LOW-VISCOSITY HYDROXYL-TERMINATED RESIN WITH DIISOCYANATE AS NUCLEUS, AND PREPARATION METHOD THEREFOR AND USE THEREOF

WIPO Patent Application WO/2018/126795

A1

Provided are a low-viscosity hydroxyl-terminated resin with diisocyanate as a nucleus, and a preparation method therefor and the use thereof. When prepared: 1 mole of a micromolecular polyol is first modified with 1 to 3 moles of a unit epoxy compound so as to obtain a modified polyol; and then 2 moles of the modified polyol are reacted with 1 to 3 moles of a diisocyanate compound so as to obtain the hydroxyl-terminated resin. The prepared hydroxyl-terminated resin has the advantages of a simple synthesis process, a high solid content and a low viscosity; the hydroxyl value thereof (80% solid mass content) is between 140 to 300 mg KOH/g and a viscosity thereof (80% solid mass content) is 300 to 3000 cp at 25℃. The hydroxyl-terminated resin is capable of crosslinking with a polyurethane curing agent containing an isocyanate group. A prepared high-solid-content dual-component polyurethane coating has a VOC content of less than 380 g/L under the construction viscosity thereof, and the performance of a coated film meets the national standards for solvent-type dual-component polyurethane woodenware coatings in China.

QU JINQING (CN)
HUANG SHAN (CN)
ZHU YAN'AN (CN)
CHEN RONGHUA (CN)

PCT/CN2017/110893

July 12, 2018

November 14, 2017

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UNIV SOUTH CHINA TECH (CN)
CARPOLY CHEMICAL GROUP CO LTD (CN)

C08G18/32; C08G18/48; C08G18/73; C08G18/75; C09D175/04; C09D175/08

CN106632946A	2017-05-10
CN1894299A	2007-01-10
CN103013421A	2013-04-03
CN102887987A	2013-01-23
CN104592483A	2015-05-06
CN103665313A	2014-03-26

GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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