Adhesive composition comprising isocyanate phenol-formaldehyde and tannin, useful for manufacturing plywoods for exterior application
US5407980A · kind A · utility
13Cited by
5References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 18, 1992 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Nov 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to an adhesive composition for manufacturing plywood for exterior application including: PA1 a) 121 parts by weight phenolic resin; PA1 b) 5 to 121 parts by weight isocyanate; PA1 c) 1 to 40 parts by weight tannin selected from the group consisting of pine, quebracho, mimosa, and combinations thereof; PA1 d) 1 to 15 parts by weight paraformaldehyde or formaldehyde solutions in water; PA1 e) 5 to 50 parts by weight of water; and PA1 f) an amount of filler comprising inorganic and/or organic materials for providing the composition with the desired viscosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.