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Water proofing membrane, and a method for making a water proofing membrane

a water proofing membrane and water proofing technology, applied in papermaking, transportation and packaging, synthetic resin layered products, etc., can solve the problem of not being able to easily reach the bituminous mass, and achieve the effect of reducing the reflective effect of titanium dioxide, increasing heat absorption, and worsening heat absorption over tim

Inactive Publication Date: 2015-10-01
ICOPAL DANMARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text is about a solution to a problem of "oil migration" that can cause dark spots on a membrane and increase its risk of absorbing heat. The solution involves adding water-repellent properties to the membrane to make it easier to clean and reduce the risk of exudation (the process of expelling material from a membrane). This is achieved by adding a small amount of a polyurethane polymer to decrease water absorption and increase durability in outdoor settings. Overall, the invention aims to reduce the tendency of oil migration and improve the reflective effect of the membrane.

Problems solved by technology

The acrylic polymer also forms to some extend a barrier against ultraviolet rays so that the latter cannot easily reach the bituminous mass.

Method used

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  • Water proofing membrane, and a method for making a water proofing membrane
  • Water proofing membrane, and a method for making a water proofing membrane
  • Water proofing membrane, and a method for making a water proofing membrane

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Embodiment Construction

[0025]Fig. a shows a waterproofing membrane 1 comprising a structure incorporating a fibre layer 10 and carrying a bituminous mass 15 on the side to be arranged in contact with a building structure, the other side carrying a layer 20 of a substance comprising acrylic polymer mixed with titanium dioxide and a transparent or translucent hydrophobic material, the layer 20 defining the surface S of the membrane 1 that is exposed to the weather. The transparent or translucent nature of the hydrophobic material allows for the titanium dioxide pigment to be distinguishable such that the membrane appears white, the titanium dioxide giving light and heat reflective properties to the membrane. A suitable method of making the substance, also referred to in the appended claim 1 as the “first substance”, includes the steps of adding the acrylic polymer, the titanium dioxide and the hydrophobic material separately to a mixer under continued agitation.

[0026]An example of a method for applying a bi...

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Abstract

The invention relates to a waterproofing membrane (1) comprising a structure incorporating a fiber layer (10) and carrying a bituminous mass (15) on one side, the other side carrying a layer (20) of a first substance comprising between 10% and 40% by dry weight of an acrylic polymer mixed with between 4% and 40%, preferably between 20% and 40%, by dry weight of titanium dioxide and at least 1% by dry weight of a transparent or translucent hydrophobic material, said layer (20) defining a surface (S) of said membrane (1).

Description

FIELD OF THE INVENTION[0001]The present invention relates to a water proofing membrane, such as for application on a building roof, comprising a structure incorporating a fibre layer, such as a glass fiber web, carrying a bituminous mass on one side and where the other side of the fiber layer has a substance comprising titanium dioxide and an acrylic polymer.BACKGROUND OF THE INVENTION[0002]Such a waterproofing membrane is known from WO 2004 / 070107. For manufacturing the known membrane, the bituminous mass is applied to the one side of the structure where on the other side a cover layer formed by a substance comprising particulate titanium oxide and an acrylic polymer has been applied. The substance is applied as a coating to the fiber layer before the bituminous mass is applied. The acrylic polymer reduces exudation, as discussed also in EP 876 532 and EP 1 252 386, which would otherwise give rise to brown stains forming on the upper side of the membrane. The acrylic polymer also f...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E04D5/02E04D5/08D06N5/00
CPCE04D5/02E04D5/08D06N5/003B32B11/10E04D5/10B32B2255/02B32B2255/26B32B2307/416B32B2307/7265B32B2307/73B32B2419/06Y10T428/273Y10T428/31551Y10T428/31663Y10T428/31801Y10T428/31815
Inventor BADER, SEVERINEDUJEANCOURT, FRANCKVIDAL, FLORENCEMADEC, YVES
Owner ICOPAL DANMARK
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