EP 0794995 A1 19970917 - POLYMER BLENDS CONTAINING OLEFIN COPOLYMERS AND STAR BRANCHED POLYMERS
Title (en)
POLYMER BLENDS CONTAINING OLEFIN COPOLYMERS AND STAR BRANCHED POLYMERS
Title (de)
POLYMER-MISCHUNGEN WELCHE OLEFIN-KOPOLYMEREN UND STERNFÖRMIGE POLYMEREN ENTHALTEN
Title (fr)
MELANGES POLYMERES CONTENANT DES COPOLYMERES D'OLEFINES ET DES POLYMERES RAMIFIES EN ETOILE
Publication
Application
Priority
- US 9515707 W 19951204
- US 34845594 A 19941202
Abstract (en)
[origin: WO9617041A1] This invention relates to novel polymer blends used as additives and which improve the viscosity index of lubricating oils. Specifically, the polymer additive compositions comprise partially crystalline olefin copolymers (OCP) such as EPM (ethylene-propylene cpolymer) or EPDM (ethylene-propylene diene terpolymer) and star styrene isoprene polymers or amorphous OCPs such as EPM or EPDM and star styrene/isoprene based polymers or crystalline and amorphous olefin copolymers with star styrene/isoprene based polymers. The additive compositions disclosed are particularly useful for preparing solid polymers with excellent dimensional stability. These polymer blends when dissolved in mineral oils comprise lubricant additives which improve the viscosity index and low temperature properties of lubricating oil compositions. Blends of crystalline and amorphous EPM or EPDM with attached polar functional groups and star polymers are also useful as additives. These materials have multifunctional performance properties and are referred to as dispersant or dispersant/antioxidant olefin copolymers.
IPC 1-7
IPC 8 full level
C08L 23/16 (2006.01); C10M 157/00 (2006.01); C10M 157/04 (2006.01)
CPC (source: EP)
C08L 23/16 (2013.01); C10M 143/00 (2013.01); C10M 143/02 (2013.01); C10M 143/10 (2013.01); C10M 143/12 (2013.01); C10M 143/14 (2013.01); C10M 149/06 (2013.01); C10M 149/10 (2013.01); C10M 157/00 (2013.01); C10M 157/04 (2013.01); C10M 2205/00 (2013.01); C10M 2205/02 (2013.01); C10M 2205/022 (2013.01); C10M 2205/04 (2013.01); C10M 2205/06 (2013.01); C10M 2205/08 (2013.01); C10M 2217/024 (2013.01); C10M 2217/028 (2013.01); C10M 2217/06 (2013.01); C10N 2040/25 (2013.01); C10N 2040/251 (2020.05); C10N 2040/252 (2020.05); C10N 2040/253 (2020.05); C10N 2040/255 (2020.05); C10N 2040/28 (2013.01); C10N 2070/02 (2020.05)
Citation (search report)
See references of WO 9617041A1
Designated contracting state (EPC)
BE GB
DOCDB simple family (publication)
WO 9617041 A1 19960606; AU 4507296 A 19960619; EP 0794995 A1 19970917
DOCDB simple family (application)
US 9515707 W 19951204; AU 4507296 A 19951204; EP 95943653 A 19951204