Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1998-12-17
2000-09-05
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528254, 525484, 525498, 428528, 428505, 428506, 428511, C08G 1404, C08G 810, C08G 828
Patent
active
061144916
ABSTRACT:
The preparation of phenol-formaldehyde and melamine-formaldehyde resin-based binders extended with a cyclic urea-formaldehyde prepolymer and to products prepared using the binders. More particularly, the invention relates to a cyclic urea prepolymer comprising urea, formaldehyde, and ammonia or a primary amine which, when added to a phenol-formaldehyde or melamine-formaldehyde based resin, results in a useful binder for the manufacturer numerous articles.
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Dupre F. C.
Foucht Millard E.
Freese William P.
Gabrielson Kurt D.
Gapud Benjamin D.
Georgia-Pacific Resins Inc.
Truong Duc
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