Abstract There is described a novel copolymer comprising approximately equimolar proportions of N-vinylcarbazole and a copolymerisable ethylenically unsaturated carboxylic acid such as acrylic acid or methacrylic acid, which can be prepared by mixing the monomers in a wide range of relative proportions, alone or diluted in a solvent, and initiating copolymerisation by methods known to the art, and which can be cross-linked, e.g. by means of polyvalent metal cations; this cross-linking is reversible on treatment with strong acid. The copolymer has good thermal and mechanical properties and adhesive properties, e.g. for metals, and can be used to form protective coatings on metals and to form metal and metal/plastics laminates.
A copolymer made up of units of N-vinyl-carbazole alternated with units of a polymerisable ethylenically unsaturated carboxylic acid selected from acrylic acid and methacrylic acid
Claim 2
Dependent Claim
25 words
A copolymer made up of units of N-vinyl-carbazole alternated with units of a polymerisable ethylenically unsaturated carboxylic acid selected from acrylic acid and methacrylic acid
Claim 3
Dependent Claim
23 words
An at least semi-finished product composed of a copolymer as set forth in claim 1 cross-linked with at least one polyvalent metal ion.
Claim 4
Dependent Claim
82 words
A process for the manufacture of a copolymer which comprises the steps of forming a mixture of the monomers N-vinylcarbazole and a polymerisable ethylenically unsaturated carboxylic acid selected from acrylic acid and methacrylic acid, the molar proportion of each monomer in said mixture being from 1 to 99% of the total of said monomers, diluting said mixture in a solvent, initiating copolymerisation of said mixture, and effecting cross-linking of the resultant copolymer with the aid of at least one polyvalent metal ion.
Claim 5
Dependent Claim
82 words
A process for the manufacture of a copolymer which comprises the steps of forming a mixture of the monomers N-vinylcarbazole and a polymerisable ethylenically unsaturated carboxylic acid selected from acrylic acid and methacrylic acid, the molar proportion of each monomer in said mixture being from 1 to 99% of the total of said monomers, diluting said mixture in a solvent, initiating copolymerisation of said mixture, and effecting cross-linking of the resultant copolymer with the aid of at least one polyvalent metal ion.