Reference

N,N'-Bistrimethylsilylurea

N,N'-Bistrimethylsilylurea. (Shin-Etsu Chemical Industry Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59005194 A2 12 Jan 1984 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07F007-10. APPLICATION: JP 82-113687 30 Jun 1982. DOCUMENT TYPE: Patent CA Section: 29 (Organometallic and Organometalloidal Compounds) (Me3SiNH)2CO (I) was prepd. by treating urea with (Me3Si)2NH (II) in the presence of I. 18297-63-7 and 57-13-6 which are cas registry numbers of substances are two of reagents here. Thus, a mixt. of 72 kg urea, 36 kg II (purity 95%), and 120 g I was refluxed at 116-119° to give 98.2% I. .

Vulcanization inhibitors for silicone rubber

Vulcanization inhibitors for silicone rubber. Kniege, Wilfried; Michel, Werner; Ackermann, Juergen; Rudolph, Karl Heinz (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3227018 A1 26 Jan 1984, 31 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08L083-04; C08K005-54; C08K005-14; C08K005-16; C08K003-10. APPLICATION: DE 82-3227018 20 Jul 1982. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) The vulcanization of mixts. of unsatd. siloxanes, SiH compds.In this article, certain chemicals are used. Some of their cas registry numbers are 18297-63-7 and 101-37-1 , fillers, and hydrosilylation catalysts is improved by adding peroxides and complexing agents for Pt as inhibitors. Thus, 143 g mixt. of di-Me siloxane contg. 0.175% CH2:CHSi(Me)O groups 100, pyrolytic SiO2 40, pyrolytic TiO2 2, OH-terminated di-Me siloxane contg. 5% CH2:CHSi(Me)O groups 5.4, and (Me3Si)2NH 0.5 part contg. 10 ppm Pt was mixed with di-Me siloxane contg. 33% MeSi(H)O groups (viscosity 20 mPa-s) 1.5, triallyl cyanurate [101-37-1] 0.025, and bis(2,4-dichlorobenzoyl) peroxide [133-14-2] 0.25 part. This mixt. after 3 wk at room temp. could be replasticized by milling in 0.3 min, and gave vulcanizates with shore A hardness 54, tensile strength 9 MPa, elongation 455%, and rebound resilience 36%. Without the scorch inhibitors, the compn. could not be remilled after 24 h at room temp. .