Patent GB-1007163-A (GB)
Title: Process for the production of hardenable products by polyesterification
IPC: C09D191/00
Filed: 1962-04-09
Abstract: A composition, which is convertible to an insoluble state by polyesterification, comprises a solution in a solvent (other than an organic primary hydroxy compound) of a mixture of or the partial inter-esterification product of (I) an addition compound, which may be polymeric, produced by the substantially complete reaction of 1 part by weight of maleic anhydride with 3-6 parts by weight of an unsaturated oil fatty acid containing non-conjugated double bonds or only one pair of conjugated double bonds, or of a hydroxyl-free ester of such an acid, said addition compound containing at least three ester-forming groups in the form of free carboxyl groups or free anhydride groups, and (II) a primary hydroxy compound having more than two primary hydroxyl groups (or a mixture thereof with a dihydroxy compound having two primary hydroxyl groups), or a resol or aminoplast having at least two primary hydroxyl groups. The composition may also contain, as a catalyst for the polyesterification, a tertiary amine, a quaternary ammonium compound, or a soap of an alkali metal, an alkaline earth metal, zinc or lead. Suitable fatty acids for making J are those derived from aline, soyabean, isomerized soyabean, linseed, tall or dehydrated castor oil.  Suitable esters of these acids are the glycerol and pentacrythritol esters and hydroxyl free alkyd resin (e.g. made by reacting phthalic, anhydride, hexanetriol, isomerized soyabean oil and coconut oil). In making the esters, the unsaturated acids may be mixed with other acids (e.g. resin, coconut oil fatty acid, adipic acid or phthalic acid).  Suitable polyhydric compounds for component II are (a) glycerine, sorbitol, trimethylol alkanes, pentaerythritol, tetramethylol cyclohexanol and triethanolamine or mixtures thereof with ethylene glycol or diethanolamine; (b) di- or higher polymethylol derivatives of phenols (e.g. phenol, cresols, p-tertiary butylphenol or p-diisobutyl phenol), urea, thiourea or melamine; (c) derivatives or (h) in which hydroxyl groups are etherified (e.g. with the monoisopropyl ether of ethylene glycol, trimethylol ethane, or a mixture of butanol and trimethylol propane); (d) partially condensed derivatives of (h) or (c); and (e) alkyd resins containing free hydroxyl groups (e.g. a condensate of phthalic anhydride, pentaerythritol and linseed oil, a condensate of isophthalic acid, trimethylol propane and pentaerythritol, a condensate of imphthalic acid, adipic acid, trimellitic acid and pentaerythritol, or a condensate of maleic anhydride, pentaerythritol and Chinawood oil). The solvent may be a hydrocarbon, ketone, ester, ether or tertiary alcohol.  The solvent may also be water (possibly in admixture with an organic solvent) in which case the addition compound I is saponified with a base (e.g. ammonia or an amine) and the polyhydroxy compound II, if insoluble in water (e.g. if it is an alkyd resin) is also saponified.  Before saponification, the anhydride groups in I may be hydrolysed (preferably in the presence of a tertiary amine) or may be partially reacted with methanol.  The composition may be used in the manufacture of vehicles for paints or impregnating agent or as adhesives and may either be cured at room temperature or may be stored.