Compositions – Durable finishes for textile materials – or processes of... – Oil or water repellent or soil resistant or retardant
Patent
1998-12-09
2000-10-03
Gupta, Yogendra
Compositions
Durable finishes for textile materials, or processes of...
Oil or water repellent or soil resistant or retardant
252 861, 4273934, D06M 900, B05D 302
Patent
active
061268496
DESCRIPTION:
BRIEF SUMMARY
1. Field of the Invention
The present invention relates to an aqueous dispersion-type fluorine-containing water- and oil-repellent having excellent fastness to rubbing.
2. Related Art
Heretofore, aqueous dispersion-type fluorine-containing water- and oil-repellents prepared by emulsion-polymerization of a perfluoroalkyl group-containing methacrylate or acrylate ester with a monomer copolymerizable therewith have been used to confer water- and oil-repellency on a textile. Usually, these water- and oil-repellents are produced by emulsion-polymerization in the presence of a hydrocarbon-based emulsifier. However, if a dyed fabric made of fibers is subjected to water- and oil-repellency treatment with a fluorine-containing compound, there is the disadvantage of reduction of dye fastness to rubbing.
In order to prevent deterioration of fastness, a composition comprising a fluorine-containing compound and a specific polysiloxane has been proposed (Japanese Patent Kokoku Publication No. 1232/1983). Further, a composition comprising a glycol and a fluorine-containing compound has also been proposed (Japanese Patent Kokai Publication No. 173772/1995). However, these compositions are not adequate in respect of fastness to rubbing. In particular, fabrics composed of micro-fibers referred to collectively as new synthetic fibers have not achieved satisfactory results under the present circumstances.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an aqueous dispersion-type fluorine-containing water- and oil-repellent excellent in fastness to rubbing.
The present invention provides an aqueous dispersion-type fluorine-containing water- and oil-repellent wherein (A) a fluorine-containing copolymer comprising (A-1) a monomer having a polyfluoroalkyl group and (A-2) a monomer copolymerizable therewith is dispersed in the presence of (B) an emulsifier comprising a fluorine-containing cationic surfactant.
DETAILED DESCRIPTION OF THE INVENTION
Examples of the polyfluoroalkyl group-containing monomer (A-1) in the present invention include the following polyfluoroalkyl group-containing (meth)acrylates: ##STR1## wherein R.sub.f is a C.sub.3 -C.sub.21 polyfluoroalkyl group or polyfluoroalkenyl group, R.sup.1 is hydrogen or a C.sub.1 -C.sub.10 alkyl group, R.sup.2 is a C.sub.1 -C.sub.10 alkylene group, R.sup.3 is hydrogen or a methyl group, Ar is an arylene group which may have a substituent group, and n is an integer of 1 to 10.
Specific examples are as follows: OCOCH.dbd.CH.sub.2, (CH.sub.3).dbd.CH.sub.2, (CH.sub.3).dbd.CH.sub.2, OCOCH.dbd.CH.sub.2, (CH.sub.2).sub.2 OCOCH.dbd.CH.sub.2, ##STR2##
As a matter of course, the polyfluoroalkyl group-containing monomer (A-1) may be used as a mixture of at least two.
The other monomer (A-2) copolymerizable with the polyfluoroalkyl group-containing monomer (A-1) includes, but is not limited to, known compounds having a polymerizable unsaturated linkage. The monomer (A-2) may be a monomer containing no fluorine atom. Specific examples of the other monomer (A-2) copolymerized include (meth)acrylates such as 2-ethylhexyl (meth)acrylate, cyclohexyl (meth)acrylate, stearyl (meth)acrylate, hydroxyalkyl (meth)acrylate, polyoxyalkylene (meth)acrylate, 3-chloro-2-hydroxypropyl (meth)acrylate, glycidyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate and N,N-diethylaminoethyl (meth)acrylate. Further, mention is made of ethylene, butadiene, vinyl acetate, chloroprene, vinyl halides such as vinyl chloride and vinyl fluoride, halogenated vinylidene, styrene, acrylonitrile, (meth)acrylamide, vinyl alkyl ether, diacetone(meth)acrylamide, N-methylol(meth)acrylamide, vinyl alkyl ketone, maleic anhydride, N-vinylcarbazole and (meth)acrylic acid. The other monomer (A-2) can be used alone or in combination of at least two of the above compounds.
Among them, vinyl chloride or stearyl acrylate are preferable in view of water- and oil-repellency, stain resistance, washing durability and dry cleaning durability for water- and oil-repellency and stain resistance, and feeling. A
REFERENCES:
patent: 4778915 (1988-10-01), Lina et al.
patent: 4920190 (1990-04-01), Lina et al.
patent: 5093398 (1992-03-01), Rottger et al.
patent: 5350795 (1994-09-01), Smith et al.
patent: 5439998 (1995-08-01), Lina et al.
patent: 5466770 (1995-11-01), Audenaert et al.
patent: 5614123 (1997-03-01), Kubo et al.
patent: 5725789 (1998-03-01), Huber et al.
patent: 5804650 (1998-09-01), Tsudsa et al.
patent: 5817419 (1998-10-01), Fryd et al.
patent: 5852148 (1998-12-01), Behr et al.
patent: 5876617 (1999-03-01), Sato et al.
patent: 5883175 (1999-03-01), Kubo et al.
Ogura Eiji
Uesugi Norimasa
Yamana Masayuki
Daikin Industries Ltd.
Gupta Yogendra
Webb Gregory E.
LandOfFree
Aqueous dispersion-type fluorinated water- and oil-repellent does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aqueous dispersion-type fluorinated water- and oil-repellent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aqueous dispersion-type fluorinated water- and oil-repellent will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-191701