Urethane elastomer with active hydrogen containing monoethylenically unsaturated monomer
USRE29772E · kind E · reissue
3Cited by
4References
28Claims
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Key dates
| Filing date | Nov 20, 1972 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Nov 20, 1992 |
Classification
- Technology area (CPC —)General
Abstract
A urethane elastomeric impact modifier is provided for 15 rigid thermoplastic polymers. Polyester and polyether urethane elastomers are grafted to the acrylic polymers. Preferred is a polyester, diisocyanate and glycol urethane elastomer terminated with a functional monomer capable of ethylenic polymerization grafting with the acrylic polymer. The modified polymers offer an improved balance of physical properties including higher impact strength, clarity, and weather resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.