EP0201284A2
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EP
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Silicone water-based caulking material
Assignee: Dow Silicones Corp
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Filing: 1986-05-01
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Granted: —
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Expires: 2006-05-01
Abstract
Abstract @ An aqueous silicone elastomeric emulsion is a storage stable, paste-type material useful as a caulking material. The caulking material is obtained by mixing an anionic emulsion containing dispersed particles of hydroxyl endblocked polydiorganosiloxane, dialkyltindicarboxylate, silane of the formula RSi(OR') 3 where R is a monovalent hydrocarbon radical of from 1 to 4 carbon atoms inclusive and R' is a lower alkyl radical of from 1 to 4 carbon atoms inclusive or a radical of the formula -N=CR 2 , and inert, non-siliceous filler.
Inventors
- 👤 Christine Jean Schoenherr
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:23
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
200 words
A silicone composition consisting essentially of the aqueous emulsion obtained by mixing (A) 100 parts by weight of an anionically stabilized, hydroxyl endblocked polydiorganosiloxane having a weight average molecular weight of above 50,000, the organic radicals being monovalent hydrocarbon radicals containing less than -7 carbon atoms per radical and 2-(perfluoroalkyl)ethyl radicals having less than 7 carbon atoms per radical, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9 and a solids content of greater than 50% by weight, (B) from 0.075 to 0.75 part by weight of dialkyltindicarboxylate, (C) from 0.2 to 5 parts by weight of silane of the formula RSi(OR') 3 where R is a monovalent hydrocarbon radical of from 1 to 4 carbon atoms inclusive and-R' is a lower alkyl radical of from 1 to 4 carbon atoms inclusive or a radical of the formula -N=CR 2 where R is as defined above and, (D) from 50 to 200 parts by weight of inert, non-siliceous filler, to produce a paste-type emulsion having a total solids content of greater than 70% by weight and being useful as caulking material that cures upon removal of the water to an elastomer.
Claim 2
Dependent Claim
200 words
A silicone composition consisting essentially of the aqueous emulsion obtained by mixing (A) 100 parts by weight of an anionically stabilized, hydroxyl endblocked polydiorganosiloxane having a weight average molecular weight of above 50,000, the organic radicals being monovalent hydrocarbon radicals containing less than -7 carbon atoms per radical and 2-(perfluoroalkyl)ethyl radicals having less than 7 carbon atoms per radical, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9 and a solids content of greater than 50% by weight, (B) from 0.075 to 0.75 part by weight of dialkyltindicarboxylate, (C) from 0.2 to 5 parts by weight of silane of the formula RSi(OR') 3 where R is a monovalent hydrocarbon radical of from 1 to 4 carbon atoms inclusive and-R' is a lower alkyl radical of from 1 to 4 carbon atoms inclusive or a radical of the formula -N=CR 2 where R is as defined above and, (D) from 50 to 200 parts by weight of inert, non-siliceous filler, to produce a paste-type emulsion having a total solids content of greater than 70% by weight and being useful as caulking material that cures upon removal of the water to an elastomer.
Claim 3
Dependent Claim
26 words
The composition of claim 1 in which the polydiorganosiloxane is a polydimethylsiloxane having a weight average molecular weight in the range of from 200,000 to 700,000.
Claim 4
Dependent Claim
38 words
The composition of claim 1 in which the dialkyltindicarboxylate is selected from the group consisting of dibutyltindiacetate, dibutyltindilaurate, and dioctyltindilaurate, in an amount of from 0.2 to 0.4 part by weight per 100 parts by weight of polydiorganosiloxane.
Claim 5
Dependent Claim
39 words
The composition of claim 1 in which the silane is selected from the group consisting of methyltrimethoxysilane, vinyltrimethoxysilane, and methyltri(ethylmethyl- oximo)silane is an amount of from 0.4 to 2 parts by weight per 100 parts by weight of polydiorganosiloxane.
Claim 6
Dependent Claim
58 words
The composition of claim 1 in which the filler is selected from the group consisting of ground quartz, aluminum oxide, titanium dioxide, zinc oxide, and calcium carbonate, has an average particle size of less than 5 micrometers, and is present in an amount of from 125 to 175 parts by weight per 100 parts by weight of polydiorganosiloxane.
Claim 7
Dependent Claim
57 words
The composition of claim 2 in which the dialkyltindicarboxylate is dioctyltindilaurate or dibutyltindilaurate in an amount of from 0.2 to 0.4 part by weight, the silane is methyltrimethoxysilane or vinyltrimethoxysilane in an amount of from 0.4 to 2 parts by weight, and the filler is calcium carbonate having an average particle size of less than 2 micrometers.
Claim 8
Dependent Claim
54 words
The composition of claim 1 which also includes (E) from 0.05 to 0.25 part by weight of aminoalkoxysilane of the formula QR a Si(OR') 3-a where Q is an amine functional group, R is an alkyl group of from 1 to 4 carbons, R' is as defined above, and a is 0 or 1.
Claim 9
Dependent Claim
22 words
The composition of claim 7 in which the aminoalkoxysilane is present in an amount of from 0.05 to 0.125 part by weight.
Claim 10
Dependent Claim
11 words
The composition of claim 7 in which the. aminoalkoxysilane is 3-(2-aminoethylamino)propyltrimethoxysilane.
Claim 11
Dependent Claim
11 words
The composition of claim 7 in which the aminoalkoxysilane is aminopropyltriethoxysilane.
References Cited (Backward Citations)
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