Abstract: According to the present invention, there is provided an improvement of a process for producing fluorine-containing copolymers comprising copolymerizing(a) a chlorinated fluoroolefin,(b) vinyl ether, and(c) an organosilicon compound having an olefinically unsaturated bond and a hydrolyzable bond,the improvement resides in that a chlorine trapping agent is allowed to exist in the system during the copolymerization reaction and/or the purification of the resulting copolymer, and the fluorine-containing copolymers are free from coloration.Further, according to the present invention, a fluorine-containing copolymer composition containing a specific curing catalyst is also provided and said composition is excellent in adhesion to substrates or base materials.

Abstract: Disclosed is a fluorine-containing copolymer composition comprising (A) a fluorine-containing copolymer comprising (a) a fluoro-olefin and (b) an organic silicon compound having an olefinic unsaturated bond and a hydrolyzable group in the molecule and (B) an organic silicon compound having an isocyanate group.This composition is soluble in an organic solvent at normal temperature and is curable at normal temperature. If a curing catalyst is incorporated in this composition, the resulting composition can be effectively used as a coating composition.

Abstract: According to the present invention, there is provided an improvement of a process for producing fluorine-containing copolymers comprising copolymerizing(a) a chlorinated fluoroolefin,(b) vinyl ether, and(c) an organosilicon compound having an olefinically unsaturated bond and a hydrolyzable bond,the improvement resides in that a chlorine trapping agent is allowed to exist in the system during the copolymerization reaction and/or the purification of the resulting copolymer, and the fluorine-containing copolymers are free from coloration.Further, according to the present invention, a fluorine-containing copolymer composition containing a specific curing catalyst is also provided and said composition is excellent in adhesion to substrates or base materials.

Abstract: A solvent soluble fluorine-containing polymer according to the present invention is a copolymer characterized by(i) consisting substantially of(a) fluoroolefin,(b) vinyl ether, and(c) an organosilicon compound having an olefinically unsaturated bond and a hydrohyzable group,(ii) said copolymer comprising, based on the total mole number of said (a)-(c) in the copolymer, 30-70 mol % of (a), 20-60 mol % of (b) and 1-25 mol % of (c) and(iii) said copolymer having a number average molecular weight (Mn) of 3000-200000 as measured by gel permeation chromatography.Further, according to the present invention, a coating composition having excellent weathering resistance and solvent resistance comprising the above-mentioned solvent soluble fluorine-containing polymer and organic solvent is also provided. In addition a coating process of said coating composition is also provided.

Abstract: A solvent soluble fluorine-containing polymer according to the present invention is a copolymer characterized by(i) consisting substantially of(a) fluoroolefin,(b) vinyl ether, and(c) an organosilicon compound having an olefinically unsaturated bond and a hydrohyzable group,(ii) said copolymer comprising, based on the total mole number of said (a)-(c) in the copolymer, 30-70 mol % of (a), 20-60 mol % of (b) and 1-25 mol % of (c) and(iii) said copolymer having a number average molecular weight (Mn) of 3000-200000 as measured by gel permeation chromatography.Further, according to the present invention, a coating composition having excellent weathering resistance and solvent resistance comprising the above-memtioned solvent soluble fluorine-containing polymer and organic solvent is also provided. In addition a coating process of said coating composition is also provided.

Abstract: The present invention relates to a hook device with which safe handling operation can be assured. This device is constructed such that, as any load heavier than the predetermined weight is applied thereto, an eccentric shaft carrying a pulley for suspension thereof is rotated, and thereby an appropriate load indicating means is actuated. By use of the hook device according to this invention, a signal indicates to an operator that a load more than the predetermined level has been applied.