US4087400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet vinyl flooring seam sealing composition
Assignee: Tarkett AB
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Filing: 1975-07-28
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Granted: 1978-05-02
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Expires: 1995-07-28
Abstract
Abstract Sections of sheet vinyl flooring having polyurethane wear layers are joined together with a sealing composition comprising between about 10 and about 75 wt. % uncured polyurethane, between about 20 and about 85 wt. % tetrahydrofuran and between about 5 and about 60 wt. % of an organic solvent for the polyurethane. The uncured polyurethane is preferably in the form of polyurethane prepolymer of the moisture/cure type and the organic solvent for the polyurethane preferably has an evaporation rate not more than 95 percent of the evaporation rate of the tetrahydrofuran.
Inventors
- 👤 David B. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A sheet vinyl flooring seam sealing composition for joining sections of sheet vinyl flooring having high gloss polyurethane wear layers which comprises: a. between about 10 and about 75 wt% uncured polyurethane. b. between about 20 and about 85 wt% tetrahydrofuran; and c. between about 5 and about 60 wt% of an organic solvent for the uncured polyurethane, said solvent having an evaporation rate less than about 95% of the evaporation rate of the tetrahydrofuran in the composition and being selected from the group consisting of toluene, xylene, methyl ethyl ketone, isopropanol and methyl isobutyl ketone.
Claim 2
Dependent Claim
96 words
A sheet vinyl flooring seam sealing composition for joining sections of sheet vinyl flooring having high gloss polyurethane wear layers which comprises: a. between about 10 and about 75 wt% uncured polyurethane. b. between about 20 and about 85 wt% tetrahydrofuran; and c. between about 5 and about 60 wt% of an organic solvent for the uncured polyurethane, said solvent having an evaporation rate less than about 95% of the evaporation rate of the tetrahydrofuran in the composition and being selected from the group consisting of toluene, xylene, methyl ethyl ketone, isopropanol and methyl isobutyl ketone.
Claim 3
Dependent Claim
13 words
The composition of claim 1 in which the uncured polyurethane is polyurethane prepolymer.
Claim 4
Dependent Claim
14 words
The composition of claim 2 in which the prepolymers are of the moisture/cure type.
Claim 5
Dependent Claim
17 words
The composition of claim 3 in which the polyurethane prepolymer is of the aliphatic or cycloaliphatic type.
Claim 6
Dependent Claim
11 words
The composition of claim 4 in which the solvent is toluene.
Claim 7
Dependent Claim
25 words
The composition of claim 2 in which the organic solvent has an evaporation rate less than about 50% of the evaporation rate of the THF.
Claim 8
Dependent Claim
20 words
The composition of claim 2 in which the viscosity of the composition is between about 20 and about 300 cps.
Claim 9
Dependent Claim
28 words
The composition of claim 5 in which the polyurethane prepolymer is based on 4,4'-methylene dicyclohexane diisocyanate and trimethylol propane plus polypropylene glycol ether and adipic acid/ethylene glycol ester.
Claim 10
Dependent Claim
51 words
The composition of claim 1 comprising between about 20 and about 60 wt. % polyurethaneprepolymer based on 4,4'-methylene dicyclohexane diisocyanate and trimethylol propane plus polypropylene glycol ether and adipic acid/ethylene glycol ester, between about 30 and about 70 wt. % tetrahydrofuran and between about 10 and about 20 wt. % toluene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |