MXPA98007668A - Procedure for the manufacture of solid foam materials of polyurethane with expandi hydrocarbons - Google Patents
Procedure for the manufacture of solid foam materials of polyurethane with expandi hydrocarbonsInfo
- Publication number
- MXPA98007668A MXPA98007668A MXPA/A/1998/007668A MX9807668A MXPA98007668A MX PA98007668 A MXPA98007668 A MX PA98007668A MX 9807668 A MX9807668 A MX 9807668A MX PA98007668 A MXPA98007668 A MX PA98007668A
- Authority
- MX
- Mexico
- Prior art keywords
- weight
- initiated
- propylene oxide
- polyether
- molecular weight
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000008259 solid foam Substances 0.000 title claims abstract description 5
- 229930195733 hydrocarbon Natural products 0.000 title description 3
- 150000002430 hydrocarbons Chemical class 0.000 title description 2
- 229920002635 polyurethane Polymers 0.000 title 1
- 239000004814 polyurethane Substances 0.000 title 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims abstract description 39
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229920000570 polyether Polymers 0.000 claims abstract description 28
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 21
- 229920005862 polyol Polymers 0.000 claims abstract description 15
- 150000003077 polyols Chemical class 0.000 claims abstract description 15
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 11
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 11
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims abstract description 9
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims abstract description 9
- 229930006000 Sucrose Natural products 0.000 claims abstract description 9
- 239000005720 sucrose Substances 0.000 claims abstract description 9
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 8
- 125000003118 aryl group Chemical group 0.000 claims abstract description 8
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- QWTDNUCVQCZILF-UHFFFAOYSA-N iso-pentane Natural products CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000012948 isocyanate Substances 0.000 claims abstract description 4
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims abstract description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 3
- 150000001412 amines Chemical class 0.000 claims description 4
- 239000002671 adjuvant Substances 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 239000004604 Blowing Agent Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 150000004982 aromatic amines Chemical class 0.000 abstract description 2
- 239000004202 carbamide Substances 0.000 abstract 1
- 239000003380 propellant Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 14
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 10
- 238000009472 formulation Methods 0.000 description 9
- 239000006260 foam Substances 0.000 description 7
- 239000003381 stabilizer Substances 0.000 description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 5
- 238000005187 foaming Methods 0.000 description 5
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 5
- FZQMJOOSLXFQSU-UHFFFAOYSA-N 3-[3,5-bis[3-(dimethylamino)propyl]-1,3,5-triazinan-1-yl]-n,n-dimethylpropan-1-amine Chemical compound CN(C)CCCN1CN(CCCN(C)C)CN(CCCN(C)C)C1 FZQMJOOSLXFQSU-UHFFFAOYSA-N 0.000 description 4
- 239000012190 activator Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000006261 foam material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical group CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- -1 acyclic pentanes Chemical class 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000000855 fungicidal effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000005684 Liebig rearrangement reaction Methods 0.000 description 1
- 125000002015 acyclic group Chemical group 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001335 aliphatic alkanes 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
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical group NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- VPKDCDLSJZCGKE-UHFFFAOYSA-N carbodiimide group Chemical group N=C=N VPKDCDLSJZCGKE-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000004872 foam stabilizing agent Substances 0.000 description 1
- DYDNPESBYVVLBO-UHFFFAOYSA-N formanilide Chemical compound O=CNC1=CC=CC=C1 DYDNPESBYVVLBO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- DATIMHCCPUZBTD-UHFFFAOYSA-N pentane Chemical class CCCCC.CCCCC DATIMHCCPUZBTD-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
Abstract
A process for the manufacture of solid foam materials consisting of urethane groups and optionally urea and isocyanurate is described, characterized in that a solid polyurethane foam is prepared by the reaction of (a) an aromatic polyisocyanate with (b) a component of polyol with an average of at least three hydrogen atoms reactive towards the isocyanate, containing (1) 30 to 80% by weight of a polyether initiated with aromatic amine with a molecular weight of 300 to 800 based on 70 to 100% by weight weight of 1,2-propylene oxide and 0 to 30% by weight of ethylene oxide; (2) 10 to 40% by weight of a polyether essentially initiated with sucrose with a molecular weight of 400 to 1000 based on 70 to 100% in weight of 1,2-propylene oxide and 0 to 30% in weight of ethylene oxide; (3) 5 to 30% in weight of a polyether initiated with propylene glycol with a molecular weight of 500 to 1500 based on 70 to 100% by weight 1,2-propylene oxide and 0 to 30% by weight of ethylene oxide; (4) n- and / or i-pentane as a propellant agent, (5) water, (6) optionally auxiliaries and additives, totaling the percentage by weight of the components (1), (2) and (3) on the
Description
•
1 PROCEDURE FOR THE MANUFACTURE OF SOLID POLYURETHANE FOAM MATERIALS WITH EXPANDED HYDROCARBONS
It is known to expand solid polyurethane foam materials with low boiling point alkanes. It is advantageous to use cyclic alkanes here, which contribute excellently to the thermal conductivity of the foam material due to its low thermal conductivity. gas form. Cyclopentane is preferably used here. 10 The good properties in the application as insulating material for refrigerated furniture are diminished by the negative commercial aspects. Due to the solvent properties of cyclopentane, it is necessary to use a certain quality of the inner container of
polystyrene. Due to its relatively high boiling point of 49 ° C, cyclopentane also has the drawback of condensing at low temperatures - which are usual in the application of rigid polyurethane foam as
insulating material in refrigerated furniture. Due to the undesired condensation of the expansive agent a depression is generated in the cell, which has to be compensated, in turn, with a greater stiffness of the foam or with a higher apparent density. In comparison with the homologous, acyclic pentane-n-pentane and i-pentane compounds, cyclopentane has REF. 28300 higher manufacturing costs. Systems expanded by n-pentane or i-pentane have been known for quite some time for solid polyurethane foam materials. However, the greatest thermal conductivity in the form of a gas is disadvantageous, which results in a worse thermal insulation capacity of the correspondingly foamed systems. In addition, the solubility of n-pentane and i-pentane in polyols is clearly worse than in the case of cyclopentane, which has a negative effect on the production safety and on the adhesion of the foamed material in covering layers. The aim of the present invention was to develop a rigid expanded spongy material with n-pentane or c-pentane, in which the drawbacks indicated above are overcome. It has surprisingly been found that the formulations of polyols based on aromatic amines, sucrose and propylene glycol provided spongy materials of good adhesion and with a low coefficient of thermal conductivity. The solubility of the acyclic pentanes fulfilled all the requirements.
The object of the present invention is, therefore, a process for the manufacture of solid foam materials having urethane groups and, optionally, isocyanurate groups, characterized in that a rigid polyurethane foam is produced by transforming a ) aromatic polyisocyanate with b) a polyol component, having as a mean value at least 3 hydrogen atoms reactive with isocyanates, said component 1) containing from 30 to 80% by weight of an aromatic polyether, initiated with amine, of a molecular weight of 300 to 700, based on 70 to 100% by weight of 1,2-propylene oxide and 0 to 30% by weight of ethylene oxide 2) from 10 to 40% by weight of a polyether initiated fundamentally with sucrose, of a molecular weight of 400 to 1,000, based on 70 to 100% by weight of 1,2-propylene oxide and from 0 to 30
% by weight of ethylene oxide 3) from 5 to 30% by weight of a polyether initiated with propylene glycol, of a molecular weight of 500 to 1,500, based on 70 to 100% by weight of 1,2-propylene oxide and from 0 to 30% by weight of ethylene oxide 4) n-pentane and / or i-pentane as expanding agent 5) water 6) optionally, adjuvants and additives, totaling the weight% of the components 1), ) and 3) 100%.
The aromatic polyethers, initiated with amine, are preferably understood to be those based on o-toluylenediamine. This initiator reacts preferably with 1,2-propylene oxide. The molecular weights of these polyethers are preferably between 300 and 800, particularly preferably between 500 and 600. In polyol formulations, the proportion of amine aromatic polyethers is preferably between 30 and 80% by weight, particularly preferably between 35 and 70% by weight. The sucrose-initiated polyethers are preferably produced by reaction with 1,2-propylene oxide, optionally diethylene glycol, ethylene glycol or propylene glycol are used as co-initiator in amounts of 10 to 30% by weight. The molecular weights are preferably between 400 and 1,000, particularly preferably between 500 and 600. In the polyol formulations, the proportion of the polyethers initiated with sucrose is preferably between 10 and 40% by weight, in particular preferable between 15 and 35% by weight. Polyethers initiated with propylene glycol are also manufactured by reaction with 1,2-propylene oxide. Preferably, polyethers with a molecular weight between 500 and 1500 are used, particularly preferably between 900 and 1100. In the polyol formulations, their part is preferably between 5 and 30% by weight, particularly preferably between 15 and 25% by weight. By using polyol formulations according to the invention, expanded foam materials could be manufactured by n-pentane and i-pentane with a low coefficient of thermal conductivity and good adhesion in covering layers. As co-expansive, the polyol formulations contain between 0.5 and 3.5% by weight of water, preferably between 1.5 and 2.5% by weight. All the known starting components can be used as polyisocyanates according to the process according to the invention. As the isocyanate component, for example, aromatic polyisocyanates, as described, eg, can be used. Siefken in Justus Liebigs, Annals of Chemistry, 562, pages 75 to 136, for example those of the formula Q (NC0) n, where n means 2 to 4, preferably 2, and Q means an aliphatic hydrocarbon radical with 2 to 18, preferably with 6 to 10, C atoms, a cycloaliphatic hydrocarbon radical with 4 to 15, preferably with 5 to 10, C atoms, an aromatic hydrocarbon radical with 8 to 15, preferably with 8 to 13, C atoms , eg those polyisocyanates which are described in DE-OS 2 832 253, pages 10 to 11. Polyisocyanates of easy technical access, for example 2,4- and 2-diisocyanate, are particularly preferable. , 6-toluylene, as well as mixtures of any type of these isomers ("TDI"), polyphenylenepolymethylene polyisocyanates, as prepared by the condensation of aniline-formaldehyde and subsequent phosgenation ("crude MDI") and polyisocyanates having carbodiimide groups, Urethane groups, Alfanate groups, group s isocyanurate, urea groups or biuret groups ("modified polyisocyanates"), in particular modified polyisocyanates derived from 2,4- and 2,6-tolylene diisocyanate or 4,4'- and / or 2,4 'diisocyanate. -diphenylmethane. You can use paraffins or fatty alcohols or dimethyl polysiloxanes, as well as pigments or dyes, in addition stabilizers against influences of aging or weathering, plasticizers and substances with fungicidal and bactericidal action, as well as fillers, such as barium sulfate, earth of infusoria, charcoal or washed chalk. Other examples of surfactant additives and foam stabilizers, as well as cellular regulators, reaction retarders, stabilizers, anti-flammable substances, dyes and fillers, as well as substances with fungicidal and bactericidal action to be used, if necessary, according to the invention, as well as as details about the use and effect of these additives are described in the Handbook of Plastics, Volume VII, edited by Vieweg and Höchtlen, Carl-Hanser-Verlag, Munich 1966, eg on pages 121 to 205. the manufacture of the foam, the foaming can be carried out according to the invention also in closed molds. For it, the reactive mixture is introduced into a mold. Metal, eg aluminum, or plastic, eg epoxy resin, can be used as the mold material. In the mold, the reactive mixture of expandable foam forms the molded body. The foaming in mold can be carried out in such a way that the molded part presents on its surface a cellular structure. However, it can also be performed in such a way that the molded part has a compact surface and a cellular core. In the first case, the process according to the invention is carried out in such a way that a quantity of expandable reactive mixture is introduced into the mold such that the spongy material formed just fills the mold. In the latter case, we proceed in such a way that an amount of expandable reactive mixture greater than that which would be necessary to fill the interior of the mold with spongy material is introduced into the mold. In the latter case we work with "overcharging", a procedure of this type is known, for example from documents US-PS 3 178 490 and 3 182 104. Another object of the invention is the use of rigid spongy material manufactured according to the invention as an intermediate layer for composite elements and for foaming hollow spaces in the construction of refrigerated furniture.
The process according to the invention is preferably used for foaming hollow spaces of refrigerators and freezers. Of course, the foamed materials can also be produced by block foaming or by the known principle of the double conveyor belt. The solid foam materials obtained according to the invention are used, for example, in the construction, as well as for the insulation of tubes for heat transport and containers. The following examples are included to explain the invention, without limiting it in scope.
Example 1 (comparison example) Formulation for rigid polyurethane foam Component A: 75 parts by weight polyether initiated with sucrose (80% by weight), propylene glycol (20% by weight) of a molecular weight of 600 based on the oxide of propylene 25 parts by weight of polyether initiated with propylene glycol of a molecular weight of 1,000 based on 1,2-propylene oxide 2.5 parts by weight of water 2.0 parts by weight of foam stabilizer B 8423 (Goldschmidt Fa 2.0 parts by weight Desmorapid 726b activator (Bayer AG) Component B 128 parts by weight of crude MDI (NCO content = 31.5% by weight) '100 parts by weight of component A were mixed with parts by weight of n-pentane and 128 parts by weight of component B by means of an agitator (1,000 rpm) at 20CC, being compacted in a closed mold until reaching 34 kg / m3.
Example 2 (comparison example) Component A: 50 parts by weight of polyether initiated with octyl ethylene diamine with a molecular weight of 560 based on 1,2-propylene oxide 50 parts by weight of polyether initiated with sucrose (80% by weight) weight) and propylene glycol (20% by weight) of a molecular weight of 600 based on the 1,2-propylene oxide 2.5 parts by weight of water 2.0 parts by weight of foam stabilizer B 8423 (Fa. Goldschmidt) 2.0 parts by weight Desmorapid 726b activator (Bayer AG) Component B 141 parts by weight of crude MDI (NCO content = 31.5% by weight) 100 parts by weight of component A were mixed with 11 parts by weight of n-pentane and 141 parts by weight of component B by means of an agitator (1,000 rpm) at 20 ° C, being compacted in a closed mold until reaching 34 kg / m 3.
Example 3 (comparison example) Component A: 75 parts by weight of polyether initiated with octyl ethylene diamine with a molecular weight of 560 based on 1,2-propylene oxide 25 parts by weight of polyether initiated with propylene glycol of a molecular weight of 1,000 based on the 1,2-propylene oxide 2.5 parts by weight of water 2.0 parts by weight of foam stabilizer B 8423 (Fa.Goldschmidt) 2.0 parts by weight of Desmorapid 726b activator (Fa Bayer AG) Component B 115 parts by weight of crude MDI (NCO content = 31.5% by weight) 100 parts by weight of component A were mixed with 11 parts by weight of n-pentane and 115 parts by weight of the component B by means of an agitator (1,000 rpm) at 20 ° C, being compacted in a closed mold until reaching 34 kg / m3.
EXAMPLE 4 (according to the invention) Component A: 50 parts by weight of polyether initiated with toluenediamine of a molecular weight of 560 based on 1,2-propylene oxide 30 parts by weight of polyether initiated with sucrose (80% by weight) weight) propylene glycol (20% by weight) of a molecular weight of 600 based on the 1,2-propylene oxide 20 parts by weight of polyether initiated with propylene glycol of a molecular weight of 1,000 based on 1,2-propylene oxide 2.5 parts by weight of water 2.0 parts by weight of foam stabilizer B 8423 (Goldschmidt Fa) 2.0 parts by weight Desmorapid 726b activator (Bayer AG) Component B 124 parts by weight of MDI crude (NCO content = 31.5% by weight) 100 parts by weight of component A were mixed with 11 parts by weight of n-pentane and 124 parts by weight of component B by an agitator (1,000 rpm) at 20 ° C , being compacted in a closed mold until reaching 34 kg / m3. Results From the sponge material plates manufactured in Examples 1 to 4, the test values given in the table were obtained.
As the tests show, only the foam material of example 4 according to the invention shows good to very good properties with respect to the thermal conductivity coefficient, the compressive strength, the sheet adhesion and the pentane solubility of the polyol formulation. The comparison example 1 provides spongy materials with a high coefficient of thermal conductivity. In addition, the solubility of pentane in the polyol is not sufficient. The spongy materials manufactured in the comparison example 2 exhibit insufficient adhesion in the sheet; the solubility of pentane is in the limit margin. Comparative Example 3 provides spongy materials with good adhesion and good pentane solubility of the polyol formulation; but insufficient resistance to compression. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:
Claims (4)
1. Process for the manufacture of solid foam materials having urethane groups and, if appropriate, urea groups and isocyanurate groups, characterized in that a solid polyurethane foam material is manufactured by transforming a) aromatic polyisocyanate with b) a component of polyol, which has as an average value at least 3 hydrogen atoms reactive with isocyanates, said component 1) containing from 30 to 80% by weight of an aromatic polyether, initiated with amine, having a molecular weight of 300 to 800, base to 70 to 100% by weight of 1,2-propylene oxide and from 0 to 30% by weight of ethylene oxide 2) from 10 to 40% by weight of a polyether initiated primarily with sucrose, of a molecular weight from 400 to 1,000, based on 70 to 100% by weight of 1,2-propylene oxide and 0 to 30% by weight of ethylene oxide 3) from 5 to 30% by weight of a polyether initiated with propylene glycol, of a molecular weight of 500 to 1,500, based on 70 to 100% by weight of 1,2-propylene oxide and 0 to 30% by weight of ethylene oxide 4) n-pentane and / or i-pentane as blowing agent 5) water 6) optionally- , adjuvants and additives, totaling the% by weight of the components 1), 2) and 3) 100%.
2. Process according to claim 1, characterized in that an aromatic polyether initiated with amine based on o-toluylenediamine is used. Method according to claim 1, characterized in that a polyol component with 50 to 60% by weight of the polyether initiated with o-toluylenediamine of a molecular weight of 450 to 650 based on 1,2-propylene oxide is used. . Process according to claim 1, characterized in that a polyol component with 10 to 25% by weight of a polyether initiated with propylene glycol of a molecular weight of 800 to 1,200 based on the 1,2-propylene oxide is used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19611367.9 | 1996-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA98007668A true MXPA98007668A (en) | 1999-04-27 |
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