US2954302A - Water repellent paper and sheathing board - Google Patents
Water repellent paper and sheathing board Download PDFInfo
- Publication number
- US2954302A US2954302A US627139A US62713956A US2954302A US 2954302 A US2954302 A US 2954302A US 627139 A US627139 A US 627139A US 62713956 A US62713956 A US 62713956A US 2954302 A US2954302 A US 2954302A
- Authority
- US
- United States
- Prior art keywords
- paper
- water
- emulsion
- gypsum
- board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 53
- 239000005871 repellent Substances 0.000 title claims description 29
- 230000002940 repellent Effects 0.000 title description 16
- 239000000839 emulsion Substances 0.000 claims description 33
- 229910052602 gypsum Inorganic materials 0.000 claims description 32
- 239000010440 gypsum Substances 0.000 claims description 32
- 239000010747 number 6 fuel oil Substances 0.000 claims description 20
- 230000035515 penetration Effects 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 22
- 239000011248 coating agent Substances 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000004945 emulsification Methods 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 4
- 239000007764 o/w emulsion Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
Definitions
- the invention contemplates the emulsification water of bunker C, grade No. 6 fuel oils which are of certain limited physical characteristics and in certain emulsification proportions, and, further, the application of such emulsions to one surface of a paper web at. specified conditions and rates of application.
- an oil-in-water emul-i sion is prepared with grade No. 6fuel oils, also known as bunker C oil, using suitable emulsifying equipment and suitable emulsifying agents, which arein common practice in the art of emulsification, and Preferably maintaining temperatures during .emulsification of from F. to, 180 F.
- the emulsions include from 40% to' 70,%
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Description
Se t. 27, 1960 w. s. GORMAN, JR
WATER REPELLENT PAPER AND SHEATHING BOARD Filed Dec. 10, 1956 GRADE NO.6 WATER FUEL on.
40% TO 70% ou IN WATER EMULSIQN i 4 v lg |2o-|aor-'.
PAPER WEB Fig. I
AQUEOUS CALCINED GYPSUM SLURRY 2 INVENTOR.
William S. Gormon Jr.
The water-affecting characteristics desired in the coversheets for gypsum sheathing board are known to be of an unusual-character, difiicult to attain in a practical and commercially acceptable manner. To obtain the essential bond between the gypsum plaster and paper cover-. sheets, the paper bottom-surface should have substantial Water absorptivity, relative to the water repellent top surface, whereby the plaster slurry is absorbed into the paper bottom surface to form a continuous bondand keying of the subsequently hardened or set gypsum there-.
to. It will also be apparent that for commercially practical drying of the set gypsum core, a substantial porosity of the cover-sheets is essential for removal therethrough of the water or water vapor to be driven off in drying the core.
Thus, attempts to provide, in combination with these paper cover-sheet bottom-surface characteristics, further characteristics of a highly weather resistant or water repellent top-surface are obviously seriously restricted. The top-surface must be maintained sufiiciently porous to permit the above discussed gypsum core drying at a practical rate. Means are thus desired for treating generally the individual fibers or fiber groups with a highly non-continuous, water repellent top-surface coating.
A considerable advantage is obtained if this coating can be applied during paper manufacture, avoiding serious technical handicaps which arise in attempting to coat paper at a board forming machine or the marked economic disadvantages in coating the board subsequentto gypsum board manufacture. Coating one surface of paper for water repellency during the paper manufacture, to provide a finished paper free of such coating on its opposite surface, requires a Water repellent coating which, while highly attracted and adhered to: the top-surface, does, not penetrate through the paper destroying the necessary water absorptivity of the opposite surface, and further does not transfer to the bottom surface of the adjacent convolution when rolled into the finished paper roll.
The requirements sought in a coating material and method are thus not only difficult to attain insofar as the combination of vapor-permeability and water-repellency, but even more difficult because of the essential application characteristics.
It is an object of the present invention to provide a PatentedSept. 27, 1.960
2 water repellent coating and method of application which fulfills the above requirements and is further susceptible of highly practical and economical application to one surface of a paper web during manufacture.
Further objects are to produce a. satisfactory water repellent coating which will not penetrate completely through heavy paper and will not affect water absorbency characteristics of the surface of the paper that is to be bonded to the gypsum core and which will not adversely affect the vapor permeability, or other characteristics Of. the paper vital for the manufacture of gypsum sheathing board. f 4
Another object is to eliminate the necessity of aging of the paper before it can be satisfactorily used in gypsum board manufacture. 1 5
It is a further object to provide anovel coating which is comprised of-low-cost and readily available materials; Briefly, the invention contemplates the emulsification water of bunker C, grade No. 6 fuel oils which are of certain limited physical characteristics and in certain emulsification proportions, and, further, the application of such emulsions to one surface of a paper web at. specified conditions and rates of application.
These and other objects of .the invention will be more" readily apparent when considered in relation to the pre,-, ferred embodiment as set forth in the specification shown in the drawings in which: o
Fig. 1 .is a schematic diagram of the methodv of making, vapor-permeable gypsum sheathing cover paper, in ac cordance with the invention. T
Fig. 2 is a schematic diagram of the process of water-repellent gypsum, sheathingboard with the cover paper of Fig. 1, in accordance with the invention.
In accordance with the invention, an oil-in-water emul-i sion is prepared with grade No. 6fuel oils, also known as bunker C oil, using suitable emulsifying equipment and suitable emulsifying agents, which arein common practice in the art of emulsification, and Preferably maintaining temperatures during .emulsification of from F. to, 180 F. The emulsions include from 40% to' 70,%
of the specified fuel oil, by volume, in water, and, are.-
preferably of an oil-to-water ratio of approximately 6Q to 40. A volatile emulsifying agent additive is especially advantageous in that after application of the emulsion to the paper the inactive water and emulsifying agent. ingredients can be most rapidly evaporated off. For ex ample, 1% of each of morpholine and oleic acid has been.
found to provide the desired quality of emulsifying agent. i
in accordance with the invention.
Grade No. 6 fuel oil is a residual, thick, black oil, defined in A.S.T.M. Tentative Specifications for Fuel Oils, D396-48T, as an oil for use iii burners, equipped. with preheaters permitting a high viscosity fuel, and, isvv qualified therein by the following data:
Minimum flash point Maximum water and sediment, by volume percent 2.00
Saybolt viscosity, Furol 122 F. sec 45 to 30,0 Kinematic viscosity 122 F., in \centisto'kes" 92 to. 6.38
anoe with the invention.
Referring to Fig. 1, in the preferred form of them-- vention, a 60% oil emulsion, prepared as above defined,
is applied, at a temperature of from 120 F. to 180F151;
to the top-surface of the relatively heavy paper web 10 at a paper machine calender stack 12, whereatthe paper is also at a temperature in the order of 180"F,;"
using a conventional water box 14 at the calender stack. The paper will absorb from 2 to 7 pounds of the emulsion per thousand square feet of paper at ordinary paper machine speeds. Best results may be obtained using a paper which has beenpreviously sized with conventional sizing agents, such'as rosin size.
The emulsion of the invention is very rapidly absorbed by the fibrous material at the top-surface of the paper web due to the sufficiently low viscosity of the emulsion. It has been found, further, that an emulsion of grade No. 6 fuel oil, applied at the above calender stack temperatures, very rapidly loses its water content, leavinga highly adherent, water repellent coating disposed upon the individual fibers or fiber groups of the paper, within the very short time interval, in the order of 4 to seconds, prior to its beingrolled, as in roll 16. This coating is thus formed of a relatively high viscosity material, which has been Well absorbed while in the emul sion state, whereby there is substantially no subsequent penetration of the fuel oil through the web to the opposite face, nor is there transfer of the fuel oil to the bottom-su|rface of the paper of the adjacent convolution in the ultimatepaper roll, which will appreciably afiect the absorption properties of the paper bottom-surface. Prior paper cover-sheets for gypsum sheathing, treated to provide a suitable water repellcncy on the top-surface, have been subject to excessive penetration or transfer of the water repellent coating applied, thus, the bottomsurface of such paper is detrimentally water repellent, hampering the bond between the subsequently formed gypsum core and the paper bottom-surface. Furthermore, prior coatings for water repellency have all decreased substantially the vapor permeability and hampered the drying of the subsequently formed gypsum sheathing board.
Grade No. 6 fuel oil is a petroleum product of certain above defined characteristics which have been found highly advantageous when used in accordance with the invention. The particular characteristics which define a grade No. 6 fuel oil have been found to be the particular characteristics desired to be employed in the process of the invention. It will be realized, however, that grade No. 6 fuel oil is not a single definite chemical product, but instead is a class of petroleum products from which it has been found that an improved water repellent coating may be provided in accordance with the invention. Although not all grade No. 6 fuel oils are in all ways similar one to another, to thus all provide a constant optimum resultant water repellency, all do provide a novel improved repellency, free from the disadvantages of penetration and transfer, when used in accordance with the invention.
Fig. 2 is a schematic diagram of the manufacture of gypsum sheathing board 18 from the coated paper of rolls 16, employing the usual gypsum board forming methods and equipment. A water slurry of calcined 'gypsum 20 is disposed between the uncoated bottom surfaces of two opposed water repellent paper cover sheets having on the outwardly disposed top surfaces thereof a vapor-permeable coating of grade No. 6 fuel oil. The untreated and non-repellent bottom surfaces of the cover sheets are relatively absorbent of the gypsum slurry, whereby, after forming, by means of a forming master T011 22, and subsequent setting and drying of the paper covered gypsum sheathing board, a highly satisfactory gypsum to paper bond is obtained, providing an improvedresultant water repellent gypsum sheathing.
Having completed a detailed disclosure of the preferred embodiments of my invention so that those skilled in the art may practice the same, I contemplate that variations may be made without departing from the scope of the invention as defined in the appended claims.
I claim:
1. A method of making vapor-permeable, gypsumsheathing cover-paper having a coated water-repellent surface and an opposite surface substantially free of said coating, comprising the steps of forming an oil-in-Water emulsion of from 40% to 70% grade No. 6 fuel oil and water, applying said emulsion to only one surface of a paper-Web of about .020 inch thickness with less than complete through penetration of said paper by said emulsion, and drying said coated-paper to remove the excess water therefrom.
2. A method of making vapor-permeable, gypsumsheathing cover-paper having a coated water-repellent surface and an opposite surf-ace substantially free of said coating, comprising the steps of forming an oil-in-w-ater emulsion of from 40% to 70% grade No. 6 fuel oil and water, applying said emulsion to only one surface of a heavy paper-web at a rate of from 2 to 7 pounds of emulsion per thousand square feet of paper with less than complete through penetration of said paper by said emulsion, and drying said coated-paper to remove the excess water therefrom.
3. A method of making vapor-permeable, gypsumsheating cover-paper having a coated, water-repellent surface and an opposite surface substantially free of said coating, comprising the steps of forming an oil-in-water emulsion of from 40% to 70% grade No. 6 fuel oil and water, and applying said emulsion to only one surface of a heavy paper-web at an emulsion temperature of from F. to'180" F. with less than complete through penetration of said paper by said emulsion.
4. A method of making vapor-permeable, gypsumsheathing cover-paper having a coating, water-repellent surface and an opposite surface substantially free of said coating, comprising the steps of forming at 120 F. to 180 F. an oilin-water emulsion of from 40% to 70% grade No. 6 fuel oil and water, and applying saidemulsion at said temperature to only one surface of a heavy paper- Web with less than complete through penetration of said paper by said emulsion, said paper-web being at a temperature of from 120 F. to 180 F.
5. A method of making vapor-permeable, gypsumsheathing cover-paper having a coated, water-repellent surface and an opposite surface substantially free of said coating, comprising the steps of forming at 120 F. to 180 F. an oil-in-water emulsion offrom 40% to 70% grade No. 6 fuel oil of 70 to seconds viscosity (Furol 122 F.) and water, and applying said emulsion to only one surface of a heavy paper-web at a temperature of from 120 F. to F. with less than complete through penetration of said paper by said emulsion.
6. The process of making water-repellent, gypsum, sheathing-board, comprising the steps of forming an oilin-Water emulsion of from 40% to 70% grade No. 6 fuel oil and water, applying said emulsion to only the topsurface of a heavy paper-web with lessthan complete through penetration of said paper by said emulsion, drying the said coated paper-web to remove the excess water therefrom, subsequently depositing an aqueous, calcinedgypsum slurry adjacent the bottom-surface of said paper, and forming a board therefrom, whereby said gypsum hardens and bonds to said uncoated bottom-surface to provide a strong, water-repellent board.
7. The process of making Water-repellent, gypsum, sheathing-board, comprising the steps of. forming an oilin-water emulsion of from 40% to 70% grade No. 6 fuel oil and water, applying said emulsion at a temperature of from 120 F. to 180 F. to only the top-surface of a heavy paper-web which is at a temperature of from 120 F. to 180 F. with less than complete through penetration of said paper by said emulsion, drying the said coated paper-web to remove the excess water therefrom, subsequently-depositing an aqueous, calcined-gypsum slurry adjacent the bottom-surface of said paper, and forming a board therefrom, whereby said gypsum hardens and bonds to said uncoated bottom-surface to provide a strong, water-repellent board.
.8. The process of making water-repellent, gypsum,
sheathing-board, comprising the steps of forming at from 120 F. to 180 F. an oil-in-water emulsion of from to grade No. 6 fuel oil of 70 to seconds viscosity (Furol 122 F.) and water, applying said emulsion at a temperature of from 120 F. to F. to only the topsurface of a heavy paper-web which is at a temperature of from 120" F. to 180 F. with less than complete through penetration of said paper by said emulsion, drying the said coated paper-web to remove the excess water therefrom, subsequently depositing an aqueous, calcinedgypsum slurry adjacent the bottom-surface of said paper,
6 and forming a board therefrom, whereby said gypsum hardens and bonds to said uncoated bottom-surface to provide a strong, water-repellent board.
References Cited in the file of this patent UNITED STATES PATENTS 1,793,810 Levin Feb. 24, 1931 2,345,142 Muller Mar. 28, 1944 10 2,685,150 Linehan Aug. 3, 1954 2,776,234 Riddell et al. Jan. 1, 1957
Claims (1)
- 6. THE PROCESS OF MAKING WATER-REPELLENT, GYPSUM, SHEATHING-BOARD, COMPRISING THE STEPS OF FORMING AN OILIN-WATER EMULSION OF FROM 40% TO 70% GRADE NO. 6 FUEL OIL AND WATER, APPLYING SAID EMULSION TO ONLY THE TOPSURFACE OF A HEAVY PAPER-WEB WITH LESS THAN COMPLETE THROUGH PENETRATION OF SAID PAPER BY SAID EMULSION, DRYING THE SAID COATED PAPER-WEB TO REMOVE THE EXCESS WATER THEREFROM, SUBSEQUENTLY DEPOSITING AN AQUEOUS, CALCINEDGYPSUM SLURRY ADJACENT THE BOTTOM-SURFACE OF SAID PAPER, AND FORMING A BOARD THEREFROM, WHEREBY SAID GYPSUM
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US627139A US2954302A (en) | 1956-12-10 | 1956-12-10 | Water repellent paper and sheathing board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US627139A US2954302A (en) | 1956-12-10 | 1956-12-10 | Water repellent paper and sheathing board |
Publications (1)
Publication Number | Publication Date |
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US2954302A true US2954302A (en) | 1960-09-27 |
Family
ID=24513346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US627139A Expired - Lifetime US2954302A (en) | 1956-12-10 | 1956-12-10 | Water repellent paper and sheathing board |
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Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3307987A (en) * | 1959-08-12 | 1967-03-07 | Nat Gypsum Co | Process of making a gypsum wallboard having a decreased starch content in the gypsum core |
US3383271A (en) * | 1964-01-20 | 1968-05-14 | United States Gypsum Co | Water repellent gypsum board |
US4810569A (en) * | 1984-02-27 | 1989-03-07 | Georgia-Pacific Corporation | Fibrous mat-faced gypsum board |
US5319900A (en) * | 1984-02-27 | 1994-06-14 | Georgia-Pacific Corporation | Finishing and roof deck systems containing fibrous mat-faced gypsum boards |
US5342680A (en) * | 1988-01-06 | 1994-08-30 | Georgia-Pacific Corporation | Glass mat with reinforcing binder |
US5397631A (en) * | 1987-11-16 | 1995-03-14 | Georgia-Pacific Corporation | Coated fibrous mat faced gypsum board resistant to water and humidity |
US5637362A (en) * | 1993-08-20 | 1997-06-10 | Louisiana-Pacific Corporation | Thin, sealant-coated, fiber-reinforced gypsum panel |
US5644880A (en) * | 1984-02-27 | 1997-07-08 | Georgia-Pacific Corporation | Gypsum board and systems containing same |
US5718797A (en) * | 1994-05-25 | 1998-02-17 | National Gypsum Company | Apparatus for manufacturing gypsum board |
US5718759A (en) * | 1995-02-07 | 1998-02-17 | National Gypsum Company | Cementitious gypsum-containing compositions and materials made therefrom |
US5858083A (en) * | 1994-06-03 | 1999-01-12 | National Gypsum Company | Cementitious gypsum-containing binders and compositions and materials made therefrom |
US20060010800A1 (en) * | 2002-11-05 | 2006-01-19 | Bezubic William P Jr | Cementitious exterior sheathing product with rigid support member |
US20060068188A1 (en) * | 2004-09-30 | 2006-03-30 | Morse Rick J | Foam backed fiber cement |
US7049251B2 (en) | 2003-01-21 | 2006-05-23 | Saint-Gobain Technical Fabrics Canada Ltd | Facing material with controlled porosity for construction boards |
US7155866B2 (en) | 2002-11-05 | 2007-01-02 | Certainteed Corporation | Cementitious exterior sheathing product having improved interlaminar bond strength |
US7846278B2 (en) | 2000-01-05 | 2010-12-07 | Saint-Gobain Technical Fabrics America, Inc. | Methods of making smooth reinforced cementitious boards |
US11536026B2 (en) | 2017-08-14 | 2022-12-27 | Gcp Applied Technologies Inc. | Integral weather barrier panels |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1793810A (en) * | 1928-09-17 | 1931-02-24 | Flintkote Co | Waterproof board and method of preparing same |
US2345142A (en) * | 1940-04-02 | 1944-03-28 | Muller Adalbert | Process for rendering materials water-repellent |
US2685150A (en) * | 1950-07-25 | 1954-08-03 | Crown Zellerbach Corp | Mulching paper |
US2776234A (en) * | 1953-08-04 | 1957-01-01 | Kaiser Gypsum Company Inc | Vapor-permeable gypsum board |
-
1956
- 1956-12-10 US US627139A patent/US2954302A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1793810A (en) * | 1928-09-17 | 1931-02-24 | Flintkote Co | Waterproof board and method of preparing same |
US2345142A (en) * | 1940-04-02 | 1944-03-28 | Muller Adalbert | Process for rendering materials water-repellent |
US2685150A (en) * | 1950-07-25 | 1954-08-03 | Crown Zellerbach Corp | Mulching paper |
US2776234A (en) * | 1953-08-04 | 1957-01-01 | Kaiser Gypsum Company Inc | Vapor-permeable gypsum board |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3307987A (en) * | 1959-08-12 | 1967-03-07 | Nat Gypsum Co | Process of making a gypsum wallboard having a decreased starch content in the gypsum core |
US3383271A (en) * | 1964-01-20 | 1968-05-14 | United States Gypsum Co | Water repellent gypsum board |
US5704179A (en) * | 1984-02-27 | 1998-01-06 | Georgia-Pacific Corporation | Finishing and roof deck systems containing fibrous mat-faced gypsum boards |
US4810569A (en) * | 1984-02-27 | 1989-03-07 | Georgia-Pacific Corporation | Fibrous mat-faced gypsum board |
US5319900A (en) * | 1984-02-27 | 1994-06-14 | Georgia-Pacific Corporation | Finishing and roof deck systems containing fibrous mat-faced gypsum boards |
US5371989A (en) * | 1984-02-27 | 1994-12-13 | Georgia-Pacific Corporation | Use of fibrous mat-faced gypsum board in exterior finishing systems for buildings and shaft wall assemblies |
US5791109A (en) * | 1984-02-27 | 1998-08-11 | Georgia-Pacific Corporation | Gypsum board and finishing system containing same |
US5644880A (en) * | 1984-02-27 | 1997-07-08 | Georgia-Pacific Corporation | Gypsum board and systems containing same |
US5397631A (en) * | 1987-11-16 | 1995-03-14 | Georgia-Pacific Corporation | Coated fibrous mat faced gypsum board resistant to water and humidity |
US5981406A (en) * | 1988-01-06 | 1999-11-09 | G-P Gypsum Corporation | Glass mat with reinforcing binder |
US5718785A (en) * | 1988-01-06 | 1998-02-17 | Georgia-Pacific Corporation | Glass mat with reinforcing binder |
US5342680A (en) * | 1988-01-06 | 1994-08-30 | Georgia-Pacific Corporation | Glass mat with reinforcing binder |
US5637362A (en) * | 1993-08-20 | 1997-06-10 | Louisiana-Pacific Corporation | Thin, sealant-coated, fiber-reinforced gypsum panel |
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