Patent GB-392226-A (GB)
Title: Improvements in or relating to resinous compositions from phenols and acetaldehyde or polymers thereof
IPC: C08G8/28
Filed: 1931-11-18
Abstract: A non-reactive resinous product, which may be rendered reactive by the addition of a methylene-containing hardening agent, is prepared by heating a phenol-acetaldehyde condensation product or ingredients capable of forming such a condensation product with a fatty oil until the viscous liquid product formed becomes clear and brittle on cooling.  The product is soluble in the usual hydrocarbon solvents and in mixtures of alcohol with benzol, xylol and like cyclic hydrocarbons.  The product is useful as a varnish with or without the addition of a hardening agent such as hexamethylenetetramine or driers such as cobalt linoleate or, with the addition of a hardening agent, it may be used as a binding agent for mouldable compositions or laminated stock.  In examples, (1) a phenol-acetaldehyde resin is treated with tung oil and the product is dissolved in a suitable solvent such as benzol, toluol or solvent naphtha with the addition of a drier such as cobalt linoleate or a methylene-containing agent such as hexamethylenetetramine.  (2) A phenol-acetaldehyde resin is heated with linseed oil giving a product which may be incorporated with fibrous material, hardeners, lubricants and colouring matters or dissolved in suitable solvents.  (3) Phenol, paraldehyde, tung oil and hydrochloric acid are heated.  (4) The product of treating a phenol-acetaldehyde resin with tung oil is mixed with wood meal and hexamethylenetetramine, lubricants, colouring matters and plasticizers being added if desired to give a mouldable mixture. The fibrous filler, instead of being in the loose form, such as wood meal, paper pulp, or asbestos fibres, may be in sheet form such as paper, woven textile fabric or sheet asbestos and in such cases the binder is preferably used in solution.  The impregnated sheets may be dried and heat-hardened or several sheets superimposed and subjected to heat and pressure.  Specification 169,347, [Class 2 (iii), Dyes &c.], is referred to.ALSO:A resinous product formed by heating a phenol-acetaldehyde condensation product or the components thereof with a fatty oil such as linseed oil or tung oil, which is soluble in the usual hydrocarbon solvents or mixtures of benzol or xylol and alcohol, is used as a varnish with or without the addition of a hardening agent such as hexamethylenetetramine or driers such as cobalt linoleate.  In examples (1) a phenol-acetaldehyde resin treated with tung oil is dissolved in a suitable solvent such as benzol, toluol or solvent naphtha with the addition of a drier such as cobalt linoleate or a methylene-containing agent such as hexamethylenetetramine.  (2) A phenol-acetaldehyde resin treated with linseed oil may be dissolved in suitable solvents. Specification 169,347, [Class 2 (iii), Dyes &c.], is referred to.ALSO:A resinous product prepared by heating a phenol-acetaldehyde condensation product or ingredients capable of forming such a product with a fatty oil as linseed or tung oil with the addition of a hardening-agent such as hexamethylenetetramine is used as a binding agent for mouldable compositions.  In an example the product of heating a phenol-acetaldehyde resin with tung oil is mixed with wood meal and hexamethylenetetramine, lubricants, colouring matters and plasticizers being added if desired, to yield a mouldable mixture. Other fillers mentioned are paper pulp and asbestos fibres. Specification 169,347, [Class 2 (iii), Dyes &c.], is referred to.