Lignocellulosic particle board cured with alkali- and acid-catal

Details Lignocellulosic particle board cured with alkali- and acid-catal Lignocellulosic particle board cured with alkali- and acid-catal

1974-04-03

1976-07-06

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428304, 428323, 428525, 428529, 156335, 162 13, B32B 702, B32B 2108

Patent

active

039682943

ABSTRACT:
A fast cured lignocellulosic particle board comprises a hot consolidated laminar mat of lignocellulosic particles. The mat has a middle lamina of particles coated with a fast setting, acid catalyzed, phenol aldehyde thermosetting resin, while the two surface laminae comprise particles coated with a relatively slow curing, alkali catalyzed phenol aldehyde thermosetting resin. The middle lamina is fast curing, but potentially adherent to the metal cauls of the hot press in which the board is manufactured. Although the surface laminae are slower curing, they are nonadherent to the cauls. The net result is a non-sticking particle board curable in the press in about one-half the press time conventionally required.

REFERENCES:
patent: 2502498 (1950-04-01), Williamson et al.
patent: 2831794 (1958-04-01), Elmendorf
patent: 3308013 (1967-03-01), Bryant
patent: 3554941 (1971-01-01), Varnell
patent: 3649424 (1972-03-01), Rhiando
patent: 3668286 (1972-06-01), Brooks et al.
patent: 3769143 (1973-10-01), Kulesza

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