US4042732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cohesive coating compositions
Assignee: British Cellophane Ltd
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Filing: 1975-09-25
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Granted: 1977-08-16
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Expires: 1995-09-25
Abstract
Abstract A cohesive coating composition comprises in dispersion in a liquid a mixture of between 51 and 99% by weight of a natural or synthetic rubber and between 1 and 49% by weight of polyalkyl methacrylate in which dispersion there is incorporated between 5% and 35% by weight, based on the weight of the solids, of a inert particulate material having a mean particle size lying in the range between 0.2 and 50 microns. The compositions are applied to sheet materials used, for example, in packaging.
Inventors
- 👤 Andrew Nicholas Ferrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:00
CPC Classifications
C; C08; C08L; C08L21/00; C08L21/02; C08K; C08K3/00; C08K3/34; C08K7/00; C08K7/16; C08K7/18; C08K7/20; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L33/00; C08L33/04; C08L33/06; C08L33/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A cohesive coating composition comprising in dispersion in a liquid a mixture of between 70 and 90% by weight of natural rubber and between 10 and 30% by weight of poly-n-butyl methacrylate in which dispersion there is incorporated between 10% and 35% by weight, based on the weight of the solids, of an inert particulate mineral material selected from the group consisting of glass and hydrated aluminum silicate having a mean particle size lying in the range between 2.0 and 20 microns.
Claim 2
Dependent Claim
82 words
A cohesive coating composition comprising in dispersion in a liquid a mixture of between 70 and 90% by weight of natural rubber and between 10 and 30% by weight of poly-n-butyl methacrylate in which dispersion there is incorporated between 10% and 35% by weight, based on the weight of the solids, of an inert particulate mineral material selected from the group consisting of glass and hydrated aluminum silicate having a mean particle size lying in the range between 2.0 and 20 microns.
Claim 3
Dependent Claim
17 words
A cohesive coating composition according to claim 1, in which a stabilizer is added to the dispersion.
Claim 4
Dependent Claim
26 words
A cohesive coating composition according to claim 1, in which the inert particulate mineral material is present in the range between 10% and 25% by weight.
Claim 5
Independent Claim
106 words
A method for the production of a cohesive coated sheet wrapping material comprising coating a sheet wrapping material with a cohesive coating composition comprising in dispersion in a liquid a mixture of between 70 and 90% by weight of natural rubber and between 10 and 30% by weight of poly-n-butyl methacrylate in which dispersion there is incorporated between 10% and 35% by weight, based on the weight of the solids, of an inert particulate mineral material selected from the group consisting of glass and hydrated aluminum silicate having a mean particle size lying in the range between 2.0 and 20 microns followed by drying the composition.
Claim 6
Independent Claim
106 words
A method for the production of a cohesive coated sheet wrapping material comprising coating a sheet wrapping material with a cohesive coating composition comprising in dispersion in a liquid a mixture of between 70 and 90% by weight of natural rubber and between 10 and 30% by weight of poly-n-butyl methacrylate in which dispersion there is incorporated between 10% and 35% by weight, based on the weight of the solids, of an inert particulate mineral material selected from the group consisting of glass and hydrated aluminum silicate having a mean particle size lying in the range between 2.0 and 20 microns followed by drying the composition.
Claim 7
Independent Claim
97 words
A method for the production of a cohesive coated sheet wrapping material comprising coating a sheet wrapping material with a cohesive coating composition comprising in a dispersion in a liquid a mixture of between 70 and 90% by weight of carboxylated styrene butadiene rubber and between 10 and 30% by weight of poly-n-butyl methacrylate in which dispersion there is incorporated between 10% and 25% by weight, based on the weight of the solids, of particulate hydrated aluminum silicate having a mean particle size lying in the range between 2.0 and 20 microns followed by drying the composition.
Claim 8
Independent Claim
97 words
A method for the production of a cohesive coated sheet wrapping material comprising coating a sheet wrapping material with a cohesive coating composition comprising in a dispersion in a liquid a mixture of between 70 and 90% by weight of carboxylated styrene butadiene rubber and between 10 and 30% by weight of poly-n-butyl methacrylate in which dispersion there is incorporated between 10% and 25% by weight, based on the weight of the solids, of particulate hydrated aluminum silicate having a mean particle size lying in the range between 2.0 and 20 microns followed by drying the composition.
References Cited (Backward Citations)
US2785143A
Cited
US2880185A
Cited
US3132041A
Cited
US3432339A
Cited
GB1019632A
Cited
US3380938A
Cited
US3714107A
Cited
US3937683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |