Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer

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United States of America Patent

PATENT NO 11339264
APP PUB NO 20200165403A1
SERIAL NO

16630528

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A chemical blowing agent for foaming a thermoplastic polymer, for example PVC plastisol or a polymer resin in an extrusion process, said chemical blowing agent comprising a functionalized particulate bicarbonate containing at least one polyoxyalkylene additive, preferably excluding an exothermic blowing agent. The polyoxyalkylene additive may be selected from the group consisting of polyoxyalkylenes, any derivative thereof, salts thereof, and any combinations thereof. The particulate bicarbonate may be preferably functionalized by spray-coating, extrusion or co-grinding with at least one polyoxyalkylene additive. The functionalized particulate bicarbonate may comprise 50 wt % to less than 100 wt % of the bicarbonate component, and 0.02-50 wt % of the additive. The functionalized particulate bicarbonate may further comprise 0.1-5 wt % silica. A foamable polymer composition comprising such chemical blowing agent. A process for manufacturing a foamed polymer, such as foamed PVC, comprising shaping and heating the foamable polymer composition, and a foamed polymer obtained by such process.

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Patent Owner(s)

  • SOLVAY SA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dupont, Camille Louise Adrienne Blainville-sur-l'eau, FR 1 0
Kabbabe, Malave Jorge Alejandro Bourg-la-Reine, FR 8 3
Pascal, Jean-Philippe Villers les Nancy, FR 20 61

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