丙烯海松酸酯改性水性聚氨酯乳液及性能的研究

以松香和丙烯酸为原料，经Diels—Alder加成反应制备丙烯海松酸（RA）；RA与新戊二醇经缩聚反应制备端羟基丙烯海松酸新戊二醇酯（ANGE）。以ANGE、异佛尔酮二异氰酸酯（IPDI）、聚酯二元醇（PBA）和二羟甲基丙酸（DMPA）为主要原料，通过顸聚体法制备了固含量为33％～35％的ANGE改性水性聚氨酯乳液（WPUA）。讨论了ANGE含量（N）、R值（-NCO／—OH的物质的量比）及DMPA含量对WPUA乳液及胶膜性能的影响。试验结果表明：当N〈3／4时，可以制备稳定的WPUA乳液，且随着ANGE含量的增加，WPUA胶膜的力争陛能及耐7KI}生明显提高；当R=1．8，DMPA含量为5％时．WPUA乳液及胶膜的综合性能较好。

Synthesis and Performance of New Waterborne Polyurethane Modified by Acrylpimaric Acid Neopentyl Glycol Ester

Hydroxyl-terminated acrylpimaric acid neopentyl glycol ester （ANGE） was synthesized through condensation reaction between neopentyl glycol and acrylpimaric acid （RA） which was synthesized through Diels- Alder addition with rosin and acrylic acid. Prepolymerization of ANGE, isophorone diisocyanate （IPDI）, polyester diol （PBA） and dimethyM propionic acid （DMPA） gave a new waterborne polyurethane emulsion （WPUA） with 33%- 35% solid content. The influence of ANGE content （hydroxyl radical molar ration of ANGE to total of ANGE and PBA）, R value （namely molar ration of --NCO to --OH） and DMPA content on properties of WPUA emulsion and film was discussed. The experiment results showed that the stable WPUA emulsion was synthesized successfully when ANGE content was below 3/4, and WPUA film had better mechanical properties and water resistance with increasing the content of ANGE; WPUA had better emulsion and film properties when mass fraction of DMPA was 5% and R value was 1.8.