Patent GB-1382258-A (GB)
Title: Room-temperature-curable organopolysiloxanes
IPC: C07F7/10
Filed: 1971-12-30
Abstract: 1382258 Moisture curable organopolysiloxane graft polymers; reactive disiloxanes STAUFFER-WACKER SILICONE CORP 30 Dec 1971 [30 Dec 1970] 60725/71 Headings C3P and C3S Novel moisture-curable organopolysiloxanes of the formula wherein each R<SP>1</SP> independently denotes a cyanoalkyl radical or a monovalent unsubstituted or halogenated hydrocarbon radical, R<SP>2</SP> denotes a divalent hydrocarbon radical, R<SP>3</SP> denotes a polymeric organic radical derived from olefinically unsaturated monomers and bonded to R<SP>2</SP> via a carbon-to-carbon bond, Z denotes a radical hydrolysable by atmospheric moisture, m is 2 or 3, x is zero or a positive integer up to 20,000 and y is a positive integer up to 500, are prepared by reacting an organodisiloxane of the formula with a hydroxyl-terminated grafted organopolysiloxane of the formula Z is exemplified by acyloxy, hydrocarbonoxy, aminooxy, oximo, phosphato and amino groups. The grafted hydroxyl-terminated organopolysiloxane starting materials may be prepared by reacting olefinic monomers with diorganopolysiloxanes in the presence of free radical initiators. Example 36 describes the preparation of such starting materials using as reactants dimethylpolysiloxanes having viscosities from 400 to 6700 c.s., acrylonitrile, methyl, ethyl and butylacrylates, lauryl methacrylate, styrene and vinyl chloride, and either tertiary-butyl peroxide or tertiary-butyl peroctoate free radical initiators. Examples 1 to 35 also describe the preparation of 1,3-dipropyl-1,1,3,3-tetraacetoxy-, 1,3 - dimethyl - 1,1,3,3 - tetracaproyloxy-, 1,3 - dimethyl - 1,1,3,3 - tetraacetoxy-, 1,3- dipropyl - 1,1,3,3 - tetrakis - (N,N - diethylaminooxy)-, 1,3 - dimethyl - 1,1,3,3 - tetrakis- (N,N - diethylaminooxy)-, 1,3 - dimethyl- 1,1,3,3 - tetrakis - (N,N - dioctylaminooxy)-, 1,3 - dimethyl - 1,1,3,3 - tetrakis - (N - butyl- N - ethylaminooxy)-, 1,1,1,3,3,3 - hexakis- (N,N - dimethylaminooxy)-, 1,3 - dibutyl- 1,1,3,3 - tetrakis - (N,N - dimethylaminooxy)-, 1,3 - dimethyl - 1,1,3,3 - tetraacetoximino-, 1,3- dibutyl - 1,1,3,3 - tetraacetoximino-, 1,3 - dimethyl - 1,1,3,3 - tetraacetophenoximo-, 1,3- dimethyl - 1,1,3,3 - tetrabenzophenoximo-, 1,3- dimethyl - 1,1,3,3 - tetrabutyraldoximo-, 1,3- dimethyl - 1,1,3,3 - tetrahexanoximo-, 1,3- dimethyl - 1,1,3,3 - tetrakis - (methylethylketoximino)-, 1,3 - dipropyl - 1,1,3,3 - tetraacetoximino-, 1,3 - dimethyl - 1,1,3,3 - tetrakis - (diethylphosphato)-, 1,3 - dibutyl - 1,1,3,3- tetrakis - (dimethylphosphato)-, 1,3 - dimethyl- 1,1,3,3 - tetrakis - (dimethylphosphato)-, 1,3- dimethyl - 1,1,3,3 - tetrakis - (diphenylphosphato) - , 1,3 - dimethyl - 1,1,3,3 - tetrachloro-, 1,3 - dimethyl - 1,1,3,3 - tetraethoxy-, 1,3- dimethyl - 1,1,3,3 - tetrabutoxy-, 1,3 - dibutyl- 1,1,3,3 - tetraethoxy-, 1,3 - dimethyl - 1,1,3,3- tetraphenoxy - 1,3 - dimethyl - 1,1,3,3 - tetrakis - (N,N - diethylamino)-, 1,3 - dibutyl- 1,1,3,3 - tetrakis - (N,N - diethylamino)-, 1,3- dimethyl - 1,1,3,3 - tetrakis - (N,N - dicyclohexylamino)- and 1,3 - dibutyl - 1,1,3,3- tetrakis - (N - butyl - N - ethylamino) - 1,3- disiloxanes. The moisture-curable organopolysiloxane products may be compounded with mineral fillers such as silica, oxides of Fe, Zn, Cd and Al, and carbonates and/or with curing catalysts. Uses.-As coating or caulking compounds.