A composition is disclosed which comprises
(A) At least one oil comprising a synthetic triglyceride, a natural oil or a derivative of a natural oil;
(B) a hydrogenated block copolymer comprising a normal block copolymer or a random block copolymer, said normal block copolymer made from a vinyl substituted aromatic and an aliphatic conjugated diene, said normal block copolymer having from two to about five polymer blocks with at least one polymer block of said vinyl substituted aromatic and at least one polymer block of said aliphatic conjugated diene, said random block copolymer made from vinyl substituted aromatic and aliphatic conjugated diene monomers, the total amount of said vinyl substituted aromatic blocks in said block copolymer being in the range of from about 20 percent to about 70 percent by weight and the total amount of said diene blocks in said block copolymer being in the range of from about 30 percent to about 80 percent by weight; the number average molecular weight of said normal block copolymer and said random block copolymer being in the range of about 5,000 to about 1,000,000; and
(C) at least one pour point depressant.
In addition to components (A), (B), and (C) the composition may also contain (D) a performance additive
本发明公开了一种组合物,它包括
(A) 至少一种油,包括合成
甘油三酯、天然油或天然油的衍
生物;
(B) 一种氢化嵌段共聚物,包括普通嵌段共聚物或无规嵌段共聚物,所述普通嵌段共聚物由
乙烯基取代芳香族和脂肪族共轭二烯制成,所述普通嵌段共聚物具有 2 至约 5 个聚合物嵌段,其中至少一个聚合物嵌段为所述
乙烯基取代芳香族,至少一个聚合物嵌段为所述脂肪族共轭二烯、所述无规嵌段共聚物由
乙烯基取代芳香族和脂肪族共轭二烯单体制成,所述嵌段共聚物中所述
乙烯基取代芳香族嵌段的总量按重量计在约 20%至约 70%的范围内,所述嵌段共聚物中所述二烯嵌段的总量按重量计在约 30%至约 80%的范围内;所述普通嵌段共聚物和所述无规嵌段共聚物的平均分子量在约 5,000 至约 1,000,000 之间;以及
(C) 至少一种降凝剂。
除成分 (A)、(B) 和 (C) 外,组合物还可包含 (D) 性能添加剂