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 20:13
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.
References Cited (Backward Citations)
US3022543A
Cited
US3164481A
Cited
US3821182A
Cited
US4048428A
Cited
US3220985A
Cited
US3425981A
Cited
US3441552A
Cited
US3576649A
Cited
US3741253A
Cited
US3937758A
Cited
US4117193A
Cited
US4268583A
Cited
US4194039A
Cited
US4188443A
Cited
US4274900A
Cited
US4229241A
Cited
US4600743A
Cited
US4494651A
Cited
US4554210A
Cited
US4551380A
Cited
US4576669A
Cited
US4579516A
Cited
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 |