Compositions – Durable finishes for textile materials – or processes of... – Oil or water repellent or soil resistant or retardant
Patent
1995-01-13
1996-03-12
Green, Anthony
Compositions
Durable finishes for textile materials, or processes of...
Oil or water repellent or soil resistant or retardant
252 87, 252 875, 252 88, 252 89, D06M 13144
Patent
active
054983509
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates to a liquid softener composition for clothes which can impart an excellent softness and antistatic properties to various fibers.
DESCRIPTION OF THE RELATED ART
During repeated wear and laundering, fiber-treatments are washed away from clothes, or fibers become hardened due to the deterioration of the fibers per se, which results in undesirable changes in the texture of the fibers or fabric. In recent years, therefore, softeners capable of imparting softness and antistatic properties to fibers have been widely used for domestic purposes.
Most of the household softeners marketed today comprise a cationic surfactant having 1 or 2 long-chain alkyl groups and a quaternary ammonium group per molecule (hereinafter referred to as a quaternary ammonium salt), in particular, a di(hardened beef tallow alkyl)dimethylammonium salt as the main component.
The softening effect of such a softener is exhibited by a decrease in the coefficient of friction on the surface of the fiber due to the lubricating effect of lipophilic sites in molecules of the base, i.e., the above-mentioned cationic surfactant, adsorbed on the surface of the fiber. However, it is unavoidable that a softener base having an excellent softening effect gives a sticky feeling, i.e., a so-called greasy feeling, to the clothes to be treated therewith. The extent of this greasy feeling varies depending on, for example, the type of fibers to be treated with the softener and the knitting technique. Generally, underwear such as plain-knitted cotton underwear and nylon tricot slip which is brought into direct contact with the skin, and towels with which the hands directly come into contact and of which the texture can be sensitively felt, are often evaluated as having a greasy feeling or an extremely oily feeling as a result of the softening treatment. When such a softener is used at a high concentration, this greasy feeling becomes more serious, though the softening effect is enhanced thereby. It has been therefore believed that the softening effect of the conventional softener compositions comprising a quaternary ammonium salt is correlated with this greasy feeling.
Under these circumstances, there have been proposed softener compositions containing a quaternary ammonium salt together with various additives, for example, a softener composition containing an acyclic quaternary ammonium salt, a specific poly-quaternary ammonium salt and a nonionic compound [see U.S. Pat. Nos. 4,126,562 (patented on Nov. 21, 1978; assignee: PROCTER AND GAMBLE CO) and 4,128,484 (patented on Dec. 5, 1978; assignee: PROCTER AND GAMBLE CO)]; a softener composition containing a quaternary ammonium salt, a cationic polyamide and a fatty acid glyceride [see GB Patent Publication-A No. 2,204,608 (published on Nov. 16, 1988)]; and a softener composition containing a quaternary ammonium salt, a fatty acid (salt) and glyceride [see Japanese Patent Publication-A No. 63-295,764 (published on Dec. 2, 1988)]. However, the present inventors have found that the above-mentioned problem of greasy feeling of the fibers or fabric resulting from using these softener compositions cannot be fully solved so long as they contain a quaternary ammonium salt as the effective component, even though various additives are employed therewith.
Accordingly, an object of the present invention is to provide a liquid softener composition to be used in a rinsing bath of a washing tub which can effectively impart a softness to both natural and synthetic fibers without giving any greasy feeling to the fibers to be treated therewith.
DISCLOSURE OF THE INVENTION
SUMMARY OF THE INVENTION
Under these circumstances, the present inventors have conducted extensive studies in order to solve the above-mentioned problem. As a result, they have found that the above-mentioned object can be achieved by using a combination of special components, thus completing the present invention.
Accordingly, the present invention provides a liquid soft
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Inokoshi Junichi
Sakata Yushi
Tamura Yumiko
Green Anthony
Kao Corporation
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