Method for the production of amino resin

Details Method for the production of amino resin Method for the production of amino resin

1988-01-22

1989-05-16

Pertilla, Theodore E.

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, 525516, C08L 6126

Patent

active

048310891

ABSTRACT:
The invention relates to a method for the production of a resin which is used for manufacturing of an adhesive for cellulose based products. According to the method 30-70% by weight of a urea phenol resin with a molar ratio of 1.4-0.6 moles or urea, 0.006-0.3 moles of phenol and 0-0.04 moles of melamine per mole formaldehyde, are mixed with 70-30% by weight of a melamine resin with a molar ratio formaldehyde: melamine of 1.7-2.4. The urea-phenol resin has been prepared by adding a cross-linking agent containing a co-condensate of phenol, formaldehyde and urea to a pre-condensate of formaldehyde, urea and optionally melamine and condensing under acid conditions.
According to a further embodiment the cross-linking agent is added to a evaporated condensate of formaldehyde, urea and optionally melamine.

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

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