| 摘要 |
A process for producing a film-forming material, which comprises graft-polymerizing a monomer having a radical polymerizable ethylenically unsaturated group in the presence of a radical initiator with a butadiene polymer of a low degree of polymerization having a number average molecular weight of 300 to 10,000, a butadiene copolymer of a low degree of polymerization containing not more than 50% by weight of a copolymer component, or a mixture of these, in the form of an aqueous solution, said butadiene polymer or copolymer in aqueous solution or aqueous dispersion containing 0.05 to 0.5 mole, per 100 g of the polymer, of a basic group of the general formula <IMAGE> wherein R1 represents a hydrogen atom, a halogen atom or an organic group containing 1 to 8 carbon atoms; R2 and R3 are identical or different and represent an organic group containing 1 to 20 carbon atoms; R4 represents a hydrogen atom or an organic group containing 1 to 20 carbon atoms; and X represents a hydrogen atom or a bond, and when X is a bond, the carbon atom attached to R1 and the adjacent carbon atom to which hydrogen is attached may form a part of the main chain.
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