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US 5,317,044 AGranted
Endothermic blowing agents for surface migration of components in foamed products, compositions and applications
AssigneeJ. M. Huber Corporation
InventorsGerry Mooney, Rod A. Garcia, Michael E. Tarquini, John A. Kosin
Life of this patent
Estimating the term…
Abstract
Compositions for producing foamed products which include additives and blowing agents which cause the surface treatment additives to migrate to the surfaces of foamed products. The products produced from the compositions require less additives because the incorporated additives are concentrated at the surfaces thereof.
Claims8
A method for producing a foamed product which comprises:
- (a) selecting a polymer component to be foamed;
- (b) adding an additive to said polymer component together with a blowing agent capable of causing said additives to migrate through said polymer component during a foaming process, said additive comprising both a polycarboxylic acid and a sodium aluminum hydroxy carbonate which have been surface treated with a component selected from the group consisting of mono- and di-glycerides, stearic acid, silane coupling agents, fatty acids, fatty acid salts, hydrotitinates and zirconates and mixtures thereof and;
- (c) subjecting said mixture in step (b) to a foaming process to produce a foamed product, wherein said blowing agent causes said additive to migrate toward surfaces of the foamed product.
Dependencies are inferred from the claim text.