Dispersant for carbon black-filled foam
US5137930A · kind A · utility
13Cited by
14References
25Claims
0Family size
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Inventor
Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2471/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A closed cell, rigid, polymer foam comprising the reaction product of a polyisocyanate and an isocyanate-reactive compound in the presence of (a) a foaming agent, (b) at least about 2 percent by weight of carbon black, based on the weight of the polymer in the foam, and (c) a capped polyoxyalkylene compound which helps bring about a uniform dispersion of the carbon black throughout the foam so that the aged k-factor of the foam is below the aged k-factor of the corresponding unfilled foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.