초록

The enhanced biodegradable lubricating grease may also contain (D) a viscosity modifier, (E) a pour point depressant, or mixtures of (D) and (E).

대표청구항 ▼

[ What is claimed is:] [1.] An environmentally friendly lubricating grease, comprising;(A) a natural base oil wherein the natural oil is a genetically modified vegetable oil triglyceride of the formula [ STR 21 ] wherein R.sup.1, R.sup.2 and R.sup.3 are aliphatic groups that contain from about 7 to

[ What is claimed is:] [1.] An environmentally friendly lubricating grease, comprising;(A) a natural base oil wherein the natural oil is a genetically modified vegetable oil triglyceride of the formula [ STR 21 ] wherein R.sup.1, R.sup.2 and R.sup.3 are aliphatic groups that contain from about 7 to about 23 carbon atoms and have a monounsaturated character of at least 60 percent;(B) at least one performance additive comprising(1) an alkyl phenol of the formula [ STR 22 ] wherein R.sup.4 is an alkyl group containing from 1 up to about 24 carbon atoms and a is an integer of from 1 up to 5;(2) a benzotriazole of the formula [ STR 23 ] wherein R.sup.5 is hydrogen or an alkyl group of 1 up to about 24 carbon atoms; or(3) an aromatic amine of the formula [ STR 24 ] wherein R.sup.6 is [ STR 25 ] and R.sup.7 and R.sup.8 are independently a hydrogen or an alkyl group containing from 1 up to about 24 carbon atoms;(C) a thickener wherein the thickener (C) is a reaction product of (C1) a metal based material and (C2) a carboxylic acid or its ester, wherein the metal based material (C1) comprises a metal oxide, metal hydroxide, metal carbonate or metal bicarbonate, wherein the metal is an alkali or alkaline earth metal and wherein the carboxylic acid or its ester (C2) is of the formula R.sup.18 (COOR.sup.19).sub.n wherein R.sup.18 is an aliphatic group that contains from 4 to about 29 carbon atoms, R.sup.19 is hydrogen or an aliphatic group that contains from 1 to 4 carbon atoms and n is an integer of from 1 to 4 and(D) a viscosity modifier wherein the viscosity modifier (D) is 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.