Liquid hydroxy-terminated polyesters
US3957753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | May 22, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Solid and microcellular polyurethane elastomers prepared by reacting (a) liquid polyesters containing from about 25 percent by weight to about 70 percent by weight of the epsilon-oxycaproyl unit, the balance of the polyester being derived from the reaction of at least one dicarboxylic acid with at least two glycols selected from the group consisting of ethylene glycol 1,3-propanediol, 1,4-butanediol and 1,5-pentanediol, (b) an organic polyisocyanate, and optionally (c) a chain-extender comprising water, glycols, amino alcohols, or diamines. If the liquid polyester (a) is branched, for example, by addition of small quantities of a triol, the reaction with the organic polyisocyanate may be conducted in the absence of a chain-extender. Processes for producing these elastomers are also disclosed. Novel liquid, substantially primary hydroxyl-terminated, linear and branched polyesters containing from about 25 percent by weight to as much as about 70 percent by weight of the epsilonoxycaproyl unit ##EQU1## the balance of the polyester being derived from the reaction of at least one dicarboxylic acid with at least two straight chain glycols selected from the group consisting of ethylene gl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.