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US 11,299,571 B2Granted
Aqueous polymer composition
AssigneesDow Global Technologies LLC, Rohm and Haas Company
InventorsHan Liu, Junyu Chen, Yaguang Zhao, Xiangting Dong, Qingwei Zhang, Ling Li, Yan Luo, Jintao Liu
Life of this patent
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Abstract
An aqueous polymer composition comprising an acetoacetoxy functional polymer, a metal pyrithione compound, and TEMPO and/or its derivative, showing less yellowing.
Claims8
An aqueous polymer composition, comprising,
- (a) an acetoacetoxy functional polymer, comprising, based on the weight of the polymer, from 0.05% to 10% by weight of structural units of an acetoacetoxy functional monomer,
- (b) a metal pyrithione compound, and
- (c) from 0.005% to 1% by weight of TEMPO and/or a derivative thereof, based on the total weight of the aqueous polymer composition.
A method for reducing yellowing of an aqueous coating composition comprising an acetoacetoxy functional polymer comprising, based on the weight of the polymer, from 0.05% to 10% by weight of structural units of an acetoacetoxy functional monomer, and a metal pyrithione compound, the method comprising a step of:
- adding from 0.005% to 1% by weight of TEMPO and/or a derivative thereof into the aqueous coating composition, based on the total weight of the aqueous coating composition and TEMPO and/or a derivative thereof.
Dependencies are inferred from the claim text.