxide particles of the present invention have a coating layer containing a rubbery polymer, when blended into a thermoplastic resin, good slipperiness can be obtained at the interface between the particles and the resin. Therefore, the thermoplastic resin blended with the magnesium hydroxide particles exhibits a high melt index and has good moldability.
さらに、上記水酸化マグネシウム粒子を配合した熱可塑
性樹詣は、従来公知の水酸化マグネシウム粒子を充填剤
として使用した熱可塑性樹脂と同等の難燃性、および機
械的特性が得られる。Furthermore, the thermoplastic resin blended with the magnesium hydroxide particles has flame retardancy and mechanical properties equivalent to those of conventional thermoplastic resins using magnesium hydroxide particles as a filler.
［発明の詳細な記述］
本発明の水酸化マグネシウム粒子は、粒子表面にゴム状
ポリマーを含む被覆層を有することを特徴とする。[Detailed Description of the Invention] The magnesium hydroxide particles of the present invention are characterized by having a coating layer containing a rubbery polymer on the particle surface.
上記粒子の原料として使用する水酸化マグネシウム粒子
に特に限定はないが、平均粒子径が０．２〜１０μｍの
範囲にあり、ＢＥＴ比表面積３０ｒｎ”／ｇ以下の粒子
であることが、樹脂に対する分散性、および該粒子を配
合した樹脂組成物の成形加工性あるいは機械的特性の点
で好ましい。There are no particular limitations on the magnesium hydroxide particles used as a raw material for the above particles, but particles with an average particle diameter in the range of 0.2 to 10 μm and a BET specific surface area of 30 rn”/g or less are required for dispersion in the resin. It is preferable in terms of properties, moldability or mechanical properties of a resin composition containing the particles.
上記原料として使用する水酸化マグネシウム粒子は、そ
の形状が厚みのある六角板状であって、ＢＥＴ比表面Ｈ
ｔ１０ゴ／ｇ以下、ブレーン比表面積５ｒｒ１″／ｇ以
下、嵩密度０．２〜０．６ｇ／ＣｒｒＩ３、および、吸
油量２５ 〜４０ｍｕ／１００ｇの範囲の粒子であるこ
とがさらに好ましい。The magnesium hydroxide particles used as the raw material have a thick hexagonal plate shape, and have a BET specific surface H
More preferably, the particles have a Blaine specific surface area of 5 rr1''/g or less, a bulk density of 0.2 to 0.6 g/CrrI3, and an oil absorption of 25 to 40 mu/100 g.
上記ゴム状ポリマーは、重量平均分子量が約５０００以
上の天然ゴム、合成ゴムから選ばれる少なくとも一種の
ゴム状ポリマーであることが好ましい。上記合成ゴムと
して、例えば、シスー１．４−ポリイソブレン、スチレ
ンーブタジェン共重合体、カルボキシ変性スチレンーブ
タジェン共重合体、カルボキシ変性アクリロニトリルー
ブタジエン共重合体およびエチレンープロピレン共重合
体などを挙げることができる。The rubbery polymer is preferably at least one type of rubbery polymer selected from natural rubber and synthetic rubber and having a weight average molecular weight of about 5,000 or more. Examples of the synthetic rubber include cis-1,4-polyisobrene, styrene-butadiene copolymer, carboxy-modified styrene-butadiene copolymer, carboxy-modified acrylonitrile-butadiene copolymer, and ethylene-propylene copolymer. be able to.
上記ゴム状ポリマーは、アルキルフェノール・ホルムア
ルデヒド樹脂を含んでいることが好ましい。上記アルキ
ルフェノール・ホルムアルデヒト樹脂は粘着性付与剤と
して作用するので、水酸化マグネシウム粒子に対する上
記ゴム状ポリマーの親和性を向上させる効果がある。上
記アルキルフェノール・ホルムアルデヒド樹脂の含有量
は、上記ゴム状ポリマー１００重量部に対して、通常は
０．１重量部以上、好ましくは０．１〜５０重量部、さ
らに好ましくは０．１〜１０重量部の範囲である。Preferably, the rubbery polymer contains an alkylphenol formaldehyde resin. Since the alkylphenol formaldehyde resin acts as a tackifier, it has the effect of improving the affinity of the rubbery polymer for magnesium hydroxide particles. The content of the alkylphenol formaldehyde resin is usually 0.1 parts by weight or more, preferably 0.1 to 50 parts by weight, and more preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the rubbery polymer. is within the range of
また、本発明の水酸化マグネシウム粒子は、上記ゴム状
ポリマーを含む被覆層が、水酸化マグネシウム粒子表面
に高級脂肪酸のアルカリ金属塩からなる被覆層を介して
形成されていることが好ましい。Further, in the magnesium hydroxide particles of the present invention, it is preferable that a coating layer containing the above-mentioned rubbery polymer is formed on the surface of the magnesium hydroxide particles via a coating layer made of an alkali metal salt of a higher fatty acid.
水酸化マグネシウム粒子は、前述のとおり親水性である
ので、上記原料となる水酸化マグネシウム粒子の表面に
高級詣肪酸のアルカリ金属塩からなる被覆層を形成する
ことによりその表面が疎水化され、該粒子表面とゴム状
ポリマーとの親和性が高くなるので、ゴム状ポリマーを
含む被覆層を有利に形成することができる。As mentioned above, the magnesium hydroxide particles are hydrophilic, so by forming a coating layer made of an alkali metal salt of a higher fatty acid on the surface of the magnesium hydroxide particles used as the raw material, the surface is made hydrophobic. Since the particle surface has a high affinity with the rubbery polymer, a coating layer containing the rubbery polymer can be advantageously formed.
上記高級詣肪酸のアルカリ金属塩としては、炭素数１０
〜１８の高級脂肪酸のナトリウム塩またはカリウム塩で
あることが好ましく、たとえば、オレイン酸、ステアリ
ン酸、パルミチン酸、およびラウリル酸などのナトリウ
ム塩またはカリウム塩を挙げることができる。上記高級
脂肪酸のアルカリ金属塩は単独で用いてもよく、二種以
上を混合してもよいが、ステアリン酸ナトリウムまたは
、オレイン酸ナトリウムを用いることが特に好ましい。The alkali metal salt of the higher fatty acid has a carbon number of 10
-18 higher fatty acids are preferred, and examples may include sodium or potassium salts of oleic acid, stearic acid, palmitic acid, and lauric acid. The above alkali metal salts of higher fatty acids may be used alone or in combination of two or more, but it is particularly preferable to use sodium stearate or sodium oleate.
上記高級詣肪酸のアルカリ金属塩からなる被覆層は、従
来公知の方法（例えば、特開昭５２−３０２６２号公報
参照）を用いて形成することができる。The coating layer made of the alkali metal salt of the higher fatty acid can be formed using a conventionally known method (for example, see JP-A-52-30262).
また、上述の原料となる水酸化マグネシウム粒子表面に
形成される高級脂肪酸のアルカリ金属塩からなる被覆層
は、高級脂肪酸のアルカリ金属塩の代りに、シランカッ
プリング剤、チタンカップリング剤、または、アルミカ
ップリング剤などからなる被覆層であってもよい。In addition, the coating layer made of an alkali metal salt of a higher fatty acid formed on the surface of the magnesium hydroxide particle serving as the raw material described above may be made of a silane coupling agent, a titanium coupling agent, or a It may also be a coating layer made of an aluminum coupling agent or the like.
本発明の水酸化マグネシウム粒子は、次に述べる方法に
より有利に製造することができる。The magnesium hydroxide particles of the present invention can be advantageously produced by the method described below.
まず、前記の原料となる水酸化マグネシウム粒子５〜７
０重晴％を含む水懸濁液（スラリー）を調製する。First, magnesium hydroxide particles 5 to 7, which are the raw materials mentioned above,
An aqueous suspension (slurry) containing 0 weight percent is prepared.
上記原料となる水酸化マグネシウム粒子の表面を疎水化
処理する場合には、たとえば、原料となる水酸化マグネ
シウム粒子１〜５０重量％を含むスラリーに前記高級脂
肪酸のアルカリ金属塩を粉末または水スラリーの形にて
、上記原料となる水酸化マグネシウム粒子１００重量部
に対して０．５〜１０重量部、好ましくは０．５〜５重
量部の割合で添加し、５０〜１００℃の温度範囲にて３
〜３００分攪拌した後、濾過、水洗することにより行な
うことができる。上述の疎水化処理（高級脂肪酸のアル
カリ金属塩からなる被覆層の形成）を行なった水酸化マ
グネシウム粒子は一旦乾燥したのち、前述の本発明の水
酸化マグネシウム粒子の原料として、５〜７０重量％の
スラリーとすることが好ましい。When the surface of the magnesium hydroxide particles used as the raw material is hydrophobized, for example, the alkali metal salt of the higher fatty acid is added to a slurry containing 1 to 50% by weight of the magnesium hydroxide particles used as the raw material as a powder or water slurry. It is added at a ratio of 0.5 to 10 parts by weight, preferably 0.5 to 5 parts by weight, per 100 parts by weight of magnesium hydroxide particles serving as the raw material, and heated in a temperature range of 50 to 100°C. 3
This can be carried out by stirring for ~300 minutes, followed by filtration and washing with water. The magnesium hydroxide particles subjected to the above-mentioned hydrophobization treatment (formation of a coating layer made of an alkali metal salt of higher fatty acid) are once dried, and then used as a raw material for the above-mentioned magnesium hydroxide particles of the present invention in an amount of 5 to 70% by weight. It is preferable to use a slurry of
次に、上述のスラリーに前記ゴム状ポリマーを、上記原
料となる水酸化マグネシウム粒子１００重量部に対して
、ゴム固形分として０．２〜１０重量部となる範囲にて
添加し、１〜３０分攪拌混合後、濾過、乾燥することに
より、表面にゴム状ポリマーを含む被覆層を有する水酸
化マグネシウム粒子が得られる。上記ゴムの添加量が、
ゴム固形分として０．２重量部未満の場合には上記水酸
化マグネシウム粒子を樹脂に配合した際に成形加工性を
充分に改良することができないことがあり、１０重量部
より多く添加しても成形加工性を改良する効果は向上し
ない。上述の製造方法によって得られる水酸化マグネシ
ウム粒子は、凝集状態にて得られることが多いので、上
記乾燥処理ののち、解砕することが好ましい。Next, the rubbery polymer was added to the slurry in an amount of 0.2 to 10 parts by weight as rubber solids based on 100 parts by weight of the magnesium hydroxide particles used as the raw material. After stirring and mixing for several minutes, the mixture is filtered and dried to obtain magnesium hydroxide particles having a coating layer containing a rubbery polymer on the surface. The amount of the above rubber added is
If the rubber solid content is less than 0.2 parts by weight, moldability may not be sufficiently improved when the magnesium hydroxide particles are blended with the resin, and even if more than 10 parts by weight is added. The effect of improving moldability does not improve. Since the magnesium hydroxide particles obtained by the above-mentioned production method are often obtained in an agglomerated state, it is preferable to crush them after the above-mentioned drying treatment.
上記ゴム状ポリマーは、ラテックスの形態であることが
好ましい。ゴム状ポリマーをラテックスの形態にて用い
ることにより、水酸化マグネシウム粒子表面に均一な被
覆層が形成され、熱可塑性樹脂に対する分散性に優れた
粒子が得られる。Preferably, the rubbery polymer is in the form of a latex. By using a rubbery polymer in the form of latex, a uniform coating layer is formed on the surface of the magnesium hydroxide particles, and particles with excellent dispersibility in thermoplastic resins can be obtained.
また、本発明の水酸化マグネシウム粒子は、原料となる
水酸化マグネシウム粒子をスラリーにすることなく、ト
ルエン、キシレン、クロロホルムなどの有機溶剤を媒体
としたゴム状ポリマー溶液と混合したのち、溶媒を減圧
乾燥、熱風乾燥など通常の方法で除去し、乾燥すること
によって製造してもよい。In addition, the magnesium hydroxide particles of the present invention can be produced by mixing the raw material magnesium hydroxide particles with a rubbery polymer solution using an organic solvent such as toluene, xylene, or chloroform as a medium, and then removing the solvent under reduced pressure. It may be produced by removing and drying by a conventional method such as drying or hot air drying.
上記ゴム状ポリマーのラテックスまたは、有機溶媒溶液
は、アルキルフェノール・ホルムアルデヒド樹脂をゴム
固形分に対して前述の範囲にて含んでいることが好まし
い。The latex or organic solvent solution of the rubbery polymer preferably contains an alkylphenol formaldehyde resin in the above-mentioned range based on the rubber solid content.
なお、上述のゴム状ポリマーを含む被覆層は、水酸化マ
グネシウム粒子の表面に有利に形成することができるが
、水酸化マグネシウム粒子以外に、水酸化アルミニウム
、塩基性炭酸マグネシウム、および、ハイドロタルサイ
トなどの一般に熱可塑性樹詣の充填剤として使用される
粒子であって、表面が正に帯電している粒子の表面に形
成することもできる。Note that the coating layer containing the above-mentioned rubbery polymer can be advantageously formed on the surface of the magnesium hydroxide particles, but in addition to the magnesium hydroxide particles, aluminum hydroxide, basic magnesium carbonate, and hydrotalcite can be formed on the surface of the magnesium hydroxide particles. It can also be formed on the surface of particles that are commonly used as fillers for thermoplastic resins, such as particles whose surfaces are positively charged.
本発明の水酸化マグネシウム粒子は、熱可塑性樹脂の充
填剤、特に難燃化剤として、難燃性樹脂組成物を製造す
る用途に有利に使用することができる。上記水酸化マグ
ネシウム粒子を難燃化剤として使用する場合には、熱可
塑性樹１指１００重量部に対して、上記粒子を通常５０
重量部以上、好ましくは５０〜３００重量部配合するこ
とが好ましい。The magnesium hydroxide particles of the present invention can be advantageously used as a filler for thermoplastic resins, particularly as a flame retardant, in the production of flame-retardant resin compositions. When using the above magnesium hydroxide particles as a flame retardant, usually 50 parts by weight of the above particles are added to 100 parts by weight of one finger of thermoplastic resin.
It is preferable to add at least 50 to 300 parts by weight, preferably 50 to 300 parts by weight.
上記水酸化マグネシウム粒子の配合量が、上記熱可塑性
樹脂１００重量部に対して５０重量％未満であるときに
は樹詣に対する難燃化効果が低く、また５００重量部を
こえる場合にはト記難燃性樹脂組成物の成形加工性およ
び機械的強伸度が不十分になる傾向がある。If the blending amount of the magnesium hydroxide particles is less than 50% by weight based on 100 parts by weight of the thermoplastic resin, the flame retardant effect on tree trunks will be low, and if it exceeds 500 parts by weight, the flame retardant effect will be low. The moldability and mechanical strength and elongation of the resin composition tend to be insufficient.
上記水酸化マグネシウムを配合する熱可塑性樹詣は，ポ
リオレフィン系樹脂であることが好ましく、ポリエチレ
ン、ボリブロビレン、および、各種エチレンコポリマー
、たとえば、エチレンーブテンコポリマー、エチレンー
ブロビレンコポリマー、エチレンーアクリル酸エチルコ
ポリマーエチレンー酢酸ビニルコポリマー、エチレンー
メタクリル酸メチルコポリマーなどを挙げることができ
る。上記の樹脂は、単独で用いてもよく、二種以−トを
混合して用いてもよい。The thermoplastic resin blended with magnesium hydroxide is preferably a polyolefin resin, such as polyethylene, polypropylene, and various ethylene copolymers, such as ethylene-butene copolymer, ethylene-propylene copolymer, and ethylene-ethyl acrylate. Copolymers include ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, and the like. The above resins may be used alone or in combination of two or more.
本発明の水酸化マグネシウム粒子は、その粒子表面にゴ
ム状ポリマーを含む被覆層を有するので、上記熱可塑性
樹脂に配合された際に、粒子と樹詣との界面において良
好な滑り性が得られ、加熱成形時に高いメルトインデッ
クスを示す。The magnesium hydroxide particles of the present invention have a coating layer containing a rubbery polymer on the surface of the particles, so when blended with the above thermoplastic resin, good slipperiness can be obtained at the interface between the particles and the resin. , exhibits a high melt index during thermoforming.
上記の難燃性樹脂組成物は、上記水酸化マグネシウム粒
子を萌記熱可塑性樹脂に前述の範囲の量にて配合し、バ
ンバリーミキサー ブラベンダーブラストグラフ、二軸
押出機、ロールなどの通常混練装置を用いて加熱溶融・
混練することにより、製造することができる。上記難燃
性樹脂組成物は、前記水酸化マグネシウム粒子の他に、
架橋剤、酸化防止剤、滑剤、軟化剤および分散剤など、
一般に熱可塑性樹脂組成物に使用される充填剤、添加剤
などを含んでいてもよい。The above flame-retardant resin composition is prepared by blending the magnesium hydroxide particles with the Moeki thermoplastic resin in the amount within the above-mentioned range. Heat and melt using
It can be manufactured by kneading. The flame retardant resin composition includes, in addition to the magnesium hydroxide particles,
crosslinking agents, antioxidants, lubricants, softeners and dispersants, etc.
It may also contain fillers, additives, etc. that are generally used in thermoplastic resin compositions.
次に、実施例および比較例を示す。Next, examples and comparative examples will be shown.
［実施例１］
平均粒子径１μｍ，ＢＥＴ比表面Ｍ６ｒｎ’／ｇの水酸
化マグネシウム粒子１．０ｋｇを含む水スラリ−２０１
を調製し、該スラリーにステアリン酸ナトリウム２０ｇ
を添加し、７０℃にて１時間攪拌した後、固形分を濾過
洗浄した。[Example 1] Water slurry 201 containing 1.0 kg of magnesium hydroxide particles with an average particle diameter of 1 μm and a BET specific surface of M6rn'/g
and add 20g of sodium stearate to the slurry.
After stirring at 70° C. for 1 hour, the solid content was filtered and washed.
次いで得られた粒子を再び全量５ｊＺのスラリーとし、
該スラリー中のステアリン酸ナリトウム処理水酸化マグ
ネシウム粒子に対し、ゴム固形分割合が５重量％となる
よう、天然ゴムラテックス（固形分６１重量％）を添加
し、１０分間攪拌混合後、１１０℃にて４８時間乾燥し
、解砕して、水酸化マグネシウム粒子を得た。上記粒子
は、粒子表面にステアリン酸ナトリウムからなる被覆層
を介して、天然ゴムからなる被覆層が形成されていた。Next, the obtained particles are again made into a slurry with a total amount of 5jZ,
Natural rubber latex (solid content 61% by weight) was added to the sodium stearate-treated magnesium hydroxide particles in the slurry so that the rubber solid content was 5% by weight, and after stirring and mixing for 10 minutes, the mixture was heated to 110°C. The mixture was dried for 48 hours and crushed to obtain magnesium hydroxide particles. In the above particles, a coating layer made of natural rubber was formed on the particle surface with a coating layer made of sodium stearate interposed therebetween.
上記水酸化マグネシウム粒子の組成、被覆ゴム重量分率
、および、みかけの平均被覆層厚さを第１表に示す。Table 1 shows the composition, coating rubber weight fraction, and apparent average coating layer thickness of the magnesium hydroxide particles.
被覆ゴム重量分率は、上記水酸化マグネシウム粒子の一
定量を１００℃にて３時間強熱した後の重量（強熱後の
重量）、および、別に上記水酸化マグネシウム粒子の一
定量をエタノールおよび塩酸で処理して水酸化マグネシ
ウムを溶解し、高級脂肪酸塩をエーテル抽出し、乾固し
て測定した脂肪酸塩吸着量から、次式に従って算出した
値である。The coating rubber weight fraction is the weight after igniting a certain amount of the above magnesium hydroxide particles at 100°C for 3 hours (weight after ignition), and separately, the weight after igniting a certain amount of the above magnesium hydroxide particles with ethanol and This is a value calculated according to the following formula from the amount of fatty acid salt adsorption measured by treating with hydrochloric acid to dissolve magnesium hydroxide, extracting the higher fatty acid salt with ether, and drying it.
被覆ゴム重量＝水酸化マグネシウム粒子重量−（強熱後
の重量Ｘ Ｍｇ （ＯＨ） ２の分子ｆｆｉ／ＭｇＯの
分子量＋脂肪酸塩吸着量）
被覆ゴム重量分率＝被覆ゴム重量／水酸化マグネシウム
粒子重量×１００
みかけの平均被覆層厚さは、上記被覆ゴム重量から次式
によって算出した値である。Weight of coated rubber = Weight of magnesium hydroxide particles - (Weight after ignition ×100 The apparent average coating layer thickness is a value calculated from the above coating rubber weight using the following formula.
みかけの平均被覆層厚さ＝被覆ゴム重量／（水酸化マグ
ネシウム粒子重量×ゴムの密度ＸＢＥＴ比表面Ｍ）
次に、ポリエチレン２５ｇ（住友化学工業■製、商品名
：エクセレンＶＬＩ ００、２２．０ｇと住友化学工業
■製、商品名：ボンダインＨＸ８２９０、３．０ｇとの
混合物）に、上記水酸化マグネシウム粒子３９．４ｇを
添加して、１７０℃に加熱されたブラベンダープラスト
グラフに投入し、回転数６０ｒｐｍにて１５分間混練し
、さらに１５０℃に加熱されたロールで５分間混練後、
シート状にし、１６０℃で加圧成形して、厚さ１ｍｍの
難燃性樹詣組成物シートを得た。Apparent average coating layer thickness = coating rubber weight / (magnesium hydroxide particle weight × rubber density 39.4 g of the above magnesium hydroxide particles were added to a mixture of 3.0 g of Bondine HX8290 (manufactured by Sumitomo Chemical Co., Ltd., trade name: Bondine HX8290), and the mixture was placed in a Brabender Plastograph heated to 170°C, and the number of rotations was adjusted. After kneading for 15 minutes at 60 rpm and further kneading for 5 minutes with a roll heated to 150°C,
It was formed into a sheet and pressure-molded at 160°C to obtain a flame-retardant tree composition sheet with a thickness of 1 mm.
−ト記難燃性樹脂組成物シートについて、メルトインデ
ックス（成形加工性の尺度）、引張強さ、伸び、および
酸素指数（難燃性の尺度）を測定した。結果を第２表に
示す。- Melt index (measure of moldability), tensile strength, elongation, and oxygen index (measure of flame retardancy) were measured for the flame-retardant resin composition sheet. The results are shown in Table 2.
［実施例２］
実施例１において、ステアリン酸ナトリウムのかわりに
オレイン酸ナトリウムを、天然ゴムラテックスのかわり
にスチレンーブタジエン共重合体（ＳＢＲ）ラテックス
（日本合成ゴム■製、商品名；ＪＳＲＯ５９８）を用い
た外は、実施例１と同様にして、粒子表面にオレイン酸
ナトリウムからなる被覆層を介して、ＳＢＲからなる被
覆層が形成された水酸化マグネシウム粒子を得た。上記
水酸化マグネシウム粒子の組成、被覆ゴム重量分率、お
よび、みかけの平均被覆層厚さを第１表に示す。[Example 2] In Example 1, sodium oleate was used instead of sodium stearate, and styrene-butadiene copolymer (SBR) latex (manufactured by Japan Synthetic Rubber ■, trade name: JSRO598) was used instead of natural rubber latex. Magnesium hydroxide particles were obtained in the same manner as in Example 1 except that a coating layer made of SBR was formed on the particle surface via a coating layer made of sodium oleate. Table 1 shows the composition, coating rubber weight fraction, and apparent average coating layer thickness of the magnesium hydroxide particles.
上記水酸化マグネシウム粒ｆを使用した外は、実施例１
と同様にして難燃性樹脂組成物シートを得た。上記難燃
性樹脂組成物シートについて、メルトインデックス、引
張強さ、伸び、および酸素指数を測定した。結果を第２
表に示す。Example 1 except that the above magnesium hydroxide particles f were used.
A flame-retardant resin composition sheet was obtained in the same manner as above. The melt index, tensile strength, elongation, and oxygen index of the flame-retardant resin composition sheet were measured. Second result
Shown in the table.
［実施例３］
実施例１において、天然ゴムラテックスのがわりにカル
ボキシ変性アクリロニトリルブタジェン共重合体（ＮＢ
Ｒ）ラテックス（日本合成ゴム■製、商品名； ＪＳＲ
Ｏ９ １ ０）を用い、ゴム固形分がステアリン酸ナト
リウム処理水酸化マグネシウム粒子に対して３重量％と
なるようにした外は、実施例１と同様にして、粒子表面
にステアリン酸ナトリウムからなる被覆層を介して、Ｎ
ＢＲかうなる被覆層が形成された水酸化マグネシウム粒
子を得た。上記水酸化マグネシウム粒子の組成、被覆ゴ
ム重量分率、および、みかけの平均被覆層厚さを第１表
に示す。[Example 3] In Example 1, carboxy-modified acrylonitrile butadiene copolymer (NB
R) Latex (manufactured by Japan Synthetic Rubber ■, product name: JSR
A coating made of sodium stearate was applied to the particle surface in the same manner as in Example 1, except that the rubber solid content was 3% by weight based on the sodium stearate-treated magnesium hydroxide particles. Through the layer, N
Magnesium hydroxide particles on which a BR coating layer was formed were obtained. Table 1 shows the composition, coating rubber weight fraction, and apparent average coating layer thickness of the magnesium hydroxide particles.
上記水酸化マグネシウム粒子を使用した外は、実施例１
と同様にして難燃性樹脂組成物シートを得た。上記難燃
性樹脂組成物シートについて、メルトインデックス、引
張強さ、伸び、および酸素指数を測定した。結果を第２
表に示す。Example 1 except that the above magnesium hydroxide particles were used.
A flame-retardant resin composition sheet was obtained in the same manner as above. The melt index, tensile strength, elongation, and oxygen index of the flame-retardant resin composition sheet were measured. Second result
Shown in the table.
［実施例４］
実施例１において、天然ゴムラテックス固形分１００重
量部に対し、アルキルフェノール・ホルムアルデヒド樹
脂（田岡化学工業■製、商品名；タッキロール１３０−
Ｇ）を１重量部添加した外は、実施例１と同様にして、
粒子表面にステアリン酸ナトリウムからなる被覆層を介
して、アルキルフェノール・ホルムアルデヒド樹脂を含
む天然ゴムからなる被覆層が形成された水酸化マグネシ
ウム粒子を得た。上記水酸化マグネシウム粒子の組成、
被覆ゴム重量分率、および、みかけの平均被覆層厚さを
第１表に示す。[Example 4] In Example 1, alkylphenol/formaldehyde resin (manufactured by Taoka Chemical Industry ■, trade name: Tackirol 130-) was added to 100 parts by weight of natural rubber latex solid content.
G) in the same manner as in Example 1 except that 1 part by weight was added,
Magnesium hydroxide particles were obtained in which a coating layer made of natural rubber containing an alkylphenol formaldehyde resin was formed on the particle surface via a coating layer made of sodium stearate. Composition of the above magnesium hydroxide particles,
Table 1 shows the coating rubber weight fraction and the apparent average coating layer thickness.
上記水酸化マグネシウム粒子を使用した外は、実施例ｌ
と同様にして難燃性樹脂組成物シートを得た。上記難燃
性樹脂組成物シートについて、メルトインデックス、引
張強さ、伸び、および酸素指数を測定した。結果を第２
表に示す。Example 1 except that the above magnesium hydroxide particles were used.
A flame-retardant resin composition sheet was obtained in the same manner as above. The melt index, tensile strength, elongation, and oxygen index of the flame-retardant resin composition sheet were measured. Second result
Shown in the table.
［比較例１コ
天然ゴムラテックスを用いなかった外は、実施例１と同
桂にして、ステアリン酸ナトリウムからなる被覆層を有
する水酸化マグネシウム粒子を得た。上記水酸化マグネ
シウム粒子の組成を第１表に示す。[Comparative Example 1] Magnesium hydroxide particles having a coating layer made of sodium stearate were obtained in the same manner as in Example 1, except that natural rubber latex was not used. The composition of the above magnesium hydroxide particles is shown in Table 1.
実施例１で使用したものと同じポリエチレン２５ｇに、
上記水酸化マグネシウム粒子３７．５ｇ ’ｒ ｔＡ加
した外は、実施例１と同様にして難燃性樹脂組成物シー
トを得た。上記難燃性樹脂組成物シートについて、メル
トインデックス、引張強さ、伸び、および酸素指数を測
定した。結果を第２表に示す。To 25 g of the same polyethylene used in Example 1,
A flame-retardant resin composition sheet was obtained in the same manner as in Example 1, except that 37.5 g of the magnesium hydroxide particles were added. The melt index, tensile strength, elongation, and oxygen index of the flame-retardant resin composition sheet were measured. The results are shown in Table 2.
［比較例２］
ＳＢＲラテックスを用いなかった外は、実施例２と同様
にして、オレイン酸ナトリウムからなる被覆層を有する
水酸化マグネシウム粒子を得た。[Comparative Example 2] Magnesium hydroxide particles having a coating layer made of sodium oleate were obtained in the same manner as in Example 2, except that SBR latex was not used.
上記水酸化マグネシウム粒子の組成を第１表に示す。The composition of the above magnesium hydroxide particles is shown in Table 1.
実施例１で使用したものと同じポリエチレン２５ｇに、
上記水酸化マグネシウム粒子３７．５ｇを添加した外は
、実施例１と同様にして難燃性樹脂組成物シートを得た
。上記難燃性樹脂組成物シートについて、メノレトイン
デックス、弓日長強さ、伸び、および酸素指数を測定し
た。結果を第２表に示す。To 25 g of the same polyethylene used in Example 1,
A flame-retardant resin composition sheet was obtained in the same manner as in Example 1, except that 37.5 g of the above magnesium hydroxide particles were added. Regarding the above-mentioned flame-retardant resin composition sheet, the menoret index, photoperiod strength, elongation, and oxygen index were measured. The results are shown in Table 2.
以下余白
水酸化マグネシウム
ステアリン 酸ナトリウム
オレイン酸ナトリウム
天然ゴム
ＳＢＲ
ＮＢＲ
フェノール 樹脂
第１表
！
ｌ
０．０５
被覆ゴム重量分
率（％） ４．７ ２．３
みかけの平均被
覆層厚さ（ｍμ）８．６ ４．２
２．５
４．８
４．６
８．８
フェノール樹脂：田岡化学■製、アルキルフェノール・
ホルムアルデヒド樹詣
第２表
によって、樹脂の成形加工性が改良されることが明らか
である。Below is the margin Magnesium Hydroxide Sodium Stearate Sodium Oleate Natural Rubber SBR NBR Phenol Resin Table 1! l 0.05 Covering rubber weight fraction (%) 4.7 2.3 Apparent average coating layer thickness (mμ) 8.6 4.2 2.5 4.8 4.6 8.8 Phenol resin: Taoka Chemically manufactured, alkylphenol,
It is clear from Table 2 of the formaldehyde index that the moldability of the resin is improved.
！
■
メルトインデックス
（ｇ／ＩＯｍｉｎ） ０．１４ ０，２１
０．１６ ０．１８ ０．０８ ０．０１弓Ｈ
長強さ! ■ Melt index (g/IOmin) 0.14 0,21
0.16 0.18 0.08 0.01 Bow H
long strength
Claims (1)
とを特徴とする水酸化マグネシウム粒子。1. Magnesium hydroxide particles characterized by having a coating layer containing a rubbery polymer on the particle surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1112584A JP2772671B2 (en) | 1989-05-01 | 1989-05-01 | Magnesium hydroxide particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1112584A JP2772671B2 (en) | 1989-05-01 | 1989-05-01 | Magnesium hydroxide particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02293316A true JPH02293316A (en) | 1990-12-04 |
| JP2772671B2 JP2772671B2 (en) | 1998-07-02 |
Family
ID=14590386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1112584A Expired - Lifetime JP2772671B2 (en) | 1989-05-01 | 1989-05-01 | Magnesium hydroxide particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2772671B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002234723A (en) * | 2001-02-05 | 2002-08-23 | Ube Material Industries Ltd | Magnesium hydroxide granular material and granular fertilizer containing magnesium hydroxide |
| WO2008062820A1 (en) * | 2006-11-21 | 2008-05-29 | Autonetworks Technologies, Ltd. | Flame retardant, flame retardant composition, insulated wire, wiring harness, and method for producing flame retardant composition |
| WO2010052977A1 (en) * | 2008-11-04 | 2010-05-14 | 株式会社オートネットワーク技術研究所 | Flame retardant, flame retardant composition, and insulated wire |
| WO2011096410A1 (en) * | 2010-02-03 | 2011-08-11 | 株式会社オートネットワーク技術研究所 | Fire retardant, fire retardant resin composition, and insulated electrical wire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4373039A (en) * | 1980-06-11 | 1983-02-08 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Elastomer coated fillers and composites thereof comprising at least 60% by wt. of a hydrated filler and an elastomer containing an acid substituent |
-
1989
- 1989-05-01 JP JP1112584A patent/JP2772671B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4373039A (en) * | 1980-06-11 | 1983-02-08 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Elastomer coated fillers and composites thereof comprising at least 60% by wt. of a hydrated filler and an elastomer containing an acid substituent |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002234723A (en) * | 2001-02-05 | 2002-08-23 | Ube Material Industries Ltd | Magnesium hydroxide granular material and granular fertilizer containing magnesium hydroxide |
| JP4625586B2 (en) * | 2001-02-05 | 2011-02-02 | 宇部マテリアルズ株式会社 | Magnesium hydroxide granular material and granular fertilizer containing magnesium hydroxide |
| WO2008062820A1 (en) * | 2006-11-21 | 2008-05-29 | Autonetworks Technologies, Ltd. | Flame retardant, flame retardant composition, insulated wire, wiring harness, and method for producing flame retardant composition |
| JPWO2008062820A1 (en) * | 2006-11-21 | 2010-03-04 | 株式会社オートネットワーク技術研究所 | Flame retardant, flame retardant composition, insulated wire, wire harness and method for producing flame retardant composition |
| US8933334B2 (en) | 2006-11-21 | 2015-01-13 | Autonetworks Technologies, Ltd. | Flame retardant, a flame-retardant composition, an insulated wire, a wiring harness, and a method for manufacturing the flame-retardant composition |
| DE112007002791B4 (en) * | 2006-11-21 | 2020-04-16 | Autonetworks Technologies, Ltd. | FLAME RETARDANT, FLAME RETARDANT COMPOSITION, METHOD FOR PRODUCING THE FLAME RETARDANT COMPOSITION, INSULATED WIRE AND HARNESS |
| WO2010052977A1 (en) * | 2008-11-04 | 2010-05-14 | 株式会社オートネットワーク技術研究所 | Flame retardant, flame retardant composition, and insulated wire |
| WO2011096410A1 (en) * | 2010-02-03 | 2011-08-11 | 株式会社オートネットワーク技術研究所 | Fire retardant, fire retardant resin composition, and insulated electrical wire |
| US8901233B2 (en) | 2010-02-03 | 2014-12-02 | Autonetworks Technologies, Ltd. | Flame retardant, flame-retardant resin composition, and insulated wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2772671B2 (en) | 1998-07-02 |
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