US4405680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofing shingle
Assignee: Kraton Polymers US LLC
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Filing: 1982-12-23
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Granted: 1983-09-20
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Expires: 2002-12-23
Abstract
Abstract This invention relates to a roofing shingle having improved low temperature flexibility comprising a flexibilized mat prepared by impregnating a glass fiber web with the blend of an unblown asphalt and a monoalkenyl arene-conjugated diene block copolymer, wherein the flexibilized mat is coated with a blend of an air-blown bitumen and a filler.
Inventors
- 👤 David R. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
D; D06; D06N; D06N5/00; E; E04; E04D; E04D5/00; E04D5/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/25; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2049; Y10T442/2057; Y10T442/2074; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A roofing shingle having improved low temperature flexibility comprising: (a) a flexibilized mat prepared by impregnating a fiber glass mat with a mixture of about 70 to about 94 percent by weight of an unblown bitumen having an asphaltene content (heptane insolubles) below twenty percent by weight and about 6 to about 30 percent by weight of a monoalkenyl arene-conjugated diene block copolymer; and (b) an asphalt composition coated on at least one surface of said flexibilized mat, said asphalt composition comprising the blend of a blown bitumen and a filler, said asphalt composition having a softening point of about 100° C. to about 120°0 C.
Claim 2
Dependent Claim
106 words
A roofing shingle having improved low temperature flexibility comprising: (a) a flexibilized mat prepared by impregnating a fiber glass mat with a mixture of about 70 to about 94 percent by weight of an unblown bitumen having an asphaltene content (heptane insolubles) below twenty percent by weight and about 6 to about 30 percent by weight of a monoalkenyl arene-conjugated diene block copolymer; and (b) an asphalt composition coated on at least one surface of said flexibilized mat, said asphalt composition comprising the blend of a blown bitumen and a filler, said asphalt composition having a softening point of about 100° C. to about 120°0 C.
Claim 3
Dependent Claim
15 words
The shingle according to claim 1 wherein said block copolymer is a styrene-butadiene block copolymer.
Claim 4
Dependent Claim
12 words
The shingle according to claim 1 wherein said filler is calcium carbonate.
Claim 5
Dependent Claim
42 words
The shingle according to claim 1 wherein said block copolymer component and said unblown bitumen component are selected such that the resulting mixture is compatible and has a Ring and Ball softening point of between about 85° C. and about 130° C.
Claim 6
Dependent Claim
33 words
The shingle according to claim 1 wherein the amount of filler in the blend of said blown bitumen and said filler is between about one percent by weight and 80 percent by weight.
Claim 7
Dependent Claim
18 words
The shingle according to claim 1 wherein said fiber glass mat is formed from resin modified glass fibers.
Claim 8
Dependent Claim
23 words
The shingle according to claim 6 wherein said resin is selected from the group consisting of phenol formaldehyde resins and urea formaldehyde resins.
References Cited (Backward Citations)
US3096196A
Cited
US3931440A
Cited
US4082885A
Cited
US4135022A
Cited
US4259127A
Cited
US4269886A
Cited
US4357377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |