木器涂料用苯丙乳液最低成膜温度的研究

Study on Minimum Film-forming Temperature of Styrene-acrylic Emulsion for Wood Coatings

针对木器涂料用核-壳型苯丙乳液,研究了壳层玻璃化转变温度(T_g)、核壳质量比、交联单体三方面因素对乳液最低成膜温度(MFT)的影响,以及成膜助剂二丙二醇丁醚(DPNB)、二丙二醇甲醚(DPM)的使用效果。研究发现,壳层T_g降低能有效降低MFT,并强化DPNB+DPM的使用效果,核壳质量比能大幅度影响MFT;交联会使乳液MFT大幅上升,但双丙酮丙烯酰胺(DAAM)-己二酰肼(ADH)交联型乳液对DPNB+DPM的响应良好,同等添加量时等于或优于非交联乳液。

Aiming at core-shell styrene-acrylic emulsion for wood coatings, the dissertation studied the effect of shell glass- transition temperature （Tg）, core-shell mass ratio and crosslinking monomer on minimum film-forming temperature （MFT） of emulsion and the application effects of the film-forming additives [dipropylene glycol butyl ether （DPNB） and Dipropylene glycol methyl ether （DPM）]. It has been found that： reduction of shell Tg could effectively lower MFT and strengthen application effect of DPNB＋DPM, and raass ratio of shell could largely influence MFT; crosslinking might lead to sharp rise of MFT, but the emulsion crosslinked with diacetone acrylamide （DAAM）-adipic dihydrazide （ADH） had good response for DPNB＋DPM and was equal or superior to non-crosslinking emulsion in case of the same addition level.