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Coating for granulated products to improve granule adhesion, staining, and tracking

a technology of coating and granules, applied in the direction of synthetic resin layered products, weaving, transportation and packaging, etc., can solve the problems of reducing the life of the roof, granule rub loss, and affecting the aesthetics of the roofing system, so as to improve the resistance to staining and reduce the resistance to rub o

Inactive Publication Date: 2006-01-05
BUILDING MATERIALS INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] Following the application of the acrylic latex coating, the structure is then dried to form an acrylic latex coated granule surface asphalt building product having increased rub off resistance, improved tracking resistance, and resistance to staining. Optionally, as an alternative to applying the acrylic latex coating during the manufacturing process, the acrylic latex coating may be applied following the production of the granule surface asphalt building product.
[0015] Following the application of the acrylic latex coating the structure is then dried to form a granule surfaced building product having increased rub off resistance and resistance to staining.

Problems solved by technology

In the case of some asphaltic roofing products, loss of granules reduces the life of the roof, since it is associated with acceleration of photo-degradation of the asphalt.
In addition, the aesthetics of the roofing system may be compromised if granules are lost.
This may occur during installation of the building material product; during maintenance; or may result from environmental conditions.
Buiding products are especially susceptible to granule rub loss and tracking at elevated temperatures, in which granule loss and tracking may occur when an individual walks on the roof, leaving footprints or skuffs permanently imprinted into the roofing or walk on the building product while it is stored or shipped.
This creeping or adsorption of the asphalt oils on the granules' surface causes discoloration or staining of the granules and hence reduces the building material products aesthetic effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Granule Adhesion Measurement of Latex Coated Asphalt Roofing Products

[0034] Latex coated test samples and control samples were produced and tested for granule adhesion in accordance with ASTM standard D 4977 utilizing a 3M RTM 400 four-head tester granule adhesion test apparatus, a 3M abrasion test brush and balance.

[0035] Control samples were first produced from granule embedded rolled polymer modified asphalt-roofing. The rolled asphalt-roofing comprised a non-woven polyester mat substrate having a polymer filled asphalt coating and embedded granules. Six control samples were prepared from a rolled asphalt-roofing sheet by cutting six specimens, wherein two of the samples were cut from a middle region of the sheet adjacent to the machine direction; two samples were cut two inches in from the non-selvege edge adjacent to the machine direction and two samples were cut two inches in from the selvege edge adjacent to the machine direction, the machine direction being the direction i...

example 2

Granule Stain Testing of Latex Coated Asphalt Roofing

[0038] Latex coated test samples and control samples were produced and tested for granule staining in accordance with the below disclosed testing procedure utilizing a force hot dry oven and a Macbeth color surveillance system.

[0039] Control samples were first cut from granule embedded rolled modified asphalt-roofing. The asphalt-roofing comprised a non-woven polyester substrate coated with polymer filled asphalt upon which granules were embedded. Three 10″×10″ control samples were prepared from rolled asphalt-roofing where a first control sample was cut two inches in from the selvege edge, another sample was cut from a middle region of the sheet; and a third sample was cut four inches in from the non-selvege edge. Three 10″×10″ latex coated test samples were then cut in the above manner from a latex coated asphalt-roofing product. The tests specimen were then heated in a force hot dry oven for approximately four hours at a temp...

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Abstract

A building material product and a method of making building material products, having increased resistance to granule rub off and staining. The building material product comprises a substrate having embedded granules and an acrylic latex coating positioned on the granules, where the polymer of the acrylic latex coating has the repeating structural unit [CH2—C(R1)(R2)], where R1 is hydrogen or C1-C8 alkyl; R2 is hydrogen, cyano or —COOR; and R is a linear or branched hydrocarbon containing 1-22 carbon atoms, with the proviso that R1 and R2 are both not hydrogen. The method includes applying this acrylic latex water based composition to a granule embedded substrate.

Description

FIELD OF INVENTION [0001] This invention relates to granule surface building products, and more particularly, to granule surface building material products having exceptional granule rub loss qualities, improved staining and improved tracking at high temperatures. BACKGROUND OF INVENTION [0002] Building products have utilized granule coated or embedded surfaces in a variety of anti-slip, weather-resistant, fire-resistant, and decorative surface applications. These building products include asphalt and non-asphaltic materials. [0003] Asphalt building products may comprise felt or fabric stock impregnated with asphalt and covered with weather resistant mineral granules. Some examples of asphalt building products include asphalt shingles, asphalt siding, and rolled roofing. Typically, rolled roofing comprises modified bitumen asphalt including a polymer filling and asphalt roofing shingles comprise non-modified bitumen asphalt, which may include limestone as an additive. Alternatively,...

Claims

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Application Information

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IPC IPC(8): B32B27/20B32B5/24B32B5/18B32B27/02B32B5/16B32B17/04B32B17/02
CPCB32B5/02Y10T428/24372B32B17/04C08K9/02C08K9/10C08L95/00C09D133/14D06N5/00E04D5/12B32B11/02B05D1/28B05D1/02D06N2203/08B05D7/52B05D1/38B05D2252/02B05D2502/005D06N5/003D06N2211/06D06N2211/063D06N2211/066E04D1/28B05D7/02B05D7/04B05D2520/00D06N2203/04B05D1/18B05D7/00B05D2502/00B05D1/36B05D2201/02B05D2520/05D06N2203/041C08L2666/72C08L2666/04Y10T442/2041Y10T442/2098Y10T442/2107Y10T442/2115Y10T442/2123Y10T442/2131Y10T442/2861Y10T442/2992
Inventor GRUBE, LOUIS L.DE SOUTO, MICHAEL D.RUFFINE, ANTHONY
Owner BUILDING MATERIALS INVESTMENT