| 摘要 |
<p>1534002 Solvent-free adhesive coating compositions GENERAL ELECTRIC CO 25 Sept 1975 [14 Nov 1974] 39325/75 Heading C3T A solvent-free adhesive coating composition consists of (a) a vinyl-terminated polysiloxane of average unit formula R a Vi b SiO 4-a-b/2 together with a Pt catalyst, or a silanol-terminated diorganopolysiloxane together with an organotin catalyst, and (b) a hydrogen siloxane R a H b SiO 4-a-b/2 , wherein R is a hydrocarbyl, halohydrocarbyl or cyanoalkyl radical, a is 0 to 3, b is 0À005-2 and a+b is 0À8 to 3, the viscosity of the polysiloxane (a) being 100- 5000 cs./25‹ C. In Example 1 10 p.b.w. of a methylhydrogen polysiloxane and 3 p.b.w. of dibutyltin di-2-ethyl-hexoate are added to 100 p.b.w. of a polydimethylsiloxane diol. In Examples 2 and 3, 5 p.b.w. of a methylhydrogen polysiloxane and 0À0005 p.b.w. of Pt (5% H 2 PtCl 6 in butanol) is added to 100 p.b.w. of vinyl-terminated polydimethylsiloxane. The mixtures are applied to paper and cured.</p> |
