Copolymer with hydrolyzable groups by reacting glycidyl ester and/or ether, polyol and hydrolyzable group-containing compound
AssigneePPG Industries Ohio, Inc.
InventorsJonathan T. Martz, Erick B. Iezzi
Life of this patent
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Abstract
A copolymer and a process of making the copolymer are disclosed. The copolymer is produced from reacting a glycidyl ester and/or ether with a polyol comprising a functionality of at least 2 wherein at least 50% by weight of the copolymer comprises a minimum of 3n+X repeating units, wherein n is a monomer unit and X is a monomer unit and/or other reactant. The copolymer may also include less than 50% of the polymeric units having the same molecular weight. The present invention is further directed to processes for preparing the copolymer and to coating compositions employing the copolymer.
Claims26
A copolymer having a molecular weight distribution greater than 1.10 produced from reacting a glycidyl ester and/or ether with a polyol comprising a functionality of at least 2 wherein the molar ratio of glycidyl ester and/or ether to polyol is at least 3:1 and wherein at least 50% by weight of the copolymer comprises a minimum of 3n+X repeating units, wherein n is the molecular weight of the glycidyl ester and/or ether and X is the molecular weight of the polyol monomer,
- wherein the copolymer comprises hydrolyzable groups.
A process for preparing a copolymer having a molecular weight distribution greater than 1.10 and comprising hydrolyzable groups, the process comprising:
- (a) reacting in a molar ratio of at least 3:1 a glycidyl ester and/or ether with a polyol having a functionality of at least 2 to form a copolymer wherein at least 50% by weight of the copolymer comprises a minimum of 3n+X repeating units, wherein n is the molecular weight of the glycidyl ester and/or ether and X is the molecular weight of the polyol monomer;
- and
- (b) reacting the copolymer produced in (a) with a hydrolyzable functional group containing compound.
Dependencies are inferred from the claim text.