Patent US4686148A successfully refreshed from Google Patents.
US4686148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylidene chloride composition and film made therefrom
Assignee: Cryovac LLC
•
Filing: 1985-07-15
•
Granted: 1987-08-11
•
Expires: 2005-07-15
Abstract
Abstract This invention relates to films made from vinylidene chloride polymers or copolymers. Specifically, this invention relates to a method and composition for lowering the oxygen permeability and enhancing the thermal stability of mono-layer and multi-layer packaging films having a plasticized layer of vinylidene chloride copolymer film.
Inventors
- 👤 Marvin R. Havens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08K5/15; C08K5/151; C08K5/1515; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
45 words
An extrudable vinylidene chloride polymeric composition comprising: (a) 1.0% to 8.0% by weight of a plasticizer; (b) 0.5% to 2.0% by weight of glycerin; and, (c) the balance comprising at least one vinylidene chloride copolymer wherein the major portion of the copolymer is vinylidene chloride.
Claim 2
Dependent Claim
45 words
An extrudable vinylidene chloride polymeric composition comprising: (a) 1.0% to 8.0% by weight of a plasticizer; (b) 0.5% to 2.0% by weight of glycerin; and, (c) the balance comprising at least one vinylidene chloride copolymer wherein the major portion of the copolymer is vinylidene chloride.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein the plasticizer content is in the range of 1.0% to 4.0% and wherein the plasticizer is selected from the group consisting of epichlorohydrin/bisphenol A epoxy resin; epoxidized linseed oil; and epoxidized soybean oil.
Claim 4
Dependent Claim
16 words
The composition of claim 1 including 1.0% to 4.0% by weight of 2-ethyl hexyl diphenyl phosphate.
Claim 5
Dependent Claim
12 words
The composition of claim 1 including 0% to 4.0% of tetrasodium pyrophosphate.
Claim 6
Dependent Claim
23 words
The composition of claim 1 comprising by weight: 2% epichlorohydrin/bisphenol A resin; 1% 2-ethyl hexyl diphenyl phosphate; 1% tetrasodium pyrophosphate; and, 1% glycerin.
Claim 7
Dependent Claim
59 words
A multi-layer polymeric film comprising: (a) first and second surface layers; and (b) a vinylidene chloride polymeric layer disposed between said surface layers comprising: (1) 1.0% to 4.0% epichlorohydrin/bisphenol A epoxy resin; (2) 0.5% to 2.0% glycerin; and, (3) the balance comprising at least one vinylidene chloride polymer or vinylidene chloride copolymer wherein the major portion is vinylidene chloride.
Claim 8
Dependent Claim
59 words
A multi-layer polymeric film comprising: (a) first and second surface layers; and (b) a vinylidene chloride polymeric layer disposed between said surface layers comprising: (1) 1.0% to 4.0% epichlorohydrin/bisphenol A epoxy resin; (2) 0.5% to 2.0% glycerin; and, (3) the balance comprising at least one vinylidene chloride polymer or vinylidene chloride copolymer wherein the major portion is vinylidene chloride.
Claim 9
Dependent Claim
16 words
The film of claim 6 wherein the vinylidene chloride layer includes 0 to 4.0% tetrasodium pyrophosphate.
Claim 10
Dependent Claim
21 words
The film of claim 6 wherein the vinylidene chloride layer includes 1% to 4% by weight of 2-ethyl hexyl diphenyl phosphate.
Claim 11
Dependent Claim
12 words
The film of claim 6 wherein said surface layers comprise polyolefin materials.
Claim 12
Dependent Claim
35 words
The film of claim 9 wherein said polyolefin materials are selected from the group consisting of: ethylenevinyl acetate copolymers, branched low density polyethylene, linear low density polyethylene, and very low density polyethylene and blends thereof.
Claim 13
Dependent Claim
17 words
The film of claim 10 wherein at least one layer of the multi-layer film is biaxially oriented.
Claim 14
Dependent Claim
29 words
The film of claim 11 wherein each of the ingredients enumerated in sub-paragraph (b), items (1) through (3), of claim 6 are included, each comprising approximately 1% by weight.
Claim 15
Dependent Claim
14 words
The film of claim 11 wherein two layers of the multi-layer film are oriented.
Claim 16
Dependent Claim
19 words
The film of claim 6 wherein the multi-layer film has been cross-linked to a dosage less than 4.0 MR.
References Cited (Backward Citations)
US2919059A
Cited
US4112181A
Cited
US3741253A
Cited
CA968689A
Cited
US4115334A
Cited
US4161562A
Cited
US4274999A
Cited
US4426477A
Cited
GB2145447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |