Claims
- 1. An aqueous silicone emulsion which yields an elastomer upon removal of the water comprising the product obtained by mixing
- (A) 100 parts by weight of polydiorganosiloxane having alkoxysilyl endblocking groups with at least two alkoxy radicals attached to the silicon atom, and
- (B) sufficient titanium catalyst selected from the group consisting of titanium esters, organosiloxy titanium compounds, and beta-dicarbonyl titanium compounds to crosslink the polydiorganosiloxane of (A), and
- thereafter adding water and ionic or non-ionic stabilizer, emulsifying the resulting product, and obtaining the aqueous silicone emulsion.
- 2. The emulsion of claim 1 in which there is from 0.2 to 6 parts of titanium catalyst.
- 3. The emulsion of claim 1 in which the polydiorganosiloxane of (A) is an alkoxysilethylene endblocked polydiorganosiloxane.
- 4. The emulsion of claim 1 in which the polydiorganosiloxane of (A) is a polydiorganosiloxane having ##STR10## endblocking.
- 5. The emulsion of claim 3 in which there is from 0.2 to 6 parts of titanium catalyst and further comprising a filler.
- 6. The emulsion of claim 4 in which there is from 0.2 to 6 parts of titanium catalyst and further comprising a filler.
- 7. The emulsion of claim 5 in which the filler is a reinforcing filler.
- 8. The emulsion of claim 6 in which the filler is a reinforcing filler.
- 9. The emulsion of claim 7 in which the reinforcing filler is present in an amount of from 5 to 20 parts by weight per 100 parts by weight of polydiorganosiloxane.
- 10. The emulsion of claim 8 in which the reinforcing filler is present in an amount of from 5 to 20 parts by weight per 100 parts by weight of polydiorganosiloxane.
- 11. An aqueous silicone emulsion which yields an elastomer upon removal of the water comprising the product obtained by mixing an organic solvent which is non-reactive with tetraalkyltitanate, a tetraalkyltitanate, and a polydiorganosiloxane having alkoxysilyl endblocking groups with at least two alkoxy radicals attached to the silicon atom, thereafter adding an ionic or non-ionic stabilizer and water, emulsifying the resulting mixture, and removing the organic solvent to obtain the aqueous silicone emulsion.
- 12. The emulsion of claim 11 in which the organic solvent is n-hexane, the tetraalkyltitanate is tetrabutyltitanate, the polydiorganosiloxane is methyl(dimethoxy)siloxy endblocked polydimethylsiloxane, and the stabilizer is sodium lauryl sulfate.
- 13. The emulsion of claim 11 further comprising adding water sufficient to replace water lost during the removal of the organic solvent.
- 14. The emulsion of claim 12 further comprising adding water sufficient to replace water lost during the removal of the n-hexane.
- 15. The emulsion of claim 1 in which the alkoxysilyl endblocking group is selected from the group consisting of radicals of the formula ##STR11## and radicals of the formula ##STR12## where each R is a radical free of aliphatic unsaturation and is a radical selected from the group consisting of monovalent hydrocarbon, monovalent halohydrocarbon, and monovalent cyanoalkyl radicals of 1 to 18 inclusive carbon atoms, each R" is a radical selected from the group consisting of methyl, ethyl, propyl, and butyl, Z is a divalent hydrocarbon radical or a combination of divalent hydrocarbon radicals and siloxane radicals, and m is 0 or 1.
Parent Case Info
This is a continuation-in-part of application Ser. No. 08/113,029 filed on Aug. 30, 1993 now U.S. Pat. No. 5,438,095.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0368500 |
May 1990 |
EPX |
Non-Patent Literature Citations (1)
Entry |
European Search Report of Jun. 17, 1996. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
113029 |
Aug 1993 |
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