Sealant composition for releasable shingle

Patent metadata

Field	Value
Publication number	US-2017145271-A1
Application number	US-201715397850-A
Country	US
Kind code	A1
Filing date	Jan 4, 2017
Priority date	Mar 20, 2009
Publication date	May 25, 2017
Grant date	—

Abstract

A sealant composition for roofing shingles that includes a base asphalt, a linear and/or a radial copolymer, oil, and a wax is provided. The linear copolymer has an A-B di-block or an A-B-A tri-block structure. The radial copolymer may have an (A-B) n radial structure, where n is at least 4, or a tri-block (A-B-A) radial structure having from 4 to 8 arms. Blocks A and B may individually represent (1) styrene and butadiene or (2) styrene and isoprene. The oil is a petroleum-based oil that both “softens” the asphalt and reduces the viscosity of the sealant composition. The wax may be a bis-stearamide wax. Additionally, the sealant composition may be reacted with elemental sulfur to crosslink the copolymer blend. The sealant composition seals at temperatures lower than conventional sealants and promotes the easy release of the shingle from a shingle bundle.

First claim

1 - 20 . (canceled)

21 . A composition for a sealant for a roofing shingle comprising:
a hydrocarbonaceous material; a copolymer selected from a linear copolymer, a radial copolymer and combinations thereof, said linear copolymer and said radial copolymer being present in said composition in a total amount of at least 6 weight percent; an oil; and a bis-stearamide wax, wherein said composition reduces the occurrence of said roofing shingles adhering to each other within a packaged bundle of shingles.

22 . The composition of claim 21 , wherein said linear copolymer has an A-B di-block or an A-B-A tri-block structure, and wherein said radial copolymer is selected from a block copolymer having an (A-B)n radial structure where n is an integer of at least 4 and a block copolymer having a tri-block (A-B-A) radial structure having from 4-8 arms.

23 . The composition of claim 22 , wherein said sealant seals at temperatures lower than conventional sealants.

24 . The composition of claim 21 , wherein said radial copolymer is selected from styrene-butadiene-styrene (SBS) radial copolymers and styrene-isoprene-styrene (SIS) radial copolymers; and wherein the copolymer forming said linear copolymer is selected from styrene-butadiene block copolymers and styrene-isoprene block copolymers.

25 . The composition of claim 24 , wherein said radial copolymer and said linear copolymer have a styrene content of less than 50%.

26 . The composition of claim 21 , wherein said oil is selected from petroleum-based oils, naphthenic oils, paraffinic oils and combinations thereof.

27 . The composition of claim 21 , further comprising up to 30% of one or more fillers selected from calcium carbonate, dolomite, wollastonite, talc and silica.

28 . The composition of claim 21 , wherein said hydrocarbonaceous material is an asphalt and said asphalt is present in said sealant composition in an amount from about 74.0% to about 90.5% by weight of said composition; said radial copolymer is present in said sealant composition in an amount from 0% to about 9.0% by weight of said composition; said linear copolymer is present in said sealant composition in an amount from about 2.5% to about 11.0% by weight of said composition; said oil is present in said sealant composition in an amount from about 2.0% to about 7.0% by weight of said composition; and said wax is present in said sealant composition in an amount from about 0.2% to about 5.0% by weight of said composition.

29 . The composition of claim 21 , wherein said sealant composition has a viscosity of no more than 1,500 cP at 350° F.

30 . The composition of claim 21 , wherein said sealant composition seals and bonds shingles at temperatures as low as 40° F.

Assignees

• Owens Corning Intellectual Capital Llc

Inventors

• Loftus James E
• Vermilion Donn R
• Guerra Jason D

Classifications

• B32B1/00

  Layered products having a non-planar shape · CPC title

• C08L95/00

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• Y10T428/24025

  Superposed movable attached layers or components · CPC title

• C08L53/00

  Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers · CPC title

• E04D1/26

  Strip-shaped roofing elements {simulating a repetitive pattern, e.g.} appearing as a row of shingles · CPC title