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US 4,377,676 AGranted
Non-precondensed silicone-alkyd resins and a method for their preparation
AssigneeDow Corning Corporation
InventorsLaura A. Gauthier, Gary E. LeGrow
Life of this patent
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Abstract
This invention discloses silicone-alkyd resins and a method for their preparation which overcomes prior art problems in the manufacture of such resins. The method consists of reacting all of the components of the silicone-alkyd resin together essentially simultaneously.
Claims44
A process for producing a resin which comprises contacting and reacting essentially simultaneously
- (A) an aliphatic polyhydric alcohol or a mixture of aliphatic polyhydric alcohols;
- (B) a polybasic carboxylic acid or an anhydride or mixtures thereof;
- (C) an organosilane or a mixture of organosilanes having the general formula
- R.sub.n Si(OR').sub.4-n
- wherein R is selected from a group consisting of phenyl, methyl, ethyl, propyl and butyl radicals;
- R' is an alkyl radical of 1-4 carbon atoms and n has a value of 1 or 2 and,
- (D) at least a stoichiometric amount of water based on the amount of --(OR') present in the mixture, at a temperature greater than 25.degree. C. for a period of time sufficient to produce a resin with an acid value of 10-150.
4 more elements
A water reducible resin composition comprising
- (a) from 20 to 90 parts by weight of a resin which is produced by contacting and reacting essentially simultaneously
- (i) an aliphatic polyhydric alcohol or a mixture of aliphatic polyhydric alcohols:
- (ii) a polybasic carboxylic acid or an anhydride or mixtures thereof;
- (iii) an organosilane or a mixture of organosilanes having the general formula
- R.sub.n Si(OR').sub.4-n
- wherein R is selected from the group consisting of phenyl, methyl, ethyl, propyl and butyl radicals;
- R' is an alkyl radical of 1-4 carbon atoms and n has a value of 1 or 2 and,
- (iv) at least a stoichiometric amount of water based on the amount of --(OR') present in the mixture, at a temperature greater than 25.degree. C. for a period of time sufficient to produce a resin with an acid value of 10-150,
- (b) 80-10 parts by weight of a water-miscible organic solvent selected from a group consisting of aliphatic alcohols, glycols, monoalkyl ethers of glycols and ketones;
- and
- (c) a basic compound selected from the group consisting of trimethylamine, triethylamine, dipropylamine, dimethylethanolamine, diethylethanolamine, triethanolamine and ammonia in an amount sufficient to reduce the acid value of component (a) to below 10.
8 more elements
Dependencies are inferred from the claim text.