US4241144A
Expired / Lapsed
US
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Antistatic polyolefin films
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-03-30
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Granted: 1980-12-23
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Expires: 1999-03-30
Abstract
Abstract Oriented polyolefin (especially polypropylene) film having antistatic properties is produced by applying to the cast extrudate a solution of an 'Ethomeen' sulphate (e.g. 'Ethomeen' T/12 sulphate) before heating and stretching the extrudate to orient it. The corresponding hydrochlorides are not effective. Inclusion of a quaternary ammonium compound, such as choline chloride, in the solution confers improved antistatic properties.
Inventors
- 👤 Brian N. Hendy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J7/044; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928; Y10T428/31938
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
An antistatic polyolefin film having on at least one surface thereof (1) an amine sulphate of the formula ##STR4## wherein x is a positive integer, y is a positive integer, the sum of x and y is from 2 to 5, and R is a univalent aliphatic radical containing from 8 to 22 carbon atoms and in addition thereto (2) a compound of the formula ##STR5## wherein each of R 1 , R 2 , and R 3 which be the same or different, is a hydrogen atom or a lower alkyl radical containing from 1 to 6 carbon atoms, or R 1 and R 2 are each methylene groupings within a common five- or six-membered saturated heterocyclic ring, Z is a methylene group when R 4 is a hydrogen atom or an acyl radical containing up to 15 carbon atoms, or Z is a carbonyl group when R 4 is a hydrogen atom, and X is an anion of valency n.
Claim 2
Dependent Claim
162 words
An antistatic polyolefin film having on at least one surface thereof (1) an amine sulphate of the formula ##STR4## wherein x is a positive integer, y is a positive integer, the sum of x and y is from 2 to 5, and R is a univalent aliphatic radical containing from 8 to 22 carbon atoms and in addition thereto (2) a compound of the formula ##STR5## wherein each of R 1 , R 2 , and R 3 which be the same or different, is a hydrogen atom or a lower alkyl radical containing from 1 to 6 carbon atoms, or R 1 and R 2 are each methylene groupings within a common five- or six-membered saturated heterocyclic ring, Z is a methylene group when R 4 is a hydrogen atom or an acyl radical containing up to 15 carbon atoms, or Z is a carbonyl group when R 4 is a hydrogen atom, and X is an anion of valency n.
Claim 3
Dependent Claim
14 words
A film according to claim 1 wherein the quaternry ammonium compound is choline chloride.
Claim 4
Dependent Claim
60 words
A film according to claim 1 wherein the film is a multiple-layer film having a substrate layer of a propylene polymer and, on at least one surface of said substrate, a layer of a copolymer of propylene with from 5 to 20% by weight of the copolymer of another alpha-olefin containing from 4 to 10 carbon atoms in its molecule.
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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |