| abstract |
Oil-soluble polymer improving the viscosity index of lubricating oils, endowed with dispersant properties and capable of lowering the pour point ("pour point depressant"), obtained by means of a first step of reaction between a polyolefinic copolymer and a mixture of C 8 -C 25 alcohol (meth)acrylates and (meth)acrylic acid and a second step of condensation of the so modified copolymer with a polyamine. |