| abstract |
A composition comprises a polyoxymethylene carboxylate of molecular weight of at least 15,000 and from 0.01 to 4% of a polymer having a molecular weight of at least 1,000 and containing nitrogen in unhindered tertiary amino groups. The composition may be prepared by contacting the nitrogen containing polymer mixed with polyoxymethylene with a carboxylic acid anhydride. Specified nitrogen containing polymers are the copolymers of tertiary amino nitrogen-containing acrylic monomers, e.g. dialkylamino ethyl methacrylate with methyl, ethyl or butyl acrylates or methyl methacrylate, ethylene, styrene, propylene, butadiene and vinyl chloride, or polyamides and the condensation products of N-dodecyliminodiacetic acid with 1,4-butanediol and N-pentyliminodiacetic acid with adipic acid. Specification 744,336 is referred to. |