Abstract: A method for starting continuous slab casting capable of facilitating withdrawal of a dummy bar to start smooth continuous slab casting is provided at the start of casting of continuous slab casting, where lateral side plates 2 of the mold 10 are pinched by longitudinal side plates 1 of the mold and are adjustable in the slab width direction; where a dummy bar 4 is set at a desired level at the center in a width-variable, continuous casting mold; and clearances each between lateral side plates 2 and the dummy bar 4 are adjusted to 1-3 mm, while maintaining the lateral side plates 2 vertically, then sealing materials 5 are filled into the clearances; then molten steel is poured into the mold; and then the top ends of the lateral side plates 2 are made more apart outwardly, thereby giving a downwardly tapered profile to the lateral side plates 2, when no more poured molten steel is passed into the clearance between the formed solidified shell 6a and the plates 1 and 2, while withdrawing the dummy bar 4 downward

Abstract: Vinyl ethers having a carboxyl group in a form of salt are stable and is usable as materials for fluorine-containing copolymers. The vinyl ethers can provide stable monomer compositions by mixing with vinyl ethers having a free carboxyl group when the former vinyl ethers are present in an amount of not less than 1% by mole of the latter vinyl ethers. The fluorine-containing copolymer prepared by copolymerizing fluoroolefins with the vinyl ethers are useful as aqueous coatings particularly electro dip coatings.

Abstract: Vinyl ethers having a carboxyl group in a form of salt are stable and is usable as materials for fluorine-containing copolymers. The vinyl ethers can provide sable monomer compositions by mixing with vinyl ethers having a free carboxyl group when the former vinyl ethers are present in an amount of not less than 1% by mole of the latter vinyl ethers. The fluorine-containing copolymer prepared by copolymerizing fluoroolefins with the vinyl ethers are useful as aqueous coatings particularly electro dip coatings.

Abstract: An electrodeposition coating composition comprising a fluorine-containing copolymer having an anionic functional group, a curing agent and water, said copolymer comprising:(a) 20 to 80% by mole of the structural unit of the formula (1):--CFX--CF.sub.2 -- (1)(b) 5 to 60% by mole of the structural unit of the formula (2): ##STR1## (c) 0 to 40% by mole of the structural unit of the formula (3): ##STR2## (d) 0 to 40% by mole of the structural unit of the formula (4): ##STR3## the total amount of the structural units (a), (b), (c) and (d) being 100% by mole. The composition of the invention can be baked to substrates at a low temperature in comparison with compositions containing conventional fluorine-containing copolymers, and the films obtained by electrodepositing the composition are excellent in gloss, weatherability, adhesion to the substrates, alkali resistance and smoothness.

Abstract: An aqueous fluorine-containing rubber coating composition comprising (a) fluorine-containing rubber, (b) fluorine-containing resin, (c) an aminosilane compound of the formula: ##STR1## wherein R is methyl or ethyl; X is a single bond or --(CH.sub.2).sub.2 --NH--, --CONH-- or --(CH.sub.2).sub.2 --NH--(CH.sub.2).sub.2 --NH--; and n is 2 or 3, and (d) an aqueous liquid vehicle, the weight ratio of the component (a) and the component (b) being from 95:5 to 35:65, which makes the resultant coating film non-adherent and more lubricous.

Abstract: A fluoroelastomer-containing non-tacky electrically conductive coating composition which comprises (a) a fluoroelastomer, (b) a fluororesin, (c) a coupling agent, (d) an electrically conducting material, (e) a liquid vehicle and optionally (f) an inorganic fibrous material, the weight ratio of the fluoroelastomer (a) and the fluororesin (b) being from 95:5 to 35:65, a coating film formed from which has electrical conductivity as well as the properties inherent to the fluoroelastomer.

Abstract: A water-based fluoroelastomer coating composition improved in adhesiveness onto a substrate, which comprises (A) an aqueous fluoroelastomer dispersion blended with (B) an aminosilane compound of the formula: ##STR1## wherein R is methyl or ethyl, X is a single bond, ##STR2## and y is an integer of 2 or 3 and optionally with (C) an amine compound having at least one terminal amino group directly bonded to an aliphatic hydrocarbon residue.