US4348455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic food wrapping film having improved cling
Assignee: Mobil Oil AS
•
Filing: 1981-03-16
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Granted: 1982-09-07
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Expires: 2001-03-16
Abstract
Abstract The shear strength cling of thermoplastic food wrap film is improved by coating at least one surface of the film with a composition comprising a major proportion of an alkali metal dialkyl sulfosuccinate and a minor proportion of a high boiling moisturizing liquid.
Inventors
- 👤 William J. Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:11
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J7/044; C08J7/046; C08J7/054; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/27; Y10T428/273; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
96 words
A transparent, flexible, thermoplastic, food wrap film having improved shear strength cling, said film comprising having a coating on at least one surface thereof of a composition comprising (a) about 80-95 weight percent of at least one alkali metal dialkyl sulfosuccinate of the formula: ##STR2## wherein R is alkyl containing 4-18 carbon atoms and M is an alkali metal and (b) about 5-20 weight percent of a lower alcohol soluble high boiling moisturizing liquid selected from the group consisting of dihydric alcohols, trihydric alcohols, higher polyhydric alcohols, esters of adipic acid and esters of phthalic acid.
Claim 2
Dependent Claim
96 words
A transparent, flexible, thermoplastic, food wrap film having improved shear strength cling, said film comprising having a coating on at least one surface thereof of a composition comprising (a) about 80-95 weight percent of at least one alkali metal dialkyl sulfosuccinate of the formula: ##STR2## wherein R is alkyl containing 4-18 carbon atoms and M is an alkali metal and (b) about 5-20 weight percent of a lower alcohol soluble high boiling moisturizing liquid selected from the group consisting of dihydric alcohols, trihydric alcohols, higher polyhydric alcohols, esters of adipic acid and esters of phthalic acid.
Claim 3
Dependent Claim
29 words
The film according to claim 1, wherein said composition comprises about 90% by weight of said alkali metal dialkyl sulfosuccinate and about 10% by weight of said moisturizing liquid.
Claim 4
Dependent Claim
12 words
The film according to claim 1, wherein said moisturizing liquid is glycerol.
Claim 5
Dependent Claim
12 words
The film according to claim 1, wherein said alkali metal is sodium.
Claim 6
Dependent Claim
14 words
The film according to claim 1, wherein R is C 6 -C 13 alkyl.
Claim 7
Dependent Claim
27 words
The film according to claim 1, wherein said film comprises plasticized polyvinyl chloride, polyvinylidene chloride copolymers, polybutene, low density polyethylene or copolymers of said low density polyethylene.
Claim 8
Dependent Claim
19 words
The film according to claim 1, wherein the thickness of said coating is 1.2×10 -2 to 3.6×10 -2 mils.
Claim 9
Dependent Claim
97 words
A process of increasing the shear strength cling of a transparent, flexible, thermoplastic, food wrap film comprising coating at least one surface of said film with a composition comprising (a) about 80-95 weight percent of at least one alkali metal dialkyl sulfosuccinate of the formula: ##STR3## wherein R is alkyl containing 4-18 carbon atoms and M is an alkali metal, and (b) about 5-20 weight percent of a lower alcohol soluble high boiling moisturizing liquid selected from the group consisting of dihydric alcohols, trihydric alcohols, higher polyhydric alcohols, esters of adipic acid and esters of phthalic acid.
Claim 10
Dependent Claim
97 words
A process of increasing the shear strength cling of a transparent, flexible, thermoplastic, food wrap film comprising coating at least one surface of said film with a composition comprising (a) about 80-95 weight percent of at least one alkali metal dialkyl sulfosuccinate of the formula: ##STR3## wherein R is alkyl containing 4-18 carbon atoms and M is an alkali metal, and (b) about 5-20 weight percent of a lower alcohol soluble high boiling moisturizing liquid selected from the group consisting of dihydric alcohols, trihydric alcohols, higher polyhydric alcohols, esters of adipic acid and esters of phthalic acid.
Claim 11
Dependent Claim
29 words
The process according to claim 8, wherein said composition comprises about 90% by weight of said alkali metal dialkyl sulfosuccinate and about 10% by weight of said moisturizing liquid.
Claim 12
Dependent Claim
12 words
The process according to claim 8, wherein said moisturizing liquid is glycerol.
Claim 13
Dependent Claim
12 words
The process according to claim 8, wherein said alkali metal is sodium.
Claim 14
Dependent Claim
14 words
The process according to claim 8, wherein R is C 6 -C 13 alkyl.
Claim 15
Dependent Claim
27 words
The process according to claim 8, wherein said film comprises plasticized polyvinyl chloride, polyvinylidene chloride copolymers, polybutene, low density polyethylene or copolymers of said low density polyethylene.
Claim 16
Dependent Claim
19 words
The process according to claim 8, wherein the thickness of said coating is 1.2×10 -2 to 3.6×10 -2 mils.
Claim 17
Dependent Claim
21 words
The process according to claim 8, wherein said composition is deposited on said film from a solution in a lower alcohol.
Claim 18
Dependent Claim
19 words
The process according to claim 15, wherein said solution comprises 80-99% and 1-20% of said coating composition by volume.
Claim 19
Dependent Claim
21 words
The process according to claim 16, wherein said alcohol is selected from the group consisting of ethyl alcohol and isopropyl alcohol.
Claim 20
Dependent Claim
26 words
The process according to claim 17, wherein said alkali metal dialkyl sulfosuccinate is di-2-ethylhexyl sulfosuccinate, said moisturizing liquid is glycerol and said alcohol is isopropyl alcohol.
Claim 21
Dependent Claim
29 words
The process according to claim 18, wherein said di-2-ethylhexyl sulfosuccinate and glycerol in a weight ratio of 90:10 are dissolved in isopropyl alcohol in a 2% concentration by volume.
References Cited (Backward Citations)
US3070462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |