초록 ▼

Plastisol coatings and adhesives having reduced bulk density are provided by incorporating hollow thermoplastic microspheres, wherein the surface of the microspheres is wet by a surfactant which preferentially wets the surface of the microspheres, where the total solids content of the plastisol does

Plastisol coatings and adhesives having reduced bulk density are provided by incorporating hollow thermoplastic microspheres, wherein the surface of the microspheres is wet by a surfactant which preferentially wets the surface of the microspheres, where the total solids content of the plastisol does not exceed the critical pigment volume concentration, and where the temperature and pressure of processing and use of the microsphere filled plastisol are kept to the minimums required for effective operation. Preferred hollow thermoplastic microspheres having a thermally bonded surface coating of a solid particulate material, such as calcium carbonate, silica, or the like are employed where the thermoplastic of the microspheres is wet by a surfactant which preferentially wets the surface of the thermoplastic and where the solid particulate material on the surface is wet by a surfactant or plasticizer which preferentially wets the solid particles are particularly effective in such plastisol coatings and adhesives.

대표청구항 ▼

In a plastisol composition comprising a thermoplastic resin, a plasticizer for said resin, an optional inert filler and hollow thermoplastic microspheres, the improvement comprising: A. providing said thermoplastic microspheres with a coating of a surfactant which preferentially wets the surface of

In a plastisol composition comprising a thermoplastic resin, a plasticizer for said resin, an optional inert filler and hollow thermoplastic microspheres, the improvement comprising: A. providing said thermoplastic microspheres with a coating of a surfactant which preferentially wets the surface of said microspheres, in an aamount sufficient to substantially completely coat the surface of said microspheres; and B. combining said microspheres and said optional inert filler into said plastisol formulation in a proportion which does not exceed the critical pigment volume concentration of said plastisol.