IP Library › Granted Patent US 7,901,563
Granted Patent B2
US 7,901,563 · App. 11/345,184 · Granted Mar 8, 2011

Preparation of industrial asphalt

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Quick Facts
Patent No.
US 7,901,563
App. No.
11/345,184
Granted
Mar 8, 2011
Kind
B2
Abstract

The present invention relates to a method for preparing an industrial asphalt comprising (1) heating an asphalt flux to a temperature which is within the range of about 400° F. (204° C.) to 550° F. (288° C.) to produce a hot asphalt flux, (2) sparging an oxygen containing gas through the hot asphalt flux for a period of time which is sufficient to increase the softening point of the asphalt flux to a value of at least 100° F. (38° C.), to produce an underblown asphalt composition; and (3) mixing a sufficient amount of a polyphosphoric acid throughout the underblown asphalt composition while the underblown asphalt composition is maintained at a temperature which is within the range of 200° F. (93° C.) to 550° F. (288° C.) to attain a softening point which is within the range of 185° F. (85° C.) to 250° F. (121° C.) and a penetration value of at least 15 dmm at 77° F. (25° C.) to produce the industrial asphalt.

Claims (19)

1. A method for preparing an industrial asphalt from a hard asphalt flux comprising (1) heating the hard asphalt flux to a temperature which is within the range of about 400° F. to 550° F. to produce a hot asphalt flux, (2) sparging an oxygen containing gas through the hot asphalt flux for a period of time which is sufficient to increase the softening point of the asphalt flux to a value which is within the range of 100° F. to 175° F., to produce an underblown asphalt composition, and (3) mixing a sufficient amount of a polyphosphoric acid throughout the underblown asphalt composition while the underblown asphalt composition is maintained at a temperature which is within the range of 200° F. to 550° F. to attain a softening point which is within the range of 185° F. to 250° F. and a penetration value of at least 15 dmm to produce the industrial asphalt.

2. A method as specified in claim 1 , wherein the industrial asphalt has a softening point which is within the range of 185° F. to 235° F., and wherein the industrial asphalt has a penetration value which is within the range of 15 drum to 35 dmm.

3. A method as specified in claim 1 , wherein the industrial asphalt has a softening point which is within the range of 190° F. to 220° F., and wherein the industrial asphalt has a penetration value which is within the range of 15 dmm to 25 dmm.

4. A method as specified in claim 1 wherein the mixing in step (3) is fulfilled by mechanical agitation.

5. A method as specified in claim 1 wherein the mixing in step (3) is fulfilled by bubbling an inert gas through the hot polyphosphoric acid modified underblown asphalt composition.

6. A method as specified in claim 1 wherein the amount of polyphosphoric acid added to the hot asphalt flux in step (3) is within the range of 0.1 weight percent to 10 weight percent.

7. A method as specified in claim 1 wherein the polyphosphoric acid has a H 3 P0 4 equivalent concentration which is within the range of about 115% to about 117%.

8. A method as specified in claim 1 wherein the polyphosphoric acid has a H 3 P0 4 equivalent concentration of about 105%.

9. A method as specified in claim 1 wherein the oxygen containing gas is air.

10. A method as specified in claim 1 wherein the oxygen containing gas is sparged through the hot asphalt flux in step (2) which is maintained within the range of about 400° F. to 550° F. for a period of time which is within the range of 30 minutes to 8 hours.

11. A method as specified in claim 1 wherein the polyphosphoric acid modified underblown asphalt composition is maintained in step (3) at a temperature which is within the range of 200° F. to 550° F. and is mixed for a period of time which is within the range of about 10 minutes to about 4 hours.

12. A method as specified in claim 1 wherein the oxygen containing gas is sparged through the hot polyphosphoric acid modified asphalt flux in the presence of an air blowing catalyst.

13. A method as specified in claim 1 wherein the polyphosphoric acid modified underblown asphalt composition is maintained in step (3) at a temperature which is within the range of 200° F. to 550° F. for a period of time which is within the range of about 10 minutes to about 4 hours with an inert gas blanket.

14. A method as specified in claim 9 wherein the air is enriched with oxygen.

15. A method as specified in claim 9 wherein the air is enriched with chlorine.

16. A method as specified in claim 1 wherein the oxygen containing gas is oxygen.

17. A method as specified in claim 1 wherein the hot asphalt flux is void of phosphorus pentoxide.

18. A method as specified in claim 17 wherein the polyphosphoric acid is of the structural formula:

wherein n represents an integer from 0 to about 10.

Assignments (7)
SECURITY INTEREST Recorded Sep 23, 2021
From: BMIC LLC; ELKCORP; ELK COMPOSITE BUILDING PRODUCTS, INC.; ELK PREMIUM BUILDING PRODUCTS, INC.; HBP ACQUISITION LLC; GAF ENERGY LLC; SIPLAST, INC.; SPECIALTY GRANULES INVESTMENTS LLC
To: DEUTSCHE BANK AG NEW YORK BRANCH
Reel/Frame 057572/0607 →
CHANGE OF NAME Recorded Aug 24, 2021
From: BUILDING MATERIALS INVESTMENT CORPORATION
To: BMIC LLC
Reel/Frame 057292/0184 →
RELEASE OF SECURITY INTEREST Recorded Nov 5, 2011
From: DEUTSCHE BANK TRUST COMPANY AMERICAS, AS COLLATERAL AGENT
To: BUILDING MATERIALS CORPORATION OF AMERICA; BMCA ACQUISITION INC.; BMCA ACQUISITION SUB INC.; BMCA FRESNO LLC; BMCA FRESNO II LLC; BMCA GAINESVILLE LLC; BMCA INSULATION PRODUCTS INC.; BMCA QUAKERTOWN INC.; BUILDING MATERIALS INVESTMENT CORPORATION; BUILDING MATERIALS MANUFACTURING CORPORATION; DUCTWORK MANUFACTURING CORPORATION; GAF LEATHERBACK CORP.; GAF MATERIALS CORPORATION (CANADA); GAF PREMIUM PRODUCTS INC.; GAF REAL PROPERTIES, INC.; GAFTECH CORPORATION; HBP ACQUISITION LLC; LL BUILDING PRODUCTS INC.; PEQUANNOCK VALLEY CLAIM SERVICE COMPANY, INC.; SOUTH PONCA REALTY CORP.; WIND GAP REAL PROPERTY ACQUISITION CORP.
Reel/Frame 027180/0331 →
RELEASE OF SECURITY INTEREST Recorded Nov 5, 2011
From: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
To: BUILDING MATERIALS CORPORATION OF AMERICA; BMCA ACQUISITION INC.; BMCA ACQUISITION SUB INC.; BMCA FRESNO LLC; BMCA FRESNO II LLC; BMCA GAINESVILLE LLC; BMCA INSULATION PRODUCTS INC.; BMCA QUAKERTOWN INC.; BUILDING MATERIALS INVESTMENT CORPORATION; BUILDING MATERIALS MANUFACTURING CORPORATION; DUCTWORK MANUFACTURING CORPORATION; GAF LEATHERBACK CORP.; GAF MATERIALS CORPORATION (CANADA); GAF PREMIUM PRODUCTS INC.; GAF REAL PROPERTIES, INC.; GAFTECH CORPORATION; HBP ACQUISITION LLC; LL BUILDING PRODUCTS INC.; PEQUANNOCK VALLEY CLAIM SERVICE COMPANY, INC.; SOUTH PONCA REALTY CORP.; WIND GAP REAL PROPERTY ACQUISITION CORP.
Reel/Frame 027180/0368 →
SECURITY AGREEMENT Recorded Apr 5, 2007
From: BUILDING MATERIALS CORPORATION OF AMERICA; BMCA ACQUISITION INC.; BMCA ACQUISITION SUB INC.; BMCA FRESNO LLC; BMCA FRESNO II LLC; BMCA GAINESVILLE LLC; BMCA INSULATION PRODUCTS INC.; BMCA QUAKERTOWN INC.; BUILDING MATERIALS INVESTMENT CORPORATION; BUILDING MATERIALS MANUFACTURING CORPORATION; DUCTWORK MANUFACTURING CORPORATION; GAF LEATHERBACK CORP.; GAF MATERIALS CORPORATION (CANADA); GAF PREMIUM PRODUCTS INC.; GAF REAL PROPERTIES, INC.; GAFTECH CORPORATION; HBP ACQUISITION LLC; LL BUILDING PRODUCTS INC.; PEQUANNOCK VALLEY CLAIM SERVICE COMPANY, INC.; SOUTH PONCA REALTY CORP.; WIND GAP REAL PROPERTY ACQUISITION CORP.
To: DEUTSCHE BANK AG NEW YORK BRANCH
Reel/Frame 019122/0197 →
SECURITY AGREEMENT Recorded Mar 19, 2007
From: BUILDING MATERIALS CORPORATION OF AMERICA; BMCA ACQUISITION INC.; BMCA ACQUISITION SUB INC.; BMCA FRESNO LLC; BMCA FRESNO II LLC; BMCA GAINESVILLE LLC; BMCA INSULATION PRODUCTS INC.; BMCA QUAKERTOWN INC.; BUILDING MATERIALS INVESTMENT CORPORATION; BUILDING MATERIALS MANUFACTURING CORPORATION; DUCTWORK MANUFACTURING CORPORATION; GAF LEATHERBACK CORP.; GAF MATERIALS CORPORATION (CANADA); GAF PREMIUM PRODUCTS INC.; GAF REAL PROPERTIES, INC.; GAFTECH CORPORATION; HBP ACQUISITION LLC; LL BUILDING PRODUCTS INC.; PEQUANNOCK VALLEY CLAIM SERVICE COMPANY, INC.; SOUTH PONCA REALTY CORP.; WIND GAP REAL PROPERTY ACQUISITION CORP.
To: DEUTSCHE BANK TRUST COMPANY AMERICAS
Reel/Frame 019028/0534 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 1, 2006
From: RUAN, YONGHONG; LONGCOR, WILLIAM K., IV; JOHNSON, PETER LARS
To: BUILDING MATERIALS INVESTMENT CORPORATION
Reel/Frame 017538/0078 →