Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-06-21
1998-01-27
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524506, 524520, 524265, 523201, 523203, 523212, C08K 554, C08K 906, C08L 2716, C08L 2712
Patent
active
057123357
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an aqueous dispersion of a fluorine-containing polymer, particularly relates to an aqueous dispersion of a fluorine-containing polymer, which contains an organosilicon compound and is used suitably for various paints.
BACKGROUND ART
In the field of paints, various aqueous dispersions have been heretofore proposed. For example, JP-A- 1790/1992 discloses an aqueous dispersion of an acrylic copolymer and an aqueous dispersion comprising colloidal silica and a silane compound having a hydrolyzable group, but those dispersions are not satisfactory of stability of the dispersions, weatherability and long-term durability. Also JP-B-46394/1993 discloses an aqueous dispersion comprising organotrihydroxysilane, partially condensated product thereof, colloidal silica and silicone-modified acrylic resin, but that dispersion does not satisfy the requirements for weatherability and long-term durability.
From the above-mentioned points of view, an object of the present invention is to obtain an aqueous dispersion of a fluorine-containing polymer by combining a specific fluorine-containing polymer and an organosilicon compound, the polymer being excellent in dispersing stability and the aqueous dispersion being able to provide paints excellent in long-term adhesion, weatherability and soil resistance.
DISCLOSURE OF THE INVENTION
The present invention relates to an aqueous dispersion of a fluorine-containing polymer, wherein 1 to 20 parts by weight of an organosilicon compound is admixed on the basis of 100 parts by weight of solids in a fluorine-containing-polymer-dispersed aqueous composition.
In the present invention, it is preferable that a fluorine-containing polymer in the fluorine-containing-polymer-dispersed aqueous composition a fluorine-containing polymer obtained by polymerizing a fluoroolefin or by copolymerizing a fluoroolefin with a monomer being copolymerizable therewith, and that after the above-mentioned polymerization or copolymerization, the organosilicon compound is admixed therewith.
Also in the present invention, it is preferable that the fluorine-containing polymer in the above-mentioned fluorine-containing-polymer-dispersed aqueous composition is a fluorine-containing seed polymer obtained by seed-polymerizing a monomer having a reactive .alpha.,.beta.-unsaturated group in the presence of particles of a fluorine-containing polymer obtained by polymerizing a fluoroolefin or by copolymerizing a fluoroolefin with a monomer being copolymerizable therewith, and that an organosilicon compound is admixed therewith after the above-mentioned seed-polymerization.
Further in the present invention, it is preferable that the above-mentioned monomer having the reactive .alpha.,.beta.-unsaturated group is an acrylic acid ester and/or a methacrylic acid ester.
Further in the present invention, it is preferable that a part of the above-mentioned monomer having the reactive .alpha.,.beta.-unsaturated group is an organosilicon compound having a reactive .alpha.,.beta.-unsaturated group, said organosilicon compound being contained in the monomer having the reactive .alpha.,.beta.-unsaturated group in an amount of 0.1 to 50% by weight.
Also in the present invention, it is preferable that the above-mentioned fluorine-containing polymer contains 70 to 95% by mole of vinylidene fluoride and 5 to 30% by mole of chlorotrifluoroethylene.
Further the present invention, it is preferable that the fluorine-containing polymer in the above-mentioned fluorine-containing-polymer-dispersed aqueous composition is the fluorine-containing seed polymer obtained by seed-polymerizing an acrylic acid ester and/or a methacrylic acid ester in the presence of particles of a fluorine-containing polymer obtained by copolymerizing a monomer mixture containing 70 to 95% by mole of vinylidene fluoride and 5 to 30% by mole of chlorotrifluoroethylene, and that the organosilicon compound is admixed therewith after the above-mentioned copolymerization or seed polymerization.
Further in the present
REFERENCES:
patent: 3325434 (1967-06-01), Tully
patent: 3838082 (1974-09-01), Sauer
patent: 3879302 (1975-04-01), Reick
patent: 4503179 (1985-03-01), Yoshimura et al.
patent: 4514537 (1985-04-01), Cavanaugh
patent: 5030667 (1991-07-01), Shimizu et al.
patent: 5194335 (1993-03-01), Effenberger et al.
patent: 5216081 (1993-06-01), Mohri et al.
patent: 5344862 (1994-09-01), Nohr et al.
Imoto Katsuhiko
Iwakiri Ryuzi
Tsuda Nobuhiko
Yonei Yasushi
Daikin Industries Ltd.
Yoon Tae
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