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    • 9. 发明专利
    • Silicone rubber sponge composition
    • 硅橡胶海绵组合物
    • JP2008214440A
    • 2008-09-18
    • JP2007051803
    • 2007-03-01
    • Shin Etsu Chem Co Ltd信越化学工業株式会社
    • HIRABAYASHI SATAOKOIKE YOSHIAKI
    • C08L83/07C08J9/06C08K3/04C08K5/23C08K5/32C08L83/05
    • C08J9/102C08G77/12C08G77/16C08G77/20C08G77/70C08J9/0004C08J9/0061C08J9/0066C08J2201/024C08J2383/04C08J2483/00C08L83/04C08L83/00
    • PROBLEM TO BE SOLVED: To provide a silicone rubber composition capable of forming a highly foamed silicone rubber sponge excellent in normal pressure hot-air crosslinking (HAV) foamability, forming highly foamed silicone rubber sponge having a uniform fine cell structure and a smooth skin layer surface without considering crosslinking rate of organopolysloxane forming silicone rubber sponge and a delicate combination of the foam and the organoperoxide, and capable of easily obtaining a safe sponge generating no toxic cyano compound in the decomposition gas of the foaming agent. SOLUTION: The silicone rubber sponge composition comprises (A) an organopolysiloxane represented by formula (I): R 1 a SiO (4-a)/2 [wherein, R 1 is a same or different (substituted) univalent hydrocarbon; and (a) is a positive number of 1.95-2.04], (B) a non-cyano organoazo foaming agent having characteristics of thickening or curing the (A) ingredient by thermal decomposition, (C) an azodicarbonamide-based foaming agent and/or a dinitrosopentamethylenetetramine-based foaming agent and (D) a curing agent, and can perform normal pressure hot-air crosslinking foaming. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了提供能够形成在常压热空气交联(HAV)发泡性优异的高发泡硅橡胶海绵的硅橡胶组合物,形成具有均匀细孔结构的高发泡硅橡胶海绵和 光滑的表皮层表面,而不考虑有机聚硅氧烷形成的硅橡胶海绵的交联速率和泡沫和有机过氧化物的微妙组合,并且能够容易地获得在发泡剂的分解气体中不产生有毒的氰基化合物的安全的海绵。 解决方案:硅橡胶海绵组合物包含(A)由式(I)表示的有机聚硅氧烷:R 1 SP(S-1)/(S) 2 其中R 1是相同或不同的(取代的)一价烃; (A)为1.95-2.04的正数),(B)具有通过热分解使(A)成分变厚或固化的特性的非氰基有机偶氮发泡剂,(C)偶氮二酰胺系发泡剂和/ 或二亚硝基五亚甲基四胺基发泡剂和(D)固化剂,并且可以进行常压热空气交联发泡。 版权所有(C)2008,JPO&INPIT