초록 ▼

A polymeric composition comprising main chains, side chains attached thereto and crosslinking units between side chains. The main chains comprise a copolymer of two or more ethylenically unsaturated monomers at least one of which contains hydroxyl groups, the side chains comprise lactone chains atta

A polymeric composition comprising main chains, side chains attached thereto and crosslinking units between side chains. The main chains comprise a copolymer of two or more ethylenically unsaturated monomers at least one of which contains hydroxyl groups, the side chains comprise lactone chains attached to said hydroxyl groups and the crosslinking units comprise amino resins. The copolymers may be prepared and subsequently modified or the side chain may be attached to an ethylenically unsaturated monomer and the modified copolymer prepared directly by polymerization with other unsaturated monomers. The modified copolymers are crosslinked and cured with an amino resin.

대표청구항 ▼

A process for the preparation of a crosslinked modified copolymer having the desirable combination of flexibility, hardness and chemical durability which comprises: a. reacting together at least two ethylenically unsaturated monomErs at least one of which is an ethylenically unsaturated hydroxyalkyl

A process for the preparation of a crosslinked modified copolymer having the desirable combination of flexibility, hardness and chemical durability which comprises: a. reacting together at least two ethylenically unsaturated monomErs at least one of which is an ethylenically unsaturated hydroxyalkyl ester of formula CH2 =CR1 －COOR2 in which R1 is H or an alkyl group and R2 is an alkyl group to which one or more －CH2OH groups are attached, to form a copolymer, b. modifying said copolymer by reacting it with from 10% to 60% by weight of an epsilon caprolactone, and c. crosslinking the modified copolymer of (b) with from 10% to 40% by weight of an amino resin selected from the group consisting of urea formaldehydes, melamine formaldehydes and benzoguamine formaldehydes.