Poly(meth)acrylamides

US5374688A · kind A · utility

Assignee

• BASF SE

Inventors

• Siegmund Besecke · Hameln, DE
• Andreas Deckers · Flomborn, DE
• Wolfgang Loth · Bad Dürkheim, DE
• Harald Lauke · Mannheim, DE

Key dates

• Filing date: Dec 21, 1992
• Grant date: Dec 20, 1994
• Expiry date: Dec 21, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/48
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polymer comprising essentially units of formula I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or methyl, and PA1 R.sup.3 is C.sub.4 -C.sub.18 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.6 -C.sub.10 -aryl or C.sub.6 -C.sub.10 -aryl-C.sub.1 -C.sub.4 -alkyl, each of which except for the C.sub.4 -C.sub.18 -alkyl may be monosubstituted, disubstituted or trisubstituted by radicals selected from the group consisting of C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and halogen, and having a carboxyl and anhydride group content of equal to or less than 0.40 equivalent per kilogram of polymer and an inherent color (measured as yellowness index) of equal to or less than 2.0, is obtainable by reacting a polymer based on C.sub.1 -C.sub.20 -alkyl esters of (meth)acrylic acid with a primary amine of the general formula II EQU R.sup.3 NH.sub.2 II by removing the alcohol that forms during the reaction from the reaction mixture.