Reichhold, Inc.

Antoine Berchem

Krishan K Sudan

Stamatis M Kambanis

Dennis Gregoire

Jaroslav Rybicky

An improved modified phenol-formaldehyde resin, and a process for its preparation, which contains lignosulfonates is described. Typically, the lignosulfonates are in the form of black liquor. These resins are made by including with the phenol a small amount of potassium ferricyanide. Unlike the known processes utilizing black liquors and the like, this process appears to be far less susceptible to the inherent variability of these liquors. These resins can be easily converted into a solid by spray drying, and find use as adhesives, for example in board products.

Lignin-modified phenolic adhesives for pressed wood products

A two-part pack, and method for its preparation, from which a phenol-formaldehyde resin foam may be prepared, which system comprises in the first part of the pack a phenol-formaldehyde resin, a blowing agent which is an inert, low boiling liquid, an effective amount of a nitrogenous modifier capable of permitting dispersion of the blowing agent in the resin, and a surfactant; and in the second part of the pack an acid catalyst system dispersed in a liquid polyhydroxy compound, in a weight ratio of polyhydroxy compound to acid catalyst of at least 1:1. These two-part packs enable simpler handling and placement techniques being shelf storable, compared to the known shelf storable systems which involve three, or more, components.

Phenol formaldehyde foams

Modified phenol-formaldehyde resins, and processes for their preparation, are described wherein board or paper pulping process waste liquor is used as the modifier. The resins may contain, based on solids contents of both resin and waste liquor, from 1:10 to 10:1 parts by weight. These resins are cheaper than conventional resins and also use the waste-liquor without any purification step.

Pulp waste liquor-phenolic resin binder

A two component system, and method for its preparation, from which a phenol-formaldehyde resin foam may be prepared, which system comprises in a first component a phenol-formaldehyde resin, a blowing agent which is an inert, low boiling liquid, an effective amount of a nitrogenous modifier capable of permitting dispersion of the blowing agent in the resin, and a surfactant; and in a second component an acid catalyst system dispersed in a liquid polyhydroxy compound, in a weight ratio of acid catalyst to polyhydroxy compound of at least 1:1. These systems enable simpler handling and placement techniques being shelf storable, compared to the known shelf storable systems which involve three, or more, components.

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St. Hippolyte, Canada

Antoine Berchem