Asphaltic sheet materials including expandable graphite

Patent metadata

Field	Value
Publication number	US-2016347033-A1
Application number	US-201615235530-A
Country	US
Kind code	A1
Filing date	Aug 12, 2016
Priority date	Jul 12, 2012
Publication date	Dec 1, 2016
Grant date	—

Abstract

An asphaltic sheet comprising an asphaltic component including an asphalt binder and expandable graphite.

First claim

What is claimed is:

1 . An asphaltic sheet comprising:
(i) an asphaltic component including an asphalt binder and a flame retardant, other than expandable graphite, dispersed within the asphalt binder, said asphaltic component including first and second planar surfaces; (ii) a release film removably secured to said second planar surface; (iii) a polymeric sheet adhesively secured to said second planar surface; and (iv) a concentrated region of expandable graphite at or near at least one of said first and second planar surfaces.

2 . The asphaltic sheet of claim 1 , where said concentrated region of expandable graphite is at or near said second planar surface and is sandwiched between said asphaltic component and said polymeric sheet.

3 . The asphaltic sheet of any of the preceding claims, where said asphaltic component includes from about 0.5 to about 40 parts by weight flame retardant, other than expandable graphite, per 100 parts by weight asphalt binder.

4 . The asphaltic sheet of any of the preceding claims, where said asphaltic component includes from about 3 to about 20 parts by weight flame retardant, other than expandable graphite, per 100 parts by weight asphalt binder.

5 . The asphaltic sheet of any of the preceding claims, where the asphaltic component further includes a polymeric modifier dispersed within the asphalt binder.

6 . The asphaltic sheet of any of the preceding claims, where the polymeric modifier is selected from the group consisting of polybutadiene, polyisoprene, styrene-butadiene rubber, styrene-butadiene block copolymer, styrene-butadiene-styrene block copolymer, random styrene-isoprene, styrene-isoprene block copolymer, styrene-isoprene-butadiene block copolymer, random styrene-isoprene-butadiene, styrene-isoprene-styrene block copolymer, and chloroprene rubber.

7 . The asphaltic sheet of any of the preceding claims, where the polymeric sheet is a polypropylene sheet.

8 . The asphaltic sheet of any of the preceding claims, where said concentrated region of expandable graphite is formed by dropping expandable graphite onto an asphaltic sheet.

9 . The asphaltic sheet of any of the preceding claims, where said flame retardant, other than expandable graphite, is colemanite.

10 . The asphaltic sheet of any of the preceding claims, where said polymeric sheet is a polyolefin sheet.

11 . A method forming an asphaltic composite, the method comprising:
(i) providing an asphaltic sheet, where the asphaltic sheet includes an asphaltic binder and a flame retardant dispersed within said asphaltic binder, and where said asphaltic sheet includes first and second planar surfaces; (ii) introducing expandable graphite to the first planar surface of the asphaltic sheet; (iii) laminating a polymeric sheet to the first planar surface of the asphaltic sheet; and (iv) removably securing a release film to the second planar surface of the asphaltic sheet.

12 . The method of any of the preceding claims, where said step of providing an asphaltic sheet includes submerging a fabric into molten asphalt binder.

13 . The method of any of the preceding claims, where said step of introducing expandable graphite includes dropping expandable graphite onto the first planar surface of the asphaltic sheet.

14 . The method of any of the preceding claims, where said step of laminating a polymeric sheet includes contacting a polymeric sheet to the first planar surface and allowing the adhesive properties of the asphaltic sheet to mate the asphaltic sheet and the polymeric sheet.

15 . The method of claim 14 , where said step of laminating sandwiches at least a portion of the expandable graphite between the polymeric sheet and the asphaltic binder.

16 . The method of claim 11 , where the flame retardant is colemanite.

Assignees

• Firestone Building Prod Co Llc

Inventors

• Zhou Wensheng
• Kirk Donald R
• Young James
• Anderson Robert
• Standeford Joseph
• Black Lance

Classifications

• C09D195/00

  Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch · CPC title

• B32B11/10

  next to a fibrous or filamentary layer · CPC title

• Y10T428/31815

  Of bituminous or tarry residue · CPC title

• C08L2666/55

  Carbon · CPC title

• E04D12/002

  Sheets of flexible material, e.g. roofing tile underlay · CPC title