US4234664A
Expired / Lapsed
US
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Oriented polyolefin film
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-03-30
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Granted: 1980-11-18
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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 an aqueous solution of an 'Ethoquad' salt (e.g. 'Ethoquad' C/12) before heating and stretching the extrudate to orient it. The corresponding tertiary amine chlorides (e.g. prepared from 'Ethomeen' T/12) are not effective.
Inventors
- 👤 Brian N. Hendy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:37
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
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
An oriented polyolefin film comprising a polyolefin substrate having on at least one surface thereof a mixture comprising: (a) a quaternary ammonium salt of the formula: ##STR3## wherein X is a univalent anion or an equivalent of a multivalent anion, x and y are positive integers the sum of which is from 2 to 5, A is a lower alkyl group containing from 1 to 6 carbon atoms, and R is a univalent aliphatic radical containing from 1 to 22 carbon atoms, and (b) a monoethoxylated quaternary ammonium salt.
Claim 2
Dependent Claim
89 words
An oriented polyolefin film comprising a polyolefin substrate having on at least one surface thereof a mixture comprising: (a) a quaternary ammonium salt of the formula: ##STR3## wherein X is a univalent anion or an equivalent of a multivalent anion, x and y are positive integers the sum of which is from 2 to 5, A is a lower alkyl group containing from 1 to 6 carbon atoms, and R is a univalent aliphatic radical containing from 1 to 22 carbon atoms, and (b) a monoethoxylated quaternary ammonium salt.
Claim 3
Dependent Claim
36 words
A film according to claim 1 wherein the quaternary ammonium salts (a) and (b) are present on the surface in an amount sufficient to yield a surface resistivity not exceeding 10 gigohms at 50% relative humidity.
Claim 4
Dependent Claim
28 words
A film according to claim 1 wherein R in the formula of the quaternary ammonium salt is a coconut oil residue and is predominantly composed of dodecyl radicals.
Claim 5
Dependent Claim
27 words
A film according to claim 1 wherein R in the formula of the quaternary ammonium salt is derived from oleine and is predominantly composed of oleyl radicals.
Claim 6
Dependent Claim
24 words
A film according to claim 1 wherein X is chlorine, the sum of x and y is 2, and A is a methyl group.
Claim 7
Dependent Claim
14 words
A film according to claim 1 wherein the salt of (b) is choline chloride.
Claim 8
Dependent Claim
16 words
A film according to claim 1 wherein the substrate comprises a substantially crystalline polymer of propylene.
Claim 9
Dependent Claim
51 words
A film according to claim 1 wherein the substrate is a multiple-layer substrate having a propylene layer and at least one surface 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)
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Cited
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US2832697A
Cited
GB1403582A
Cited
US3914496A
Cited
US4117193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |