Patent US4615941A successfully refreshed from Google Patents.
US4615941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opaque pearlescent films containing dispersed incompatible polymer and polymeric interfacial agent
Assignee: Mobil Oil AS
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Filing: 1984-12-27
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Granted: 1986-10-07
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Expires: 2004-12-27
Abstract
Abstract Opaque pearlescent polymer films, e.g., polypropylene, containing finely dispersed particles of an incompatible polymer e.g., nylon, are improved by blending a polymeric interfacial agent with the film polymer and the incompatible polymer to give a film having the incompatible polymer dispersed in smaller spherical particles and reduced stringness.
Inventors
- 👤 Pang-Chia Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:05
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08J; C08J5/00; C08J5/18; C08L23/12; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08L2205/00; C08L2205/03; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/0869; C08L23/0876; C08L51/00; C08L51/06; C08L67/00; C08L77/00; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
100 words
In an opaque to translucent, biaxially oriented melt extruded polymeric film comprising a continous phase of a polyolefin first polymer; and a discontinuous dispersed phase of a finely divided second polymer comprising a polyamide or polyester which is incompatible with said first polymer comprising a polyolefin; the improvement comprising including in said film a third polymer comprising a copolymer of ethylene and a carboxyl containing monomer or a salt thereof as an interfacial agent in an amount sufficient to disperse said second polymer in smaller particles with fewer stringy particles than in the film made without said polymeric interfacial agent.
Claim 2
Dependent Claim
100 words
In an opaque to translucent, biaxially oriented melt extruded polymeric film comprising a continous phase of a polyolefin first polymer; and a discontinuous dispersed phase of a finely divided second polymer comprising a polyamide or polyester which is incompatible with said first polymer comprising a polyolefin; the improvement comprising including in said film a third polymer comprising a copolymer of ethylene and a carboxyl containing monomer or a salt thereof as an interfacial agent in an amount sufficient to disperse said second polymer in smaller particles with fewer stringy particles than in the film made without said polymeric interfacial agent.
Claim 3
Dependent Claim
16 words
The film of claim 1 having a transparent, thermoplastic coating on at least one surface thereof.
Claim 4
Dependent Claim
19 words
The film of claim 1 in which said second polymer has a higher melting point than said first polymer.
Claim 5
Dependent Claim
12 words
The film of claim 1 in which said first polymer is polypropylene.
Claim 6
Dependent Claim
13 words
The film of claim 4 in which said second polymer is a polyamide.
Claim 7
Dependent Claim
11 words
The film of claim 5 in which said polyamide is nylon-6.
Claim 8
Dependent Claim
20 words
The film of claim 5 in which said average particle size of said second polymer is less than 8 microns.
Claim 9
Dependent Claim
16 words
The film of claim 5 having a transparent, thermoplastic coating on at least one surface thereof.
Claim 10
Dependent Claim
13 words
The film of claim 1 in which said second polymer is a polyamide.
Claim 11
Dependent Claim
11 words
The film of claim 9 in which said polyamide is nylon-6.
Claim 12
Dependent Claim
20 words
The film of claim 9 in which said average particle size of said second polymer is less than 8 microns.
Claim 13
Dependent Claim
16 words
The film of claim 9 having a transparent, thermoplastic coating on at least one surface thereof.
Claim 14
Dependent Claim
13 words
The film of claim 1 in which said second polymer is a polyester.
Claim 15
Dependent Claim
20 words
The film of claim 5 in which said average particle size of said second polymer is less than 8 microns.
Claim 16
Dependent Claim
16 words
The film of claim 13 having a transparent, thermoplastic coating on at least one surface thereof.
Claim 17
Dependent Claim
20 words
The film of claim 1 in which said average particle size of said second polymer is less than 8 microns.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |