Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1988-10-20
1990-12-11
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524217, 524236, 524504, 524571, C08K 516, C08K 520
Patent
active
049772040
DESCRIPTION:
BRIEF SUMMARY
The invention relates to non-aqueous shade enhancing agent composition for a soft goods, in particular which serves to improve the chromophoric property of dyed material as well as the depth and sharpness of a color. It may be called as a non-aqueous shade improver or a non-aqueous color-enriching agent.
DESCRIPTION OF PRIOR ART
Heretofore, as a serious problem of a synthetic fiber, particularly a polyester type fiber, as compared with a natural fiber, such as wool, silk, etc., there has been mentioned a point that it is inferior to them in the depth and sharpness of the color of a dyed material. Accordingly, research has been continued to improve the sharpness and depth of color of a dyed material and some reports have been made.
For example, in "Dyes and Chemicals", Vol. 15, No. 1, p. 3 to 8 (1970), it has been explained experimentally and theoretically, based on the fact that when a dye cloth is wetted with water (refractive index: 1.33), it looks like dark and sharp, that if a dyed cloth is treated with a resin processing agent having a low refractive index, the same color-enriching effect as in wetting with water can be obtained, and further it was explained that the reason is that is decreases the surface reflectance. Also, in "Textile Engineering", Vol. 26, No. 3, p. 188 (1973), in the summary of discussion entitled "Textile surface and color developability", color development of a polyester fiber due to a disperse dye decreases the reflectance of a surface layer, and in order to increase the light volume incident in the fiber and heighten the color development efficiency, it is effective to form a layer having a suitable refractive index on a surface of the fiber, and it is disclosed that by coating a low polymerized material of trifluorochloroethylene (refractive index: 1.4) on a dyed PET filament, it becomes dark in color.
Various proposals have been effected based on these facts. In Japanese Provisional Patent Publication No. 111192/1978, there has been disclosed a fiber structural material having a thin film formed by a polymer having a refractive index of 1.50 or less, and as a method for preparation, there has been proposed a method in which a monomer cable of forming a polymer having a refractive index of 1.5 or less is charged in a closed apparatus with the fiber and is subjected to plasma polymerization or discharge graft polymerization to form a thin film. Also, in Japanese Provisional Patent Publication No. 26232/1980, there is disclosed a method in which a compound having a low refractive index of 1.45 or less is adsorbed onto a surface of a fiber structural material, in an amount of 0.3% to 10%, in the form of a thin film, and then dry heating or wet heating processing is carried out. Further, as a starting material for formation of the thin film, there has been described that a fluorine resin, an acrylate resin, a vinyl polymer or a silicone resin having a refractive index of the polymer of 1.45 or less can be used, and as a concrete example, there has been disclosed a method in which by using an emulsified material or a solvent solution of a fluorine-containing compound or acrylate, fiber is dipped therein and adsorbed at a high temperature or after spray coating, dry heating or wet heating processing is carried out to form a thin film on the fiber.
However, the method disclosed in Japanese provisional Patent Publication No. 111192/1978 has many disadvantages in that since it is a batch producing system, the efficiency is bad, and it requires specific facilities, and when polymerization of monomers is required, the loss of the polymer is remarkable since the polymerized polymer attaches to a wall of the apparatus and washing thereof is troublesome whereby the method is not suitable for industrial production. Also, in the method disclosed in Japanese provisional Patent Publication No. 26232/1980, a large amount of a solution should be heated to a high temperature since uniform adsorption is possible only at a high temperature in a dipping method with a large bath ratio, so that it
REFERENCES:
patent: 2836517 (1958-05-01), Gruber et al.
patent: 4007149 (1977-02-01), Burton et al.
Iguchi Kazuo
Murata Moriyasu
Nebashi Tsutomu
Kao Corporation
Schofer Joseph L.
Sweet Mark
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