Patent · US Expired

Copolymers and their use as drift control agents

US6391962B1 · kind B1 · utility

9Cited by

5References

1Claims

0Family size

Assignee

Clariant Corporation · DE

Inventors

Ralf Zerrer · Karlstein, DE
Rainer Kupfer · Hattersheim, DE

Key dates

Filing date	Feb 15, 2001
Grant date	May 21, 2002
Priority date	—
Expiry date	Feb 15, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F220/585
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

What is claimed are copolymers consisting essentially of from 1 to 90% by weight of the repetitive structural unit of the formula (1) in which R1 is hydrogen or methyl, Z is a C1-C4-alkylene group and X is hydrogen, an alkali metal or ammonium, from 10 to 99% by weight of a repetitive structural unit which is derived from olefinically unsaturated comonomers containing at least one oxygen, nitrogen, sulfur or phosphorus atom and from 0 to 20% by weight of crosslinking structures originating from monomers having at least two olefinic double bonds.These copolymers are suitable for use as drift control agents for crop protection compositions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.