US4100114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam composition
Assignee: Hitachi Ltd
•
Filing: 1975-12-30
•
Granted: 1978-07-11
•
Expires: 1995-12-30
Abstract
Abstract A rigid polyurethane foam composition characterized by containing 5 to 20% by weight of hollow-spherical Silas balloons having a particle size of 100 to 300 mu (based on the total weight of the polyol and isocyanate components of the polyurethane foam) and 0.2 to 2% by weight of an organosilane compound (based on the total weight of the polyol and isocyanate components of the polyurethane foam and said Silas balloons) in the rigid polyurethane foam.
Inventors
- 👤 Reishi Naka
- 👤 Toshikazu Narahara
- 👤 Junji Mukai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:40
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/35; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A rigid polyurethane foam-containing composition which also contains 5 to 20% by weight of hollow-spherical amorphous natural vitreous Silas balloons having a particle size of 100 to 300μ, based on the total weight of polyol and isocyanate components of the polyurethane foam, and 0.2 to 2% by weight of an organosilane compound, based on the total weight of the polyol and isocyanate components of the polyurethane foam and said Silas balloons in the rigid polyurethane foam, said foam composition having a density of about 0.05 gram per cubic centimeter or less.
Claim 2
Dependent Claim
91 words
A rigid polyurethane foam-containing composition which also contains 5 to 20% by weight of hollow-spherical amorphous natural vitreous Silas balloons having a particle size of 100 to 300μ, based on the total weight of polyol and isocyanate components of the polyurethane foam, and 0.2 to 2% by weight of an organosilane compound, based on the total weight of the polyol and isocyanate components of the polyurethane foam and said Silas balloons in the rigid polyurethane foam, said foam composition having a density of about 0.05 gram per cubic centimeter or less.
Claim 3
Dependent Claim
39 words
A rigid polyurethane foam-containing composition according to claim 1 wherein the surfaces of the hollow-spherical Silas balloons have been treated with 1 to 5% by weight of the organosilane compound based on the weight of the hollow-spherical Silas balloons.
Claim 4
Dependent Claim
18 words
A rigid polyurethane foam containing composition according to claim 1 wherein the organosilane compound is an aminosilane compound.
Claim 5
Dependent Claim
18 words
A rigid polyurethane foam containing composition according to claim 2 wherein the organosilane compound is an aminosilane compound.
Claim 6
Dependent Claim
23 words
A rigid polyurethane foam containing composition according to claim 1 wherein the hollow-spherical Silas balloons have a particle size of 200 to 250μ.
Claim 7
Dependent Claim
23 words
A rigid polyurethane foam containing composition according to claim 2 wherein the hollow-spherical Silas balloons have a particle size of 200 to 250μ.
Claim 8
Dependent Claim
23 words
A rigid polyurethane foam-containing composition according to claim 1, wherein the Silas balloons have a specific gravity of from about 0.1 to 0.5.
References Cited (Backward Citations)
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US3238156A
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US3290165A
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US3524794A
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US3585157A
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US3627706A
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US3959197A
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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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |