18-07-2019 дата публикации
Номер: US20190218419A1
Принадлежит:
A method for dielectrically heating foamable composition to foam and set the composition is described. In particular, radio frequency (RF) heating is used to heat the foamable composition to provide insulation in the manufacture of an article. 2. The method of claim 1 , wherein the water-based polymer is selected from the group consisting of emulsion-based polymer selected from the group consisting of starch claim 1 , vinyl acetate ethylene dispersion claim 1 , polyvinyl acetate claim 1 , polyvinyl acetate polyvinyl alcohol claim 1 , dextrin stabilized polyvinyl acetate claim 1 , polyvinyl acetate copolymers claim 1 , vinyl acetate-ethylene copolymers claim 1 , vinylacrylic claim 1 , styrene acrylic claim 1 , acrylic claim 1 , styrene butyl rubber claim 1 , polyurethane and mixtures thereof.3. The method of claim 1 , wherein the expandable microspheres have a hydrocarbon core and a polyacrylonitrile shell.4. The method of claim 1 , wherein the additive is selected from the group consisting of plasticizer claim 1 , tackifiers claim 1 , humectants claim 1 , preservatives claim 1 , e.g. claim 1 , antioxidant claim 1 , biocide; filler claim 1 , pigment claim 1 , dye claim 1 , stabilizer claim 1 , rheology modifier claim 1 , polyvinyl alcohol claim 1 , and mixtures thereof.5. The method of claim 1 , further comprising defoamer claim 1 , preservative claim 1 , surfactant claim 1 , rheology modifier claim 1 , filler claim 1 , pigment claim 1 , dye claim 1 , stabilizer claim 1 , polyvinyl alcohol claim 1 , humectant claim 1 , and mixtures thereof.6. The method of claim 1 , wherein the composition further comprises an accelerator that is a multivalent water-soluble salt.7. The method of claim 6 , wherein the accelerator is selected from the group consisting of aluminum nitrate claim 6 , zirconium acetate claim 6 , ammonium zirconyl carbonate and mixtures thereof.8. The method of claim 1 , wherein the dielectric heating is radio frequency heating.9. The method of claim 9 , ...
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