Amino resin and a method for its production

Details Amino resin and a method for its production Amino resin and a method for its production

1989-06-06

1990-09-04

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

1563313, 156335, 524541, 525495, 525498, C08L 6100

Patent

active

049545817

ABSTRACT:
The invention relates to a resin for the production of cellulose based products, such as particle boards. The resin is a condensation product of formaldehyde, urea and phenol and optionally melamine with a molar ratio of 1.4-0.8 moles of urea, 0.006-0.04 moles of phenol and 0-0.04 moles of melamine per mole formaldehyde. The invention also relates to a method of producing such a resin. According to the method a separately prepared cross-linking agent containing a co-condensate of phenol, formaldehyde and urea or containing a co-condensate of phenol and formaldehyde together with urea, is added to a pre-condensate of formaldehyde, urea and optionally melamine, whereafter the mixture is condensed. As an alternative the cross-linking agent can be added to a finished condensate of formaldehyde, urea and optionally melamine.
The invention also relates to a method of manufacturing glued cellulose based products.

REFERENCES:
patent: 3734918 (1973-05-01), Mayer et al.
patent: 4458049 (1984-07-01), Diem et al.

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