Method of producing urea-formaldehyde resin and foam having redu

Details Method of producing urea-formaldehyde resin and foam having redu Method of producing urea-formaldehyde resin and foam having redu

1980-01-07

1981-05-12

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521187, 521188, 528239, 528240, C08J 930

Patent

active

042672775

ABSTRACT:
A method for producing stable urea-formaldehyde polymers which have reduced aldehyde vapor emissions during their production and use is disclosed, such urea-formaldehyde polymers particularly useful in the production of urea-formaldehyde insulating foam and as adhesives in the production of plywood and particleboard. An alkali or alkaline earth metal borohydride is added to the urea-formaldehyde resin solution prior to or during cure thereof. The boroydride reacts with free formaldehyde in the resin solution or any free formaldehyde subsequently generated in the resin due to hydrolytic break down. The amount of borohydride added the resin solution should be sufficient to reduce the emission of free formaldehyde therefrom.

REFERENCES:
patent: 3231525 (1966-01-01), Kelly et al.
patent: 3979341 (1976-09-01), Widman
patent: 4016111 (1977-04-01), Wolff et al.
patent: 4129533 (1978-12-01), Moore, Jr.

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