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Method for preparing polymer modified asphalt

A technology of modified asphalt and polymers, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of difficult equipment processing, large-scale production of equipment, and modified asphalt that cannot meet the demand, so as to achieve excellent natural Cleaning effect, good shearing effect, excellent dispersing and distributive mixing ability

Active Publication Date: 2009-12-23
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the equipment of this invention is difficult to process, and the equipment is difficult to produce on a large scale, which cannot meet the growing demand for the production of modified asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Component Weight Fraction

[0021] No. 90 Asphalt A 100.00

[0022] SBS YH801 4.00

[0023] Zinc oxide 0.05

[0024] Elemental sulfur 0.6

[0025] Preparation method:

[0026] Turn on the intermeshing co-rotating twin-screw extruder with an aspect ratio of 36, set the temperatures in zones 1, 2, 3, and 4 at 120°C, 150°C, 150°C, and 170°C, and adjust the speed to 20 rpm .

[0027] When heating 100.00 parts of No. 90 pitch to 120°C, add 4 parts of SBS YH801, 0.05 parts of zinc oxide, and 0.6 parts of elemental sulfur, and stir for 5 minutes. Add it to the feed port of an intermeshed co-rotating twin-screw extruder, and carry out extrusion reaction for 30 minutes to obtain SBS modified asphalt.

[0028] The softening point of the obtained modified asphalt is 82°C; at 25°C, the penetration is 53.5dmm; the ductility (5°C, 5cm / min, cm) is 28; the segregated softening point difference is 1.0°C, less than 2.0°C.

[0029] At the same time, the colloid mill was used to pro...

Embodiment 2

[0032] Component Weight Fraction

[0033] No. 70 Asphalt B 100.00

[0034] SBS4303 5.00

[0035] Zinc oxide 0.08

[0036] Elemental sulfur 0.9

[0037] Preparation method:

[0038] Turn on the intermeshing co-rotating twin-screw extruder with an aspect ratio of 36, set the temperatures in zones 1, 2, 3, and 4 at 120°C, 170°C, 170°C, and 210°C, and adjust the speed to 15 rpm .

[0039] When heating 100.00 parts of No. 70 pitch B to 120°C, add 5 parts of SBS 4303, 0.08 parts of zinc oxide, and 0.9 parts of elemental sulfur, and stir for 5 minutes. Add it to the feed port of an intermeshed co-rotating twin-screw extruder, and carry out extrusion reaction for 40 minutes to obtain SBS modified asphalt.

[0040] The softening point of the obtained modified asphalt is 92°C; at 25°C, the penetration is 52.1dmm; the ductility (5°C, 5cm / min, cm) is 35; the segregated softening point difference is 1.4°C, less than 2.0°C.

[0041] At the same time, use the colloid mill to process t...

Embodiment 3

[0044] Component Weight Fraction

[0045] No. 90 Asphalt C 100.00

[0046] SBS4303 3.00

[0047]LDPE 6.00

[0048] Zinc oxide 0.04

[0049] Elemental sulfur 0.5

[0050] Preparation method:

[0051] Turn on the intermeshing co-rotating twin-screw extruder with an aspect ratio of 36, set the temperatures in zones 1, 2, 3, and 4 to 100°C, 140°C, 160°C, and 180°C, and adjust the speed to 20 rpm .

[0052] When heating 100.00 parts of Zhonghai 361 No. 90 bitumen C to 120°C, add 3 parts of SBS 4303, 6 parts of LDPE, 0.04 parts of zinc oxide, 0.5 parts of elemental sulfur, and stir for 12 minutes. Add it to the feed port of an intermeshed co-rotating twin-screw extruder, and carry out extrusion reaction for 60 minutes to obtain SBS modified asphalt.

[0053] The softening point of the obtained modified asphalt is 72°C; at 25°C, the penetration is 61.8dmm; the ductility (5°C, 5cm / min, cm) is 21; the segregated softening point difference is 1.8°C, less than 2.0°C.

[0054] At ...

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Abstract

The invention discloses a method for preparing polymer modified asphalt. The method for preparing polymer-modified asphalt provided by the present invention is to mix molten matrix asphalt and polymer modifier to form a uniformly molten polymer-modified asphalt system, and then add it to a twin-screw extruder, Perform extrusion reaction in the extruder to obtain polymer modified asphalt; among them, the temperature range of the first zone of the twin-screw extruder is 90-190°C, the temperature range of the second zone is 100-250°C, and the temperature range of the third zone is 120-220°C ℃, the temperature range of four zones is 120-220℃. The production process of the invention is simple and convenient to operate, the production time is short, a production cycle is 0.5-1 hour, and the intermediate control process is reduced to realize continuous industrial production.

Description

technical field [0001] The invention relates to a method for preparing polymer modified asphalt. Background technique [0002] At present, the production method of polymer-modified asphalt is mainly colloid mill and high-speed shearing machine for high-speed shear processing of polymer and matrix asphalt. In order to ensure the effect of high refinement and uniform dispersion of polymer, it is required to The base asphalt reciprocates and passes through the above-mentioned device for many times, so the production time is long, the equipment wears heavily, and the production cost is high. It is therefore important to develop new methods for producing modified asphalt. [0003] Chinese patent CN93241750.7 introduces a kind of equipment that replaces the colloid mill for processing and preparing modified asphalt by means of stirring, which relies on a special design of high-speed rotation in a cylindrical container that adds high molecular polymer particles to the asphalt The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00B29C47/40B29C47/92C08L53/02C08L23/06C08L23/12B29C48/405B29C48/41B29C48/92
CPCB29C47/92B29C48/92B29C2948/92704B29C48/04B29C48/625B29C48/9185B29C2948/9259B29C2948/92885B29C2948/92895B29C48/405B29C48/41
Inventor 张玉贞李军刘延军于守全
Owner CHINA NAT OFFSHORE OIL CORP
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