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US 6,352,661 B1Granted
PMDI wood binders containing hydrophobic diluents
AssigneeBayer Aktiengesellschaft
InventorsJames A. Thompson, Ashok M. Sarpeshkar, James W. Rosthauser, Peter H. Markusch
Life of this patent
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Abstract
The present invention relates to a process for producing lignocellulose composite materials by combining lignocellulose particles with a binder composition, followed by molding or compressing the combined lignocellulose particles and binder composition. Suitable binder compositions comprise a polymethylene poly(phenylisocyanate) component and a liquid hydrophobic diluent that is characterized by a flash point of at least 250° F.
Claims15
A process for the production of lignocellulose composite materials comprising:
- A) combining lignocellulose particles with 1.5 to 7% by weight, based on the total weight of the lignocellulose composite, of a binder composition comprising:
- (1) 50 to 95% by weight, based on 100% by weight of (1) and (2), of an isocyanate component selected from the group consisting of:
- (a) a polymethylene poly(phenylisocyanate) having an NCO group content of from about 30 to 33% by weight, and
- (b) a semi-prepolymer of polymethylene poly(phenylisocyanate) having an NCO group content of from about 25 to 32% by weight;
- and
- (2) 5 to 50% by weight, based on 100% by weight of (1) and (2), of a liquid hydrophobic diluent having a flash point above 250° F., and which is only slightly or negligibly soluble in water;
- and
- B) molding or compressing the combination formed in A), thus forming the lignocellulose composite material.
5 more elements
Dependencies are inferred from the claim text.