Shanghai Daoqin Plastics Co., Ltd.

         thermoplastic property elastomer SIS自1963 year 问世以 就引起 极 large 关注, it is styrene and 异戊二烯组 formed 三嵌段 copolymer.

         in is 彼此孤立 soft/flexible 橡胶链段, is hard plastics 链段, in room temperature lower tool has 硫化橡胶 property can, in high temperature lower also can property, tool has good elastic property and adhesion strong/high degree, low temperature resistance, resistant solvent understanding property good, solvent liquid viscosity low, solid fast and other advantages, therefore usually used for and SBS or other material made agent, main/primary used as hot melt adhesive and pressure 敏胶, use in medical, electrical insulation, packaging, and 掩蔽, 标志, bonding solid and composite/compounding bag 层间黏 combined and other.

        但 is, SIS极 property small, oil resistant property and resistant solvent agent property relatively 差, make its application scope to very large made. in high temperature lower as viscous agent or used for bonding 鞋, material and other property 基材时存 in many disadvantages: and property material bonding strong/high degree high, heat resistant property and weather resistance 差, especially is used as hot pressure 敏时, its soft low.

        SIS modified principle and methods

         currently about/regarding SIS hot pressure modified research main/primary in in 三 方面: is for SIS elastomer modified, in elastomer upper 引入极 property or 链段, separation 子 极 property, 包括: ring oxidation, grafting modified.

        第二 is for SIS pressure 敏胶进行 modified, main/primary through add other type type adhesion agent or additives adhesion agent surface force and property, from 而改进胶黏 agent and by viscous material between adhesion force; its through pressure 敏胶 组 separation modified;

        第三 is utilizing electronics or outer light lower, is SIS elastomer di fracture generate 自由基, rear separation inner, separation 子间以 and and its it polymer between polymerization, grafting, crosslinked and other process.

        1, ring oxidation modified

         due to polystyrene (PS) and poly 异戊二烯 belongs to non property material 质, and property material mixed solvent property and formed bonding agent property to made, for SIS modified, main/primary is in its upper 引入极 property 基团. will ring oxidation modified rear to ESIS按 most formulation formed pressure and modified SIS按 most formulation formed pressure 敏胶进行 property can comparison. table/sheet 明, ESIS pressure 敏胶 剥离 strong/high degree, viscous property, resistant aging property can ratio modified SIS pressure good.

        2, grafting modified

        SIS elastomer in in di 键, can through grafting increase adhesion agent viscous property, heat resistant property and adhesion property and other. using/adopting and polyolefin structure and surface property can versus mono and SIS进行 grafting.

         acrylic and acrylic ester type grafting

         currently inner for SIS and acrylic ester type grafting modified research, generally using/adopting solvent liquid grafting methods, methacrylic acid ester (MMA), methacrylic acid ester (BMA), acrylonitrile (AN), acrylic (MAH) is mono for SIS进行 modified. 实验测定结果 table/sheet in oxidation 苯甲酰(BPO) function lower MMA and BMA and its mixed combined material can has grafting SIS, reinforcement its property and flexibility property, and property material table/sheet bonding property can.

        丁基橡胶 modified

         due to SIS in poly 异戊二烯链段受 to oxygen, hot, light and other function easy fracture degradation and crosslinked, effect/influence pressure property can. 丁基橡胶 chemical saturated and degree low, add upper poly 异丁烯链 不 active property, make 丁基橡胶 heat resistant and resistant oxidation property can excellent its it general purpose 橡胶.

        3, SIS pressure modified

        SIS elastomer 本身没 has viscous property, need will it formed pressure 敏胶时, must add adhesion resin, soft agent, anti agent and its it additives.

        SIS pressure modified, main/primary has types modified methods, its is pressure 敏胶 组 formed or content, according to agent requirements selection different increase viscous resin, solvent agent and its additives or 各组份 content; its is blending modified, through add its it type type agent or additives increase system property, make mixed combined adhesion agent and property material bonding force increase large, this is currently is production property can bonding agent using/adopting methods.

        SIS pressure modified can significantly improve/increase and property material adhesion force, heat resistant property and weather resistance 也一定 improve/increase, this type of modified comparison 简便, equipment relatively simple, and elastomer modified versus ratio, raw materials and can consumption relatively low, combined company production meet/satisfy different property can requirements adhesion agent.

        4, outer light or electronics modified

        紫 outer light or electronics modified is in hot pressure coating rear, through short electronics or outer 照射, make SIS elastomer di fracture generate 自由基, rear polymerization reaction.

         generally in coating rear, make elastomer cooling 至SIS链段 Tg below/following, 则SIS material crosslinked, again use electronics or outer 照射, also 进行部 separation chemical crosslinked, can material crosslinked 不足, can large degree improve/increase agent resistant temperature property and resistant solvent agent property, effect/influence viscous property.

        紫 outer and electronics modified can improve/increase strong/high degree and viscous property, combined certain field/area application, ring 境污染 small, raw materials and can consumption less, is very has development outlook/prospects technology.