Method for curing polymers containing one or more carboxy or anhydride functions and compositions
AssigneeRohm and Haas Company
InventorsGraham Swift, Harry J. Cenci
Life of this patent
Estimating the term…
Abstract
.beta.-HYDROXYALKYLAMIDES AND CERTAIN POLYMERS THEREOF ARE DISCLOSED AS CURING AGENTS FOR POLYMERS CONTAINING ONE OR MORE CARBOXY OR ANHYDRIDE FUNCTIONS. Also, self-curing copolymers containing carboxy and .beta.-hydroxyalkylamide functionality are disclosed. The .beta.-hydroxyalkylamides are either known compounds or may be prepared by treating an ester with an appropriately substituted amine. The .beta.-hydroxyalkylamides are effective in solution, aqueous emulsion and powder coating formulations.
Claims24
A method of curing polymers which comprises (1) mixing a polymer containing carboxy groups or carboxylic anhydride groups or salts of said carboxy groups with a .beta.-hydroxyalkyl amide of the formula:
- ##STR6## wherein A is a bond, hydrogen, a monovalent or polyvalent organic radical derived from a saturated or unsaturated alkyl containing from 1 to 60 carbon atoms, aryl, tri-lower alkyleneamino or an ethylenically unsaturated radical;
- R.sup.1 is hydrogen, lower alkyl having 1 to 5 carbon atoms, or hydroxyalkyl having from 1 to 5 carbon atoms;
- R.sup.2 and R.sup.3 are the same or different radicals selected from hydrogen, straight or branched chain lower alkyl having from 1 to 5 carbon atoms, or one of the R.sup.2 and one of the R.sup.3 radicals joined together with the carbon atoms to which they are attached to form cycloalkyl;
- n is an integer of 1 or 2 and n' is an integer of 0 to 2;
- n being 2 when n' is 0;
- and (2) heating the mixture at a temperature of from about 125.degree. to about 400.degree. C. until a cured polymer is obtained.
A method of curing polymers which comprises
- (1) mixing a polymer, containing carboxy groups or carboxylic anhydride groups or salts of said carboxylic groups, with a .beta.-hydroxyalkylamide of the formula:
- ##STR7## wherein m is 0-8;
- R.sup.1 is hydrogen, lower alkyl having 1 to 5 carbon atoms, or hydroxylakyl having from 1 to 5 carbon atoms;
- and R.sup.3 is selected from hydrogen and straight or branched chain lower alkyl having from 1 to 5 carbon atoms, and
- (2) heating the mixture at a temperature of from about 125.degree. to about 400.degree. C., until a cured polymer is obtained.
A curable composition containing a mixture of an addition copolymer of ethylenically unsaturated monomers containing carboxy groups, carboxylic acid salt groups, or carboxylic anhydride groups with a .beta.-hydroxyalkylamide of the formula:
- ##STR9## wherein A is a bond, hydrogen, a monovalent or polyvalent organic radical derived from a saturated or unsaturated alkyl containing from 1 to 60 carbon atoms, aryl, tri-lower alkyleneamino or an unsaturated radical;
- R.sup.1 is hydrogen, lower alkyl having 1 to 5 carbon atoms, or hydroxyalkyl having from 1 to 5 carbon atoms;
- R.sup.2 and R.sup.3 are the same or different radicals selected from hydrogen, straight or branched chain lower alkyl having from 1 to 5 carbon atoms, or one of the R.sup.2 and one of the R.sup.3 radicals joined together with the carbon atoms to which they are attached to form cycloalkyl;
- n is an integer of 1 or 2 and n' is an integer of 0 to 2;
- n being 2 when n' is 0.
A curable composition containing a mixture of (a) an addition copolymer of ethylenically unsaturated monomers containing carboxy groups, carboxylic acid salt groups, or carboxylic anhydride groups with (b) a .beta.-hydroxyalkylamide of the formula:
- ##STR10## wherein m is 0-8;
- R.sup.1 is hydrogen, lower alkyl having 1 to 5 carbon atoms, or hydroxyalkyl having from 1 to 5 carbon atoms;
- and R.sup.3 is selected from hydrogen and straight or branched chain lower alkyl having from 1 to 5 carbon atoms.
Dependencies are inferred from the claim text.