US 4,536,326 AGranted

Treatment of acrylamide and related compounds

AssigneeAmerican Cyanamid Company

InventorJoseph M. Schmitt

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Abstract

Acrylamide and related monomers are improved by incorporating therein an effective polymerization inhibitor in an amount greater than that which is inherently present in the monomer and a borane, i.e., sodium borohydride.

Claims12

Dependent claims

A composition comprising:

(a) a monomer of inferior polymerizability selected from acrylamide, acrylic acid and mixtures thereof, said monomer being in the form of a 10 to 60 weight percent aqueous solution having a pH above 8.0, said monomer containing an amount of oxygen such that said monomer solution has a positive oxygen solubility, and
(b) a monomer-improving amount, insufficient to catalyze polymerization of said monomer, of an alkali metal borohydride.

Dependencies are inferred from the claim text.

Facts

Application: 06/570,403Filed 4 Jan 1984 · continuation
Priority: 27 Apr 1981
Granted: 20 Aug 1985
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

C07C 253/32
Preparation of carboxylic acid nitriles: separation; Purification; Stabilisation; Use of additives
C07C 51/50
Separation; Purification; Stabilisation; Use of additives: use of additives, e.g. for stabilisation
C07C 231/22
Preparation of carboxylic acid amides: separation; Purification; Stabilisation; Use of additives
C08F 20/56
Amides , e.g. N,N-dimethylacrylamide or N-isopropylacrylamide: acrylamide; Methacrylamide

Family

Serial258,235Parent of this continuation-in-part · filed 27 Apr 1981
Serial362,351Parent of this continuation · filed 26 Mar 1982
US 4,536,326 AThis patent

From the US filing history. Foreign family members aren’t listed.

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