US4737524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing asphalt-blended polyurethane foams
Assignee: Bridgestone Corp
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Filing: 1986-12-23
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Granted: 1988-04-12
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Expires: 2006-12-23
Abstract
Abstract A process for producing asphalt-blended polyurethane foams which comprises introducing starting foaming materials for polyurethane foams containing a polyoxyalkylene polyol and an organic isocyanate either as respective individual ingredients or as a prepolymer into an agitation mixing chamber of a foaming apparatus, while introducing a previously heated and melted asphalt into the agitation mixing chamber of the foaming apparatus, mixing the starting foaming material for the polyurethane foams and the heated and melted asphalt and then foaming them. Asphalt-blended polyurethane foams can be obtained simply and efficiently and they are excellent in general physical properties, sound/vibration characteristics and are suitable as sealing materials and sound-proofing or vibration-damping materials.
Inventors
- 👤 Masayuki Ako
- 👤 Masafumi Dobashi
- 👤 Hiroya Fukuda
- 👤 Takashi Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:32
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04; C08J2495/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
A process for the production of an asphalt-blended flexible polyurethane foam which comprises: adding into an agitation mixing chamber of a foaming apparatus starting foaming materials consisting essentially of a polyoxyalkylene polyol which is not compatible with but separated from an asphalt, an organic isocyanate wherein said polyoxyalkylene polyol and said organic isocyanate are individual ingredients or in the form of a prepolymer, water, a catalyst, and a foam conditioning agent; introducing into said agitation mixing chamber melted asphalt; simultaneously mixing said starting forming materials with said melted asphalts; and foaming the resultant mixture.
Claim 2
Dependent Claim
94 words
A process for the production of an asphalt-blended flexible polyurethane foam which comprises: adding into an agitation mixing chamber of a foaming apparatus starting foaming materials consisting essentially of a polyoxyalkylene polyol which is not compatible with but separated from an asphalt, an organic isocyanate wherein said polyoxyalkylene polyol and said organic isocyanate are individual ingredients or in the form of a prepolymer, water, a catalyst, and a foam conditioning agent; introducing into said agitation mixing chamber melted asphalt; simultaneously mixing said starting forming materials with said melted asphalts; and foaming the resultant mixture.
Claim 3
Dependent Claim
33 words
The production process as defined in claim 1, wherein the asphalt is blended in an amount from 5 to 200 parts by weight based on 100 parts by weight of the polyoxyalkylene polyol.
Claim 4
Dependent Claim
33 words
The production process as defined in claim 2, wherein the asphalt is blended in an amount from 80 to 120 parts by weight based on 100 parts by weight of the polyoxyalkylene polyol.
Claim 5
Dependent Claim
25 words
The production process as defined in claim 1, wherein the asphalt used in the process is selected from straight asphalt, blown asphalt and cutback asphalt.
Claim 6
Dependent Claim
18 words
The production process as defined in claim 1, wherein the asphalt has the penetration degree greater than 60.
Claim 7
Dependent Claim
25 words
The production process as defined in claim 1, wherein the asphalt is supplied in a molten state at a temperature from 100° to 120° C.
Claim 8
Dependent Claim
30 words
A process according to claim 1, wherein said polyoxyalkylene polyol is selected from the group consisting of addition polymerizates of alkylene oxide, alone, or in combination with a polyhydric alcohol.
Claim 9
Dependent Claim
24 words
A process according to claim 7, wherein said polyoxyalkylene polyol is an addition polymerizate of ethylene oxide, propylene oxide, butylene oxide or mixtures thereof.
Claim 10
Dependent Claim
22 words
A process according to claim 7, wherein said polyoxyalkylene polyol is an addition polymerizate of an alkylene oxide and a polyhydric alcohol.
Claim 11
Dependent Claim
26 words
A process according to claim 9, wherein said polyhydric alcohol is selected from a group consisting of ethylene glycol, propylene glycol, glycerin, trimethylol propane and pentaerythritol.
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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |