Claims
- 1. In a process for the production of cellular polyurethane plastics comprising:
- (A) polyisocyanates with
- (B) polyhydroxyl compounds containing inorganic fillers and having a molecular weight of from 500 to 10,000 and, optionally,
- (C) other isocyanate-reactive compounds, optionally in the presence of
- (D) catalyts, blowing agents and other additives known per se,
- the improvement wherein component (B) is a stabilized suspension obtained by reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30.degree. to 200.degree. C.
- 2. The process of claim 1, wherein said suspension comprises 5 to 75%, by weight, of an inorganic filler in a polyhydroxy polyether having a molecular weight of from 500 to 10,000.
- 3. The process of claim 1, wherein the reaction temperature is from 100.degree. to 150.degree. C.
- 4. The process of claim 2, wherein said polyisocyanate is diisocyanate.
- 5. The process of claim 1, wherein said suspension contains 20 to 50%, by weight, of chalk powder having a particle size of less than 10 .mu.m in a polyhydroxy polyether having a molecular weight of from 1,000 to 7,000.
Priority Claims (1)
Number |
Date |
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2834623 |
Aug 1978 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 061,715, filed July 30, 1979, and now U.S. Pat. No. 4,240,950, issued Dec. 23, 1980.
US Referenced Citations (4)
Divisions (1)
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Number |
Date |
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Parent |
61715 |
Jul 1979 |
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