Gradient copolymers, as well as a method for their preparation and their use

US6403745B1 · kind B1 · utility

Assignee

• RohMax Additives GmbH · DE

Inventors

• Markus Scherer · Lebach, DE
• Joseph M. Bollinger · North Wales, US
• Joan Souchik · Northampton, US

Key dates

• Filing date: Nov 30, 1999
• Grant date: Jun 11, 2002
• Expiry date: Nov 30, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/1963
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention concerns gradient copolymers, that are obtainable by polymerizing a mixture of olefinically unsaturated monomers that consist ofa) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R1 means a linear or branched alkyl residue with 1 to 5 carbon atoms, R2 and R3 independently represent hydrogen or a group of the formula —COOR′, where R′ means hydrogen or an alkyl group with 1 to 5 carbon atoms,b) 10 to 98% by weight of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R4 means a linear or branched alkyl residue with 6 to 15 carbon atoms, R5 and R6 independently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 6 to 15 carbon atoms,c) 0 to 80% by weight of one or more ethylenically unsaturated ester compounds of formula (III) where R is hydrogen or methyl, R7 means a linear or branched alkyl residue with 16 to 30 carbon atoms, R8 and R9 independently are hydrogen or a group of the formula —COOR′″ where R′″ means hydrogen or an alkyl group wi…