US4206299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1979-02-12
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Granted: 1980-06-03
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Expires: 1999-02-12
Abstract
Abstract An adhesive composition for plastic-metal foil composite packaging materials which comprises (A) a polyester glycol having a molecular weight of 3,000 to 100,000, a polyester-polyurethane polyol having a molecular weight of 3,000 to 100,000 or a mixture thereof, (B) a silane coupling agent and (C) an organic polyisocyanate, the molar equivalent ratio (NCO/H) of isocyanate group (NCO) to active hydrogen (H) thereof being within the range of 1 to 10. The adhesive composition provides a satisfactory packaging material which does not have the problem of delamination between the metal foil and plastic film even on hot-water sterilization as it contains foods in sealed relation and which ensures long shelf lives and an improved tolerance for foodstuffs.
Inventors
- 👤 Kyuya Yamazaki
- 👤 Sachio Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4216; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; C08K; C08K5/00; C08K5/54; C08L; C08L75/00; C09; C09J; C09J175/00; C09J175/04; C09J175/06; C08L2666/00; C08L2666/28; C08L2666/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
An adhesive composition for plastic-metal foil composite packaging materials which comprises (A) a polyester glycol having a molecular weight of 3,000 to 100,000, a polyester-polyurethane polyol having a molecular weight of 3,000 to 100,000 or a mixture thereof, (B) a silane coupling agent and (C) an organic polyisocyanate, the molar equivalent ratio (NCO/H) of isocyanate group (NCO) to active hydrogen (H) thereof being within the range of 1 to 10.
Claim 2
Dependent Claim
70 words
An adhesive composition for plastic-metal foil composite packaging materials which comprises (A) a polyester glycol having a molecular weight of 3,000 to 100,000, a polyester-polyurethane polyol having a molecular weight of 3,000 to 100,000 or a mixture thereof, (B) a silane coupling agent and (C) an organic polyisocyanate, the molar equivalent ratio (NCO/H) of isocyanate group (NCO) to active hydrogen (H) thereof being within the range of 1 to 10.
Claim 3
Dependent Claim
25 words
An adhesive composition claimed in claim 1, the molar equivalent ratio of isocyanate group to active hydrogen is within the range of 1.7 to 7.
Claim 4
Dependent Claim
30 words
An adhesive composition claimed in claim 1, the relative amount of the silane coupling agent (B), based on component (A), is within the range of 0.05 to 30 weight percent.
Claim 5
Dependent Claim
30 words
An adhesive composition claimed in claim 1, the relative amount of the silane coupling agent (B), based on component (A), is within the range of 0.1 to 10 weight percent.
Claim 6
Dependent Claim
53 words
An adhesive composition claimed in claim 1, the silane coupling agent (B) is a compound having the structural formula: R-S i .tbd.(X) 3 or R-Si.tbd.(R')(X) 2 (wherein R is an organic group having a vinyl, epoxy, amino, imino or mercapto group; R' is a lower alkyl group; X is methoxy, ethoxy or chlorine).
Claim 7
Dependent Claim
32 words
An adhesive composition claimed in claim 5, wherein the compound has the structural formula: R-S i .tbd.(X) 3 (wherein R is an organic group having an imino group and X is methoxy).
Claim 8
Dependent Claim
32 words
An adhesive composition claimed in claim 5, wherein the compound has the structural formula: R-S i .tbd.(X) 3 (wherein R is an organic group having an epoxy group and X is methoxy).
References Cited (Backward Citations)
US3044979A
Cited
US3448072A
Cited
US3658939A
Cited
US3740254A
Cited
US4009312A
Cited
US4138527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |