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公开(公告)号：US4623713A
公开(公告)日：1986-11-18
申请号：US754554
申请日：1985-07-15
申请人： Robert T. Beinor , William M. Cole
发明人： Robert T. Beinor , William M. Cole
CPC分类号： C08C2/00 , Y10S528/933
摘要： A method and composition are disclosed wherein guayule rubber is fractionated into desirable weight average molecular weight fractions by a desired solvent system. Oftentime, a plurality of fractionating steps is utilized wherein the desirable molecular weight rubber fraction is precipitated or extracted. High weight average molecular weight rubbers having usually less than 4% by weight of resin content therein are generally desirable because of their favorable physical properties.
摘要翻译： 公开了一种方法和组合物，其中通过所需溶剂系统将瓜耳胶橡胶分级成所需的重均分子量级分。 通常，使用多个分馏步骤，其中所需的分子量橡胶级分沉淀或萃取。 通常由于其有利的物理性质，通常期望具有通常小于4重量％的树脂含量的高重均分子量橡胶。
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公开(公告)号：US4829117A
公开(公告)日：1989-05-09
申请号：US65240
申请日：1987-06-22
CPC分类号： C08J3/2053 , C08K5/005 , C08K5/13 , C08K9/12 , C08J2307/00 , Y10S528/93
摘要： A stabilizing composition and process for guayule type rubbers which can be directly applied to guayule-type plants or shrubs before processing thereof, or to guayule-type rubber miscella, rubber-resin miscella, etc., contains a volatile low melting point antioxidant which is either liquid or solid and an optional liquid inert carrier which lowers the melting point of the antioxidant. Since antioxidants are generally expensive, recovery thereof as by distillation is aided through the utilization of low boiling point antioxidants.
摘要翻译： 可以在加工前直接施用于瓜耳类植物或灌木的花岗蛋白型橡胶的稳定化组合物和方法，或花岗质型橡胶树脂，橡胶树脂miscella等含有挥发性低熔点抗氧化剂，其为 液体或固体以及可选的液体惰性载体，降低抗氧化剂的熔点。 由于抗氧化剂通常是昂贵的，因此通过利用低沸点抗氧化剂来辅助通过蒸馏的回收。
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