Reference

Low-modulus room-temperature-vulcanizable silicone rubber compositions

Low-modulus room-temperature-vulcanizable silicone rubber compositions. Lampe, Warren R. (General Electric Co., USA). U.S. US 4410677 A 18 Oct 1983, 11 pp. Cont.-in-part of U.S. Ser. No. 927,787, abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G077-04. NCL: 528017000. APPLICATION: US 83-479342 28 Mar 1983. PRIORITY: US 78-927787 25 Jul 1978. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 39 A low-modulus room temp.-vulcanizable silicone rubber sealant having good shelf life comprises a silanol-terminated diorganopolysiloxane, a filler, an acyloxy-functional silane crosslinker, Zn salt and Zr salt catalysts, and a cocatalyst consisting of alkyltin salts of a carboxylic acid and either a Zn salt or a Zr salt of a carboxylic acid. Thus, dimethylsilanol-stopped polysiloxane was mixed with treated fumed silica filler 18.5, di-Me siloxane oil 25, silicone oil 25, and catalyst consisting of methyltriacetoxysilane [4253-34-3], di-tert-butoxydiacetoxysilane [13170-23-5], dimethyltin neodecanoate [25168-22-3], and zirconium octanoate [18312-04-4] 4.2 wt. parts. The compn. was characterized by application rate 102 g/min, tack-free time 20 min, heat-aged Shore A hardness 43, heat-aged tensile strength 170 psi, heat-aged elongation 93%, ASTM tensile product 16.0 ′ 103, and adhesion (180° peel) to anodized Al 75 lb/in vs. 146, 25, 51, 100, 50, 5.0 ′ 103, and 66, resp., for a prior-art sealant.

Self-leveling silicone sealing compositions

Self-leveling silicone sealing compositions. Beers, Melvin Dale; Dean, John William (General Electric Co., USA). Ger. Offen. DE 3609543 A1 2 Oct 1986, 29 pp. (Germany) CODEN: GWXXBX. CLASS: ICM: C08L083-04. ICS: C08K005-17; C08K005-09; C08K003-36; C08K009-06; C09K003-10. ICA: C08J003-24; C08G077-14. APPLICATION: DE 86-3609543 21 Mar 1986.There are some reagents with their cas registry numbers 77-58-7 and 13170-23-5 are used in this study. PRIORITY: US 85-716073 26 Mar 1985. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 39 The title compns., curable to elastomers by moisture, contain acyloxy-terminated siloxanes, condensation catalysts, and amines. A mixt. of OH-terminated di-Me siloxane (viscosity 18 Pa-S) 100, di-Me siloxane contg. 0.5% dihexylamine (I) 2.0, M, D, T-OH fluid 15, fumed SiO2 20, and 79.5:19.9:0.6 MeSi(OAc)3-(BuO)2Si(OAc)2-Bu2Sn dilaurate 4.2 parts had flow rate 79 s/4 in.; compared with 3 min/0.4 in. with 5 ppm I, and 82 s/4 in. when 100 ppm I was added directly. .