Reactive plastisol dispersion
AssigneeW. R. Grace & Co.
InventorShiow C. Lin
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Abstract
This invention relates to a reactive plastisol dispersion comprising (1) a polyvinyl acetal thermoplast in particle form; (2) a liquid plasticizer member of the group consisting of (a) at least one an ethylenically unsaturated monomer, oligomer or prepolymer of the formula: ##STR1## wherein R is H or CH.sub.3, R.sub.1 is an organic moiety and n is 1 or more, (b) at least one unsaturated polyester containing the group: ##STR2## wherein R.sub.2 and R.sub.3 are organic moieties, x is 0-20 and y is 1-20; and (c) a mixture of (a) and (b); and, optionally, either (3) a free radical thermal initiator or (4) a photoinitiator for crosslinking. The reactive plastisol dispersion when fluxed can be useful as a sealant or adhesive.
Claims11
A reactive plastisol dispersion comprising
- (1) a polyvinyl acetal thermoplast in particle form having a particle size in the range from about 0.1 to about 1,500 microns and
- (2) a liquid plasticizer member of the group consisting of
- (a) at least one ethylenically unsaturated monomer, oligomer or prepolymer of the formula:
- ##STR15## wherein R is H or CH.sub.3, R.sub.1 is an organic moiety and n is 1 or more,
- (b) at least one unsaturated polyester containing the group:
- ##STR16## wherein R.sub.2 and R.sub.3 are organic moieties, x is 0-20 and y is 1-20;
- and
- (c) a mixture of (a) and (b),
- said liquid plasticizer being present in an amount ranging from 50 to 2,000 parts per 100 parts of the thermoplast by weight.
The process of forming a solidified homogeneous mass which comprises admixing a reactive plastisol dispersion comprising
- (1) a polyvinyl acetal thermoplast in particle form having a particle size in the range from about 0.1 to about 1,500 microns and
- (2) a liquid plasticizer member of the group consisting of
- (a) at least one ethylenically unsaturated monomer, oligomer or prepolymer of the formula:
- ##STR17## wherein R is H or CH.sub.3, R.sub.1 is an organic moiety and n is 1 or more,
- (b) at least one unsaturated polyester containing the group:
- ##STR18## wherein R.sub.2 and R.sub.3 are organic moieties, x is 0-20 and y is 1-20;
- and
- (c) a mixture of (a) and (b),
- said liquid plasticizer being present in an amount ranging from 50 to 2,000 parts per 100 parts of the thermoplast by weight, and thereafter heating the admixture for a time sufficient to flux the mass.
A composition comprising a reactive, solid, homogeneous, fluxed plastisol formed from
- (1) a polyvinyl acetal thermoplast in particle form having a particle size in the range from about 0.1 to about 1,500 microns and
- (2) a liquid plasticizer member of the group consisting of
- (a) at least one ethylenically unsaturated monomer, oligomer or prepolymer of the formula:
- ##STR19## wherein R is H or CH.sub.3, R.sub.1 is an organic moiety and n is 1 or more,
- (b) at least one unsaturated polyester containing the group:
- ##STR20## wherein R.sub.2 and R.sub.3 are organic moieties, x is 0-20 and y is 1-20;
- and
- (c) a mixture of (a) and (b),
- said liquid plasticizer being present in an amount ranging from 50 to 2,000 parts per 100 parts of the thermoplast by weight.
Dependencies are inferred from the claim text.