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Injection type bar planting adhesive and preparation method thereof

A reinforced rubber and injection technology, applied in the field of reinforced rubber, can solve the problems affecting the durability, uniformity and compactness of epoxy resin reinforced rubber, and prone to brittle failure, so as to reduce the local brittle fracture, The effect of promoting uniform distribution and improving water aging resistance

Active Publication Date: 2022-04-12
深圳市凯龙建筑加固技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Epoxy resin planting glue has excellent mechanical properties and adhesive properties, but the epoxy resin is brittle after curing, and it is prone to brittle failure when subjected to high-strength loads. Therefore, it needs to be strengthened and toughened during use. After adding a large amount of modified components, the uniformity and compactness of the epoxy resin cured product will be destroyed, which will affect the durability of epoxy planting glue and reduce the service life

Method used

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  • Injection type bar planting adhesive and preparation method thereof
  • Injection type bar planting adhesive and preparation method thereof
  • Injection type bar planting adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0050] Weigh 5kg diethylenetriamine, 13kg diethylene glycol methyl ether, 6kg bisphenol A type liquid epoxy resin and 12kg epoxy butyl oleate, add 5kg diethylenetriamine to 8kg diethylene glycol methyl ether In the process, heat to 65°C while stirring, keep stirring at constant temperature, and dropwise add bisphenol A liquid epoxy resin to the mixture, control the dropping rate at 20g / min, continue for 5h, and continue to react for 1h after the dropwise addition is completed , to obtain a diethylenetriamine-epoxy resin prepolymer, add 5kg diethylene glycol methyl ether to the prepolymer, control the temperature at 60°C, continue to add epoxy butyl oleate dropwise, and control the rate of addition to 50g / min, continue for 4h, after the dropwise addition is completed, continue to react for 30min, after the reaction is completed, the product is distilled and passivated to obtain a flexible curing agent. Repeat the above steps several times to prepare for use.

preparation example 2

[0052] Take 10kg of nano-calcium carbonate and add it to 20L of absolute ethanol, stir, and ultrasonically disperse for 30 minutes to obtain a uniform suspension. Add 1.5kg of titanate coupling agent to the suspension, mix ultrasonically for 10 minutes, raise the temperature to 60°C, and react at a constant temperature 6h, the reaction solution is separated by a high-speed centrifuge, the speed of the centrifuge is controlled at 8000r / min, and the separated product is vacuum-dried and ground to obtain the modified nano-calcium carbonate. Repeat the above steps to prepare multiple times to meet the usage.

preparation example 3

[0054] Weigh 5kgKH-550 type silane coupling agent, 0.8kg graphene, and 0.4kg dicyclohexylcarbodiimide respectively, add graphene and dicyclohexylcarbodiimide to the silane coupling agent, ultrasonically disperse for 1h, and increase Temperature to 75°C, heat preservation reaction for 12 hours, after cooling, centrifuge, wash, and vacuum-dry to obtain modified graphene; repeat the above steps to prepare multiple times to meet the use.

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Abstract

The invention relates to the technical field of embedded steel bar adhesives, and particularly discloses an injection type embedded steel bar adhesive and a preparation method thereof. The invention relates to an injection type bar planting adhesive, which comprises a component A and a component B, the mass ratio of the component A to the component B is 3: 1, and the component A comprises 50-70 parts of matrix resin; 20-40 parts of a modified filler; 4-6 parts of a thixotropic agent; 3-5 parts of a diluent; 2-4 parts of a coupling agent; the component B comprises the following components in parts by weight: 50-60 parts of a flexible curing agent; 20-30 parts of a modified filler; 6-8 parts of an accelerant; 1-3 parts of a diluent; 3-5 parts of a thixotropic agent; 2-4 parts of a coupling agent; the matrix resin comprises novolac epoxy resin and bisphenol A type epoxy vinyl resin in a mass ratio of (1-2): (4-5). The preparation method comprises the steps of preparation of the component A, preparation of the component B and preparation of the injection type steel bar planting adhesive, the injection type steel bar planting adhesive has good damp-heat aging resistance, and the service life of the steel bar planting adhesive is prolonged.

Description

technical field [0001] The application relates to the technical field of rebar-planting glue, and specifically discloses an injection-type rebar-planting glue and a preparation method thereof. Background technique [0002] With the rapid growth of the total volume of buildings in our country, some old buildings in use have experienced different degrees of performance degradation, and the old buildings have potential safety hazards. Therefore, these old buildings need to be repaired and reinforced. In order to alleviate the problems of population, resources and environment. In the reconstruction of old buildings, planting bar connection is recognized as an efficient connection method. Among them, the chemical planting bar fixes the steel bar or the base material through the planting bar glue, which not only has a reinforcing effect on the building structure itself, but also does not cause damage to the base material due to its own expansion. It can not only strengthen and tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C09J163/04C09J183/07C09J11/04C09J11/00C08G59/50
Inventor 张伟张慧
Owner 深圳市凯龙建筑加固技术有限公司