US3607486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making water repellent paper and gypsum sheathing board and coating composition useful therein
Assignee: National Gypsum Co
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Filing: 1969-05-01
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Granted: 1971-09-21
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Expires: 1989-05-01
Abstract
Abstract A method for making vapor permeable, water repellent paper having one surface treated with water repellent bituminous material and an opposite surface substantially free of water repellent material using a coating composition comprising an aqueous asphalt emulsion and an organic solvent with substantially all of said organic solvent being dispersed in the water phase of said emulsion. The process of making water repellent gypsum sheathing board using sheets of cover paper as described above.
Inventors
- 👤 Norbie C Jacks
- 👤 Jerry C Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:39
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; B; B28; B28B; B28B19/00; B28B19/0092
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
26 words
The method of claim 1 in which said organic solvent has a boiling point in the range of from about 335* F. to about 670* F.
Claim 2
Dependent Claim
15 words
The method of claim 1 in which said organic solvent is No. 2-D diesel fuel.
Claim 3
Dependent Claim
26 words
The method of claim 1 in which said aqueous emulsion of bituminous material contains from about 56 percent to about 64 percent by weight of asphalt.
Claim 4
Dependent Claim
49 words
The method of claim 1 in which said composition is formed by blending together No. 2-D diesel fuel and an aqueous asphalt emulsion containing from about 56 percent to about 64 percent by weight of asphalt in a volume ratio of diesel fuel to asphalt emulsion of about 2:7.
Claim 5
Dependent Claim
54 words
The method of claim 1 in which said composition contains from about 30 percent to about 45 percent by weight of bituminous material and is applied to said paper sheet at a paper temperature of from about 120* F. to about 180* F. in a weight ratio of composition to paper of about 1:20.
Claim 6
Dependent Claim
215 words
The process of making water repellent gypsum sheathing board comprising the steps of combining an organic solvent with an aqueous emulsion of bituminous material to form a composition with substantially all of said organic solvent being dispersed within the water phase of said emulsion, applying said composition while at about ambient temperature to only one surface of a relatively heavy paper sheet having a thickness of at least about 0.020'''' with less than complete through penetration of said paper sheet by said composition, said composition having sufficient proportion of bituminous material to produce water-repellency on said paper and a sufficient proportion of organic solvent to substantially reduce the amount of bituminous material which adheres to the application apparatus, drying said paper sheet whereby a water repellent surface is formed on one side without creating water repellency on the opposite surface ad without substantially lessening of the vapor permeability of the paper, subsequently depositing an aqueous slurry of calcined gypsum adjacent the uncoated surface of said paper, disposing an additional sheet of said paper over said calcined gypsum slurry with the uncoated surface of said additional paper sheet adjacent said slurry and then forming a gypsum board therefrom whereby said gypsum hardens and bonds to said uncoated paper surfaces to provide a strong water repellent board.
Claim 7
Dependent Claim
26 words
The process of claim 7 in which said organic solvent has a boiling point in the range of from about 335* F. to about 670* F.
Claim 8
Dependent Claim
15 words
The process of claim 7 in which said organic solvent is No. 2-D diesel fuel.
Claim 9
Dependent Claim
26 words
The process of claim 7 in which said aqueous emulsion of bituminous material contains from about 56 percent to about 64 percent by weight of asphalt.
Claim 10
Dependent Claim
50 words
The process of claim 7 in which said composition is formed by blending together No. 2- D diesel fuel and an aqueous asphalt emulsion containing from about 56 percent to about 64 percent by weight of asphalt in a volume ratio of diesel fuel to asphalt emulsion of about 2:7.
Claim 11
Dependent Claim
53 words
The process of claim 7 in which said composition contains from about 30 percent to about 45 percent by weight of bituminous material and is applied to said paper sheet at a paper temperature of from about 120* to about 180* F. in a weight ratio of composition to paper of about 1:20.
Claim 12
Dependent Claim
62 words
A water repellent coating composition which is formed by blending togEther an organic solvent and an aqueous asphalt emulsion containing from about 56 percent to about 64 percent by weight of asphalt in a volume ratio of organic solvent to asphalt emulsion of about 2:7, so that substantially all of said organic solvent is dispersed in the water phase of said emulsion.
Claim 13
Dependent Claim
26 words
The composition as defined in claim 13 wherein said organic solvent has a boiling point in the range of from about 335* to about 670* F.
Claim 14
Dependent Claim
16 words
The composition as defined in claim 13 wherein said organic solvent is No. 2-D diesel fuel.
Claim 15
Dependent Claim
25 words
The composition as defined in claim 13 wherein the asphalt content is from about 30 percent to about 45 percent by weight of said composition.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |