Process for preparing a cured copolyetherester elastomeric composition
US4292151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Feb 27, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/668
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a cured copolyetherester elastomeric composition comprising following steps I and II: PA0 Step I: melt-extruding an uncured linear copolyetherester elastomeric composition of [A] and [B] to follow: PA1 [A] a linear copolyetherester elastomer composed of PA1 (A-1) a hard segment consisting of PA2 (i) an acid component of which at least 70 mol % is an aromatic dicarboxylic acid and PA2 (ii) a diol component having an average molecular weight of up to 350 and PA1 (A-2) a soft segment consisting of PA2 (iii) a polyalkylene glycol having an average molecular weight of from 500 to 5,000 in an amount of from 10 to 80% by weight based on the elastomer [A]; and PA1 [B] a compound having an unsaturated aliphatic moiety other than unsaturated conjugated moieties, said compound [B] being copolymerized or blended with said elastomer [A], wherein said unsaturated aliphatic moiety is chemically inert at the melt-extruding temperature, the amount of said moiety being 0.001 to 0.5 equivalent per 100 grams of said elastomer [A] PA0 Step II: curing the resulting extrudate by irradiation of actinic light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.