The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 1996
Filed:
Feb. 14, 1995
Applicant:
Inventors:
Assignee:
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
428349 ; 428519 ; 428520 ; 428521 ; 428522 ; 428 368 ; 525 71 ; 525 80 ; 525 87 ; 525 89 ; 525 94 ; 525227 ; 5263285 ; 5263295 ; 5263297 ; 53477 ; 53485 ;
Abstract
The invention relates to a recycable, heat-sealable plastic film for hermetically sealing plastic containers, comprising at least two layers which mutually adhere, (i) a support layer comprised of an impact resistant polystyrene resin and (ii) a sealing layer consisting essentially of: a) 20-100 weight % of a copolymer P consisting essentially of: (p1) 20-90 weight % methyl methacrylate and/or ethyl methacrylate; (p2) 10-80 weight % of at least one monomer of formula I ##STR1## where R.sub.1 represents an C.sub.3-24 alkyl group; and (p3) 0-10 weight %, preferably 1-8 weight %, of a monomer which is copolymerizable with and different from the monomers (p1) and (p2); and