Back to results
US 5,629,083 AGranted
Method of manufacturing cellulosic composite and product thereof
AssigneeMasonite Corporation
InventorZygmunt Teodorczyk
Life of this patent
Estimating the term…
Abstract
A process for the production of modified phenol-aldehyde resins includes the use of a modifier selected from melamine, urea, and other suitable nonvolatile organic compounds. The phenolic component of the resins preferably includes a difunctional phenolic compound. The inventive resins resist precuring and are particularly useful in blowline blending procedures.
Claims20
A method for the production of a wood composite, comprising:
- (a) reacting a phenolic component comprising a phenol and/or a phenol derivative and an aldehyde at an equivalent molar ratio of aldehyde to phenolic component of about 0.55:1 to about 0.8:1 in the presence of an alkaline catalyst;
- (b) reacting a modifier with the product of step (a) to form a modified phenol-aldehyde resin, said modifier comprising melamine and/or urea;
- (c) providing a cellulosic filler;
- (d) combining said resin with said cellulosic filler under heat and with air turbulence;
- (e) forming the product of step (d) into a mat;
- and
- (f) consolidating said mat under heat and pressure to form a wood composite.
4 more elements
A method for the production of a cellulosic composite, comprising:
- (a) reacting a phenolic component comprising a phenol and/or a phenol derivative and formaldehyde at an equivalent molar ratio of formaldehyde to phenolic component of about 0.65:1 to about 0.75:1 in the presence of an alkaline catalyst;
- (b) reacting a modifier with the product of step (a) to form a modified phenol-formaldehyde resin, said modifier comprising melamine and/or urea;
- (c) providing a cellulosic filler comprising wood fibers;
- (d) combining said resin with said cellulosic filler under heat and with air turbulence;
- (e) forming the product of step (d) into a mat;
- and
- (f) consolidating said mat under heat and pressure to form a cellulosic composite.
4 more elements
Dependencies are inferred from the claim text.