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发明公开
CN1173530A 含磷酸酯的液压液用粘度指数改进添加剂 失效 - 权利终止

含磷酸酯的液压液用粘度指数改进添加剂
摘要：
公开了由所选的(甲基)丙烯酸烷基酯单体,按一定的重量比得到的聚合物组合物,在磷酸酯航空液压液中有改进的粘度控制和低温性能。用作航空液压液的粘度指数改进添加剂的聚合物组合物含有40—100%(重量)(甲基)丙烯酸(C1－C10)烷基酯和0—60%(重量)(甲基)丙烯酸(C11－C20)烷基酯单体单元。含有40—70%(重量)(甲基)丙烯酸(C1－C10)烷基酯和30—60%(重量)(甲基)丙烯酸(C11－C15)烷基酯的优选聚合物组合物使在磷酸酯液压液中良好的溶解性与在低温和高温下良好的粘度控制相结合。
摘要（英）：

Polymer compositions derived from selected alkyl (meth)acrylate ester monomers used in certain weight ratios to provide improved viscosity control and low temperature performance characteristics in phosphate ester aircraft hydraulic fluids is disclosed. Polymer compositions for use as viscosity index improving additives in aircraft hydraulic fluids contain from 40 to 100 weight percent (C1-C10)alkyl (meth)acrylate and zero to 60 weight percent (C11-C20)alkyl (meth)acrylate monomer units. Preferred polymer compositions based on 40 to 70 weight percent (C1-C10)alkyl (meth)acrylate and 30 to 60 weight percent (C11-C15)alkyl (meth)acrylate monomer units combine good solubility in the phosphate ester hydraulic fluids with good viscosity control at low and high temperatures.

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