US4524156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt foam
Assignee: WR Grace and Co Conn
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Filing: 1984-09-04
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Granted: 1985-06-18
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Expires: 2004-09-04
Abstract
Abstract The present invention is directed to a foamed product having a substantially closed cellular configuration. The foamed product is formed from a blend of asphalt with a polyvalent metal salt of anionic group containing polymers. The resultant foam product exhibits low bulk densities and pore volumes of about 85 percent or greater.
Inventors
- 👤 Joseph A. Cogliano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2395/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A porous structure comprising a foam of closed cellular configuration formed from a substantially homogeneous blend of from about 80 to 120 parts by weight asphalt and from about 5 to 25 parts by weight of a polyvalent metal salt of anionic group containing polymers selected from polyvalent metal salt neutralized sulfonated polymers or neutralized carboxylated polymers; said foam having a bulk density of less than about 9 pounds per cubic foot and a pore volume of at least about 85 percent.
Claim 2
Dependent Claim
82 words
A porous structure comprising a foam of closed cellular configuration formed from a substantially homogeneous blend of from about 80 to 120 parts by weight asphalt and from about 5 to 25 parts by weight of a polyvalent metal salt of anionic group containing polymers selected from polyvalent metal salt neutralized sulfonated polymers or neutralized carboxylated polymers; said foam having a bulk density of less than about 9 pounds per cubic foot and a pore volume of at least about 85 percent.
Claim 3
Dependent Claim
23 words
The porous structure of claim 1 wherein the homogeneous blend further contains from about 10 to 100 parts of a thermoplastic polymeric hydrocarbon.
Claim 4
Dependent Claim
40 words
The porous structure of claim 1 wherein the asphalt has a penetration value of from 0 to 50 and a softening point (Ring and Ball) of at least 50° C; and the anionic group containing polymer is a sulfonated EPDM.
Claim 5
Dependent Claim
33 words
The porous structure of claim 3 wherein the homogeneous blend further contains from about 10 to 100 parts of a thermoplastic hydrocarbon selected from the group consisting of polypropylene, polyethylene and styrene/acrylonitrile copolymers.
Claim 6
Dependent Claim
71 words
The porous structure of claim 1 wherein the asphalt has a penetration value of from 0 to about 50 and a softening point (Ring and Ball) of at least 50° C; and the anionic group containing polymer is a copolymer of ethylene with acrylic acid or C 1 -C 3 alkyl substituted acrylic acid or a copolymer of propylene with acrylic acid or C 1 -C 3 alkyl substituted acrylic acid.
Claim 7
Dependent Claim
33 words
The porous structure of claim 5 wherein the homogeneous blend further contains from about 10 to 100 parts of a thermoplastic hydrocarbon selected from the group consisting of polyproppylene, polyethylene and styrene/acrylonitrile copolymers.
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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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |