Process for the preparation of an asphalt mix composition

Patent metadata

Field	Value
Publication number	US-2022340757-A1
Application number	US-202017760796-A
Country	US
Kind code	A1
Filing date	Sep 17, 2020
Priority date	Sep 18, 2019
Publication date	Oct 27, 2022
Grant date	—

Abstract

The present invention relates to a process for the preparation of an asphalt mix composition, said process comprising: (1) providing an asphalt composition and heating said composition to a temperature in the range of from 110 to 200° C.; (2) providing a granular material and heating said material to a temperature in the range of from 110 to 240° C.; (3) providing one or more thermosetting reactive compounds; (4) adding the one or more thermosetting reactive compounds provided in (3) to the asphalt composition obtained in (1) and homogenizing the mixture for a duration in the range of from 2 to 180 s; (5) adding the mixture obtained in (4) to the granular material obtained in (2) and homogenizing the slurry for a duration in the range of from 5 to 180 s. Further, the present invention relates to an asphalt mix composition obtained or obtainable by said process and its use.

First claim

1 .- 15 . (canceled)

16 . A process for the preparation of an asphalt mix composition, said process comprising:
(1) providing an asphalt composition and heating said composition to a temperature in the range of from 110 to 200° C.; (2) providing a granular material and heating said material to a temperature in the range of from 110 to 240° C.; (3) providing one or more thermosetting reactive compounds; (4) adding the one or more thermosetting reactive compounds provided in (3) to the asphalt composition obtained in (1) and homogenizing the mixture for a duration in the range of from 2 to 180 s; (5) adding the mixture obtained in (4) to the granular material obtained in (2) and homogenizing the slurry for a duration in the range of from 5 to 180 s.

17 . The process of claim 16 , wherein after (4) and prior to (5) the mixture obtained in (4) is stored at a temperature in the range of from 60 to 190° C.

18 . The process of claim 16 , wherein after (4) and prior to (5) the mixture obtained in (4) is subject to mixing at a mixing rate of 100 rpm or less.

19 . The process of claim 16 , wherein the mixture obtained in (4) is directly processed in (5).

20 . The process of claim 16 , wherein the one or more thermosetting reactive compounds comprise one or more compounds selected from the group consisting of polyisocyanates, epoxy resins, melamine formaldehyde resins, and mixtures of two or more thereof.

21 . The process of claim 16 , wherein the weight ratio of the total amount of the one or more thermosetting reactive compounds to the asphalt composition is in the range of from 0.1:99.9 to 25:75.

22 . The process of claim 16 , wherein the weight ratio of the mixture obtained in (4) to the granular material obtained in (2) is in the range of from 0.5:99.5 to 25:75.

23 . The process of claim 16 , wherein the granular material provided in (2) comprises one or more granular materials selected from the group consisting of gravel, reclaimed asphalt pavement, sand, one or more filler materials, and mixtures of two or more thereof.

24 . The process of claim 16 , wherein the asphalt composition provided in (1) comprises one or more additives.

25 . The process of claim 16 , wherein the granular material provided in (2) comprises from 5 to 100 weight-% of reclaimed asphalt pavement.

26 . The process of claim 16 , wherein the granular material provided in (2) displays a grain size in the range of from 0.1 to 70 mm.

27 . The process of claim 16 , wherein (4) and/or (5) are conducted under an oxygen containing atmosphere.

28 . The process of claim 16 , wherein (4) and/or (5) are conducted as a batch process or as a continuous process.

29 . An asphalt mix composition obtained or obtainable according to the process of claim 16 .

30 . Use of an asphalt mix composition according to claim 29 for pavement applications.

Assignees

• Basf Se

Inventors

• Schatz Waldemar
• Otero Martinez Iran
• Zeilinger Michael
• Malonson Bernie Lewis
• Wiebelhaus Dag
• Gust Karl R
• Bokern Stefan
• Fleischel Olivier

Classifications

• Y02A30/30

  in transportation, e.g. on roads, waterways or railways · CPC title

• C08L2555/60

  Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye · CPC title

• E01C7/22

  Binder incorporated in hot state, e.g. heated bitumen · CPC title

• E01C7/262

  with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork (E01C7/265 takes precedence) · CPC title

• C08L2555/22

  Asphalt produced above 140°C, e.g. hot melt asphalt · CPC title