Adhesive composition for lignocellulose-type hot-pressed forms, and hot-pressed form production process using the same
US6635695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Dec 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2400/303
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An adhesive composition for lignocellulose-type hot-pressed forms is disclosed which comprises (A) an organopolyisocyanate which is a polyisocyanate composed chiefly of from 20% by weight to 70% by weight of a diphenylmethane diisocyanate having two benzene rings in one molecule and from 80% by weight to 30% by weight of a diphenylmethane diisocyanate polynuclear condensate having at least three benzene rings in one molecule, and has a viscosity of 500 mPa·s or less in the state of solid content=100% by weight at 25° C.; and (B) a wax emulsion prepared by emulsifying a wax (B1) which is a paraffin wax containing at least 80% by weight of a paraffin having 20 to 40 carbon atoms, and has a melting point of from 40° C. to 100° C., with an emulsifier (B2) which is an ethylene oxide polyaddition product of an aliphatic monoalcohol whose aliphatic chain has 14 to 20 carbon atoms. Also disclosed is a process for producing lignocellulose-type hot-pressed forms, using this adhesive composition. The adhesive composition has a good releasability from heating platens used in hot-press forming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.