Matted polyamide-pud
AssigneeLubrizol Advanced Materials, Inc.
InventorsGabor Erdodi, Naser Pourahmady, Jonathan J. Bird, Israel J. Skoff, Christopher Swech
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Abstract
Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.
Claims23
A colloidally stabilized polymer dispersion in an aqueous medium, said polymer containing a polyamide oligomer and multiple urethane linkages and/or multiple urea linkages, said dispersion in aqueous medium comprising
- a) a polyamide oligomer having amine repeating units selected from
- wherein R1 to R5 are independently selected from H or a C1 to C4 linear or branched alkyl group, wherein the nitrogen terminal groups of said amine repeating units are reacted with reactive carbonyl repeating units having at least one carbonyl group capable of forming an amide linkage;
- b) at least one repeating unit from a polyisocyanate reacted with a hydroxyl or amine group;
- and
- c) a water dispersible group reacted into said polymer containing polyamide and multiple urethane and/or multiple urea linkages;
- further wherein said amine repeating units are a portion of said polymer containing polyamide and multiple urethane and/or urea linkages and said amine repeating units are from about 4 to about 15 wt. % of said polymer containing polyamide and multiple urethane and/or multiple urea linkages;
- further wherein at least one of said amine repeating groups of said polyamide oligomer is connected to repeating units of the formula —(C(═O)—Re—C(═O)— derived from a dicarboxylic in an alternating sequence, wherein Re is a C3 to C48 or 58 linear or branched alkylene group;
- further wherein the polyamide oligomer is further reacted with a cyclic lactone or hydroxycarboxylic acid of 2 to 15 carbon atoms to chain extend the polyamide oligomer with polyester repeating units, wherein said polyester repeating units are from 1 to 75 wt. % of said polymer containing polyamide and multiple urethane linkages and/or urea linkages.
Dependencies are inferred from the claim text.