US4816503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer concrete having high bond strength and long working time
Assignee: Dow Chemical Co
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Filing: 1987-04-08
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Granted: 1989-03-28
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Expires: 2007-04-08
Abstract
Abstract Polymer concretes having a high bond strength and/or long working times are made from a curable composition of norbornyl modified unsaturated polyester or polyesteramide resins blended with a polymerizable monomer such as styrene, an aggregate mixture such as sand and gravel and an effective amount of styrene acrylonitrile copolymers, styrene alphamethylstyrene copolymers, or a styrene acrylonitrile copolymer mixture with no more than 25% by weight polystyrene.
Inventors
- 👤 William C. Cunningham
- 👤 Randy A. Ramsey
- 👤 Randal E. Autenrieth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:59
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/18; C04B26/20; C08L77/00; C08L77/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
In a curable polymer concrete composition with a high bond strength and a long working time comprising (a) norbornyl modified unsaturated polyester or polyesteramide resin blend with a polymerizable monomer and (b) an aggregate mixture, the improvement which comprises the inclusion of (c) an amount of a styrene copolymer additive effective to give a measurable increase in bond strength, a longer working time or both selected from the group consisting of (1) styrene acrylonitrile copolymers (2) styrene alphamethylstyrene copolymers, and (3) styrene acrylonitrile copolymer mixtures with no more than 25% by weight polystyrene.
Claim 2
Dependent Claim
93 words
In a curable polymer concrete composition with a high bond strength and a long working time comprising (a) norbornyl modified unsaturated polyester or polyesteramide resin blend with a polymerizable monomer and (b) an aggregate mixture, the improvement which comprises the inclusion of (c) an amount of a styrene copolymer additive effective to give a measurable increase in bond strength, a longer working time or both selected from the group consisting of (1) styrene acrylonitrile copolymers (2) styrene alphamethylstyrene copolymers, and (3) styrene acrylonitrile copolymer mixtures with no more than 25% by weight polystyrene.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the said copolymer additive has a molecular weight from 5000 to 1,000,000.
Claim 4
Dependent Claim
21 words
The composition of claim 1 wherein said aggregate mixture comprises, sand, gravel, crushed rock, silica flour, fly ash, or mixtures thereof.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said polymerizable monomer is styrene.
Claim 6
Dependent Claim
27 words
The composition of claim 1 wherein said styrene copolymer additive is used in the range from 1.0 to 11 percent by weight based on the total weight.
Claim 7
Dependent Claim
95 words
A curable polymer concrete composition with a high bond strength and a long working time comprising (a) from 6 to 25% by weight of a blend of a norbornyl modified unsaturated polyester or polyesteramide resin containing 1 to 80% by weight of a polymerizable monomer, (b) from 93 to 64% by weight by an aggregate mixture, and (c) from 1.0 to 115 weight of a styrene copolymer additive consisting of (1) styrene acrylonitrile copolymers, (2) styrene alphamethyl styrene copolymers, or (3) styrene acrylonitrile copolymer mixture with no more than than 25% by weight of polystyrene.
Claim 8
Dependent Claim
95 words
A curable polymer concrete composition with a high bond strength and a long working time comprising (a) from 6 to 25% by weight of a blend of a norbornyl modified unsaturated polyester or polyesteramide resin containing 1 to 80% by weight of a polymerizable monomer, (b) from 93 to 64% by weight by an aggregate mixture, and (c) from 1.0 to 115 weight of a styrene copolymer additive consisting of (1) styrene acrylonitrile copolymers, (2) styrene alphamethyl styrene copolymers, or (3) styrene acrylonitrile copolymer mixture with no more than than 25% by weight of polystyrene.
Claim 9
Dependent Claim
21 words
The composition of claim 6 wherein said aggregate mixture comprises sand, gravel, crushed rock, silica flour, fly ash, or mixtures thereof.
Claim 10
Dependent Claim
11 words
The composition of claim 6 wherein said polymerizable monomer is styrene.
Claim 11
Dependent Claim
20 words
The cured compositions as set forth in any one of claims 1, 2, 3, 4, 5, 6, 7 or 8.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |