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A kind of instant low-segregation high-viscosity high-elasticity modifier and its preparation method and application

A technology of segregation and modifier, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor storage stability of asphalt mixture, easy phase separation, and poor elasticity index, etc., and achieve excellent storage stability , Reduce surface interfacial tension, high elastic storage stability

Active Publication Date: 2022-04-15
山东高速四川产业发展有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to disperse SBS when preparing the modifier, it must be dispersed through colloid mills for more than 2 hours at a high temperature above 190°C; the storage stability of the asphalt mixture prepared by the above method is extremely poor, and phase separation and rubber formation are prone to occur during transportation. Blocking and other problems, segregation is difficult to meet the national standard of ≦ 2.5 ℃; and there is a problem that after SBS cross-linking, as the viscosity increases, the elastic index becomes worse

Method used

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  • A kind of instant low-segregation high-viscosity high-elasticity modifier and its preparation method and application
  • A kind of instant low-segregation high-viscosity high-elasticity modifier and its preparation method and application
  • A kind of instant low-segregation high-viscosity high-elasticity modifier and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] An instant low-segregation, high-viscosity, high-elasticity modifier is mainly prepared from the following components in parts by weight: 50 parts of TPEE, 30 parts of PTW, 1 part of monoglyceride, and 19 parts of PBAT. The melt index of TPEE is 10-50g / 10min when tested at 2.16kg and 240°C, the Shore A hardness is 50-75 degrees, and the glass transition temperature Tg is 20-30°C; the melt index of PTW is 2.16kg, 190 Under the condition of ℃, the test value is 10~14g / 10min, the melting point is 72℃, the glass transition temperature Tg is -55℃, the tensile strength is 750psi, the Shore A hardness is 73 degrees, and the elongation at break is 950%; monoglyceride Obtained by direct esterification of stearic acid and glycerin, the purity of the crude product is >90% after molecular distillation purification.

[0030] The preparation method of the instant low-resolution high-viscosity high-elasticity modifier is as follows:

[0031] Step 1, 50 parts of TPEE resin and 30 part...

Embodiment 2

[0035] An instant low-resolution, high-viscosity, high-elasticity modifier, mainly prepared from the following components by weight: 65 parts of TPEE, 15 parts of PTW, 1 part of monoglyceride, and 19 parts of PBAT. The same TPEE, PTW, monoglyceride, PBAT as in Example 1 were used.

[0036] The modifier preparation method is as follows:

[0037] Step 1, 65 parts of TPEE resin and 15 parts of PTW were mixed in a high-speed mixer for 60 minutes at a speed of 500 rpm to obtain material 1;

[0038] Step 2: Add 19 parts of PBAT to the high-speed mixer in material 1 and mix evenly at a speed of 500 rpm for 60 minutes to obtain material 2;

[0039] Step 3. Add the material 2 in step 2 from the main feed port and 1 part of monoglyceride from the side feed port to the parallel twin-screw extruder for granulation. The granulation temperature is 220°C, the screw speed is 300rpm, and water cooling is adopted. Cut into pellets, and dry the obtained pellets at 80°C for 8 hours to obtain an...

Embodiment 3

[0041] An instant low-resolution high-viscosity high-elasticity modifier, mainly prepared from the following components by weight: 80 parts of TPEE, 12.5 parts of PTW, 2.5 parts of monoglyceride, and 5 parts of PBAT. The same TPEE, PTW, monoglyceride, PBAT as in Example 1 were used.

[0042] The modifier preparation method is as follows:

[0043] Step 1, 80 parts of TPEE resin and 12.5 parts of PTW were mixed in a high-speed mixer for 60 minutes at a speed of 500 rpm to obtain material 1;

[0044] Step 2: Add 5 parts of PBAT to the high-speed mixer in material 1 and mix evenly at a speed of 500 rpm for 60 minutes to obtain material 2;

[0045] Step 3: Add material 2 in step 2 from the main feed port and 2.5 parts of monoglyceride from the side feed port to the parallel twin-screw extruder for granulation. The granulation temperature is 220°C, the screw speed is 300rpm, and water cooling is used Cut into pellets, and dry the obtained pellets at 80°C for 8 hours to obtain an i...

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Abstract

The invention discloses an instant low-segregation high-viscosity high-elasticity modifier, which is mainly prepared from the following components in parts by weight: 50-80 parts of TPEE, 12.5-30 parts of PTW, and 1-2.5 parts of monoglyceride , PBAT 5-19 parts, the invention also discloses a preparation method and application of an instant low-resolution high-viscosity high-elasticity modifier. The TPEE selected in the present invention has good viscoelasticity, and the dispersion of PBAT and PTW is good. In addition, monoglyceride is used as a lubricant. The material forms an instant low-segregation, high-viscosity, high-elasticity modifier. When the asphalt modifier is added to the asphalt, it can be fully mixed with the asphalt and has better dispersibility, which not only makes the modified asphalt have good It is viscous and elastic, and can also improve the flooding and rutting of the road surface.

Description

technical field [0001] The invention relates to the field of asphalt modification, in particular to an instant low-separation high-viscosity and high-elasticity modifier and a preparation method and application thereof. Background technique [0002] With the development of my country's transportation industry, road construction is advancing by leaps and bounds. Most roads use asphalt pavement, because asphalt pavement has the advantages of smooth surface, no joints, comfortable driving, wear resistance, low noise, short construction period and quick maintenance. The application is more and more extensive. However, with the rapid development of social economy, the traffic load increases, asphalt is easy to age, and there are often problems such as pan axis, rutting, and low temperature cracking. Therefore, higher requirements are put forward for the use of asphalt pavement. Ordinary asphalt It can no longer meet the requirements of road surface use, and asphalt must be treate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08L23/08C08L67/02C08K5/103C08L95/00
CPCC08L67/00C08L95/00C08L2205/02C08L2205/03C08L2205/035C08L23/0884C08L67/02C08K5/103
Inventor 孔存芝姚明穆明浩周智奇邢金雪冯伟张哲陈秀秀王盼耿立涛胡佩清刘新强张朝陈思国郑君杨茂君
Owner 山东高速四川产业发展有限公司