Composition for a roofing material and method of using the same
1. The method of making a roofing material, comprising:
- making a rough surface made of a filler, resin and paint on a substrate that is a first layer for a roof top, wherein the filler is at least one of a sand, silica sand, clashed minerals and combination thereof,spraying a first coat using a first color of a first paint on the entire rough surface at a specific angle;
spraying a second coat using a second color of a second paint in a second specific direction at a glancing angle of at least 60 degree from the roof top to the rough surface; and
applying layer of a photo-catalytic finish to the roofing material.
A roofing material composition and a method of applying that roofing material composition using specific angles to deflect infra-red rays and provide aesthetically nice finish is disclosed. The first coat of the roofing material is light in color and the second color may be a light or a dark color. The rough surface is prepared using specific filler, resin and paint to deflect infra-red rays and reduce heating inside a building.
|ROOFING MATERIAL WITH DIRECTIONALLY DEPENDENT PROPERTIES|
Patent #US 20110183112A1
Current AssigneeCOOL ANGLE LLC
Sponsoring EntityCOOL ANGLE LLC
Patent #US 20100190633A1
Current Assignee3M Innovative Properties Company
Sponsoring Entity3M Innovative Properties Company
|METHOD OF MAKING A SHEET OF BUILDING MATERIAL|
Patent #US 20100215946A1
Current AssigneeG.R. GREEN BUILDING PRODUCTS INC.
Sponsoring EntityG.R. GREEN BUILDING PRODUCTS INC.
- 1. The method of making a roofing material, comprising:
making a rough surface made of a filler, resin and paint on a substrate that is a first layer for a roof top, wherein the filler is at least one of a sand, silica sand, clashed minerals and combination thereof, spraying a first coat using a first color of a first paint on the entire rough surface at a specific angle; spraying a second coat using a second color of a second paint in a second specific direction at a glancing angle of at least 60 degree from the roof top to the rough surface; and applying layer of a photo-catalytic finish to the roofing material.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
The instant application claims priority to U.S. Provisional application 62/068,800 filed on 27 Oct. 2014. The U.S. Provisional application 62/068,800 is hereby incorporated by reference in its entireties for all of its teachings.
The instant application discloses a roofing material composition and method of using the same to display multicolored effect and deflect infra-red rays away from roof top.
Worldwide the roofs are of dark colors. Ideally if the roof is white then it would be optimal for reflecting infra-red rays and reducing the temperature in the house. However, it is not the preferred method. Global warming has created a challenge to reduce energy conservation and reduce cost of living for aging population. There is need to solve this problem by solving this issue of a better roof top design.
The instant disclosure describes several embodiments for a composition for roofing material and method of applying the roofing material to the roof to display different reflective effects and colors, minimizing heat absorption onto the roof surface. In one embodiment, a roofing material for reducing the heat and increasing the deflection of the sun rays are described. In another embodiment, a roofing material comprises of filler, resin, pigment, and solvent. The pigment is a combination of one or more chemical ingredients including titanium dioxide, ferrous oxide, ferric oxide, cupric oxide, cuprous oxide, zinc oxide, carbon, nickel oxide, and cobalt oxide. The one or more chemical ingredients are fine particles of solid chemicals having the mean diameter of primary particle 10 nm-200 nm. In one embodiment titanium dioxide is a major ingredient to reflect sunlight IR effectively. In one embodiment, the method of applying the roofing material using specific sequence of steps and specific material is described.
In one embodiment, a roofing material composition is made up of fillers such as sand or clashed mineral or combination thereof. The sand can be silica sand, beach sand, or any other type of sand. In one embodiment the sand is not only the ordinary sand but is any large particles of metal oxide having enough water resistance and resilience against outdoor weathering. The clashed minerals are minerals of small size and include, but not limited to, quartz, granite, basalt, pegmatite and calcite. In one embodiment, the clashed materials include clashed metal oxide rocks with suitable size. The filler, in another embodiment, has a diameter between 0.1 mm and 3.0 mm.
In another embodiment, the resin is used as a component of the roofing material. In one embodiment, the resin/filler weight ratio varies between ⅓ to ⅔. The resin includes volatile solvent. In another embodiment resin can be resin mixture that includes resin, solvent, and pigment. In one embodiment, the solvent in resin/filler or resin mixture/filler is less than 30 weight percent as the major volatile ingredients. In an embodiment the resin/filler or resin mixture/filler is applied on the surface and is allowed to get dried. In another embodiment, the non-volatile weight percent that is the weight of the resin/filler or resin mixture/filler after the surface gets dried exceeds 70%. The resin/filler ratio is critical as resin/filler weigh ratio in case of more than ⅔ the viscosity of this material is inadequate to form high profiled rough surface by spraying. If the resin/filler weight ratio is less than ⅓ the adhesion of filler particles will decrease and the layer thus formed will be fragile.
In another embodiment, a method of applying the roofing material is described. In yet another embodiment a photocatalytic finish as a last layer for the roofing material is described. Other features will be apparent from the accompanying drawings and from the detailed description that follows.
The embodiments of this invention are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements and in which:
Other features of the present embodiments will be apparent from the detailed description that follows.
The instant disclosure describes a novel composition of a roofing material (composition) and the method of applying the composition of the roofing material to the roof top. Applying this composition and sequential method of applying this roofing material and subsequently the paint it deflects infra-red rays from the roof and as a result reduces the heat inside the house/any building.
We propose a special paint as a roofing material and its application method in achieving the infra-red reflection and maintain dark color tones of conventional roofing. In
We propose here a completely innovative idea which combines paints and their method of coating together to solve this problem perfectly, since otherwise it cannot be solved both practically and theoretically from the improvement approach of paint alone. The roofing material and paint as material and method of coating the same produces at least of two color tones on surfaces of roofing materials. The color tone of the roof surface varies with the direction at which the surface is being observed. The coated roofing material appears to show gradated change in color tone from a lighter tone to a darker tone when the observation angle is changed from 0° to 90°, with respect to the normal of the surface. At normal incidence the material appears white from one angle.
The surface of the roofing material is prepared to give edged roughness. Surfaces with edge roughness (rough surface) are coarse to the touch and have an average height difference exceeding 1 mm. This is achieved by painting the roof top with paints mixed with coarse fillers such as sand, silica sand, or generally clashed minerals and combination thereof. The average aggregate size of the filler has mean diameter ranging from 0.1 mm to 3.0 mm. In another embodiment sprinkling course filler on the wet substrate with applied primer is used to prepare this rough surface. In another embodiment, mixture of resin and filler can be sprayed to get more roughness. In another embodiment, resin mixture comprising resin, solvent, and pigment can be used with filler instead of resin. In this case the filler ingredient works not only to give rise to the surface roughness by itself but also to increase the viscosity and stickiness of the rough material as a whole.
The first coat using a first color may be any light color or white. The second color which is a second paint may be any color of user choice. A specific angle is important for the first paint as it covers the entire rough surface. The second angle various and have been described with examples below. The second specific direction is always only one side so it is visible from the pedestrian angle and aesthetics of the roof is visible for all viewers from the road.
The following composition of the roofing material and paint is especially preferable for this purpose to give the paint the high thixotropic nature and hence form a surface feature full of edged roughness, or, many ups and downs, of which mean height difference exceeds 1 mm and this leads to the sharp contrast of colors observed from different angles. The paint is prepared with the following conditions: Mean diameter of indispensable filler contained should be between 0.1 mm and 0.3 mm. Resin/filler or Resin Mixture/filler weight ratio is between ⅓ to ⅔. Weight ratio of resin/filler or resin mixture/filler is an important feature as ratio of more than ⅔ may increase viscosity of the material and may be inadequate to form high profiled rough surface. Similarly, the ratio of less than ⅓ will decrease adhesion of filler particles even with better roughness. However, range of ⅓ to ⅔ is optimum to have good adhesion and good rough surface. Non-volatile weight percent that is after the surface gets dried should exceed 70%. In an embodiment, a white paint coat is applied onto the entire surface. The white paint is applied evenly without any transparency on the whole surface. But if the enough brightness can be obtained in the first step process already, this process can be abbreviated. Spraying the darker colored paint by spraying in only one direction, at a glancing angle greater than 60 degree from the normal of the surface. From the angle of pedestrian side this dark color can be observed. The roof is considerably rough and can be stained quite easily by the rainfall or dust from the practical sense. This problem could be significantly minimized by the application of photocatalytic finish as the fourth step.
The coat (paint) and coating method (steps) produces at least of two color tones on flat surfaces of the roofing materials. The color tone of the coating varies with the directions at which the surface is being observed. The coated roofing material appears to show a gradual change in color tone from a lighter tone to a darker tone when the observation angle is changed from low to high with respect to the normal of the surface. At normal incidence the material appears white. Sometimes the appearance changes depending on the angle from the observer.
Table 1 shows a comparison of samples A to G with K depicts the importance of spray angle which should be kept at more than 60° glancing angle. If the glancing angle is less than 60 degree then it tends be darker and so will decrease the amount of white color and will in turn decrease the polarization. The table also shows values and comparison of samples A through G and K that depicts the additional effect of spraying angle to the average temperature underneath the substrate. The average temperature decreases as second coat spray angle is increased. Comparison of samples A to G with J depicts the superiority of this invention to conventional roofing material. The average temperature underneath substrate of samples A through G are lower compared in comparison with sample J; of the conventional black smooth asphalt coat on the roof. This indicates that samples A to G have better thermo-shield property. Sample I shows the lowest temperature reading compared to other samples. This is also especially true for spraying angle at 90° (sample A) and 80° (sample B). The average temperature in sample A and B is very close to comparative sample I which is standard conventional complete white surface. Therefore, sample A and sample B with 90 degree and 80 degree second coat spray angle from normal respectively shows better and close performance with polarization effect in comparison to standard surface using complete white color.
In one aspect of the invention the method of using the roofing material is series of steps that uses a specific combination of resin or resin mixture with filler to create a rough edged surface on the roof with a two color roof. The two color roof deflects most of the infra-red rays of the Sun and makes the house cooler. These types of roofing material can be used for any type of roof where there is extreme heat and/or shortage of power to cool the interior of a building.
Although the present embodiments have been described with reference to specific example embodiments, it will be evident that various modifications and changes may be made to these embodiments without departing from the broader spirit and scope of the various embodiments.