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US 4,399,249 AGranted
Resealable pressure sensitive adhesives and products
AssigneeEschem Inc.
InventorLeon L. Bildusas
Life of this patent
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AssigneeEschem Inc.
InventorLeon L. Bildusas
Estimating the term…
Pressure sensitive adhesive compositions are provided that are especially suitable for forming contact bonds that are resealable to polyethylene surfaces at room temperature. Such adhesive compositions include a blend of a linear or a radial block copolymer, an end-block modifying resin compatible with the end or thermoplastic block of the copolymer and incompatible with the mid of elastomeric block, a plasticizing process oil compatible with the mid or elastomeric block, and, only if desired, not more than about 14 weight percent of a mid block or elastomeric block associating or modifying resin compatible with the mid or elastomeric block and incompatible with the end or thermoplastic block. A particularly advantageous utilization of these compositions is as a releasable and resealable sealing strip for thin-walled storage or sandwich bag products made of a polyolefin film.
A resealable and releasable pressure sensitive adhesive composition comprising:
A method of providing a resealable and releasable pressure sensitive adhesive composition, comprising blending together an admixture including:
The method of claim 18, wherein said end block modifying resin is a thermoplastic, non-elastomeric resin and said mid block modifying tackifying resin is an elastomeric resin.
Dependencies are inferred from the claim text.