Mobil Oil Corporation

The Valspar Corporation

Conrad L Lynch

Michael A Tobias

The production of novel polyester resins is disclosed as is the preparation of high solids coatings and paints containing the same. The polyester resins are produced by reacting a mixture comprising:

High solids, high heat resistant polyester resins and coating

Thermosetting polyesters and their preparation comprising diol, triol, benzenedicarboxylic acid and, as an essential ingredient are disclosed, as well as coating compositions containing those polyesters with cross-linking agents such as aminoplast.

Thermosettable polyester resin compositions containing caprolactone

This invention provides a linear thermosettable polyester based upon 10-20 weight percent cyclohexanedimethanol, 10-16 weight percent adipic acid, 12-16 weight percent neopentyl glycol, 12-16 weight percent propylene glycol or butanediol, and 40-48 weight percent isophthalic acid component.

Polyester coil coating

There are disclosed thermosettable polyester resins which are the reaction products of specified amounts of a benzenedicarboxylic acid component (e.g.: 1,3-benzenedicarboxylic acid), a trihydroxy alkyl component (e.g.: 2-ethyl-2-(hydroxymethyl)-1,3-propanediol), a short chain alkylene diol component having four or fewer carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 2,2-dimethyl-1,3-propanediol), a dihydroxy alkyl constituent having four to ten carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 1,6-hexanediol), and optionally, an alkyl dicarboxylic acid component (e.g.: 1,6-hexanedioic acid). Such polyesters, having a number average molecular weight of from about 400 to about 1400, a combined acid and hydroxyl number of about 50 to about 250 milligrams of KOH per gram of polyester, and a glass transition temperature of about -15.degree. to +25.degree. C., are found to be especially useful in high solids content coating formulations.

Thermosettable polyester resin compositions

Linear thermosettable polyester resin compositions are prepared from benzenedicarboxylic acid, an alkyl dicarboxylic acid, (e.g. 1,6-hexanedioic acid), and a short chain alkylene diol component (e.g. 2,2-dimethyl-1,3-propanediol), the resin having a number average molecular weight of about 1,500 to about 5,000 and combined acid and hydroxyl values of about 20 to about 60 mg of KOH per gram of polyester. When these polyesters are combined with an aminoplast and an acid catalyst they form coating compositions which, when applied to a substrate and cured, provide a coating having an outstanding combination of hardness, adhesion, extendability, flexibility and dry heat resistance.

Linear polyester coil coating compositions

Linear polyester resins, terminated with carboxyl groups, and suitable for inclusion in heat-curable fluid coating compositions, are advantageously modified by capping a minor fraction of the carboxyl groups with a hydrocarbyl glycidyl ether. The capped resins produce water-reducible formulations that exhibit a fast curing rate and excellent adhesion when formulated with hexamethoxymethylmelamine, for example. Such fluid coating compositions may be used as industrial coatings and coil-coatings.

Fast-curing coating compositions

There are provided linear polyesters of 1,6-hexanediol, short chain alkylene glycol, a phthalic acid, and optionally adipic acid. These polyesters are combined with an aminoplast and acid catalyst to form coating compositions which, when applied to a substrate and baked, provide a coating having an outstanding combination of flexibility, hardness, adhesion, extendability, dry heat resistance, weather resistance, and exterior color fastness.

Growing community of inventors

Edison, NJ, United States of America

Conrad L Lynch