US 12,187,911 B2
Method for preparing water-soluble acrylic-modified phenolic-modified epoxy resin, water-soluble acrylic-modified phenolic-modified epoxy resin prepared thereby, and aqueous coating composition comprising same
Myeng Chan Hong, Gunpo-si (KR); Woo Jin Sohn, Seoul (KR); and Jung Goo Park, Incheon (KR)
Assigned to SAMHWA PAINTS INDUSTRIES CO., LTD., Ansan-Si (KR)
Appl. No. 17/754,888
Filed by SAMHWA PAINTS INDUSTRIES CO., LTD., Ansan-si (KR)
PCT Filed Oct. 8, 2020, PCT No. PCT/KR2020/013819
§ 371(c)(1), (2) Date Apr. 14, 2022,
PCT Pub. No. WO2021/075800, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 10-2019-0127859 (KR), filed on Oct. 15, 2019.
Prior Publication US 2024/0117213 A1, Apr. 11, 2024
Int. Cl. C09D 163/00 (2006.01); B65D 65/42 (2006.01); C08F 220/06 (2006.01); C08G 59/06 (2006.01); C08G 59/14 (2006.01)
CPC C09D 163/00 (2013.01) [B65D 65/42 (2013.01); C08F 220/06 (2013.01); C08G 59/06 (2013.01); C08G 59/14 (2013.01); C08G 2150/90 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A preparation method of a water-soluble acryl-modified phenolic-modified epoxy resin comprising:
(Step 1) preparing an acrylic resin by copolymerizing 40 to 60 wt % of a (meth)acrylic acid monomer, 5 to 20 wt % of a methyl methacrylate monomer, 5 to 20 wt % of a butyl acrylate monomer and 10 to 30 wt % of a styrenic monomer in the presence of an initiator at 70 to 130° C. for 1.5 hours to 3.5 hours;
(Step 2) preparing a phenolic-modified epoxy resin by ring-opening reacting a bisphenol A-type epoxy resin with a phenolic compound in the presence of a catalyst;
(Step 3) preparing an acryl-modified phenolic-modified epoxy resin by ester-reacting the acrylic resin and the phenolic-modified epoxy resin in the presence of a basic catalyst; and
(Step 4) preparing a water-soluble acryl-modified phenolic-modified epoxy resin by water-solubilizing the acryl-modified phenolic-modified epoxy resin.