Integral skin microcellular polyester base polyurethane elastomers
US4287307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1980 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Mar 5, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Synthesis of integral skin microcellular polyurethane elatomers by reacting hydroxyl-terminated aliphatic polyesters with symmetrical diisocyanates, prepolymers of these isocyanates such as derived from p,p'-diphenylmethane diisocyanate and an aliphatic glycol and mixtures thereof, these are polymerized in the presence of an organic blowing agent, and one or more plasticizers such as of the formulae ##STR1## further enhancement of the results is brought about by the presence of catalysts and cell regulating agents, such as dimethylpolysiloxanes; the obtained elastomers are useful, such as for shoe soles and in the manufacture of other products, e.g., vibration dampening devices, floatation devices, gaskets and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.