Patent US4097442A successfully refreshed from Google Patents.
US4097442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandable polyurethane adhesive composition and laminates made therewith
Assignee: Goodyear Tire and Rubber Co
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Filing: 1977-09-21
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Granted: 1978-06-27
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Expires: 1997-09-21
Abstract
Abstract A polyurethane adhesive that is sandable when cured, the adhesive being the reaction product of a mixture of about one mol of a polyester polyol or polyether polyol of 2-4 hydroxyls having a molecular weight of 500 to about 3000 and 2.5 to 7 mols of isocyanate composition of a mixture of toluene diisocyanate and methane di(phenyl isocyanate) containing a filler composed of silica platelets and glass spherical platelets, a plasticizer amount of polyvinyl chloride plasticizer and a curative amount of monomeric nitrogen containing tetraol of 200 to 1000 molecular weight.
Inventors
- 👤 Alvin J. Kieft
- 👤 Richard L. Cline
- 👤 Thomas G. Rabito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7607; C08K; C08K3/00; C08K3/01; C08K3/013; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L75/00; C08L75/04; C09; C09J; C09J175/00; C09J175/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A polyurethane adhesive that is sandable when cured, comprising a reaction mixture of (a) about one mol of a reactive hydrogen containing polymeric material of 500 to about 3000 molecular weight selected from the class of polyester polyols and polyether polyols of 2 to 4 hydroxyls; (b) about 2.5 to 7 mols of an isocyanate composition comprised of a mixture of toluene diisocyanate and methane di(phenylisocyanate); and (c) a filler composed of about 50 to 200 parts by weight of silica platelets and about 50 to 200 parts of glass spherical particles, a plasticizer amount of a polyvinyl chloride plasticizer, a polyurethane catalyst and sufficient monomeric nitrogen containing tetraol of 200 to 1000 molecular weight to provide 0.5 to 1.0 mol of curative for each mol of excess isocyanate.
Claim 2
Dependent Claim
129 words
A polyurethane adhesive that is sandable when cured, comprising a reaction mixture of (a) about one mol of a reactive hydrogen containing polymeric material of 500 to about 3000 molecular weight selected from the class of polyester polyols and polyether polyols of 2 to 4 hydroxyls; (b) about 2.5 to 7 mols of an isocyanate composition comprised of a mixture of toluene diisocyanate and methane di(phenylisocyanate); and (c) a filler composed of about 50 to 200 parts by weight of silica platelets and about 50 to 200 parts of glass spherical particles, a plasticizer amount of a polyvinyl chloride plasticizer, a polyurethane catalyst and sufficient monomeric nitrogen containing tetraol of 200 to 1000 molecular weight to provide 0.5 to 1.0 mol of curative for each mol of excess isocyanate.
Claim 3
Dependent Claim
14 words
The adhesive of claim 1 wherein the polyether polyol is a polypropylene ether glycol.
Claim 4
Dependent Claim
19 words
The adhesive of claim 1 wherein the methane di(phenylisocyanate) constitutes 20 to 35 mols percent of the isocyanate composition.
Claim 5
Dependent Claim
24 words
The adhesive of claim 1 wherein a major portion of the MDI content of the isocyanate composition is from a quasi prepolymer of MDI.
References Cited (Backward Citations)
US3607825A
Cited
US3824201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |