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Preparation method of modified cross-linked bisphenol A reinforcement adhesive for ballastless track mortar defect repair

A ballastless track and adhesive technology, applied in the direction of adhesives, adhesive additives, epoxy resin glue, etc., can solve the problems that cannot meet the construction requirements, poor fluidity, small shrinkage and bond strength, etc., and achieve the edge sealing process Strong operability, reduced economic loss, and good anti-aging performance

Active Publication Date: 2012-06-27
ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acrylic repair materials have outstanding advantages in terms of low viscosity, impermeability and corrosion resistance, but there are problems of low strength and poor fluidity in the early stage of curing; patents CN201110117338.1 and CN201010146754.X use acrylate emulsions to improve repair sulfur Aluminate cement mortar prepares rapid repair mortar, its 2h, 1d compressive strength and viscosity strength are only low, and fluidity is poor; In patent CN200910057208, CN201010102862 and CN200510041693, polyurethane resin repair material has long curing time and high viscosity, The shortcomings of large shrinkage deformation, high elasticity, and insufficient mechanical strength make it difficult to meet the requirements of repair materials for ballastless track defect and block removal technology
[0004] The epoxy resin repair materials disclosed by CN02132751.3 and CN03113923.X have the characteristics of compression resistance after curing, high tensile strength, small shrinkage rate and high bond strength, but there are slow curing reaction speeds and required curing temperature High disadvantages, unable to meet the construction requirements of railway operating lines to quickly repair damaged parts at room temperature within the skylight time

Method used

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  • Preparation method of modified cross-linked bisphenol A reinforcement adhesive for ballastless track mortar defect repair
  • Preparation method of modified cross-linked bisphenol A reinforcement adhesive for ballastless track mortar defect repair
  • Preparation method of modified cross-linked bisphenol A reinforcement adhesive for ballastless track mortar defect repair

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Effect test

Embodiment 1

[0019] Example 1: A method for preparing a modified cross-linked bisphenol A reinforcing adhesive for repairing defects in ballastless track mortar, including:

[0020] (1) Preparation of bisphenol A epoxy resin main agent: Add 100 parts of bisphenol A and 20 parts of 1,6-hexanediol diglycidyl ether into the reaction vessel, stir and dissolve at 40°C for 2.0h, and wait for stirring After completion, add 20 parts of heavy calcium carbonate to prepare a viscosity of 8000mPa·S bisphenol A epoxy resin main agent;

[0021] (2) Synthesis of polythiol-polyamide composite modified curing agent: 25 parts of 2-2'-dimercaptoethyl sulfide, 25 parts of trimethylolpropane triacrylate and 0.2 part of triethylamine Place in a reaction vessel, pass through nitrogen protection, stir and react at 70°C for 8 hours to obtain a colorless and transparent polythiol modifier with a multi-branched structure, then add 250 parts of polyamide curing agent, and stir evenly

[0022] .After 1.5h of heat pre...

Embodiment 2

[0024] Example 2: A method for preparing a modified cross-linked bisphenol A reinforcing adhesive for repairing defects in ballastless track mortar, including:

[0025] (1) Preparation of bisphenol A epoxy resin main agent: Add 100 parts of bisphenol A and 20 parts of 1,4-butanediol diglycidyl ether into the reaction vessel, stir and dissolve at 40°C for 2.0 hours, and wait until the stirring is completed After adding 20 parts of aluminum hydroxide, the prepared viscosity is 8200mPa·S bisphenol A epoxy resin main agent;

[0026] (2) Synthesis of polythiol-polyamide composite modified curing agent: 20 parts of 2-2'-dimercaptoethyl sulfide, 20 parts of trimethylolpropane triacrylate and 0.2 part of triethylamine Place in a reaction vessel, pass through nitrogen protection, stir and react at 70°C for 8 hours to obtain a colorless and transparent polythiol modifier with a multi-branched structure, then add 200 parts of polyamide curing agent, and stir evenly

[0027] .After 1.5 h...

Embodiment 3

[0029] Example 3: A method for preparing a modified cross-linked bisphenol A reinforcing adhesive for repairing defects in ballastless track mortar, including:

[0030] (1) Preparation of bisphenol A epoxy resin main agent: Add 100 parts of bisphenol A and 20 parts of 1,4-butanediol diglycidyl ether into the reaction vessel, stir and dissolve at 40°C for 2.0 hours, and wait until the stirring is completed Then add 20 parts of heavy calcium carbonate and 10 parts of gas phase SiO 2 , to prepare a viscosity of 9000mPa·S bisphenol A epoxy resin main agent;

[0031] (2) Synthesis of polythiol-polyamide composite modified curing agent: 20 parts of 2-2'-dimercaptoethyl sulfide, 20 parts of trimethylolpropane triacrylate and 0.2 part of triethylamine Place in a reaction vessel, pass through nitrogen protection, stir and react at 70°C for 8 hours to obtain a colorless and transparent polythiol modifier with a multi-branched structure, then add 200 parts of polyamide curing agent, and...

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Abstract

The invention discloses a preparation method of a modified cross-linked bisphenol A reinforcement adhesive for ballastless track mortar defect repair. The preparation method provided by the invention comprises the following steps of preparing a bisphenol A epoxy resin as a main agent, synthesizing a polymercaptan-polyamide composite modification and curing agent and curing the bisphenol A epoxy resin by the polymercaptan-polyamide composite modification and curing agent. The modified cross-linked bisphenol A reinforcement adhesive for ballastless track mortar defect repair has appropriate viscosity, can be cured fast at a room temperature, and has a low shrinkage ratio, good flowing thixotropy, high interface bonding strength, strong construction operationality and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing a modified cross-linked bisphenol A reinforcing adhesive used for repairing defects in ballastless track mortar. The prepared rapid repair agent can be widely used in high-speed railway ballastless track CRTS I and CRTS II missing block repair. Background technique [0002] High-speed railway construction is a complex system engineering. Due to various effects such as poor construction, train dynamic load, rain and snow erosion, and ambient temperature, ballastless tracks will inevitably produce such as concrete interface damage, CA mortar erosion by water, separation Seams and cracks and other diseases. The damage to the ballastless track filling layer will seriously affect the normal use of the track. If it is not repaired in time, under the action of various deterioration factors, the cracks and separation joints will continue to ...

Claims

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Application Information

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IPC IPC(8): C09J163/02C09J11/08C08G75/00
Inventor 宿万王宇峰黄玉华黄海陈钱宝汪志勇
Owner ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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