Moldable-foam moldings composed of expandable pelletized filled polymer materials
First Claim
1. A moldable-foam molding with a density from 8 to 200 g/l, obtainable via fusion of prefoamed foam beads comprising expandable pelletized thermoplastic polymer materials, wherein the pelletized polymer materials comprise from 1 to 50% by weight, of one or more fillers selected from the group consisting of talc, chalk, kaolin, aluminum hydroxide, magnesium hydroxide, aluminum nitrite, aluminum silicate, calcium carbonate, calcium sulfate, silica, powdered quartz, Aerosil, alumina and glass beads.
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Accused Products
Abstract
Moldable-foam moldings whose density is in the range from 8 to 200 g/l, obtainable via fusion of prefoamed foam beads composed of expandable pelletized filled thermoplastic polymer materials, and a process for preparing the expandable pelletized polymer materials.
49 Citations
17 Claims
- 1. A moldable-foam molding with a density from 8 to 200 g/l, obtainable via fusion of prefoamed foam beads comprising expandable pelletized thermoplastic polymer materials, wherein the pelletized polymer materials comprise from 1 to 50% by weight, of one or more fillers selected from the group consisting of talc, chalk, kaolin, aluminum hydroxide, magnesium hydroxide, aluminum nitrite, aluminum silicate, calcium carbonate, calcium sulfate, silica, powdered quartz, Aerosil, alumina and glass beads.
- 7. An expandable pelletized thermoplastic polymer material which comprises from 5 to 50% by weight of one or more fillers selected from the group consisting of talc, chalk, kaolin, aluminum hydroxide, aluminum nitrite, aluminum silicate, calcium carbonate, calcium sulfate, silica, powdered quartz, Aerosil, alumina and glass beads.
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10. A process for preparing expandable pelletized thermoplastic polymer materials, comprising the steps of
a) incorporating an organic blowing agent and from 5 to 50% by weight of a filler into a polymer melt using a static or dynamic mixer at a temperature of at least 150° - C.,
b) cooling the polymer melt to a temperature of 120°
C. or less,c) discharge via a die plate with holes whose diameter is at most 1.5 mm, and d) pelletizing the melt downstream of the die plate under water at a pressure from 1 to 20 bar.
- C.,
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13. A moldable-foam molding prepared by a process comprising:
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providing prefoamed foam beads, wherein the foam beads comprise polymer materials and from 5 to 30% by weight of one or more fillers selected from the group consisting of talc, chalk, kaolin, aluminum hydroxide, magnesium hydroxide, aluminum nitrite, aluminum silicate, calcium carbonate, calcium sulfate, silica, powdered quartz, Aerosil, alumina and glass beads, the prefoamed foam beads having been exposed using hot air or steam; and
fusing the prefoamed foam beads in a closed mold, wherein the density of the molding is from 8 to 200 g/l. - View Dependent Claims (14, 15, 16, 17)
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Specification