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公开(公告)号：US4296007A
公开(公告)日：1981-10-20
申请号：US134591
申请日：1980-03-27
摘要： Handling problems of cadmium curing agents are minimized by adding to a nitrile rubber latex an antioxidant in the form of a soluble alkali metal salt to form a modified latex and then coagulating the modified latex with a cadmium salt to form nitrile rubber containing bound antioxidant in the form of a cadmium compound. Alternately, a concentrate containing a large proportion of the antioxidant in the form of a cadmium compound is prepared which can be subsequently added to a nitrile latex to provide the cadmate cure function.
摘要翻译： 通过向腈橡胶胶乳中添加可溶性碱金属盐形式的抗氧化剂以形成改性胶乳，然后用镉盐使改性胶乳凝结，形成含有结合的抗氧化剂的丁腈橡胶，使镉固化剂的处理问题最小化 形式的镉化合物。 或者，制备含有大量镉化合物形式的抗氧化剂的浓缩物，其随后可以加入到腈胶乳中以提供钙质固化功能。
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公开(公告)号：US6060553A
公开(公告)日：2000-05-09
申请号：US954472
申请日：1997-10-20
IPC分类号： C08J3/16 , B29B13/00 , C08C4/00 , C08J3/12 , C08L21/02 , C08J3/00 , C08K3/20 , C08K9/00 , C08L75/00
CPC分类号： C08J3/124 , C08J2321/00 , Y10T428/29 , Y10T428/2998
摘要： Elastomeric particles, which have a tendency to agglomerate, are rendered non-agglomerating by contacting those particles with an aqueous solution or dispersion of a polyurethane rubber, a high Mooney viscosity, high gel content rubber and/or a soap, and optionally a polar binder, separating the coated elastomeric particles from the solution or dispersion, and then drying the elastomeric particles while keeping the coated particles in motion.
摘要翻译： 具有聚集倾向的弹性体颗粒通过使这些颗粒与聚氨酯橡胶，高门尼粘度，高凝胶含量橡胶和/或皂以及任选的极性粘合剂的水溶液或分散体接触而变得非附聚 将涂覆的弹性体颗粒与溶液或分散体分离，然后在保持涂覆的颗粒运动的同时干燥弹性体颗粒。
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公开(公告)号：US4920176A
公开(公告)日：1990-04-24
申请号：US279680
申请日：1988-12-05
IPC分类号： C08K9/04 , C08C1/15 , C08K9/00 , C08L9/04 , C08L21/02 , C09D7/12 , C09D109/04 , C09J109/02 , C09J109/04 , C09J121/00 , H01B3/28
CPC分类号： C08C1/15 , C09J109/02
摘要： Nitrile rubber emulsion latexes containing anionic emulsifying aids such as surfactants are treated with large amounts of cationic polymeric coagulants to form innocuous water insoluble residues. The polymeric coagulants chemically react with the anionic emulsifying aids by forming polymer adducts whereby the adducts are physically maintained in the nitrile rubber. The need for complete or thorough washing steps, which is generally tedious, expensive, and commercially impractical, is thus reduced or eliminated. Moreover, the dried latex particles have been found to have improved properties such as water resistance, adhesion, and the like.
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公开(公告)号：US4207218A
公开(公告)日：1980-06-10
申请号：US890726
申请日：1978-03-27
CPC分类号： B29B15/026
摘要： Particulate rubber is intimately and uniformly coated with an anti-cake(s) and pressed at mild temperatures to form friable rubber bales. The bales have a bulk density from about 1.3 to about two times that of the original particulate rubber and are capable of being handled as a slab and of supporting a direct load, yet break down under shear to form particles substantially similar in size and distribution to that of the original particulate rubber.
摘要翻译： 颗粒状橡胶紧密均匀地涂有抗滤饼，并在温和的温度下压制以形成脆性橡胶包。 该捆的堆积密度为原始颗粒状橡胶的约1.3倍至约2倍，并且能够作为板坯处理并支撑直接载荷，而在剪切下分解，形成尺寸基本相似的颗粒和分布至 原始颗粒橡胶的。
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公开(公告)号：US4383108A
公开(公告)日：1983-05-10
申请号：US288226
申请日：1981-07-29
CPC分类号： C08C1/15
摘要： 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 Al 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.
摘要翻译： 公开了一种生产丁二烯橡胶，特别是NBR的简单经济方法，其干粉形式不含外来材料，影响其在橡胶制品制造中的应用。 该方法包括以常规方式制备胶乳形式的丁二烯橡胶，但使用十二烷基硫酸钠或等同物作为乳化剂，然后用硫酸镁和硫酸铝的组合或其等同物以与Mg的摩尔比 Al为0.3〜1〜2比例。所得到的凝块湿饼含有粉末粒径的橡胶，干燥后得到干燥的自由流动的橡胶粉，优选在加入硬脂酸锌或其等同物之后 防粉剂，防止粉末粒子在干燥时的团聚。 硬脂酸锌可以作为干粉或湿糊剂加入到湿滤饼中或原地制备。
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公开(公告)号：US4375533A
公开(公告)日：1983-03-01
申请号：US281535
申请日：1981-07-08
摘要： A method for polymerizing olefinically unsaturated carboxylic acids containing at least one activated carbon to carbon olefinic double bond and at least one carboxyl group in an organic media in which said carboxylic acid is at least partially soluble, and a nonsolvent for the polymers of said carboxylic acid, in the presence of a free radical forming catalyst and a surface active agent having an HLB value in the range of less than 10.
摘要翻译： 在所述羧酸至少部分可溶的有机介质中聚合含有至少一个活性碳与碳烯属双键和至少一个羧基的烯属不饱和羧酸的方法，以及所述羧酸的聚合物的非溶剂 在自由基形成催化剂和HLB值在小于10的范围内的表面活性剂的存在下进行。
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