Foamable phenolic resin composition and process for preparation thereof
US5137931A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 29, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Mar 29, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2471/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a foamable phenolic resin composition comprising, as indispensable components, 100 parts by weight as solids of a resol type phenolic resin, 3 to 100 parts by weight of an acidic curing agent, 1 to 50 parts by weight of a blowing agent, 0.1 to 50 parts by weight of a saccharide and 0.1 to 10 parts by weight of a foam stabilizer, in which a partial or complete acetylation product of a castor oil/ethylene oxide adduct having a hydroxyl value smaller than 15 mg-KOH/g, which is obtained by acetylating a castor oil/ethylene oxide adduct formed by adding 20 to 70 moles of ethylene oxide to 1 mole of castor oil is used as the foam stabilizer and/or a resol type liquid penolic resin obtained by subjecting a phenol and an aldehyde to addition condensation reaction in the presence of a catalyst having a metal ion-forming capacity, in which the residual amount of the catalyst is smaller than 0.1 part by weight as the metal element per 100 parts by weight of the resol type phenolic resin, is used as the resol type liquid phenolic resin. This foamable phenolic resin composition provides a foam which has an excellent brittle resistance, heat-insulation, and stability with time, and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.