公开(公告)号：US6121368A

公开(公告)日：2000-09-19

申请号：US391874

申请日：1999-09-07

申请人： Michael David Heying ,  Michael Andrew Lutz ,  Patricia Kathryn Moline ,  Michael John Watson

发明人： Michael David Heying ,  Michael Andrew Lutz ,  Patricia Kathryn Moline ,  Michael John Watson

IPC分类号： C09J183/07 ,  C08L83/04 ,  C09J105/00 ,  C09J129/04 ,  C09J171/00 ,  C09J183/04 ,  C09J183/05 ,  C09J183/08 ,  C08K5/01 ,  C08K3/36

CPC分类号： C08L83/04 ,  C09J183/04 ,  C08G77/045 ,  C08G77/12 ,  C08G77/16 ,  C08G77/20 ,  C08G77/24 ,  C08G77/42 ,  C08G77/46

摘要： A silicone composition for preparing a silicone pressure sensitive adhesive, the composition comprising (A) 20 to 55 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 45 to 80 parts by weight of an organopolysiloxane resin comprising R.sup.3.sub.3 SiO.sub.1/2 units and SiO.sub.4/2 units wherein each R.sup.3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups, the mole ratio of R.sup.3.sub.3 SiO.sub.1/2 units to SiO.sub.4/2 units is from 0.6:1 to 1.5:1, the resin contains less than about 2 mole percent of alkenyl groups, and the total amount of components (A) and (B) is 100 parts by weight; (C) an organohydrogenpolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule in an amount sufficient to cure the composition; (D) a thixotropic agent in an amount sufficient to impart thixotropy to the composition; and (E) a catalytic amount of a hydrosilylation catalyst; wherein the sum of the average number of silicon-bonded alkenyl groups per molecule in component (A) and the average number of silicon-bonded hydrogen atoms per molecule in component (C) is greater than 4. A silicone pressure sensitive adhesive comprising a reaction product of the silicone composition. A multi-part silicone composition comprising components (A) through (E) in two or more parts, provided neither component (A) nor component (B), when components (B) contains alkenyl groups, are present with components (C) and (E) in the same part.

摘要翻译： 一种用于制备硅氧烷压敏粘合剂的硅氧烷组合物，该组合物包含（A）每分子含有平均至少两个硅键合链烯基的聚二有机硅氧烷20至55重量份; （B）45〜80重量份包含R 33 SiO 1/2单元和SiO 4/2单元的有机聚硅氧烷树脂，其中每个R 3独立地选自一价烃和一价卤代烃基，R 33 SiO 1/2单元的摩尔比 至SiO 4/2单元的比例为0.6:1至1.5:1，树脂含有小于约2摩尔％的烯基，组分（A）和（B）的总量为100重量份; （C）每分子平均具有至少两个与硅键合的氢原子的有机氢聚硅氧烷，其量足以固化该组合物; （D）触变剂，其量足以赋予组合物触变性; 和（E）催化量的氢化硅烷化催化剂; 其中组分（A）中每分子的硅键合链烯基的平均数和组分（C）中每分子的与硅键合的氢原子的平均数之和大于4.一种包含反应的硅氧烷压敏粘合剂 硅酮组合物的产品。 当组分（B）含有烯基时，包含组分（A）至（E）的两部分或多份的多部分有机硅组合物既不含组分（A）也不包含组分（B）），其组分（C）和 （E）同一部分。