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Polyethylene modified asphalt agglomerate and its making process

A technology of polyethylene modification and polyethylene, which is applied in the direction of building components, building insulation materials, construction, etc., can solve the problems of reducing the effect of asphalt modification, the performance of modified asphalt, poor dispersion and compatibility, poor adhesion, etc. , to achieve the effect of lowering the embrittlement temperature, short process and low cost

Inactive Publication Date: 2004-01-21
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high crystallinity, high rigidity and easy aging of polypropylene, the dispersion and compatibility with asphalt are poor, especially the adhesion with stone is poor, which reduces the modification effect of asphalt and the performance of modified asphalt. At the same time, the use of twin-screw extruder is mainly a kind of physical blending, which cannot fundamentally solve the problems of strength, weather resistance, storage stability and construction convenience of modified asphalt, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: The components of the polyethylene modified asphalt masterbatch of the present invention are as follows in parts by weight

[0008] PE 85

[0009] Asphalt (YH801) 15

[0010] Graft modification (long-chain alkyl maleic anhydride) 1.0

[0011] Chemical initiator (DCP) 0.2

[0012] Crosslinking agent (di4-nitrobenzene disulfide) 2.5

[0013] Compatibilizer (stearic acid) 1.5

[0014] Light stabilizer (TBS) 0.8

[0015] Antioxidant (di-tert-butylphenol) 0.5

[0016] Anti-stripping agent (calcium stearate) 2.0

[0017] The PE and additives are mixed uniformly in the mixer, and the asphalt is melted, and the vacuum degree of the second-stage twin-screw extruder and the temperature of each zone are controlled according to the above requirements. First, the mixture of polymer and additives is added to the first stage of the second-stage twin-screw extruder. When the material passes through the third zone, the initiator is continuously added, and the graft is continuousl...

Embodiment 2

[0018] Example 2: The components of the polyethylene modified asphalt masterbatch of the present invention are as follows in parts by weight

[0019] High polymer (PE: 100 parts, SBS: 20 parts) 60

[0020] Asphalt (YH792) 30

[0021] Graft modification (maleic anhydride) 2.5

[0022] Chemical initiator (BPO) 1.0

[0023] Crosslinking agent (sulfur powder) 2.0

[0024] Compatibilizer (maleic acid diester) 2.5

[0025] Light stabilizer (UV-531) 0.1

[0026] Antioxidant (Antioxidant H) 2.0

[0027] Anti-stripping agent (talcum powder) 4.0

[0028] The high polymer and the auxiliary agent are mixed uniformly in the mixer, and the asphalt is melted, and the vacuum degree of the second-stage twin-screw extruder and the temperature of each zone are controlled according to the above requirements. First, the mixture of polymer and additives is added to the first stage of the second-stage twin-screw extruder. When the material passes through the third zone, the initiator is continuously add...

Embodiment 3

[0029] Example 3: The components of the polyethylene modified asphalt masterbatch of the present invention are as follows in parts by weight:

[0030] High polymer (PE: 100 parts, APAO: 10 parts) 75

[0031] Asphalt (D4463) 25

[0032] Graft modification (octadecenoic acid) 2.0

[0033] Chemical initiator (DBP) 0.5

[0034] Crosslinking agent (methylthiuram disulfide) 1.0

[0035] Compatibilizer (n-butyl stearate) 3.5

[0036] Light stabilizer (UV-9) 0.5

[0037]Antioxidant (246) 1.0

[0038] Anti-stripping agent (DTA) 3.0

[0039] The high polymer and the auxiliary agent are mixed uniformly in the mixer, and the asphalt is melted, and the vacuum degree of the second-stage twin-screw extruder and the temperature of each zone are controlled according to the above requirements. First, the mixture of polymer and additives is added to the first stage head of the second-stage twin-screw extruder. When the material passes through the third zone, the initiator is continuously added, an...

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Abstract

The present invention is polyethylene modified asphalt agglomerate and its making process. The material includes the components of polymer 50-85 wt%, asphalt 10-35 wt%, grafting modifier 0.5-3.0 wt%, chemical initiator 0.1-1.0 wt%, crosslinking agent 1.0-3.0 wt%, compatibilizer 1.0-4.0 wt% and assistant 0.1-8.0 wt%. The preparation process includes mixing the polymer and the assistant inside a mixer, heating to melt asphalt, and adding all the components into a double-screw extruder to prepare modified asphalt agglomerate. The modified asphalt agglomerate has high elasticity restoring rate, high strength, high weather resistance, simple preparation process, and low production cost.

Description

Technical field [0001] The invention relates to a modified asphalt masterbatch and a preparation method thereof, in particular to a polyethylene modified asphalt masterbatch and a preparation method thereof. Background technique [0002] The development of high-grade roads and the rapid increase in traffic volume require that the road surface should not be rutted and pushed at high temperatures, and cracked and loosened under low temperature and rain erosion. However, ordinary asphalt has the disadvantages of low strength, high temperature sensitivity, high temperature flow, low temperature brittleness, rutting and non-fatigue resistance, etc., so it cannot meet the requirements of high-grade highways. In order to overcome the above shortcomings, asphalt modification has been paid more attention. At present, the modification of asphalt is mainly to add certain high-molecular polymers, such as SBS, PE, EVA, SBR, etc., to uniformly disperse the high polymer in the asphalt through s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/40C08J3/12C08L23/00C08L23/06C08L95/00
Inventor 陈庆郭林陈斌
Owner CHENDU NEW KELI CHEM SCI CO LTD
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