EP0339990A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Compositions comprising a but-1-ene polymer and a high density polyethylene
Assignee: Mitsui Chemicals Inc
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Filing: 1989-04-27
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Granted: —
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Expires: 2009-04-27
Abstract
Abstract Compositions comprising a minor weight proportion of a but-1-ene polymer having an average molecular weight of at least 100,000 and a major weight proportion of an optionally modified high density polyethylene can be used to provide films or sheets and laminar structures which can be heat sealed to provide retortable peelable seals.
Inventors
- 👤 Charles C. Hwo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 01:50
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/06; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L51/00; C08L51/06; C09J151/00; C09J151/06; C08L23/18; C08L23/20; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A composition which comprises (i) from 8% to 49% by weight of a homopolymer or copolymer of but-1-ene having an average molecular weight of at least 100,000 and (ii) from 92% to 51% by weight of a modified or non-modified high density polyethylene having a density of at least 941 kgm⁻³.
Claim 2
Dependent Claim
51 words
A composition which comprises (i) from 8% to 49% by weight of a homopolymer or copolymer of but-1-ene having an average molecular weight of at least 100,000 and (ii) from 92% to 51% by weight of a modified or non-modified high density polyethylene having a density of at least 941 kgm⁻³.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 which comprises 10% to 30% by weight of (i) and 90% to 70% by weight of (ii).
Claim 4
Dependent Claim
23 words
A composition according to claim 1 which comprises 12% to 15% by weight of (i) and 88% to 85% by weight of (ii).
Claim 5
Dependent Claim
21 words
A composition according to claim 1, 2 or 3 wherein said modified high density polyethylene has been functionalized with maleic anhydride.
Claim 6
Dependent Claim
26 words
A film or sheet for use in forming retortable peel seals which comprises a composition as claimed in claim 1 and which is optionally biaxially oriented.
Claim 7
Dependent Claim
26 words
A laminar structure comprising a first substrate to which a film or sheet as claimed in claim 5 has been bonded by extrusion lamination or coextrusion.
Claim 8
Dependent Claim
31 words
A laminar structure according to claim 6, wherein the first substrate is a polyamide and an optional tie layer adhesive is disposed between said film or sheet and said first substrate.
Claim 9
Dependent Claim
18 words
A laminar structure according to claim 7 wherein the tie layer adhesive comprises a modified high density polyethylene.
Claim 10
Dependent Claim
12 words
A laminar structure according to claim 7 which comprises a second substrate.
Claim 11
Dependent Claim
18 words
A laminar structure according to claim 9 wherein the second substrate is of high density polyethylene or polypropylene.
References Cited (Backward Citations)
No citation records indexed.
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