NOVEL FLUORINATED POLYACRYLATES ANTIFOAMS IN ULTRA-LOW VISCOSITY (<5 CST) finished fluids

There is disclosed an antifoam component for a mechanical device which includes a poly(acrylate) copolymer. The antifoam component has improved foam performance in finished fluids utilizing dibutyl hydrogen phosphite compounds, such as driveline fluids. A lubricating composition comprising a) at least one oil of lubricating viscosity; and b) an antifoam component comprising a poly(acrylate) copolymer. The poly(acrylate) copolymer, b) may include (i) from about 30 wt% up to about 99 wt% of a (meth)acrylate monomer having C1 to C4 alkyl esters of (meth)acrylic acid; and (ii) from about 1 wt% upto about 70 wt% of a fluorinated (meth)acrylate monomer. 公开了一种用于机械装置的消泡剂组分，所述消泡剂组分包含聚(丙烯酸酯)共聚物。所述消泡剂组分在利用亚磷酸氢二丁酯化合物的成品流体，如动力传动系统流体中具有改善的泡沫性能。一种润滑组合物，其包括：a)至少一种具有润滑粘度的油；以及b)消泡剂组分，所述消泡剂组分包括聚(丙烯酸酯)共聚物。所述聚(丙烯酸酯)共聚物b)可以包含(i)约30wt％直到约99wt％的(甲基)丙烯酸酯单体，所述(甲基)丙烯酸酯单体具有(甲基)丙烯酸的C1到C4烷基酯；以及(ii)约1wt％直到约70wt％的氟化(甲基)丙烯酸酯单体。