公开(公告)号：US4303484A

公开(公告)日：1981-12-01

申请号：US68593

申请日：1979-08-22

申请人： Minoru Takamizawa ,  Fumio Okada ,  Yasuaki Hara ,  Aoki, Hisashi

发明人： Minoru Takamizawa ,  Fumio Okada ,  Yasuaki Hara ,  Aoki, Hisashi

IPC分类号： C08F2/46 ,  C08L83/08 ,  D21H19/32 ,  G03F7/075

CPC分类号： G03F7/0757 ,  C08F2/46 ,  C08L83/08 ,  D21H19/32 ,  Y10S522/904 ,  Y10T428/31663 ,  Y10T428/31667

摘要： A novel photocurable composition suitable for preparing, for example, release papers is proposed which is formulated with photocrosslinkable organopolysiloxanes necessitating no conventional photosensitizers. Thus, the composition comprises(a) an organopolysiloxane having at least two mercaptoalkyl, e.g. mercaptopropyl, groups bonded to the silicon atoms in a molecule,(b) an organopolysiloxane having at least two alkenyl, e.g. vinyl groups directly bonded to the silicon atoms in a molecule, and(c) an organopolysiloxane having at least one benzoin group ##STR1## where Ph is a phenyl group, bonded to the silicon atom in a molecule, which component (c) serves as a photosensitizing ingredient. Alternatively, the inventive composition comprises (a) a mercaptoalkyl-containing organopolysiloxane as above and (b') an organopolysiloxane having, simultaneously, at least two alkenyl groups and at least one benzoin group directly bonded to the silicon atoms in a molecule, which component (b') serves both as the crosslinking agent and as the photosensitizing ingredient simultaneously. Owing to the unquestionable affinity of the photosensitizing ingredient with the other components, the inventive compositions have very high sensitivity in photocuring along with several other advantageous characteristics.

摘要翻译： 提出了适用于制备例如离型纸的新型光固化性组合物，其与光可交联的有机聚硅氧烷配制，不需要常规的光敏剂。 因此，组合物包含（a）具有至少两个巯基烷基的有机聚硅氧烷。 巯基丙基，分子中与硅原子键合的基团，（b）具有至少两个烯基的有机聚硅氧烷，例如 分子中直接与硅原子键合的乙烯基，和（c）具有至少一个苯偶姻基团的成分的有机聚硅氧烷，其中Ph是分子中与硅原子键合的苯基，该组分（c）用作 光敏成分。 或者，本发明的组合物包含（a）如上所述的含巯基烷基的有机聚硅氧烷和（b'）有机聚硅氧烷，其同时具有至少两个烯基和至少一个与分子中的硅原子键合的苯偶姻基团，该组分 （b'）同时用作交联剂和光敏成分。 由于光敏成分与其它组分的无疑的亲和性，本发明的组合物在光固化中具有非常高的灵敏度以及若干其它有利特征。