Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-12-16
1998-11-17
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
8137, 510300, 510302, 510350, 510351, 510352, 510470, 510473, 510496, 510497, 510498, C11D 322, C11D 3395, C11D 360
Patent
active
058376666
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a detergent composition containing a methyl cellulose ether for effectively releasing both muddy soil (particulate soil) and oily soil deposited on polyester fibers in water at not more than 30 degree C.
Methyl cellulose ethers or detergent compositions or conditioning compositions containing the methyl cellulose ethers are disclosed in U.S. Pat. Nos. 4,000,093; 4,048,433; 4,100,094; 4,136,038; 4,564,463; 4,441,881; and 4,770,666; British Patent No. 1,498,520 and Japanese Patent Laid-Open Publication No. 142007/1976. It is known that the methyl cellulose ethers have a soil release effect. When soiled polyester fibers are washed in washing water not more than 30 degree C., high molecular weight methyl cellulose ethers release well oily soil. However, such high molecular weight methyl cellulose ethers insufficiently release muddy soil. On the other hand, low molecular weight methyl cellulose ethers can release muddy soil. However, such low molecular weight methyl cellulose ethers insufficiently release oily soil.
The present invention relates to a detergent composition containing a methyl cellulose ether having a particular viscosity and a particular degree of methyl alkyl substitution (DS methyl) by which both oily soil and muddy soil deposited on polyester fibers are selectively very well released in washing water at not more than 30 degree C. at the same time and thus the composition has an excellent polyester fiber detergency.
SUMMARY OF THE INVENTION
That is, the present invention relates to a detergent composition for use in washing of polyester fibers comprising
(i) from 0.05 to 2% by weight of a methyl cellulose ether wherein its solution viscosity measured at a temperature of 20 degree C. as a 2 wt % aqueous solution is from 80 to 120 centipoises (cps) and its average degree of methyl substitution (DS methyl) per anhydroglucose is from about 1.6 to about 2.3;
(ii) from 25 to 65% by weight of a detergent surfactant;
(iii) from 0 to 20% by weight of a bleaching component; and
(iv) from 30 to 70% by weight of a builder and an alkaline material.
DETAILED DESCRIPTION OF THE INVENTION
The methyl cellulose ether described above preferably is represented by the following formula: ##STR1## wherein R represent a hydrogen atom or a methyl group, respective R may be the same or different; n represents a degree of polymerization wherein n is a value such that its solution viscosity measured at a temperature of 20 degree C. as a 2 wt% aqueous solution is from 80 to 120 centipoises (cps).
The methyl cellulose ethers used in the present invention are those wherein the solution viscosity measured at a temperature of 20 degree C. as a 2 wt % aqueous solution is from 80 to 120 centipoises (cps), preferably from 90 to 110 centipoises (cps) and the average degree of methyl substitution (DS methyl) per anhydroglucose is from about 1.6 to about 2.3, preferably from about 1.7 to about 1.9, more preferably about 1.8. Such methyl cellulose ethers are available, for example, as Metolose SM 100 (manufactured by Shin-etsu Kagaku Kogyo K.K.).
If the solution viscosity is less than 80 cps, then it will be difficult to release oily soil. If the solution viscosity is more than 120 cps, then it will be difficult to release muddy soil.
If the average degree of methyl substitution is less than about 1.6, then it will be difficult to dissolve the methyl cellulose ether in water and an organic solvent such as a surfactant, and it will be difficult to release muddy soil. If the average degree of methyl substitution is more than about 2.3, then it will be difficult to dissolve the methyl cellulose ethers in water.
When the viscosity is converted to molecular weight by a method described in Polymer Paper Vol. 39, No. 4, pp. 293-298 (April, 1982), the methyl cellulose ethers having a solution viscosity measured at 20 degree C. as a 2 wt % aqueous solution of from 80 to 120 centipoises (cps), preferably from 90 to 110 centipoises (cps) approximately correspond to methyl cellulose e
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Clauss Allen David
Kitko David Johnathan
Murata Susumu
Shimamura Kiyomi
Bolam Brian M.
Hertzog Ardith
Rasser Jacobus C.
The Procter & Gamble & Company
Zerby Kim William
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