US3933724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing compounds
Assignee: Ball Corp
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Filing: 1974-12-04
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Granted: 1976-01-20
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Expires: 1994-12-04
Abstract
Abstract This invention relates to compositions and methods of making compositions useful as sealants in food containers comprising a mixture of SBR polymer, resin, filler, and a solvent, which compositions without the solvent can be stabily stored and shipped in dry form. Also, charcoal can be admixed in situ to protect against taste and odor transfer to foods.
Inventors
- 👤 Ronald G. Mixell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:47
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08K; C08K3/00; C08K3/34; C08L45/00; C08L97/00; C08L97/002; C08K3/346; C08K5/00; C08K5/01; C08L45/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
150 words
A can end sealant composition for food containers which imparts substantially no odor or taste to food packaged in said container consisting essentially of from 80 to 100 parts by weight of styrenebutadiene rubber with from about 20% to 25% bound styrene; from about 50 to 80 parts by weight of a resin selected from the group consisting of a coumarone-indene type resin and a polycyclopentadiene, said resin having a melting point from about 100°C. to 145°C, the total amount of said styrene-butadiene rubber and said resin being not more than 160 parts by weight of said composition; from about 45-75 parts by weight of a filler having an average particle size of about 10 microns and being selected from the group consisting of silica and clay; and about 2 to 5 parts by weight of charcoal to protect against taste and odor transfer to food packaged in said container.
Claim 2
Dependent Claim
150 words
A can end sealant composition for food containers which imparts substantially no odor or taste to food packaged in said container consisting essentially of from 80 to 100 parts by weight of styrenebutadiene rubber with from about 20% to 25% bound styrene; from about 50 to 80 parts by weight of a resin selected from the group consisting of a coumarone-indene type resin and a polycyclopentadiene, said resin having a melting point from about 100°C. to 145°C, the total amount of said styrene-butadiene rubber and said resin being not more than 160 parts by weight of said composition; from about 45-75 parts by weight of a filler having an average particle size of about 10 microns and being selected from the group consisting of silica and clay; and about 2 to 5 parts by weight of charcoal to protect against taste and odor transfer to food packaged in said container.
Claim 3
Dependent Claim
30 words
The can end sealant composition of claim 1 which also includes about 400 to 450 parts by weight of a solvent selected from the group consisting of hexane and cyclohexane.
Claim 4
Dependent Claim
25 words
The can end sealant composition of claim 1 which also includes about 1 to 3 parts by weight of a stereometrically hindered phenol type antioxidant.
Claim 5
Dependent Claim
34 words
The can end sealant composition of claim 1 which also includes from about 1 to 5 parts by weight of titanium dioxide and a maximum of about 5 parts by weight of zinc oxide.
Claim 6
Dependent Claim
22 words
The can end sealant composition of claim 1 wherein said resin is coumarone-indene type resin having a melting point of about 115°C.
Claim 7
Dependent Claim
23 words
The can end sealant composition of claim 1 wherein said resin is 1,3-polycyclopentadiene having a melting point of from about 120°C to 135°C.
Claim 8
Dependent Claim
15 words
The can end sealant composition of claim 3 wherein said antioxidant is 1,3,5-trimethyl-2,4,6-tris-[3,5-ditertbutyl-4-hydroxy benzyl] benzene.
Claim 9
Dependent Claim
162 words
A can end for a food container, said can end having dispersed thereon a can end sealant composition which imparts substantially no odor or taste to food packaged in said container, said sealant composition consisting essentially of from 80 to 100 parts by weight of styrene-butadiene rubber with from about 20% to 25% bound styrene; from about 50 to 80 parts by weight of a resin selected from the group consisting of a coumarone-indene type resin and polycyclopentadiene, said resin having a melting point from about 100°C. to 145°C., the total amount of said styrene-butadiene rubber and said resin being not more than 160 parts by weight of said composition; from about 45-75 parts by weight of a filler having an average particle size of about 10 microns and being selected from the group consisting of silica and clay; and about 2 to 5 parts by weight of charcoal to protect against taste and odor transfer to food packaged in said container.
Claim 10
Dependent Claim
162 words
A can end for a food container, said can end having dispersed thereon a can end sealant composition which imparts substantially no odor or taste to food packaged in said container, said sealant composition consisting essentially of from 80 to 100 parts by weight of styrene-butadiene rubber with from about 20% to 25% bound styrene; from about 50 to 80 parts by weight of a resin selected from the group consisting of a coumarone-indene type resin and polycyclopentadiene, said resin having a melting point from about 100°C. to 145°C., the total amount of said styrene-butadiene rubber and said resin being not more than 160 parts by weight of said composition; from about 45-75 parts by weight of a filler having an average particle size of about 10 microns and being selected from the group consisting of silica and clay; and about 2 to 5 parts by weight of charcoal to protect against taste and odor transfer to food packaged in said container.
Claim 11
Dependent Claim
31 words
The can end of claim 8 wherein said sealant composition also includes about 400 to 450 parts by weight of a solvent selected from the groups consisting of hexane and cyclohexane.
Claim 12
Dependent Claim
26 words
The can end of claim 8 wherein said sealant composition also includes about 1 to 3 parts by weight of a stereometrically hindered phenol type antioxidant.
Claim 13
Dependent Claim
35 words
The can end of claim 8 wherein said sealant composition also includes from about 1 to 5 parts by weight of titanium dioxide and a maximum of about 5 parts by weight of zinc oxide.
Claim 14
Dependent Claim
24 words
The can end of claim 8 wherein said resin in said sealant composition is coumarone-indene type resin having a melting point of about 115°C.
Claim 15
Dependent Claim
25 words
The can end of claim 8 wherein said resin in said sealant composition is 1,3-polycyclopentadiene having a melting point of from about 120°C to 135°C.
Claim 16
Dependent Claim
17 words
The can end of claim 10 wherein said antioxidant in said sealant composition is 1,3,5-trimethyl-2,4,6-tris-[3,5ditertbutyl-4-hydroxy benzyl] benzene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |