Method for preparing polyester foam using cobalt/potassium promotors
US4401771A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1982 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Jul 19, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A foamable and simultaneously curable polyester composition is provided. The composition consists essentially of the following (all being in parts by weight): PA1 (a) 100 parts liquid unsaturated polyester resin, PA1 (b) 0.5 to 10 parts monosubstituted sulfonyl hydrazide having the formula RSO.sub.2 NHNH.sub.2, wherein R is C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.7 -C.sub.10 aralkyl, phenyl, naphthyl, or phenyl substituted with halogen, C.sub.1 -C.sub.12 alkyl or C.sub.1 -C.sub.12 alkoxy, PA1 (c) 0.1 to 5.0 parts of a promoter, said promoter consisting essentially of a mixture of organic heavy metal salt and organic alkali metal salt, wherein the heavy metal/alkali metal molar ratio is from 10/1 to 1/10. PA1 (d) 0 to 2 parts surfactant, PA1 (e) 0 to 250 parts of filler, and PA1 (f) 0.3 to 5 parts of a cross-linking initiating compound selected from organic peroxides and organic hydroperoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.