Patent US4800115A successfully refreshed from Google Patents.
US4800115A
Expired / Lapsed
US
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Agent for imparting antistatic characteristics to a thermoplastic polymer and a thermoplastic polymer composition containing the agent
Assignee: WR Grace and Co Conn
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Filing: 1986-10-14
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Granted: 1989-01-24
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Expires: 2006-10-14
Abstract
Abstract Disclosed is a thermoplastic plymeric composition having antistatic characteristics and a method to make same. The composition comprises a thermoplastic polymer in admixture with an antistatic agent. In one embodiment the polymer is polyethylene and the agent is a mixture of polyethoxylated cetyl alcohol and glyceryl monostearate. Also disclosed is the antistatic polymeric composition in a film, which is useful for packaging static sensitive devices such as electronic circuit boards, or for packaging devices that must be protected from static electricity such as devices in a medical operating room where explosive oxygen and/or ether are present.
Inventors
- 👤 Marvin R. Havens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103; C08K5/06; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/0846; C08L23/0853; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08L71/00; C08L71/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/922; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24628; Y10T428/24661; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249978; Y10T428/249979; Y10T428/24998; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
An antistatic film having one or more layers wherein at least one layer comprises a composition of a thermoplastic polymer in admixture with an antistatic agent, wherein said polymer is polyethylene and said antistatic agent is a mixture of both fatty acid ester of polyhydroxy alcohol and polyalkoxylated compound and said film will, after 88 hours abuse at 71° C. in a dry or humid oven as well as after 88 hours at 72° F. (22° C.) at 15% relative humidity, still exhibit antistatic characteristics by having a static decay time within 2000 milliseconds at low humidity less than about 15% relative humidity.
Claim 2
Dependent Claim
103 words
An antistatic film having one or more layers wherein at least one layer comprises a composition of a thermoplastic polymer in admixture with an antistatic agent, wherein said polymer is polyethylene and said antistatic agent is a mixture of both fatty acid ester of polyhydroxy alcohol and polyalkoxylated compound and said film will, after 88 hours abuse at 71° C. in a dry or humid oven as well as after 88 hours at 72° F. (22° C.) at 15% relative humidity, still exhibit antistatic characteristics by having a static decay time within 2000 milliseconds at low humidity less than about 15% relative humidity.
Claim 3
Dependent Claim
19 words
The film of claim 1, wherein said film has been irradiated at a dosage up to about 12 MR.
Claim 4
Dependent Claim
10 words
The film of claim 1, wherein said film is oriented.
Claim 5
Dependent Claim
106 words
The antistatic film of claim 1, comprising at least two layers, one or more of said at least two layers comprising a composition of a thermoplastic polymer in admixture with an antistatic agent, wherein said composition comprises a polyethylene in admixture with both fatty acid ester of polyhydroxy alcohol and polyalkoxylated compound and said film will, after 88 hours abuse at 71° C. in a dry or humid oven as well as after 88 hours at 72° F. (22° C.) at 15% relative humidity, still exhibit antistatic characteristics by having a static decay time within 2000 milliseconds at low humidity less than about 15% relative humidity.
Claim 6
Dependent Claim
96 words
A multiply air cushion film having antistatic characteristics comprising at least the multilayer structure: polyethylene/polyethylene wherein each polyethylene layer comprises polyethylene in admixture with an antistatic agent that is a mixture of both fatty acid ester of polyhydroxy alcohol and polyalkoxylated compound and said film will, after 88 hours abuse at 71° C. in a dry or humid oven as well as after 88 hours at 72° F. (22° C.) at 15% relative humidity, still exhibit antistatic characteristics by having a static decay time within 2000 milliseconds at low humidity less than about 15% relative humidity.
Claim 7
Dependent Claim
96 words
A multiply air cushion film having antistatic characteristics comprising at least the multilayer structure: polyethylene/polyethylene wherein each polyethylene layer comprises polyethylene in admixture with an antistatic agent that is a mixture of both fatty acid ester of polyhydroxy alcohol and polyalkoxylated compound and said film will, after 88 hours abuse at 71° C. in a dry or humid oven as well as after 88 hours at 72° F. (22° C.) at 15% relative humidity, still exhibit antistatic characteristics by having a static decay time within 2000 milliseconds at low humidity less than about 15% relative humidity.
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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) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |