| 摘要 |
Polymers in the form of solid aggregate are obtained by reacting polymers derived from unsaturated mono- or di-carboxylic acids with polymers having unreactive blocking groups at one end of the chain and hydroxy or amino groups at the other end. Polymers in the form of a solid aggregate (I), obtained by reaction of: (A) polymer(s) derived from (a) unsaturated mono- or di-carboxylic acid(s) or analogs thereof and optionally (b) other unsaturated monomer(s); (B) polymer(s) which are terminated with functional hydroxy or amino groups at one end and blocked at the other end with groups which are unreactive under normal reaction conditions; and optionally (C) amine(s). Independent claims are also included for: (1) aggregated polymers (IA) as above, obtained by reaction of monomers (a) with (c) unsaturated esters and/or amides of polymer (B) and optionally other monomers (b) in presence of a radical initiator; (2) a method (M1) for the production of (I) by cooling a polymer melt and optionally pulverizing it into a transportable form; (3) a method (M2) for the production of (IA) by copolymerization of monomers as in (1) above, optionally in a solvent which is subsequently removed; and (4) aqueous solutions obtained by dissolving these polymers in water |
