Back to results
US 5,180,634 AGranted
Coextruded multilayer and a process for preparing the same
AssigneeElf Atochem Italia S.r.l.
InventorsCarlo Sempio, Andrea Anghileri, Marc Binaghi, Tullo Ronchetti, Italo Vailati
Life of this patent
Estimating the term…
Abstract
Coextruded multilayer sheets comprising a first outer layer consisting of a blend containing polyvinylidene fluoride having an average mollecular weight (Mw) not higher than 250,000 and an acrylic resin and at least a layer of a homo or copolymer of an alkylmethacrylate, having a Vicat degree (49N, 50.degree. C/h) of at least 90.degree. C., in mixture with 5-40% by weight of an elastomer in the grafted form.
Claims12
Multilayer coextruded sheets comprising:
- a) a first outer layer consisting of a blend containing 40-70% by weight of polyvinylidene fluoride having an average molecular weight (Mw) not higher than 250.000, 30-60% by weight of a homo or copolymer of an alkylmethacrylate and 10-30% by weight, with respect to the sum of the preceding components, of an elastomer in the grafted form;
- b) at least a layer of a homo or copolymers of an alkyl=methacrylate admixture with 5-40% by weight of an elastomer in the grafted form;
- and
- c) optionally at least an intermediate layer between (a) and (b) of a homo or copolymer of an alkylmethacrylate.
1 more element
Multilayer coextruded sheets comprising:
- a') a first outer layer consisting of a blend containing 50-70% by weight of polyvinylidene fluoride having an average molecular weight (Mw) not higher than 250.000 and 30-50% by weight of a homo or copolymer of an alkylmethacrylate;
- b') at least a layer of a homo or copolymer of an alkylmethacrylate admixture with 5-40% by weight of an elastomer in the grafted form;
- and
- c') optionally at least an intermediate layer between (a') and (b') of a homo or copolymer of an alkylmethacrylate.
1 more element
Dependencies are inferred from the claim text.