US4352858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane adhesive compositions modified with a dicarbamate ester useful in laminating substrates
Assignee: Ingredion Inc
•
Filing: 1981-09-04
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Granted: 1982-10-05
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Expires: 2001-09-04
Abstract
Abstract A modified polyurethane adhesive composition characterized by its improved bond strength and curing properties contains an isocyanate-terminated prepolymer and from 2.5 to 100% by weight, based on the prepolymer, of a dicarbamate ester compatible with the prepolymer and containing two free isocyanate groups. The resultant adhesive is suitable for hot-melt applications in bonding flexible substrates.
Inventors
- 👤 Henry Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:15
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8012; C08G18/8054; C08G18/8058; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
An improved modified polyurethane adhesive composition comprising an isocyanate-terminated prepolymer having a molecular weight of at least about 1000, and 2.5-100% by weight, based on said prepolymer, of a dicarbamate ester reaction product of two moles of an organic diisocyanate and one mole of a dihydroxy compound, of the general formula: ##STR2## wherein R is a divalent hydrocarbon radical and R 1 is a divalent aliphatic radical, and said dicarbamate esters is compatible with said prepolymer and has a molecular weight no greater than 800.
Claim 2
Dependent Claim
85 words
An improved modified polyurethane adhesive composition comprising an isocyanate-terminated prepolymer having a molecular weight of at least about 1000, and 2.5-100% by weight, based on said prepolymer, of a dicarbamate ester reaction product of two moles of an organic diisocyanate and one mole of a dihydroxy compound, of the general formula: ##STR2## wherein R is a divalent hydrocarbon radical and R 1 is a divalent aliphatic radical, and said dicarbamate esters is compatible with said prepolymer and has a molecular weight no greater than 800.
Claim 3
Dependent Claim
23 words
The adhesive composition of claim 1 wherein said dicarbamate ester is present in an amount of 10-40% by weight, based on said prepolymer.
Claim 4
Dependent Claim
28 words
The adhesive composition of claim 1 wherein said dicarbamate ester is prepared from a diisocyanate selected from the group consisting of methylene-bis-phenyl diisocyanate, isophorone diisocyanate and toluene diisocyanate.
Claim 5
Dependent Claim
41 words
The adhesive composition of claim 1 wherein said dicarbamate ester is prepared from a dihydroxy compound selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,4-butane diol, 1,6-hexane diol, and 1,4-cyclohexane dimethanol.
Claim 6
Dependent Claim
46 words
The adhesive composition of claim 1 wherein said prepolymer is prepared from a diisocyanate selected from the group consisting of methylene-bis-phenyl diisocyanate, isophorone diisocyanate and toluene diisocyanate, and from a polypropylene glycol of molecular weight of about 400-2000 or from mixtures of two or more glycols.
Claim 7
Dependent Claim
22 words
In a process for laminating substrates with an adhesive, the improvement which comprises applying as the adhesive the composition of claim 1.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the adhesive is applied as a hot-melt adhesive.
Claim 9
Dependent Claim
12 words
A laminated film assembly bonded by the adhesive composition of claim 1.
Claim 10
Dependent Claim
11 words
A laminated film assembly bonded by the process of claim 7.
References Cited (Backward Citations)
US2929800A
Cited
US3094495A
Cited
US3284539A
Cited
US3496045A
Cited
US3490987A
Cited
US3663513A
Cited
US3666835A
Cited
US3829533A
Cited
US3969301A
Cited
US3931077A
Cited
US3991025A
Cited
US4193832A
Cited
US4242488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |