Polymeric blends containing a monoorganic polysiloxane resin
First Claim
1. A flame retarded, melt processable polymer composition, comprising a blend of (a) non-silicone polymer that is an elastomer or a thermoplastic polymer, (b) solid, non-elastomeric, monoorganic polysiloxane resin comprising at least 80% by weight of polymerized units of the formula RSiO1.5 where R is hydrogen or an organic group, at least 85% of the R groups being organic groups, the non-silicone polymer and the monorganic siloxane resin being present in a weight ratio of from 10:
- 1 to 1;
1, wherein the monoorganic polysiloxane resin has a number average molecular weight in the range of from 2000 to 6000 and a hydroxyl content of less than 2% by weight, and (c) an effective amount of filler providing enhanced fire retardant properties.
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Abstract
The invention relates to novel melt processable polymer compositions which comprise a blend of non-silicone polymer and a monoorganic polysiloxane resin. Such compositions are useful inter alia as flameproof and moisture resistant coating compositions and in the product of heat shrinkable silicone elastomer compositions.
64 Citations
34 Claims
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1. A flame retarded, melt processable polymer composition, comprising a blend of (a) non-silicone polymer that is an elastomer or a thermoplastic polymer, (b) solid, non-elastomeric, monoorganic polysiloxane resin comprising at least 80% by weight of polymerized units of the formula RSiO1.5 where R is hydrogen or an organic group, at least 85% of the R groups being organic groups, the non-silicone polymer and the monorganic siloxane resin being present in a weight ratio of from 10:
- 1 to 1;
1, wherein the monoorganic polysiloxane resin has a number average molecular weight in the range of from 2000 to 6000 and a hydroxyl content of less than 2% by weight, and (c) an effective amount of filler providing enhanced fire retardant properties. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
- 1 to 1;
Specification