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US 6,211,324 B1Granted
Hydrophobic polyurethane elastomer
AssigneeBayer Aktiengesellschaft
InventorsKarl W. Haider, Jack C. Chan, E. Haakan Jonsson, Uli W. Franz
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Abstract
A hydrophobic polyurethane elastomer is disclosed comprising an isocyanate terminated prepolymer comprising: i) from 30 to 90 percent by weight of an OH terminated homopolymer of butadiene having molecular weight ranging from 1000 to 4000 and an OH functionality of from 1.9 to 2.1; ii) from 10 to 70 percent by weight of an isocyanate and an asymmetric diol chain extender having a molecular weight ranging from 75 to 200.
Claims10
A hydrophobic polyurethane elastomer comprising:
- A) an isocyanate terminated prepolymer comprising:
- i) from 30 to 90 percent by weight of an OH terminated homopolymer of butadiene having a molecular weight ranging from 1000 to 4000, an OH functionality of from 1.9 to 2.1, and which comprises about 100% 1,4-butadiene microstructure;
- ii) from 10 to 70 percent by weight of an isocyanate;
- and
- B) an asymmetric diol chain extender having a molecular weight ranging from 75 to 200.
2 more elements
A hydrophobic polyurethane elastomer comprising:
- A) an isocyanate terminated prepolymer comprising:
- i) from 55 to 80 percent by weight of an OH terminated homopolymer of butadiene having a molecular weight of about 2150 and an OH functionality of from 1.95 to 2.0., and which comprises about 100% by weight of 1,4-butadiene microstructure;
- and
- ii) from 20 to 45 percent by weight of diphenylmethane 4,4′-diisocyanate;
- and
- B) 2,2,4-trimethylpentane-1,3 diol (TMPD).
3 more elements
Dependencies are inferred from the claim text.