申请人:Zeon Corporation
公开号:EP3434716A1
公开(公告)日:2019-01-30
The present invention provides a method for producing a latex composition containing a latex of a nitrile rubber containing an α,β-ethylenically unsaturated nitrile monomer unit in a content of 8 to 60 wt%, and having an iodine value of 120 or less, the isothiazoline-based compound represented by the following general formula (1) in a content of 26 ppm by weight or more with respect to the nitrile rubber, and the benzisothiazoline-based compound represented by the following general formula (2) in a content of 26 ppm by weight or more with respect to the nitrile rubber, wherein the method comprises an addition step of adding the isothiazoline-based compound and the benzisothiazoline-based compound to the latex of the nitrile rubber at an addition rate of 2,000 ppm by weight/min or less in terms of the total addition rate of the isothiazoline-based compound and the benzisothiazoline-based compound under the conditions that the latex of the nitrile rubber is in a state at a temperature of 50°C or lower, and the isothiazoline-based compound and the benzisothiazoline-based compound are each in a state of an aqueous solution having a concentration of 0.1 to 40 wt%.
wherein, in the general formula (1), R1 represents a hydrogen atom, or a substituted or unsubstituted organic group, and R2 and R3 each independently represent a hydrogen atom, a halogen atom, or an optionally substituted organic group; and in the general formula (2), R4 represents a hydrogen atom, or a substituted or unsubstituted organic group, R5 each independently represent a hydrogen atom, or an optionally substituted organic group, and "n" represents an integer of 0 to 4.
本发明提供了一种生产胶乳组合物的方法,该胶乳组合物含有丁腈橡胶的胶乳,该丁腈橡胶含有α,β-乙烯基不饱和丁腈单体单元,含量为8至60重量%,碘值为120或以下、以下通式(1)代表的异噻唑啉基化合物相对于丁腈橡胶的含量为 26 ppm 或以上(按重量计),以及以下通式(2)代表的苯并异噻唑啉基化合物相对于丁腈橡胶的含量为 26 ppm 或以上(按重量计)、其中,该方法包括一个添加步骤,将异噻唑啉基化合物和苯并异噻唑啉基化合物以 2、以异噻唑啉基化合物和苯并异噻唑啉基化合物的总添加速率而言,在丁腈橡胶的胶乳处于温度为 50°C 或更低的状态,以及异噻唑啉基化合物和苯并异噻唑啉基化合物各自处于浓度为 0.1至40 wt%的水溶液状态。
其中,通式(1)中,R1代表氢原子,或取代或未取代的有机基团,R2和R3各自独立地代表氢原子、卤素原子或任选取代的有机基团;通式(2)中,R4代表氢原子,或取代或未取代的有机基团,R5各自独立地代表氢原子,或任选取代的有机基团,"n "代表0至4的整数。