Chemically embossed metallocene polyethylene foam
AssigneeArmstrong World Industries, Inc.
InventorsLi-Ying T. Yang, Martin Dees
Life of this patent
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Abstract
A textured metallocene polyethylene foam sheet suitable for use in a floor covering is made using a highly co-activated azodicarbonamide package which blows the metallocene polyethylene effectively. The preferred co-activators are zinc oxide and urea. The textured surface of metallocene polyethylene foam is formed by a chemical embossing process which utilizes a liquid triazole having an alkyl moiety as a foam-expansion inhibitor. The triazole is dissolved in a non-polar solvent to form the foam inhibitor. The preferred inhibitor is a hydrocarbon which may be halogenated.
Claims7
A printing ink composition comprising a resin, a non-polar solvent and a blowing agent inhibitor, the inhibitor being a compound having the general formula
- wherein R is hydrogen, one or more aliphatic moieties containing up to 20 carbon atoms, one or more cycloaliphatic moieties containing from 3 to 20 carbon atoms, or one or more aryl or substituted aryl groups containing from 6 to 30 carbon atoms, R1 and R2 are the same or different and each is an aliphatic moiety containing from 2 to 20 carbon atoms or an aryl or substituted aryl moiety containing from 6 to 30 carbon atoms.
Dependencies are inferred from the claim text.