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US 2017/0362831 A1Published application
Cool roof systems and methods
AssigneeJohns Manville
InventorsLance Wang, Joel Hazy, ChangQing Shen
Life of this patent
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Abstract
A membrane roofing system that includes a waterproof layer that protects an insulation layer and a granule coupled to the waterproof layer. The granule has a 60% or greater reflectivity that reduces transmission of ultraviolet light to the waterproof layer. The granule is coated in a fluorinated acrylic copolymer that resists adsorption and absorption of asphaltic chemicals by the granule from the waterproof layer.
Claims20
A membrane roofing system, comprising:
- a waterproof layer configured to protect an insulation layer;
- and
- an aluminum silicate granule having a particle size between 0.2 mm-2.4 mm coupled to the waterproof layer, wherein the aluminum silicate granule has a 65% or greater reflectivity and is configured to reduce transmission of ultraviolet light to the waterproof layer, and wherein the aluminum silicate granule is, before coupling to the waterproof layer, coated in a cationic fluorinated (meth)acrylic copolymer that resists adsorption and absorption of asphaltic chemicals by the aluminum silicate granule from the waterproof layer.
A built-up roofing system, comprising:
- a first waterproof layer configured to protect an insulation layer;
- a first fiberglass layer configured to support the first waterproof layer;
- and
- an aluminum silicate granule having a particle size between 0.2 mm-2.4 mm coupled to the first waterproof layer, wherein the aluminum silicate granule has a 60% or greater reflectivity and is configured to reduce transmission of ultraviolet light to the first waterproof layer, and wherein the aluminum silicate granule is, before coupling to the first waterproof layer, coated in a fluorinated (meth)acrylic copolymer that resists adsorption and absorption of asphaltic chemicals by the aluminum silicate granule.
1 more element
A method of manufacturing a roofing system, comprising:
- coating an aluminum silicate granule having a particle size between 0.2 mm-2.4 mm and a reflectivity of 60%, wherein the coating comprises a fluorinated (meth) acrylic copolymer that resists adsorption and absorption of asphaltic chemicals by the aluminum silicate granule from a waterproof layer;
- drying the coating on the aluminum silicate granule;
- and
- coupling the coated aluminum silicate granule to the waterproof layer.
1 more element
Dependencies are inferred from the claim text.