초록 ▼

Subject of this invention are plastisols based on selected plasticizers and on polymers of certain acrylic or methacrylic monomers, viz. mainly (i) t-butyl acrylate, a C1-4 alkyl, especially methyl, acrylate or cyclohexyl methacrylate, and optionally also (ii) one or more comonomers selected from me

Subject of this invention are plastisols based on selected plasticizers and on polymers of certain acrylic or methacrylic monomers, viz. mainly (i) t-butyl acrylate, a C1-4 alkyl, especially methyl, acrylate or cyclohexyl methacrylate, and optionally also (ii) one or more comonomers selected from methacrylates of aliphatic C2 to C10 alcohols, acrylates of aliphatic C1 to C10 alcohols, styrene and alpha-methyl styrene. The glass transition temperature of the polymer is above 35°C., its average degree of polymerization more than 400 and its average particle size in the plastisol is 0.1 to 500 microns.

대표청구항 ▼

A plastisol consisting essentially of (a) 100 weight parts of solid particles of an organic polymer having units derived from a monomer selected from t-butylacrylate or methyl, ethyl, n-propyl, isopropyl, isobutyl, sec-butyl, t-butyl or cyclohexyl methacrylate, and copolymers of at least one said mo

A plastisol consisting essentially of (a) 100 weight parts of solid particles of an organic polymer having units derived from a monomer selected from t-butylacrylate or methyl, ethyl, n-propyl, isopropyl, isobutyl, sec-butyl, t-butyl or cyclohexyl methacrylate, and copolymers of at least one said monomer with at least one comonomer selected from methacrylates of alphatic C2 to C10 alcohols, acrylates of C1 to C10 alcohols, styrene and a-methyl-styrene, whereby the polymer has an average particle size of 0.1 to 500 microns, a glass transition temperature above 35°C. and an average degree of polymerization of more than 400, (b) 0.1 to 50 parts by weight of an adhesion promoter, said adhesion promoter selected from triethyleneglycol dimethylacrylate, trimethylol trimethylacrylate combined with peroxides, amino silanes and mixtures thereof, and (c) 30 to 1000 parts of an organic liquid plasticizer which is sufficiently compatible with the polymer that at least 8 days after gelling of said plastisol the plasticizer does not exude from said plastisol, said plasticizer further being effective to provide the plastisol with a viscosity index V8/0 of less than 3.0; the average particle size of polymer (a) being related to its glass transition temperature so as to lie within the triangle XYZ of the accompanying drawing, said plastisol further being in the form of a liquid or paste-like dispersion of polymer particles in plasticizer capable of being gelled by heating to a temperature between about 70°and 240°C. In a plastisol, in which solid particles of an organic polymer component (a) are dispersed in an organic liquid component (b), which serves as a compatible plasticizer for the organic polymer, in a proportion effective to form a viscous dispersion having a liquid or paste-like appearance capable of being gelled by heating, the improvement in which the organic polymer component consists essentially of units derived from (i) at least one monomer selected from: t-butyl acrylate, a C1-4 alkyl methacrylate and cyclohexyl methacrylate, or (ii) at least one of the above monomers and at least one comonomer selected from: methacrylates of aliphatic C2 to C10 alcohols, acrylates of aliphatic C1 to C10 alcohols, styrene and alphamethylstyrene, and, as an adhesion promoter comonomer in said organic polymer component, (iii) at least one adhesion promoter comonomer selected from acrylate monomer with free functional groups selected from the group consisting of carboxyl, hydroxyl, epoxy and amino functional groups, methacrylate monomer with free functional groups selected from the group consisting of carboxyl, hydroxyl, epoxy and amino functional groups, copolymerizable heterocyclic vinyl compound of the general formula [Figure] in which n is equal to 0 or 1, R1 is a hydrogen atom, a linear or branched chain alkyl group with 1 to 4 carbon atoms or a phenyl group and R2 is a group of the formulae [Figure] in which R3 is a heterocyclic group having at least one ring with at least one nitrogen atom in the ring, the polymer having a glass transition temperature of above 35°C. and an average degree of polymerization of more than 400, and the average particle size of the polymer in the plastisol being from 0.1 to 500 microns; said plasticizer being present in an amount of from 30 to 1000 parts per 100 parts by weight of said polymer and being sufficiently compatible that at least 8 days after the gelling of said plastisol, the plasticizer does not exude from said plastisol, said plasticizer moreover being effective to provide the plastisol with a viscosity index V8/0 of less than 3.0.