申请人:The B.F. GOODRICH Company
公开号:EP0071240A1
公开(公告)日:1983-02-09
There is disclosed a simple economical method of producing butadiene rubber, particularly NBR, in dry powder form free of extraneous material influencing its utility in rubber products manufacture. The method consists of preparing the butadiene rubber in latex form in the usual manner but using sodium lauryl sulfate or equivalent as emulsifier and then coagulating the latex with a combination of magnesium sulfate and aluminum sulfate, or their equivalents, in a molar ratio of Mg to AI in the range of 0.3 to 1 to 2 to 1. The coagulum wet cake obtained contains powder size particles of the rubber and is dried to give a dry free-flowing rubber powder, preferably after addition of zinc stearate or equivalent which functions as an anticake agent and prevents agglomeration of the powder size particles during drying. The zinc stearate can be added to the wet cake as dry powder or as a wet paste or produced in situ.
公开了一种生产干粉形式丁二烯橡胶(特别是丁腈橡胶)的简单经济方法,该方法不含影响其在橡胶制品生产中用途的无关物质。该方法包括按常规方法制备胶乳形式的丁二烯橡胶,但使用十二烷基硫酸钠或同等物质作为乳化剂,然后用硫酸镁和硫酸铝或其同等物质的组合凝固胶乳,镁与 AI 的摩尔比范围为 0.3 至 1 至 2 至 1。得到的凝固湿饼含有粉末大小的橡胶颗粒,干燥后可得到自由流动的干橡胶粉,最好在加入硬脂酸锌或同等物质后进行干燥。硬脂酸锌可以干粉、湿浆或就地生产的形式添加到湿饼中。