EP0221690A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pigmented, heat-sealable coating composition for application to oriented polyolefin films
Assignee: Mobil Oil AS
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Filing: 1986-10-09
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Granted: —
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Expires: 2006-10-09
Abstract
Abstract A pigmented, heat-sealable coating composition for application to a primer-coated, oriented mono-layer or multi-layer polyolefin film is provided which comprises a blend of (a) a binding and oxygen barrier effective amount of a heat-sealable polyvinylidene chloride homopolymer and/or polyvinylidene chloride copolymer containing at least 50 weight percent copolymerized vinylidene chloride, (b) an amount of wax sufficient to result in a significant reduction in the coefficient of friction of a film to which the coating composition is applied and (c) an amount of pigment sufficient to result in a significant reduction in the light transmission property of a film to which the coating composition is applied. Oriented polyolefin films coated with the foregoing compositions possess excellent seal strength and hot tack properties, good blocking resistance, low coefficient of friction, low oxygen transmission rate and low light transmission.
Inventors
- 👤 Leland Li-Jen Liu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 13:16
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/205; B32B27/30; B32B27/304; B32B3/00; B32B3/26; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/048; C08J7/052; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/08; B32B2270/00; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/40; B32B2307/402; B32B2307/4026; B32B2307/50; B32B2307/514; B32B2323/00; B32B2323/10; B32B2391/00; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2822; Y10T428/2826; Y10T428/31504; Y10T428/31801; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A pigmented, heat-sealable coating composition for application to a primer-coated, oriented mono-layer or multi-layer polyolefin film which comprises a blend of (a) a binding and oxygen barrier effective amount of a heat-sealable polyvinylidene chloride homopolymer and/or polyvinylidene chloride copolymer containing at least 50 weight percent copolymerized vinylidene chloride, (b) an amount of wax sufficient to result in a significant reduction in the coefficient of friction of a film to which the coating composition is applied and (c) an amount of pigment sufficient to result in a significant reduction in the light transmission property of a film to which the coating composition is applied.
Claim 2
Dependent Claim
103 words
A pigmented, heat-sealable coating composition for application to a primer-coated, oriented mono-layer or multi-layer polyolefin film which comprises a blend of (a) a binding and oxygen barrier effective amount of a heat-sealable polyvinylidene chloride homopolymer and/or polyvinylidene chloride copolymer containing at least 50 weight percent copolymerized vinylidene chloride, (b) an amount of wax sufficient to result in a significant reduction in the coefficient of friction of a film to which the coating composition is applied and (c) an amount of pigment sufficient to result in a significant reduction in the light transmission property of a film to which the coating composition is applied.
Claim 3
Dependent Claim
23 words
The coating composition of Claim 1 wherein polyvinylidene chloride copolymer component (a) contains from 75% to 92% by weight of copolymerized vinylidene chloride.
Claim 4
Dependent Claim
20 words
The coating composition of Claim 1 wherein the polyvinylidene chloride homopolymer and/or copolymer component (a) is provided as a latex.
Claim 5
Dependent Claim
27 words
The coating composition of Claim 1 wherein the polyvinylidene chloride homopolymer and/or copolymer component (a) is present at a level of from 50 to 90 percent thereof.
Claim 6
Dependent Claim
29 words
The coating composition of Claim 1 wherein the polyvinylidene chloride homopolymer and/or copolymer component (a) is present at a level of from 70 to 80 percent by weight thereof.
Claim 7
Dependent Claim
30 words
The coating composition of Claim 1 wherein wax component (b) is selected from the group consisting of vegetable wax, animal wax, mineral wax, artificial wax, synthetic wax and manufactured wax.
Claim 8
Dependent Claim
13 words
The coating composition of Claim 1 wherein wax component (b) is carnauba wax.
Claim 9
Dependent Claim
24 words
The coating composition of Claim 1 wherein wax component (b) is present at a level of from 1.5 to 10 percent by weight thereof.
Claim 10
Dependent Claim
30 words
The coating composition of Claim 1 wherein pigment component (c) is an inorganic material selected from titanium dioxide, calcium carbonate, clays, zinc oxide, antimony oxide, carbon black and iron oxides.
Claim 11
Dependent Claim
33 words
The coating composition of Claim 1 wherein pigment component (c) is an organic material selected from toluidine red, para red, triphenylmethane pigment, xanthene pigment, thiazole pigment, quinoline pigment, anthraquinone pigment and phythalocyanine pigment.
Claim 12
Dependent Claim
23 words
The coating composition of Claim 1 wherein pigment component (c) is present at a level of from 8 to 40 weight percent thereof.
Claim 13
Dependent Claim
23 words
The coating composition of Claim 1 wherein pigment component (c) is persent at a level of from 15 to 25 weight percent thereof.
Claim 14
Dependent Claim
30 words
A mono-layer or multi-layer oriented polyolefin film having at least one exposed surface thereof coated with a primer, the primer-coated surface being coated with a coating composition of Claim 1.
Claim 15
Dependent Claim
10 words
The oriented film of Claim 13 formed from isotactic polypropylene.
Claim 16
Dependent Claim
137 words
An oriented, opaque multi-layer film structure having at least one exposed surface thereof coated with a primer, the primer-coated surface being coated with a coating composition of Claim 1, the film structure comprising: (a) a thermoplastic polymer matrix core layer having an upper and lower surface and within which is located a strata of voids; positioned at least substantially within at least a substantial number of voids is at least one void-initiating particle which is phase distinct and incompatible with the matrix material, the void space occupied by the particle being substantially less than the volume of the void, with one generally cross-sectional dimension of the particle at least approximating a corresponding cross-sectional dimension of the void; and, (b) a void-free thermoplastic skin layer affixed to each of the upper and lower surfaces of core layer (a).
Claim 17
Dependent Claim
20 words
The film structure of Claim 15 wherein core layer (a) and skin layers (b) are both formed from isotactic polypropylene.
References Cited (Backward Citations)
No citation records indexed.
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