Unsaturated carboxylic acid polymer, biodegradable builder, and detergent composition
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsShigeru Matsuo, Yoshikatsu Seino
Life of this patent
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Abstract
Provided are an unsaturated carboxylic acid polymer having a degree of calcium-sequestering ability of at least 150 mg CaCO3/g, a degree of 28-day biodegradability of at least 40%, and a number-average molecular weight of from 500 to 1,000,000; a process for producing the unsaturated carboxylic acid polymer by copolymerizing an unsaturated carboxylic acid or its salt with a quinone in the presence of a polymerization initiator; a builder comprising the polymer; a detergent composition comprising the builder and a surfactant; and a dispersant comprising the polymer. The polymer has good calcium ion-sequestering ability and good biodegradability, and is highly useful as a material for builders.
Claims22
An unsaturated carboxylic acid polymer having a number-average molecular weight of from 500 to 1,000,000, which is prepared by copolymerizing an unsaturated carboxylic acid or its salt of a general formula [I]:
- wherein X represents a hydrogen atom, an alkali metal atom, or an ammonium group;
- Y represents a hydrogen atom or a group COOX;
- R1 represents a hydrogen atom or a methyl group,
- with a quinone in the presence of a polymerization initiator.
An unsaturated carboxylic acid polymer having repetitive units (1) of a general formula [II]:
- wherein X represents a hydrogen atom, an alkali metal atom, or an ammonium group;
- R1 represents a hydrogen atom or a methyl group,
- repetitive units (2) of a general formula [III]:
- wherein X represents a hydrogen atom, an alkali metal atom, or an ammonium group,
- and repetitive units (3) of a general formula [IV]:
- wherein W represents a hydrogen atom, an alkali metal atom, or an ammonium group,
- and having a number-average molecular weight of from 500 to 1,000,000.
A method for producing an unsaturated carboxylic acid polymer, which comprises copolymerizing an unsaturated carboxylic acid or its salt of formula [I] with a quinone in the presence of a polymerization initiator.
A detergent composition containing an unsaturated carboxylic acid copolymer and a surfactant, in which the copolymer has repetitive units (1) of a general formula [VI]
- wherein X represents a hydrogen atom, an alkali metal atom, or an ammonium group;
- Y represents a hydrogen atom or a group COOX;
- R1 represents a hydrogen atom or a methyl group,
- and repetitive units (2) of a general formula [IV]:
- wherein W represents a hydrogen atom, an alkali metal atom, or an ammonium group,
- and has a number-average molecular weight of from 500 to 1,000,000.
Dependencies are inferred from the claim text.