Use of graft polymers based on polyalkylene oxides as grayness inhibitors in the wash and aftertreatment of textile material containing synthetic fibers

• US 4,904,408 A
• Filed: 03/31/1988
• Issued: 02/27/1990
• Est. Priority Date: 04/03/1987
• Status: Expired due to Term

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Kud, Alexander, Trieselt, Wolfgang, Hartmann, Heinrich
• Primary Examiner(s): Lieberman, Paul
• Assistant Examiner(s): McNally, John F.
• Application Number:
  US07/176,333
• Time in Patent Office: 698 Days
• Field of Search: 252/174.23, 252/174.24, 252/DIG. 2, 252/DIG. 15, 252/95, 252/99
• US Class Current: 510/360
• CPC Class Codes: C11D 3/0036 Soil deposition preventing compositions; Antiredeposition agents
• CPC Class Codes: C11D 3/3788 Graft polymers

Abstract

A detergent contains as a grayness inhibitor in the wash and aftertreatment of textile material containing synthetic fibers a graft polymer obtainable by grafting

(a) a polyalkylene oxide which has a number average molecular weight of from 300 to 100,000 and is based on ethylene oxide, propylene oxide and/or butylene oxide with

(b) N-vinlypyrrolidone and

(c) a vinyl ester derived from a saturated monocarboxylic acid containing from 1 to 6 carbon atoms and/or a methyl or ethyl ester of acrylic or methacrylic acid in a weight ratio (a):(b):(c) of from 1:0.3:1 to 1:5:30, the order of the addition of (b) and (c) in the graft copolymerization being immaterial and it being possible for up to 1 mole % of the grafted-on monomers (c) to be hydrolyzed.

Claims

1. A detergent comprising surfactants and builders which contains, as an added soil antiredeposition agent, from 0.1 to 5% by weight of a graft polymer which is obtainable by grafting

(a) a polyalkylene oxide which has a number average molecular weight of from 30 to 100,000 and is based on ethylene oxide, propylene oxide and/or butylene oxide with

(b) N-vinylpyrrolidone and

(c) a vinyl ester derived from a saturated monocarboxylic acid containing from 1 to 6 carbon atoms and/or a methyl or ethyl ester of acrylic or methacrylic acid in a weight ratio (a):

(b);

(c) of from 1;

0.3;

1 to 1;

5;

30, the order of the addition of monomers (b) and (c) in the graft polymerization being immaterial.

2. A detergent as claimed in claim 1, wherein the graft polymer added as a soil antiredeposition agent is obtainable by grafting

(a) a polyalkylene oxide having a number average molecular weight of from 1,000 to 50,000 and an ethylene oxide content of from 40 to 100 mole % with

(b) N-vinylpyrrolidone and

(c) vinyl acetate.

3. A detergent as claimed in claim 1, wherein the graft polymer added as a soil antiredeposition agent has a K value of from 5 to 200 (determined according to H. Fikentscher in 2% strength by weight solution in dimethylformamide at 25°

C.).

4. A detergent as claimed in claim 1, wherein up to 15 mole % of the grafted esters of the graft polymer added as a soil antiredeposition agent are hydrolyzed.

5. A process for soil antiredeposition during washing with detergents having a reduced phosphate content of less than 25% by weight of sodium triphosphate, which comprises using as a soil antiredeposition agent a graft polymer which is obtainable by grafting

(a) a polyalkylene oxide which has a number average molecular weight of from 300 to 100,000 and is based on ethylene oxide, propylene oxide and/or butylene oxide with

(b) N-vinylpyrrolidone and

(c) a vinyl ester derived from a saturated monocarboxylic acid containing from 1 to 6 carbon atoms and/or a methyl or ethyl ester of acrylic or methacrylic acid in a weight ratio (a):

(b);

(c) of from 1;

0.3;

1 to 1;

5;

30, the order of the addition of monomers (b) and (c) in the graft polymerization being immaterial.

6. A process as claimed in claim 5, wherein the graft polymer used as a soil antiredeposition agent is obtainable by grafting

(a) a polyalkylene oxide having a number average molecular weight of from 1,000 to 50,000 and an ethylene oxide content of from 40 to 100 mole % with

(b) N-vinylpyrrolidone and

(c) vinyl acetate.

7. A process as claimed in claim 5, wherein the graft polymer used as a soil antiredeposition agent has a K value of from 5 to 200 (determined according to H. Fikentscher in 2% strength by weight solution in dimethylformamide at 25°

C.).

8. A process as claimed in claim 5, wherein up to 15 mole % of the grafted ester of the graft polymer added as a soil antiredeposition agent are hydrolyzed.