Resin cross-linking
AssigneeThe University of Manchester
InventorsPeter A. Lovell, David J. Berrisford, Andrew Whiting
Life of this patent
Estimating the term…
Abstract
A method of effecting cross-linking of a resin comprises generating vinyl sulfonyl moieties in situ with the resin, said sulfonyl moieties then undergoing a reaction which effects cross-linking of the resin. The vinyl sulfonyl moieties may be generated as a result of a loss of a liquid carrier for the resin to be cross-linked. The cross-linking reaction may result from reaction of the vinyl sulfonyl moieties with nucleophilic groups in the resin composition. The resin may be a co-polymer of a compound of formula (IV) with other olefinically unsaturated monomers.
Claims33
A method of effecting cross-linking of a resin comprising generating vinyl sulfonyl moieties in situ with the resin, said vinyl sulfonyl moieties then undergoing a reaction which effects cross-linking of the resin, wherein the vinyl sulfonyl moieties are generated as a result of loss of a liquid carrier for the resin to be cross-linked.
A cross-linkable resin composition comprising
- (i) a polymer to be cross-linked;
- (ii) a liquid carrier for the polymer;
- (iii) nucleophilic groups;
- and
- (iv) vinyl sulfonyl precursor groups capable of generating vinyl sulfonyl groups on loss of liquid carrier from the composition
- at least one of the groups (iii) and (iv) being attached to the polymer to be cross-linked whereby loss of the liquid carrier results in generation of a vinyl sulfonyl moiety to effect cross-linking of the polymer,
- wherein the vinyl sulfonyl precursor groups are of the formula (II)
- where X is a leaving group, generation of the vinyl sulfonyl moiety results from loss of HX from the vinyl sulfonyl precursor groups, R1, R2 and R3 are hydrogen atoms, and can be a chemical bond to carbon or heteroatom functionality.
A latex comprising a continuous liquid phase and a discontinuous phase of a film-forming polymer incorporating
- (iii) nucleophilic groups;
- and
- (iv) groups of the formula (I)
- where X is a leaving groups and represents a chemical bond to a carbon or heteroatom, whereby loss of liquid results in generation of a vinyl sulfonyl moiety by loss of HX on the groups of formula (I) and cross-linking of the polymer by reaction of this vinyl sulfonyl and the nucleophilic groups.
A method of effecting cross-linking of a resin comprising generating vinyl sulfonyl moleties in situ with the resin, said vinyl sulfonyl moleties then undergoing a reaction which effects cross-linking of the resin wherein cross-linking results from reaction of the vinyl sulfonyl moleties with nucelophilic groups in the resin composition.
A cross-linkable latex resin composition comprising a polymer to be cross-linked in the form of particles in a continuous aqueous phase as liquid earner for the polymer particles, said polymer incorporating nucleophilic groups attached to the polymer chain and further incorporating vinyl sulfonyl precursor groups attached to the polymer chain, said vinyl sulfonyl precursor groups being of the formula (IIa)
- wherein loss of carrier water results in generation of vinyl sulfonyl moieties to effect cross-linking of the polymer.
Dependencies are inferred from the claim text.