CN108068561B - 空腔降噪轮胎 - Google Patents
空腔降噪轮胎 Download PDFInfo
- Publication number
- CN108068561B CN108068561B CN201711123059.XA CN201711123059A CN108068561B CN 108068561 B CN108068561 B CN 108068561B CN 201711123059 A CN201711123059 A CN 201711123059A CN 108068561 B CN108068561 B CN 108068561B
- Authority
- CN
- China
- Prior art keywords
- benzotriazole
- hydroxy
- phthalate
- chemical formula
- methyl
- 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.)
- Expired - Fee Related
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- -1 alkoxy silane Chemical compound 0.000 claims abstract description 24
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- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 16
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 claims description 12
- MQHNKCZKNAJROC-UHFFFAOYSA-N dipropyl phthalate Chemical compound CCCOC(=O)C1=CC=CC=C1C(=O)OCCC MQHNKCZKNAJROC-UHFFFAOYSA-N 0.000 claims description 12
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- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 7
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Abstract
本发明涉及一种空腔降噪轮胎,其包括:涂布于内衬层内侧的粘合剂层;以及粘附于所述粘合剂层上的吸音材料层。所述粘合剂层包括:两端含有烷氧基硅烷的聚醚;以及苯并噻唑类紫外线吸收剂。本发明的空腔降噪轮胎,性能稳定,即使在行驶时发热及变形的情况下吸音材料也不会脱离。
Description
技术领域
本发明涉及一种稳定的空腔降噪轮胎。即,本发明含有弹性及粘合强度得到增强的粘合剂组合物,从而可以确保即使在行驶时发热及变形的情况下吸音材料也不会脱离。
背景技术
关于汽车噪声,随着政府规制的加强及电动汽车需求的扩大,要求降低轮胎产生的噪声呈现一种逐渐增加的趋势。但是,最近的研发动向表明,轮胎接触路面的胎面部采用宽幅结构且相当于轮胎侧面的胎侧(Side wall)的扁平比低的UHP(超高性能;Ultra highperformance)轮胎倍受青睐。这种轮胎由于其结构特性使得胎侧的刚性增加,因此轮胎本身结构不能对从路面传递的冲击发挥适当的阻尼(Damping)作用,从而导致使与诱发噪声相关的声压上升的结果。这就会使轮胎内部(Cavity)产生空气振动,然后噪声会传输至车辆内部,并让驾驶员感知到所述噪声,从而成为降低行驶时乘车感受的原因(以下将由空气振动产生的噪声统称为“共鸣噪声”)。
作为降低共鸣噪声的现有技术,可以例举一种利用具有开孔(open cell)的聚氨酯材质发泡体的技术。但是,为了使这种聚氨酯材质的发泡体粘附于轮胎内侧的内衬层(inner liner)上,如果使用普通的液态粘合剂,粘合剂就会被吸收至吸音材料层,从而导致吸音能力及粘结力显著降低。
如果不使用液态粘合剂而使用通过光或热使其硬化的粘合剂(JP 2015-166134A),也会出现一些问题。即,虽然初期粘结力会比较优秀,但是如弹性的应力较差,导致在受车辆荷重影响而使轮胎变形的状态下,无法经受进一步施加的反复变形与振动而被破坏,从而发生吸音材料剥离或脱离的问题。
如果使用丁基类热熔粘合剂,在轮胎变形的情况下会充分延伸,从而能够缓解外部冲击。但是,热熔性粘合剂的特性决定了温度越升高其粘度就越低,流动性增加,从而行驶时粘附于轮胎内的吸音材料位置就会改变,从而会对轮胎平衡或均匀性产生不良影响。
虽然有使用硅胶系列粘合剂的专利,但是其强度较差,经受轮胎大变形影响的特性比较脆弱。
因此,为了解决粘合剂存在的上述问题,同时为了将用于降低轮胎的共鸣噪声的吸音材料粘合到内衬层上,就需要使用能够经受轮胎变形与发热的特殊粘合剂。
在先技术文献
专利文献
日本公开专利第2015-166134号
发明内容
所要解决的技术问题
本发明的一个目的在于,提供一种轮胎,用持久力强的粘合剂粘附吸音材料,以确保能够降低轮胎的噪声中由轮胎内部的空气振动产生的共鸣噪声。
本发明的另一个目的在于,提供一种轮胎,使用还含有紫外线吸收剂的粘合剂,以确保能够预防臭氧老化。
本发明的另一个目的在于,提供一种轮胎,即,用持久力强的粘合剂组合物粘附吸音材料,以确保即使受行驶时轮胎的温度变化、汽车荷重与外部冲击影响而发生变形的情况下吸音材料也不会剥离或者脱离,一直保持轮胎的空腔降噪性能,直至达到轮胎磨耗寿命为止。
解决技术问题的方法
本发明提供的空腔降噪轮胎,包括:涂布于内衬层内侧的粘合剂层;以及粘附于所述粘合剂层上的吸音材料层。所述粘合剂层包括:两末端含有烷氧基硅烷的聚醚;以及苯并三唑类紫外线吸收剂。
所述苯并三唑类紫外线吸收剂可以是从由2-(2’-羟基-5'-t-辛基苯基)苯并三唑、2-(2’-羟基-5'-甲基苯基)苯并三唑、2-(2’-羟基-3',5'-二叔丁基苯基)-5-氯代苯并三唑、2-(2’-羟基-3'-t-丁基-5'-甲基苯基)-5-氯代苯并三唑、2-(2’-羟基-3',5'-二叔戊基苯基)-5-氯代苯并三唑、2-(2’-羟基-3',5'-t-丁基苯基)苯并三唑、2-(2-羟基-4-辛基羟苯基)-2H-苯并三唑、2-(2-羟基-5-甲基苯基)-2H-苯并三唑、5-氯代-2-(3,5-二叔丁基-2-羟基苯基)-2H-苯并三唑、2-(3-t-丁基-2-羟基-5-甲基苯基)-5-氯代-2H-苯并三唑、2-(3,5-二叔戊基-2-羟基苯基)-2H-苯并三唑、2-(3,5-二叔丁基-2-羟基苯基)-2H-苯并三唑、2-(2-羟基-5-t-辛基苯基)-2H-苯并三唑、2-[2’-羟基-3'-(3”,4”,5”,6”-四氢邻苯二甲酰亚胺-甲基)-5'-甲基苯基]苯并三唑、2-(2’-羟基-3',5'-二叔戊基苯基)苯并三唑、2-(2-羟基-3-十二烷基-5-甲基苯基)苯并三唑、2-[2-羟基-3,5-双(α,α-二甲基苄基)苯基]-2H-苯并三唑、2-(2H-苯并三唑-2-基)-4-甲基-6-(3,4,5,6-四氢邻苯二甲酰亚胺基甲基)苯酚及甲基-3-[3-t-丁基-5-(2H-苯并三唑-2-基)-4-羟基苯基]丙酸酯与聚乙二醇的缩合物构成的组中选择的任意一种。
相对两末端含有烷氧基硅烷的聚醚100重量份,所述苯并三唑类紫外线吸收剂的含量为1至5重量份。
相对所述两末端含有烷氧基硅烷的聚醚100重量份,所述粘合剂层还包括50至70重量份的增塑剂。
所述增塑剂是从由邻苯二甲酸二异十一烷酯(Di-iso-undecyl phthalate)、邻苯二甲酸二辛酯(DEHP,Di-ethylhexyl phthalate)、邻苯二甲酸二己酯(DHP,Di-hexylphthalate)、邻苯二甲酸丁苄酯(BBP,Butyl benzyl phthalate)、邻苯二甲酸二丙酯(DprP,Di-propyl phthalate)、邻苯二甲酸二正丁酯(DBP,Di-n-butyl phthalate)、邻苯二甲酸二环己酯(DCHP,Dicyclohexyl phthalate)、邻苯二甲酸二正苯酯(DPP,Di-n-phenyl phthalate)、邻苯二甲酸二乙酯(DEP,Diethyl phthalate)、邻苯二甲酸二异壬酯(DINP,Di-iso-nonyl phthalate)、邻苯二甲酸二正辛酯(DNOP,Di-n-octyl phthalate)、邻苯二甲酸二异癸酯(DIDP,Di-iso-decyl phthalate)、邻苯二甲酸二甲酯(DMP,Dimethylphthalate)及邻苯二甲酸一乙基己基酯(MEHP,Monoethylhexylphthalate)构成的组中选择的任意一种。
所述两末端包含烷氧基硅烷的聚醚可以用下述化学式1表示。
[化学式1]
其中,R1至R3分别是独立的碳数量为1至3的烷基或烷氧基,n为10至1,000的整数。
所述醚重复单元可以是下述化学式2表示的氧化丙烯(oxypropylene)重复单元。
[化学式2]
所述烷氧基硅烷可以是单烷氧基硅烷、双烷氧基硅烷、三烷氧基硅烷,所述烷氧基硅烷可以是从由甲氧基硅烷、乙氧基硅烷及丙氧基硅烷构成的组中选择的任意一种。
所述化学式1可以用下述化学式1a表示。
[化学式1a]
所述两末端包含烷氧基硅烷的聚醚还包含下述化学式3表示的尿烷重复单元。
[化学式3]
所述吸音材料层包含聚氨酯泡沫。
发明效果
依据本发明的轮胎,用持久力强的粘合剂粘附吸音材料,从而能够降低轮胎的噪声中由轮胎内部的空气振动产生的共鸣噪声。
依据本发明的轮胎,使用了还包含紫外线吸收剂的粘合剂,从而能够预防臭氧老化。
附图说明
图1是依据本发明一个实现例的充气轮胎的侧剖视图。
附图标记说明
1:充气轮胎
2:粘合剂层
3:吸音材料层
具体实施方式
下面,将对本发明进行更加详细的说明。
依据本发明一个实施例的空腔降噪轮胎包括:涂布于内衬层内侧的粘合剂层;以及粘附于所述粘合剂层上的吸音材料层。所述粘合剂层包括:两端含有烷氧基硅烷的聚醚;以及紫外线吸收剂。
图1表示了依据本发明一个实施例的充气轮胎的侧剖面图。参照图1可知,依据本发明的充气轮胎1包括:涂布于内衬层内侧面的粘合剂层2;粘附于所述粘合剂层2上的吸音材料层3。
所述粘合剂层2包括:两末端包含烷氧基硅烷的聚醚;以及紫外线吸收剂。
一般来说,粘合剂吸收紫外线后会生成自由基。所述自由基在材料内经过光氧化、增殖等过程并且通过游离基再结合而发生链终止。因此,粘合剂就会产生裂纹(Crack)、起泡(Blistering)、分离(Delamination)等问题。这些问题成为导致降低产品寿命的原因。紫外线吸收剂的紫外线吸收能力强,能够抑制聚合物自由基(polymer radical)的产生,从而可以有效地解决上述问题。
所述紫外线吸收剂包含分子内含有从第1级氨基、第2级氨基、羟基、苯基、羧基及巯基构成的组中选择的任意一种官能基的化合物。
具体讲,所述紫外线吸收剂可以优选使用苯并三唑类紫外线吸收剂,该苯并三唑类紫外线吸收剂在分子内含有从第1级氨基、第2级氨基、羟基、苯基、羧基及巯基构成的组中选择的任意一种官能基,最优选为含有羟基及苯基的苯并三唑类紫外线吸收剂。包含含有所述羟基及苯基的苯并三唑类紫外线吸收剂的粘合剂层2具有即使在臭氧老化条件下也能够保持粘合剂物性的特征。
轮胎可能发生臭氧裂纹,该臭氧裂纹为产生由汽车行驶时产生的臭氧引起的老化(产生裂缝或者裂痕)现象。臭氧在汽车的尾气与阳光(紫外线)发生反应时产生,本发明的粘合剂层2中含有的紫外线吸收剂将紫外线吸收后,就会减少臭氧产生量,可预测由此可以预防臭氧导致的老化。
特别是,含有所述羟基及苯基的苯并三唑类紫外线吸收剂,其吸收紫外线的波长范围较宽,吸收程度大,因此其性能比较优秀。
具体讲,含有所述羟基及苯基的苯并三唑类紫外线吸收剂可以是从由2-(2’-羟基-5'-t-辛基苯基)苯并三唑、2-(2’-羟基-5'-甲基苯基)苯并三唑、2-(2’-羟基-3',5'-二叔丁基苯基)-5-氯代苯并三氮唑、2-(2’-羟基-3'-t-丁基-5'-甲基苯基)-5-氯代苯并三氮唑、2-(2’-羟基-3',5'-二叔戊基苯基)-5-氯代苯并三氮唑、2-(2’-羟基-3',5'-t-丁基苯基)苯并三唑、2-(2-羟基-4-辛基羟苯基)-2H-苯并三唑、2-(2-羟基-5-甲基苯基)-2H-苯并三唑、5-氯代-2-(3,5-二叔丁基-2-羟基苯基)-2H-苯并三唑、2-(3-t-丁基-2-羟基-5-甲基苯基)-5-氯代-2H-苯并三唑、2-(3,5-二叔戊基-2-羟基苯基)-2H-苯并三唑、2-(3,5-二-叔丁基-2-羟基苯基)-2H-苯并三唑、2-(2-羟基-5-t-辛基苯基)-2H-苯并三唑、2-[2’-羟基-3'-(3”,4”,5”,6”-四氢邻苯二甲酰亚胺-甲基)-5'-甲基苯基]苯并三唑、2-(2’-羟基-3',5'-二叔戊基苯基)苯并三唑、2-(2-羟基-3-十二烷基-5-甲基苯基)苯并三唑、2-[2-羟基-3,5-双(α,α-二甲基苄基)苯基]-2H-苯并三唑、2-(2H-苯并三唑-2-基)-4-甲基-6-(3,4,5,6-四氢邻苯二甲酰亚胺基甲基)苯酚及甲基-3-[3-t-丁基-5-(2H-苯并三唑-2-基)-4-羟基苯基]丙酸酯与聚乙二醇的缩合物构成的组中选择的任意一种。
相对所述两端含有烷氧基硅烷的聚醚100重量份,所述紫外线吸收剂的含量为1至5重量份。
如果所述紫外线吸收剂低于1重量份,则无法抑制因吸收紫外线而产生游离基,因此会发生裂纹、起泡(Blistering)、分离(Delamination)等问题。如果所述紫外线吸收剂含量超过5重量份,则会降低粘合剂层2的粘结力。
除了上述成分之外,所述粘合剂层2还可以有选择性地包括1种单独的添加剂或者2种以上添加剂的混合,添加剂通常为改善粘合剂的物理特性而使用,该添加剂包括增塑剂、脱水剂、粘合促进剂及硬化促进剂等。
如上所述,如果粘合剂层2中还含有紫外线吸收剂,则制造轮胎时在常温下硬化粘合剂层的步骤中,与空气中的水分(H2O)反应而发生聚合反应或产生水解,从而使硬化速度变得非常慢。如果粘合剂层的硬化延迟,轮胎的工艺流程就会延迟,由此导致生产效率降低。
所述粘合剂层2可以通过增加增塑剂的含量而解决上述问题。依据本发明包含两端含有烷氧基硅烷的聚醚及苯并三唑类紫外线吸收剂的粘合剂层2,即使增加所述增塑剂的含量,也能够保持其物性,从而可以解决硬化速度及生产效率下降的问题。
相对两端含有烷氧基硅烷的聚醚100重量份,所述增塑剂的含量为50至70重量份。
如果所述增塑剂低于50重量份,则混合时就不能适当进行填充剂的混合,导致分散变差,从而会使粘合剂的整体物性出现问题。如果增塑剂含量超过70重量份,则由于含有大量低分子量材料,因此强度就会下降,从而导致粘结力发生问题。
虽然所述增塑剂可以是环氧基类、聚酯类、苯甲酸盐类或柠檬酸类增塑剂。但是,优选的增塑剂为邻苯二甲酸酯类增塑剂。具体讲,增塑剂可以从由双异十一烷基邻苯二甲酸酯(Di-iso-undecyl phthalate)、邻苯二甲酸二辛酯(DEHP,Di-ethylhexylphthalate)、邻苯二甲酸二己酯(DHP,Di-hexylphthalate)、邻苯二甲酸丁苄酯(BBP,Butylbenzyl phthalate)、邻苯二甲酸二丙酯(DprP,Di-propyl phthalate)、邻苯二甲酸二正丁酯(DBP,Di-n-butyl phthalate)、邻苯二甲酸二环己酯(DCHP,Dicyclohexyl phthalate)、邻苯二甲酸二正苯酯(DPP,Di-n-phenyl phthalate)、邻苯二甲酸二乙酯(DEP,Diethylphthalate)、邻苯二甲酸二异壬酯(DINP,Di-iso-nonyl phthalate)、邻苯二甲酸二正辛酯(DNOP,Di-n-octyl phthalate)、邻苯二甲酸二异癸酯(DIDP,Di-iso-decyl phthalate)、邻苯二甲酸二甲酯(DMP,Dimethyl phthalate)及单乙基己基邻苯二甲酸酯(MEHP,Monoethylhexylphthalate)构成的组中选择。
所述粘合促进剂可以使用氨基硅烷,所述氨基硅烷可以从由n-2-氨基乙基-3-氨丙基三乙氧基硅烷、氨丙基三乙氧基硅烷、氨丙基三甲氧基硅烷、双-三甲氧基硅基丙基)胺、N-苯基-氨丙基三甲氧基硅烷、三氨基功能性三甲氧基硅烷、氨丙基甲基二乙氧基硅烷、甲基丙烯酰氧基丙基三甲氧基硅烷、甲基氨丙基三甲氧基硅烷、缩水甘油醚氧基(glycidoxy)丙基乙基二甲氧基硅烷、缩水甘油醚氧基丙基三甲氧基硅烷、缩水甘油醚氧基乙基三甲氧基硅烷、(3,4-环氧环己基)丙基三甲氧基硅烷、(3,4-环氧环己基)乙基甲基二甲氧基硅烷、异氰酸基丙基三乙氧基硅烷、异氰酸基丙基甲基二甲氧基硅烷、氰基乙基三甲氧基硅烷、丙烯酰氧基丙基三甲氧基硅烷、甲基丙烯酰氧基丙基甲基二甲氧基硅烷、4-氨基-3,3-二甲基丁基三甲氧基硅烷及n-乙基-3-三甲氧基硅基-2-甲基丙胺构成的组中选择。
相对两端含有烷氧基硅烷的聚醚100重量份,所述粘合促进剂的含量为5至7重量份。
如果所述粘合促进剂低于5重量份,则其与被贴物(吸音材料层3)之间的粘合就会出现问题。如果粘合促进剂含量超过7重量份,则虽然初期粘合强度能够提高,但是热老化等情况下的粘结力就会显著降低。
所述硬化促进剂可以使用含锡化合物,所述含锡化合物可以从由二月桂酸二丁基锡、二乙酸二丁基锡、二丁基二甲氧基锡、辛酸锡、三蜡酸异丁锡、二丁基氧化锡、可溶性二丁基氧化锡、二邻苯二甲酸二异辛酯二丁基锡、双-三丙氧基硅基二辛基锡、二乙酰丙酮二丁基锡、硅基化二丁基二氧化锡、三辛二酸甲酯基苯基锡、三蜡酸异丁基锡、二丁酸二甲基锡、二新癸酸二甲基锡、酒石酸三乙基锡、二苯甲酸二丁基锡、油酸锡、环烷酸锡、2-乙基己基己酸三丁基锡(butyltin tri-2-ethylhexyl hexoate)、丁酸锡及双-二酮二有机锡构成的组中选择。
与其它金属类硬化促进剂相比,所述硬化促进剂对人体的安全度更高,催化性能及热稳定性优秀。主要用作使硅类粘合剂在常温条件下硬化的催化剂,相对两末端包含烷氧基硅烷的聚醚100重量份,硬化促进剂含量为1至3重量份。
如果所述硬化促进剂低于1重量份,硬化速度慢,工艺中就会发生被贴物剥离的问题。如果硬化促进剂含量超过3重量份,就会促进凝胶化,从而导致基本的物性及粘结力出现问题。
所述脱水剂可以从由四丙氧基硅烷(tetrapropyl orthosilcate)、甲基三甲氧基硅烷(methyltrimethoxy silane)及乙烯基三甲氧基硅烷(vinyltrimethoxy silane)构成的组中选择。
所述脱水剂的分子结构内具有显示可水解性及置换性能的结合,交联时会提高交联率,同时通过水解会对提高置换力产生影响。另外,所述脱水剂通过硅烷偶联反应会对粘合剂层2的结合力产生影响。
相对两端含有烷氧基硅烷的聚醚100重量份,所述脱水剂的含量为1至5重量份。
如果所述脱水剂低于1重量份,就会降低脱水反应,导致硅烷偶联结合不足,从而使与二氧化硅的结合力下降。如果脱水剂含量超过5重量份,则没能结合的低分子量物质就会停留在内部,从而导致物性下降。
所述粘合剂层2包含的两端含有烷氧基硅烷的聚醚可以用下述化学式1表示。
[化学式1]
R1至R3分别是单独的碳数量为1至3的烷基或烷氧基,n为10至1,000的整数。
所述醚重复单元为下述化学式2表示的氧化丙烯(oxypropylene)。
[化学式2]
所述化学式1表示的聚合物,在其两末端包含烷氧基硅烷作为官能基,可以构成聚合物间的交联结构,因此能够提高粘合强度。
所述烷氧基硅烷可以是单烷氧基硅烷、或双烷氧基硅烷、或三烷氧基硅烷。
所述烷氧基硅烷包含碳数量为1至3的烷氧基。优选地,烷氧基硅烷可以是从由甲氧基硅烷、乙氧基硅烷及丙氧基硅烷构成的组中选择的任意一种。具体讲,烷氧基硅烷可以是从由甲基二甲氧基硅烷、甲基二乙氧基硅烷、甲基二丙氧基硅烷、甲基二丁氧基硅烷、乙基二甲氧基硅烷、乙基二乙氧基硅烷、乙基二丙氧基硅烷、乙基二丁氧基硅烷、丙基二甲氧基硅烷、丙基二乙氧基硅烷、丙基二丙氧基硅烷、丙基二丁氧基硅烷、丁基二甲氧基硅烷、丁基二乙氧基硅烷、丁基二丙氧基硅烷、丁基二丁氧基硅烷、二甲基甲氧基硅烷、二甲基乙氧基硅烷、二甲基丙氧基硅烷、二甲基丁氧基硅烷、二乙基甲氧基硅烷、二乙基乙氧基硅烷、二乙基丙氧基硅烷、二乙基丁氧基硅烷、二丙基甲氧基硅烷、二丙基乙氧基硅烷、二丙基丙氧基硅烷、二丙基丁氧基硅烷、二丁基甲氧基硅烷、二丁基乙氧基硅烷、二丁基丙氧基硅烷、二丁基丁氧基硅烷、甲基乙基甲氧基硅烷、甲基丙基甲氧基硅烷、甲基丁基甲氧基硅烷、甲基乙基乙氧基硅烷、甲基丙基乙氧基硅烷、甲基丁基乙氧基硅烷、甲基乙基丙氧基硅烷、甲基丙基丙氧基硅烷、甲基丁基丙氧基硅烷、甲基乙基丁氧基硅烷、甲基丙基丁氧基硅烷、甲基丁基丁氧基硅烷、三甲氧基硅烷、三乙氧基硅烷及三丙氧基硅烷构成的组中选择的任意一种。
所述化学式1的重均分子量为1,000至30,000g/mol。
如果重均分子量低于1,000g/mol,则分子量较小,因此延伸率就会下降,从而导致抗拉物性降低。如果重均分子量超过30,000g/mol,则两末端结合基较少,因此交联密度就会下降,从而导致抗拉物性及结合力出现问题。
具体讲,所述化学式1可以是用下述化学式1a表示的物质。
[化学式1a]
R1至R3分别是单独的包含的碳数量为1至3的烷基或烷氧基,n为10至1,000的整数。
采用包含两端含有烷氧基硅烷的聚醚的粘合剂组合物,即使因受汽车荷重与外部冲击等影响而发生变性或者在行驶过程中发热的情况下,吸音材料也不会脱附、剥离或者脱落,能够一直保持空腔降噪性能,直至达到轮胎磨耗寿命为止。
所述两端含有烷氧基硅烷的聚醚,可进一步包含:下述化学式3表示的聚氨酯(urethane)重复单元。
[化学式3]
所述聚氨酯重复单元,可以是一个以上的聚氨酯重复单元与聚醚构成共聚物后包含在内的(无规共聚物;random copolymer)。
由于进一步包含聚氨酯重复单元,因此能够保持一定的弹力,同时还能够提高其强度,以确保能够经受外力。
优选地,所述吸音材料层3将聚氨酯泡沫作为吸音材料包含在内。
所述聚氨酯泡沫基本上可以通过使多异氰酸酯化合物(polyisocyanatecompound)与多羟基化合物(polyhydroxy compound)发生聚氨酯反应进行制造。
所述聚氨酯泡沫是指带有开孔(open cell)的聚氨酯系列吸音材料,密度为25至35kg/m3。
带有开孔的聚氨酯泡沫由于粘性低的粘合剂被聚氨酯泡沫过多吸收,因此很难与内衬层进行粘合。但是,硅粘合剂的粘性与弹性好,只向开孔表面吸收,因此粘结力不会下降,即使是在发生大变形的情况下,也能够确保粘合剂层的耐久性,因此适合用于粘合聚氨酯泡沫。
下面,将对本发明的实施例进行详细说明,以确保具有本发明所属技术领域一般知识的技术人员能够很容易地实施。但是,本发明可以通过多种不同的形态实现,并非仅限定于这里说明的实施例。
[制造例:粘合剂组合物的制造]
利用下述表1所示组成制造粘合剂组合物。
[表1]
(单位:重量份)
1)改性硅聚合物:聚氧丙烯甲氧基硅烷
2)紫外线吸收剂1:2-(2’-羟基-5’-甲基苯基)苯并三唑(2-(2′-hydroxy-5′-methylphenyl)benzotriazole)
3)紫外线吸收剂2:2-氰基-3,3-二苯基丙烯酸-2-乙己酯(2-Ethylhexyl2-cyano-3,3-diphenylacrylate)
[试验例1:粘结力评估]
将所述实施例及比较例中制造的粘合剂涂布于轮胎气密层上形成粘合剂层,然后再粘附吸音材料,从而制造出空腔降噪轮胎。对粘合剂层的物性进行了测定,其结果如表2所示。
[表2]
机械物性与老化物性以DIN53504为基准进行评估,粘结力以ASTM D1002为基准进行评估。
老化物性是按照臭氧氛围的老化条件在臭氧浓度为50pphm±5、100℃的烤箱中保管7天后进行测定。
一般粘结力是在常温(25℃)下硬化7天后进行测定,老化粘结力是在与所述老化条件相同的环境下老化后进行测定。
通过所述表2可以看出,对于不含紫外线吸收剂的比较例1来说,经过臭氧老化后,硬度提高了,粘合剂稍微得到了硬化。如果进一步硬化,粘合剂层就会失去弹性,由此脱附发生的可能性变大。
使用非苯并三唑类紫外线吸收剂的紫外线吸收剂(比较例2)的情况下,虽然其机械物性、臭氧老化物性及粘结力与比较例1相比均稍微有所提高,但是其上述性能与实施例1至4相比仍然偏低。
对于含有紫外线吸收剂的实施例1至4来说,即使在老化之后,其物性也不会发生大的变化。
特别是,对于实施例2的物性来说,其硬度与延伸率都表现出了适当的值,即使在老化后,也表现出了相当高的物性,由此推测增塑剂的含量保持在55至65重量份是最有效的时。
以上,对本发明的优选实施例进行了详细说明。但是,本发明的权利范围并非仅限定于此,本领域的技术人员利用以下权利要求书中定义的本发明基本概念实施的多种变形及改良形态也属于本发明的权利范围。
Claims (9)
1.一种空腔降噪轮胎,其特征在于,包括:
涂布于内衬层内侧的粘合剂层;以及
粘附于所述粘合剂层上的吸音材料层,
所述粘合剂层包括:两末端含有烷氧基硅烷的聚醚;含有羟基和苯基的苯并三唑类紫外线吸收剂;及增塑剂,
相对两末端含有烷氧基硅烷的聚醚100重量份,所述苯并三唑类紫外线吸收剂的含量为1至5重量份,所述增塑剂的含量为50至70重量 份。
2.根据权利要求1所述的空腔降噪轮胎,其特征在于,
所述苯并三唑类紫外线吸收剂是从由2-(2’-羟基-5'-t-辛基苯基)苯并三唑、2-(2’-羟基-5'-甲基苯基)苯并三唑、2-(2’-羟基-3',5'-二叔丁基苯基)-5-氯代苯并三唑、2-(2’-羟基-3'-t-丁基-5'-甲基苯基)-5-氯代苯并三唑、2-(2’-羟基-3',5'-二叔戊基苯基)-5-氯代苯并三唑、2-(2’-羟基-3',5'-t-丁基苯基)苯并三唑、2-(2-羟基-4-辛基羟苯基)-2H-苯并三唑、2-(2-羟基-5-甲基苯基)-2H-苯并三唑、5-氯代-2-(3,5-二-叔丁基-2-羟基苯基)-2H-苯并三唑、2-(3-t-丁基-2-羟基-5-甲基苯基)-5-氯代-2H-苯并三唑、2-(3,5-二叔戊基-2-羟基苯基)-2H-苯并三唑、2-(3,5-二-叔丁基-2-羟基苯基)-2H-苯并三唑、2-(2-羟基-5-t-辛基苯基)-2H-苯并三唑、2-[2’-羟基-3'-(3”,4”,5”,6”-四氢邻苯二甲酰亚胺-甲基)-5'-甲基苯基]苯并三唑、2-(2’-羟基-3',5'-二叔戊基苯基)苯并三唑、2-(2-羟基-3-十二烷基-5-甲基苯基)苯并三唑、2-[2-羟基-3,5-双(α,α-二甲基苄基)苯基]-2H-苯并三唑、2-(2H-苯并三唑-2-基)-4-甲基-6-(3,4,5,6-四氢邻苯二甲酰亚胺基甲基)苯酚及甲基-3-[3-t-丁基-5-(2H-苯并三唑-2- 基)-4-羟基苯基]丙酸酯与聚乙二醇的缩合物构成的组中选择的任意一种。
3.根据权利要求1所述的空腔降噪轮胎,其特征在于,
所述增塑剂是从由双异十一烷基邻苯二甲酸酯、邻苯二甲酸二辛酯、邻苯二甲酸二己酯、邻苯二甲酸丁苄酯、邻苯二甲酸二丙酯、邻苯二甲酸二正丁酯、邻苯二甲酸二环己酯、邻苯二甲酸二正苯酯、邻苯二甲酸二乙酯、邻苯二甲酸二异壬酯、邻苯二甲酸二正辛酯、邻苯二甲酸二异癸酯、邻苯二甲酸二甲酯及邻苯二甲酸一乙基己基酯构成的组中选择的任意一种。
4.根据权利要求1所述的空腔降噪轮胎,其特征在于,
所述两末端含有烷氧基硅烷的聚醚用下述化学式1表示,
[化学式1]
其中,
R1至R3分别是独立的碳数量为1至3的烷基或烷氧基,n为10至1,000的整数。
5.根据权利要求4所述的空腔降噪轮胎,其特征在于,
所述化学式1中含有的醚重复单元是下述化学式2表示的氧化丙烯重复单元,
[化学式2]
6.根据权利要求4所述的空腔降噪轮胎,其特征在于,
所述烷氧基硅烷是单烷氧基硅烷、双烷氧基硅烷、三烷氧基硅烷,
所述烷氧基硅烷是从由甲氧基硅烷、乙氧基硅烷及丙氧基硅烷构成的组中选择的任意一种。
7.根据权利要求4所述的空腔降噪轮胎,其特征在于,
所述化学式1用下述化学式1a表示,
[式1a]
8.根据权利要求4所述的空腔降噪轮胎,其特征在于,
所述两末端含有烷氧基硅烷的聚醚进一步包含下述化学式3表示的聚氨酯重复单元,
[化学式3]
9.根据权利要求1所述的空腔降噪轮胎,其特征在于,
所述吸音材料层包含聚氨酯泡沫。
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CN108068561A (zh) | 2018-05-25 |
EP3321108B1 (en) | 2019-05-15 |
US20180134933A1 (en) | 2018-05-17 |
KR20180058871A (ko) | 2018-06-04 |
JP6556806B2 (ja) | 2019-08-07 |
US10995249B2 (en) | 2021-05-04 |
KR101874705B1 (ko) | 2018-07-04 |
JP2018083617A (ja) | 2018-05-31 |
EP3321108A1 (en) | 2018-05-16 |
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