Boiling water and weather resistant cellulose fiber reinforced board material
US4201835A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1978 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | Mar 28, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2213
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A binder for cellulose fiber reinforced board material comprising a mixture of: PA1 (a) a weakly alkaline phenol-formaldehyde condensate resin with a phenolic compound to formaldehyde mol ratio of 1:1.5 to 1:3.0, preferably of 1:1.8 to 1:2.7, and with an alkali content of .ltoreq. 15% by weight NaOH or KOH, related to the solids content of the resin; PA1 (b) a di- and/or poly-functional isocyanate in a quantity of from 5% to 25% by weight, related to (a); and PA1 (c) a tertiary alkyl and/or aralkyl amine and/or alkylenpolyamine in a quantity of from 0.1% to 5% by weight, related to (a). a boiling water and weather resistant board material containing said binder and a process for the production of said board material are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.