US4923756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primerless adhesive for fiberglass reinforced polyester substrates
Assignee: Ashland LLC
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Filing: 1987-08-20
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Granted: 1990-05-08
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Expires: 2007-08-20
Abstract
Abstract A laminated fiberglass reinforced polyester (FRP) substrate made using a primerless adhesive and the process of making the laminated FRP substrate. The primerless adhesive combines a prepolymer, an aliphatic polyisocyanate and a curative.
Inventors
- 👤 Daniel A. Chung
- 👤 Laurence G. Dammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:17
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/36; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/70; C08G18/72; C08G18/721; C08G18/724; C08G18/73; C08G18/74; C08G18/75; C08G18/76; C08G18/7614; C08G18/7628; C08G18/81; C08G18/8108; C09; C09J; C09J175/00; C09J175/04; C09J175/12; B32B2305/00; B32B2305/08; B32B2367/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31786
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A laminated composite comprising a first unprimed fiber reinforced polyester substrate having a second substrate adhesively bound thereto by the cured residue of an adhesive comprising a blend of a prepolymer component comprising the reaction product of a polyol and an aromatic isocyanate and having 3 to 15 percent free isocyanate groups; an aliphatic polyisocyanate and a curative component comprising a polyfunctional polyether polyol.
Claim 2
Dependent Claim
64 words
A laminated composite comprising a first unprimed fiber reinforced polyester substrate having a second substrate adhesively bound thereto by the cured residue of an adhesive comprising a blend of a prepolymer component comprising the reaction product of a polyol and an aromatic isocyanate and having 3 to 15 percent free isocyanate groups; an aliphatic polyisocyanate and a curative component comprising a polyfunctional polyether polyol.
Claim 3
Dependent Claim
54 words
The laminated composite of claim 1 wherein said aliphatic polyisocyanate has an aliphatic carbon alpha to said isocyanate group wherein said alpha carbons are --CH 2 R, --CHRR' or --CRR'R", where R, R' and R" are independently substituted or unsubstituted aromatic groups or substituted or unsubstituted aliphatic groups of six to forty carbon atoms.
Claim 4
Dependent Claim
18 words
The laminated substrate of claim 2 wherein said aliphatic isocyanate has a molecular weight from 120 to 700.
Claim 5
Dependent Claim
42 words
The laminated substrate of claim 3 wherein said aliphatic isocyanate is selected from the group consisting of isophorone diisocyanate, bis-(4-isocyanatocyclohexyl) methane, m-xylylenediisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane, m-tetramethylxylene diisocyanate, dimethyl-p-isopropenyl benzyl isocyanate, trimethyl hexamethylene diisocyanate, 2-isocyanatoethyl 2, 6 diisocyanatohexanoate, hexamethylene diisocyanate and mixtures thereof.
Claim 6
Dependent Claim
28 words
The laminated substrate of claim 4 wherein said primerless adhesive comprises about 100 weight parts combined prepolymer and curative and from 0.5 to 6.0 weight parts aliphatic isocyanate.
Claim 7
Dependent Claim
34 words
The laminated substrate of claim 5 wherein said primerless adhesive comprises from 50 to 85 weight parts prepolymer, from 0.5 to 6.0 weight parts aliphatic isocyanate, and the balance curative to make 100 parts.
Claim 8
Dependent Claim
26 words
The laminated substrate of claim 6 wherein said primerless adhesive comprises about 80 parts prepolymer, about 20 parts curative and from 0.5 to 4.0 parts m-xylylenediisocyanate.
Claim 9
Dependent Claim
10 words
The substrate of claim 7 further comprising a urethane catalyst.
References Cited (Backward Citations)
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US3935051A
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US4004050A
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US4552934A
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |