US2022429A - Non-blistering roofing and method of preparing same - Google Patents
Non-blistering roofing and method of preparing same Download PDFInfo
- Publication number
- US2022429A US2022429A US709663A US70966334A US2022429A US 2022429 A US2022429 A US 2022429A US 709663 A US709663 A US 709663A US 70966334 A US70966334 A US 70966334A US 2022429 A US2022429 A US 2022429A
- Authority
- US
- United States
- Prior art keywords
- roofing
- asphalt
- blistering
- powder
- felt
- 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
- 238000000034 method Methods 0.000 title description 10
- 239000010426 asphalt Substances 0.000 description 21
- 239000000843 powder Substances 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 15
- 238000000576 coating method Methods 0.000 description 15
- 229920006395 saturated elastomer Polymers 0.000 description 9
- 239000011435 rock Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000010410 dusting Methods 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- 239000005871 repellent Substances 0.000 description 4
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010037844 rash Diseases 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical group [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
- D21J1/08—Impregnated or coated fibreboard
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2041—Two or more non-extruded coatings or impregnations
- Y10T442/2098—At least two coatings or impregnations of different chemical composition
- Y10T442/2107—At least one coating or impregnation contains particulate material
Definitions
- This invention relates to non-blistering asphalt roofing and a method of preparing the same.
- Asphalt roofing commonly consists of a felt base saturated with asphalt, a layer of air-blown asphalt upon the felt, and usually crushed rock particles as a coating material.
- blistering which occurs particularly on sunny days following wet weather.
- the blisters are in the form of small eruptions which may be very thick, and disfigure the roofing. They are especially objectionable on roofing which is coated with crushed rock particles, since the color effect may be completely spoiled by the black asphaltic eruptions.
- the blisters appear to originate at the inter-face of the felt and the asphalt, and they are apparently formed by bubbles of combined water and oil vapors which form at the felt-asphalt inter-face and increase in size until they break.
- the blistering tendency may be largely or completely overcome by dusting the felt with a dust or fine powder which inhibits the formation of large bubbles on the felt.
- a water-repellent such as a waterinsoluble stearate, for example such as zinc or calcium stearate, is preferred. It has been discovered, however, that other inert powders such as powdered mica or talc will likewise prevent the blistering.
- the saturated felt is dusted with the powder, and the air-blown asphalt layer then spread over the powder. Crushed rock may be applied if desired.
- Roofing treated under this process does not blister under the most rigid tests provided by the roofing manufacturers, even when used in connection with rock particles which are known to increase the blistering tendency.
- the method of preventing blistering in roofing comprising an asphalt-saturated felt base andan air-blown asphalt coating thereon which comprises dusting the felt with an inert powder before applying the air-blown asphalt coating thereto.
- roofing comprising an asphalt-saturated felt base, an inert powder coating upon said base,
- roofing comprising an asphalt-saturated felt base, an inert powder coating upon said base, an air-blown asphalt coating thereon and a layer of crushed rock particles upon said asphalt.
- roofing comprising an asphalt-saturated felt base, water-repellent powder coating upon said base, and an air-blown asphalt coating thereon.
- roofing comprising an asphalt saturated base and a water-repellent powder coating upon said base, and an air-blown asphalt coating thereon, and a layer of crushed rock particles upon said asphalt.
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
Patented Nov. 26, 1935 PATENT OFFICE NON-BLISTERING ROOFING AND METHOD OF PREPARING SAME Charles J. Merriam, Winnetka, Ill., assignor to Stephen G. Wright, Chicago, Ill.
No Drawing. Application February 3, 1934, Serial No. 709,663
14 Claims.
This invention relates to non-blistering asphalt roofing and a method of preparing the same.
Asphalt roofing commonly consists of a felt base saturated with asphalt, a layer of air-blown asphalt upon the felt, and usually crushed rock particles as a coating material. One of the difficulties met with in the use of such asphalt roofing is what is known as blistering, which occurs particularly on sunny days following wet weather. The blisters are in the form of small eruptions which may be very thick, and disfigure the roofing. They are especially objectionable on roofing which is coated with crushed rock particles, since the color effect may be completely spoiled by the black asphaltic eruptions. The blisters appear to originate at the inter-face of the felt and the asphalt, and they are apparently formed by bubbles of combined water and oil vapors which form at the felt-asphalt inter-face and increase in size until they break.
It has now been discovered that the blistering tendency may be largely or completely overcome by dusting the felt with a dust or fine powder which inhibits the formation of large bubbles on the felt. A water-repellent such as a waterinsoluble stearate, for example such as zinc or calcium stearate, is preferred. It has been discovered, however, that other inert powders such as powdered mica or talc will likewise prevent the blistering.
In carrying out the invention the saturated felt is dusted with the powder, and the air-blown asphalt layer then spread over the powder. Crushed rock may be applied if desired.
Roofing treated under this process does not blister under the most rigid tests provided by the roofing manufacturers, even when used in connection with rock particles which are known to increase the blistering tendency.
The function of the powder is not thoroughly understood, although it is believed that it counteracts a tendency of water to evaporate from the points of the felt fibres, either by keeping the tips free from water, or by providing a greater number of small nuclei for evaporation.
The foregoing detailed description has been given for cleamess of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should .be construed as broadly as permissible, in view of the prior art What I claim as new and desire to secure by Letters-Patent is:'
1. The method of preventing blistering in roofing comprising an asphalt-saturated felt base andan air-blown asphalt coating thereon which comprises dusting the felt with an inert powder before applying the air-blown asphalt coating thereto.
2. The method of preventing blistering in roofing comprising an asphalt-saturated felt base and an air-blown asphalt coating thereon which comprises dusting the felt with a water-insoluble stearate before applying the air-blown asphalt coating thereto.
3. The method as set forth in claim 2, in which 15 the stearate is zinc stearate.
4. The method as set forth in claim 1, in which the powder is talc.
5.. The method as set forth in claim 1, in which the powder is mica. 6. Roofing comprising an asphalt-saturated felt base, an inert powder coating upon said base,
and an air-blown asphalt coating thereon.
7. Roofing as set forth in claim 6, in which the powder is a water-insoluble stearate. 8. Roofing as set forth in claim 6, in which the Powder is a zinc stearate.
9. Roofing as set forth in claim 6, in which the powder is a powdered mica.
10. Roofing as set forth in claim 6, in which the powder is talc.
11. Roofing comprising an asphalt-saturated felt base, an inert powder coating upon said base, an air-blown asphalt coating thereon and a layer of crushed rock particles upon said asphalt.
12. The method of preventing blistering in roofing comprising an asphalt-saturated felt base and an air-blown asphalt coating thereon which comprises dusting the felt with a water-repellent powder before applying the air-blown asphalt coating. I
13. Roofing comprising an asphalt-saturated felt base, water-repellent powder coating upon said base, and an air-blown asphalt coating thereon.
14. Roofing comprising an asphalt saturated base and a water-repellent powder coating upon said base, and an air-blown asphalt coating thereon, and a layer of crushed rock particles upon said asphalt.
CHARLES J. MERRIAM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709663A US2022429A (en) | 1934-02-03 | 1934-02-03 | Non-blistering roofing and method of preparing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709663A US2022429A (en) | 1934-02-03 | 1934-02-03 | Non-blistering roofing and method of preparing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2022429A true US2022429A (en) | 1935-11-26 |
Family
ID=24850824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US709663A Expired - Lifetime US2022429A (en) | 1934-02-03 | 1934-02-03 | Non-blistering roofing and method of preparing same |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2022429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438890A (en) * | 1944-07-29 | 1948-04-06 | Standard Oil Dev Co | Method of making bitumen coated fibrous material |
-
1934
- 1934-02-03 US US709663A patent/US2022429A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438890A (en) * | 1944-07-29 | 1948-04-06 | Standard Oil Dev Co | Method of making bitumen coated fibrous material |
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