Method for preparing acrylic aqueous dispersion with hydroxyl through two-step polymerization

A technology of hydroxyacrylic acid and polymerization method, used in the field of chemical coatings, can solve the problems of high viscosity, low stability and poor film performance of water dispersion, and achieve the effect of increasing water resistance, reducing viscosity and good film performance.
CN101649098AInactive Publication Date: 2010-02-17ZHEJIANG HUANDA PAINT IND GROUP +1
5 Cites 39 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG HUANDA PAINT IND GROUP
Publication Date
2010-02-17
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention provides a method for preparing acrylic aqueous dispersions with hydroxyl through two-step polymerization and the method comprises the synthesis of hydroxy acrylic resin, the removal ofsolvent, the neutralization and salt-formation and the deionized water dispersion, wherein the synthesis of hydroxy acrylic resin adopts two-step feeding synthesis method instead of one-step feeding method in prior art, the composition of the first added monomer mixture is different from that of the second added monomer mixture and preferentially, the weight percent of the second added hydrophilicmonomer is higher than that of the first added monomer when feeding tends to end up. The aqueous dispersions obtained by the technical solution of the invention reduces the dosage of monomer with hydroxyl so as to increase the water resistance of coating which is formed by combining aqueous dispersions and curing agent, reduce the grain size of dispersions, lower the viscosity and increase the stability obviously.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention relates to the field of chemical coatings, in particular to a method for preparing a hydroxyl-containing acrylic water dispersion by a two-step polymerization method. Background technique

[0002] Since the volatile organic compounds (VOC) of water-based two-component polyurethane coatings are significantly reduced, and the performance is better than or equivalent to that of solvent-based two-component polyurethane coatings, the research and development of water-based two-component polyurethanes has become very active in recent years. For example, using the raw materials provided by Bayer and other suppliers in Germany, paint manufacturers have developed quick-drying water-based polyurethane coatings for woodware. This water-based polyurethane coating has replaced solvent-based polyurethane coatings for high-end wooden office supplies. In addition to low VOC and high decorative properties, this water-based polyurethane coating can meet strict ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More