Method for producing phenol resin foams and method of making foamed laminates
US5008297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | May 25, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2361/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a method for producing resol type phenol resin foams by using starting material for the foams prepared by blending a resol type phenol resin, a blowing agent and a catalyst, a low molecular weight resol type phenol resin with the number average molecular weight of less than 200 and a high molecular weight resol type phenol resin with the number average molecular weight of greater than 200 are mixed at a weight ratio of from 5/95 to 80/20 and used as the resol type phenol resin. The resol type phenol resin foams are excellent in adhesion, fire-proofness capable of foaming cure in a short time and useful for sprayed-in-place foaming, etc. The phenol resin foams produced by the invention are capable of integral foaming with rigid urethane resin foam layer into foamed laminates of excellent thermal insulation, fire-proofness, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.