NH.sub.4 SSL-PF thermosetting resin and method of binding lignoc

Details NH.sub.4 SSL-PF thermosetting resin and method of binding lignoc NH.sub.4 SSL-PF thermosetting resin and method of binding lignoc

1984-05-29

1986-04-01

Kight, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 73, 524 74, 524735, 528143, 528145, 264123, 264126, 26433122, C08G 810, B29C 500

Patent

active

045798923

ABSTRACT:
A low cost method of binding lignocellulosic materials utilizing a novel ammonium based spent sulphite liquor, with phenol and formaldehyde or phenol-formaldehyde thermosetting resin as the binder is disclosed. Phenol-formaldehyde which normally reacts with ammonium lignosulfonate under acidic conditions and is unstable under these conditions, can be dispersed or otherwise held in suspension and can be mixed direct with the material by spraying. The constituants of the novel binder can also be mechanically dispersed when in dry powder form. The binder has improved adhesion characteristics and a shorter cure time over existing binders using a spent sulphite liquor base when in combination with phenol-formaldehyde.

REFERENCES:
patent: 2786008 (1957-03-01), Herschler
patent: 3940352 (1976-02-01), Wennerblom et al.
patent: 4105606 (1978-08-01), Forss et al.
patent: 4127544 (1978-11-01), Allan

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