Endothermic blowing agents compositions and applications

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter

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521 57, 521 91, 252350, B32B 516

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active

053024559

ABSTRACT:
A stabilized powdered endothermic blowing agent which is a mixture of polycarboxylic acid and an inorganic carbonate, the polycarboxylic acid and the inorganic carbonate each having been surface treated with a component which prevents water from being absorbed thereby. The blowing agent is incorporated into a composition for producing foamed products. Additives may be added to the composition which function in conjunction with the blowing agent to cause surface migration of the additives and/or improve weld line strength of the foamed products.

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patent: 4614648 (1986-09-01), Bru
patent: 4623478 (1986-11-01), Pastorino

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