US4430463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic polymer Portland cement coating composition
Assignee: DURUS INTERNATIONAL CORP
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Filing: 1982-09-15
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Granted: 1984-02-07
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Expires: 2002-09-15
Abstract
Abstract Improved Portland cement compositions and their use in cement coating operations is disclosed wherein acrylic polymers modified by critical amounts of propylene glycol, a coloring ingredient and a defoaming agent such as dimethyl polysiloxane are used as additives substantially increasing the flexibility, abrasion and heat resistance and shear bond characteristics of Portland cement and sand mixtures used in coating compositions for concrete, wood, pressed boards and the like.
Inventors
- 👤 Perry D. Mullenax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:02
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C04B2111/00; C04B2111/00474; C04B2111/00482; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
An improved coating composition comprising: (1) between about 5% and about 7% by weight of an aqueous dispersion of an acrylic polymer, (2) between about 23% to about 38% by weight of a type 1 Portland cement, (3) 50% by weight sand, (4) about 0.015% by weight of an aqueous solution of propylene glycol, (5) approximately 0.2% by weight of a defoaming agent, and (6) the balance to 100% by weight water, the % by weight based on the total weight of the composition.
Claim 2
Dependent Claim
84 words
An improved coating composition comprising: (1) between about 5% and about 7% by weight of an aqueous dispersion of an acrylic polymer, (2) between about 23% to about 38% by weight of a type 1 Portland cement, (3) 50% by weight sand, (4) about 0.015% by weight of an aqueous solution of propylene glycol, (5) approximately 0.2% by weight of a defoaming agent, and (6) the balance to 100% by weight water, the % by weight based on the total weight of the composition.
Claim 3
Dependent Claim
33 words
The improved coating composition set forth in claim 1 and wherein the acrylic polymer is one of a group of acrylic resins comprising a thermoplastic polymer of acrylic acid, methacrylic acid, or acrylonitrile.
Claim 4
Dependent Claim
33 words
The improved coating composition set forth in claims 1 or 2 wherein the propylene glycol is one of a group comprising 1,2 propylene glycol, 1.2 dihydroxypropane, 1.2 propanediol, methylene glycol or methyl glycol.
Claim 5
Dependent Claim
14 words
The improved coating composition set forth in claim 1 wherein said defoamer is dimethylpolysiloxane.
Claim 6
Dependent Claim
21 words
The improved coating composition set forth in claim 1 wherein the Portland cement is 50% by weight of the total composition.
Claim 7
Dependent Claim
21 words
The improved coating composition set forth in claim 1 wherein the acrylic polymer is 6% by weight of the total composition.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |