Patent · US Active

Cold-sealed, recloseable pack and composition for producing it

US8722829B2 · kind B2 · utility

1Cited by

1References

19Claims

0Family size

Assignee

BASF SE

Inventors

Karl-Heinz Schumacher · Ludwigshafen, DE
Florian Büsch · Speyer, DE
Dieter Urban · Speyer, DE
Cornelis Petrus Beyers · Altrip, DE

Key dates

Filing date	Dec 15, 2010
Grant date	May 13, 2014
Priority date	—
Expiry date	Oct 31, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31935
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Described is a recloseable pack having a cold-sealed layer of adhesive which is recloseable after the pack has been opened, the layer of adhesive comprising an emulsion polymer composed to an extent of at least 60% by weight of principal monomers selected from the group consisting of C1 to C20 alkyl (meth)acrylates, vinyl esters of carboxylic acids comprising up to 20 C atoms, vinylaromatics having up to 20 C atoms, ethylenically unsaturated nitriles, vinyl halides, vinyl ethers of alcohols comprising 1 to 10 C atoms, aliphatic hydrocarbons having 2 to 8 C atoms and one or two double bonds, and mixtures of these monomers, the emulsion polymer being preparable by emulsion polymerization of free-radically polymerizable monomers in the presence of at least one protective colloid. Also described are aqueous polymer dispersions suitable for producing the pack of the invention, and polymer films coated with the polymer dispersions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.