Method for Preparing Aqueous Polyacrylate Modified Polyurethane Dispersions & Method for Preparing Waterborne Self-Crosslinkable Polyacrylate-Polyurethane Hybrid Dispersion
A novel method for the preparation of an aqueous polyacrylate modified polyurethane dispersion is disclosed. The preparation method includes three main steps: a) preparation of polyacrylate polymer or copolymer emulsion; b) preparation of polyurethane prepolymer with carboxylic groups and neutralization treatment to the carboxylic groups; and c) dispersion and chain-extension of polyurethane prepolymer by adding the polyacrylate emulsion into the polyurethane prepolymer under vigorous agitation, or other mechanical operation. The aqueous polyacrylate modified polyurethane dispersion has self-crosslinkability when an unsaturated acetoacetoxy compound is used for the preparation of the polyacrylate emulsion.
Countries or Regions:
USA, Hong Kong, China
Invention Code:
TTC.PA.354 & TTC.PA.371
Contact Us:
okt@ust.hk
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Specification:
Category:
TAP - Advanced Materials
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