CA2569058A1

CA2569058A1 - Asphaltic foam

Info

Publication number: CA2569058A1
Application number: CA002569058A
Authority: CA
Inventors: George F. Thagard, Iii; Casey G. Tzeng
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-20
Filing date: 1995-10-19
Publication date: 1996-05-02
Anticipated expiration: 2015-10-19
Also published as: CA2569058C

Abstract

An asphaltic polyurethane or isocyanurate foam (12) useful in roofing applications. The foam is made from asphalt having a penetration range of between approximately 5-25, a softening point of between approximately 120°F and 200°F, and an asphaltene content of no more than about 30%. This asphalt is liquified and mixed with a mixture of polyols such as Voranol 270, Multranol 9138, and castor oil. Other chemicals, such as a surfactant, a viscosity reducer, and a flame retardant can also be included in this mixture. The mixture is then brought to a temperature of between approximately 140°F
and 220°F, mixed with water and a polyisocyanate in a molar ration of polyisocyanate: polycol of between about 0.95:1 and about 1.3:1, and reacted to form an asphaltic polyurethane foam.
Alternatively, a molar ratio of polyisocyanate: polyol of between about 2.0:1 and about 2.7:1 can be used. In this case, an asphaltic isocyanurate foam is produced.

Claims

1. A ridge cap having a lower surface adapted to be placed in contact with a roof of a building and an upper surface, said ridge cap further comprising:

a longitudinal axis having a front end and back end, wherein said ridge cap further comprises at least two sides located axially distal of said longitudinal axis; and a plurality of vents, wherein the outlet ends of said vents are located in at least one of said two sides, and wherein each of said plurality of vents extends axially inward toward said central axis.

2. The ridge cap of claim 1, further comprising a central channel in said lower surface located along said longitudinal axis.

3. The ridge cap of claim 2, wherein at least one of said vents further comprises a central channel opening, wherein said opening provides communication between said central channel and said one of said vents.

4. The ridge cap of claim 2, further comprising an intermediate chamber in said lower surface adjacent said central channel, wherein at least one of said vents further comprises an intermediate chamber opening, said opening providing communication between said intermediate chamber and said at least one of said vents.

5. The ridge cap of claim 4, wherein said intermediate chamber further comprises one or more barriers, each of said barriers comprising a proximal end in proximity to said central channel and a distal end adjacent to said intermediate chamber opening of each of said at least one of said vents.

6. The ridge cap of claim 5, wherein each of said one or more barriers comprises a wall extending from said lower surface of said ridge cap.

7. The ridge cap of claim 2, wherein a protruding member extends from a first surface of said central channel, and wherein a second surface of said central channel comprises a notch adapted to receive said protruding member, said protruding member and notch being adapted to cooperate so as to at least substantially block said central channel when said ridge cap is bent and a distal end of said protruding member is thereby made to enter into said notch.

8. The ridge cap of claim 7, wherein said protruding member and notch are located at said back end of said ridge cap.

9. The ridge cap of claim 7, wherein said protruding member and notch are located intermediate said front end and said back end of said ridge cap.

10. The ridge cap of claim 7, additionally comprising a second notch and a second protruding member, wherein said second protruding member and second notch are adapted to cooperate so as to at least substantially block said central channel when said ridge cap is bent and a distal end of said second protruding member is thereby made to enter into said second notch.

11. The ridge cap of claim 1, wherein at least one of said plurality of vents comprises a segment which extends at an angle with respect to another segment of said vent.

12. The ridge cap of claim 1, wherein said angle is approximately 30°.

13. The ridge cap of claim 1, wherein said upper surface of said front end further comprises a raised member having a first surface, said lower surface of said back end comprising a cavity having a second surface, wherein said first surface of said raised member is adapted to be able to contact or be placed in proximity to a said second surface of a cavity of a second ridge cap, said raised member of said ridge cap thereby cooperating with said cavity of said second ridge cap to interconnect said ridge cap with a second ridge cap.

14. The ridge cap of claim 13, wherein modified asphalt is placed in contact with or adjacent to said first surface of said raised member.