Compositions – Radioactive compositions – Nuclear reactor fuel
Patent
1995-07-31
1997-03-25
Green, Anthony
Compositions
Radioactive compositions
Nuclear reactor fuel
252 861, 106 2, 526242, 526243, 526244, 526248, D06M 15256
Patent
active
056141238
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an agent for treating a textile, particularly relates to a textile treatment agent comprising a fluorine-containing graft polymer.
RELATED ART
Hitherto, known is a water- and oil-repellent comprising a random copolymer of a polyfluoroalkyl group-containing monomer and another copolymerizable hydrocarbon monomer. For example, a copolymer of the polyfluoroalkyl group-containing monomer and a long chain alkyl group-containing (meth)acrylate such as stearyl (meth)acrylate can have better water- and oil-repellency and better resistance to the washing and dry cleaning than a homopolymer of the polyfluoroalkyl group-containing monomer (cf. Japanese Patent Kokai Publication Nos. 9619/1980 and 29501/1980 and Japanese Patent Kokoku Publication Nos. 8068/1985 and 56912/1988).
Recently filed was a patent application disclosing that a graft copolymer in which a branch segment made of a fluoropolymer is grafted to a backbone segment made of a hydrocarbon polymer can cover more effectively a treated substrate such as a fiber than the above random copolymer and can give the high water- and oil-repellency even in a small amount (cf. Japanese Patent Kokoku Publication Nos. 50082/1986, 21715/1988, 43509/1988 and 67511/1988).
On the other hand, hitherto, a random copolymer of a polyfluoroalkyl group-containing monomer and a copolymerizable specific monomer is well-known as the agent for giving the stainproof property to a textile typically such as a carpet. For example, Japanese Patent Kokai Publication Nos. 642/1971 and 35188/1977 can be referred to.
It is reported that a mixture of a polyfluoroalkyl group-containing compound and a water-insoluble addition-polymerization polymer having a specific transition temperature can be used for the stainproof treatment of carpet. Japanese Patent Kokai Publication Nos. 7600/1972 and 128075/1980 can be referred to.
However, the above conventional random copolymer, graft copolymer and mixture still have insufficient water- and oil-repellency and stainproof property, and the treated fiber lacks in softness. When these copolymers prepared by the solution polymerization are used at a low temperature, the solubility is insufficient so as to give problems such as solidification in solution. Accordingly, there is a problem that the composition of the used copolymer and the kind of solvent are limited.
Generally, in the case of the random copolymer, the fluorine-containing component and the hydrocarbon component are present in the unit of monomer so that the functions thereof are canceled out. In the case of the graft copolymer, a microscopic phase separation structure is formed and the functions of both of the fluorine-containing component and the hydrocarbon component can be theoretically exhibited. However, the above Patent Publications suffer from the disadvantages that the graft copolymer has the insufficient graft efficiency and a homopolymer is present, or the number and length of the branches are ununiform, and that the functions of the graft copolymer are not sufficiently exhibited.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a textile treatment agent having the excellent water- and oil-repellency and stainproof property.
The present inventors intensively studied to solve the above problems. Finally, the present inventors found that the object is achieved by the use of a graft fluorocopolymer having a backbone of a polymer of a fluoromonomer and a branch of a polymer of a macromonomer, the graft fluorocopolymer being prepared by copolymerizing the fluoromonomer with the macromonomer which is a fluorine-free macromonomer having addition-polymerizable unsaturated group at a molecular end, and completed the present invention.
Accordingly, the gist of the present invention resides in a textile treatment agent which comprises the graft fluorocopolymer prepared by the above method as an active component.
The textile treatment agent of the present invention can act as a water-and oil-repellent and a s
REFERENCES:
patent: 3645990 (1972-02-01), Reynolds
patent: 4264484 (1981-04-01), Patel
patent: 4296224 (1981-10-01), Fukui et al.
patent: 4340749 (1982-07-01), Patel
patent: 4468527 (1984-08-01), Patel
Enomoto Takashi
Hayashi Kazunori
Kubo Motonobu
Morita Masamichi
Sano Taro
Daikin Industries Ltd.
Green Anthony
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