Curable system of self-emulsified aqueous epoxy resin and its polymeric hybrids
學年 88
學期 1
專利開始日期 1999-10-29
專利結束日期 1999-10-29
作品名稱 Curable system of self-emulsified aqueous epoxy resin and its polymeric hybrids
作品名稱（其他語言）
著者 Chen, Tsorng-wen; Yeh, Jen-taut; Chen, Kan-nan; Lin, Yun-shan
單位 淡江大學化學學系
著錄名稱、卷期、頁數
描述 專利國別：美國 United States Patent: 6,291,554 Application number: 09/430,055 國際分類號：C08G 59/42; C08L 63/00; C08L 79/00; C08L 79/02 ; C08G 59/00; C08K 003/20; C08L 063/02
摘要 Disclosed is an anionic, self-emulsified aqueous epoxy resin dispersion prepared through the semi-esterification reaction between a dicarboxylic acid anhydride and the secondary hydroxy group of an epoxy resin, followed by neutralization of the carboxylic acid thus introduced into the epoxy resin with a tertiary amine and then adding only water, without the need of any emulsifier, to the resulting hydrophilic amine salt of the carboxylic acid. The stable aqueous epoxy resin contains both carboxyl and epoxy groups which are reactive functional groups. Also disclosed is a "single-pack" curable aqueous epoxy resin system "cross-linkable" at normal temperature prepared by adding a compound containing polyaziridine as a cross-linking agent into the aqueous epoxy resin dispersion. Upon drying, the liberated carboxyl group in the aqueous epoxy resin reacts with the polyaziridine to form an amino ester via a ring opening reaction. The amino group further reacts with the epoxy group of the epoxy resin to run another cross linking reaction to complete a "double cross-linking". The novel double cross-linking process according to the present invention also can be used in a hybrid resin obtained by blending the aqueous epoxy resin dispersion and other carboxyl- or epoxy-containing aqueous resins, to cure the hybrid resin.
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語言 en
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