US5428094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition
Assignee: Kuraray Co Ltd
•
Filing: 1993-10-21
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Granted: 1995-06-27
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Expires: 2013-10-21
Abstract
Abstract A resin composition comprising an ethylene-vinyl alcohol copolymer (EVOH) having an ethylene content of 20 to 60 mol % and a water-swellable phyllosilicate, said water-swellable phyllosilicate being dispersed in the EVOH with a basal spacing satisfying the following condition (I) (x-y)>/=2(I) wherein x represents the basal spacing in angstrom of the water-swellalble phyllosilicate dispersed in EVOH and y represents the basal spacing in angstrom of dry powder of the water-swellable phyllosilicate. The resin compositions of the invention are useful in the manufacture of plastic films and containers for food packaging.
Inventors
- 👤 Makio Tokoh
- 👤 Satoshi Hirofuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:03
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A resin composition comprising a saponified ethylene-vinyl acetate copolymer (EVOH) having an ethylene content of 20 to 60 mol % and a saponification degree of at least 95 mol % and at least one water-swellable phyllosilicate in an amount of 0.05 to 30 % by weight based on the weight of EVOH, said water-swellable phyllosilicate, in the form of an aqueous colloidal dispersion, having been uniformly dispersed in the EVOH in the presence of water or water and an alcohol, with a basal spacing satisfying the following condition: (X-Y)≧2 wherein X represents the basal spacing in angstroms of the water-swellable phyllosilicate dispersed in EVOH and Y represents the basal spacing in angstroms of the water-swellable phyllosilicate as a dry powder, said resin composition having substantially no localized aggregates which can be observed with an optical microscope (magnification: 10) on the surface of a film obtained therefrom.
Claim 2
Dependent Claim
146 words
A resin composition comprising a saponified ethylene-vinyl acetate copolymer (EVOH) having an ethylene content of 20 to 60 mol % and a saponification degree of at least 95 mol % and at least one water-swellable phyllosilicate in an amount of 0.05 to 30 % by weight based on the weight of EVOH, said water-swellable phyllosilicate, in the form of an aqueous colloidal dispersion, having been uniformly dispersed in the EVOH in the presence of water or water and an alcohol, with a basal spacing satisfying the following condition: (X-Y)≧2 wherein X represents the basal spacing in angstroms of the water-swellable phyllosilicate dispersed in EVOH and Y represents the basal spacing in angstroms of the water-swellable phyllosilicate as a dry powder, said resin composition having substantially no localized aggregates which can be observed with an optical microscope (magnification: 10) on the surface of a film obtained therefrom.
Claim 3
Dependent Claim
38 words
A resin composition according to claim 1 wherein the phyllosilicate is a multilayered water-swellable phyllosilicate comprising a layer of a sheet-like structure of a Si-O tetrahedron and a layer of a sheet-like structure of Al-O or Mg-O octahedron.
Claim 4
Dependent Claim
25 words
A resin composition according to claim 2, wherein the water-swellable phyllosilicate is selected from the group consisting of smectite, vermiculite, synthetic micas, and mixtures thereof.
Claim 5
Dependent Claim
27 words
A resin composition according to claim 3, wherein the smectite is selected from the group consisting of montmorillonite, beidellite, nontronite, saponite, hectorite, sauconite stevensite and mixtures thereof.
Claim 6
Dependent Claim
13 words
A resin composition according to claim 4, wherein the water-swellable phyllosilicate is montmorillonite.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |