The effects of different factors on the end-product were studied, the results showed the acid content and the time of second condensation had effects mainly on the softening point of the resin;
研究了各种因素对最终产品的影响，结果表明：加酸量和二次缩合时间主要影响树脂软化点；
The effects of different factors on the end-product were studied, the results showed the acid content and the time of second condensation had effects mainly on the softening point of the resin;
研究了各种因素对最终产品的影响，结果表明：加酸量和二次缩合时间主要影响树脂软化点；
应用推荐