Unlock instant, AI-driven research and patent intelligence for your innovation.

Block copolymer modified asphalt emulsion and preparation method thereof

A technology of block copolymer and asphalt emulsion, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of poor emulsification effect and low solid content, and achieve increased solid content, good emulsification effect, and stability enhanced effect

Active Publication Date: 2018-01-23
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of poor emulsification effect and low solid content in the prior art, the present invention provides an asphalt emulsion that is easy to emulsify and has high solid content

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Block copolymer modified asphalt emulsion and preparation method thereof
  • Block copolymer modified asphalt emulsion and preparation method thereof
  • Block copolymer modified asphalt emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Under the protection of nitrogen in a clean and dry 150ml two-hole horn bottle, add 2.5g of dimethylamine to the other hole of the horn bottle with a syringe at room temperature 10°C, and then add 112.2ml of 0.5mol / L n-butyllithium After shaking for 20 minutes, the reaction was complete, and the concentration of lithium dimethylamide was 0.48mol / L at this time.

Embodiment 2

[0076] Under the protection of nitrogen in a clean and dry 150ml two-hole horn bottle, add 5.1g of diisopropylamine to the other hole of the horn bottle with a syringe at a room temperature of 32°C, and then add 0.5mol / L n-butyllithium 103ml, the reaction was complete after shaking for 25min, and the concentration of lithium diisopropylamide was 0.47mol / L at this time.

Embodiment 3

[0078] Under the protection of nitrogen, add 3.5L of hexane-cyclohexane mixed solvent and 54g of styrene (S) into a 5-liter polymerization kettle, start stirring and add the 0.48mol / L di Lithium methylamide 6ml, react at 30-85°C for 25min, then add 252g of butadiene (B) and polymerize for 25-30min, then add 54g of styrene and react for 25min, then add 0.29g of maleic anhydride 10ml of tetrahydrofuran solution is used for capping reaction, the temperature of the capping reaction is 40-65°C, the reaction time is 20min, and then 1.5g of 2,6-di-tert-butyl p-cresol and 6ml of 0.5mol / L dilute hydrochloric acid sol are added to the discharge. and 100ml deionized water, and stirred at room temperature for 15min. After the final synthesized SBS glue solution is coagulated with water vapor to remove the solvent and then dried, the number average molecular weight of the product is 16×10 4 , the combined active carboxyl content is 0.032wt%, and the 1,2-structure content is 42.3%, wherein...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a block copolymer modified asphalt emulsion. The block copolymer modified asphalt emulsion comprises block copolymer as shown in formula 1, wherein P is block copolymer with the general formula being A1-B-A2, A1 and A2 are styrene blocks, B is a butadiene block, the weight ratio (S / B) of the styrene blocks (S) to the butadiene block (B) is 20 / 80-40 / 60, the mass percentage of the 1, 2 structure in the butadiene block is 25-50%, and the molecular weight of P is 80000-200000. In addition, the invention further discloses a preparation method of the asphalt emulsion. The asphalt emulsion containing the block copolymer as shown in the formula 1 has the advantages that the solid content of the asphalt emulsion is increased, the stability of the asphalt emulsion is enhanced, and production efficiency is increased; the storage stability of the asphalt emulsion is increased as compared with that of known asphalt emulsions, and the asphalt emulsion is good in emulsifying effect.

Description

technical field [0001] The invention belongs to the field of asphalt emulsion technology, and in particular relates to an asphalt emulsion modified by a block copolymer. Background technique [0002] Bitumen is used in road paving, roof waterproofing and coating materials. However, pure asphalt has some deficiencies in physical properties. Therefore, it needs to be improved. Previously, diene polymer rubbers (such as styrene-butadiene rubber) and styrene-rubber block copolymers (such as styrene-butadiene-styrene and styrene-isoprene-styrene Block copolymers) are added to asphalt to improve the thermal and mechanical properties of asphalt. However, these polymer-modified asphalts generally require high-temperature heating and melting. The disadvantages are that they are not energy-saving, and that they will release harmful gases at high temperatures and pollute the environment. Therefore, people tend to use emulsified asphalt more and more. Emulsified asphalt is a road c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08F297/04C08F4/48C08F8/00
Inventor 梁红文李望明刘先珍袁煜艳贺卉昌蒋文英黄丽芳
Owner CHINA PETROLEUM & CHEM CORP