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Bridge expansion joint protective glue with shape self-adaptability

An adaptive, expansion joint technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of sealing and protection of bridge expansion joints, unsatisfactory adhesion of steel structures, and poor adaptability and other problems to achieve the effect of avoiding debonding in winter, avoiding rubber drumming in summer, and excellent elasticity

Pending Publication Date: 2022-01-21
CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the existing elastic joint filler has poor shape adaptability, and the adhesion to the steel structure is not ideal, it is easy to debond, and it is difficult to play a role in sealing and protecting bridge expansion joints

Method used

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  • Bridge expansion joint protective glue with shape self-adaptability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step 1, the preparation of polyurethane prepolymer

[0044] 10 parts by mass of polyethylene glycol (Mn=2000) and 10 parts by mass of polyether polyol (Mn=3000) were heated in vacuum to remove water, then added to the reaction kettle, and 5 parts by mass of iso Phorne diisocyanate, 0.5 parts by mass of dibutyltin dilaurate, and 0.5 parts by mass of ethanolamine were reacted at 60 for 1 hour to obtain a polyurethane prepolymer;

[0045] Step 2, the preparation of A component

[0046] An equal blend of 5 parts by mass of dibutyl phthalate, 1 part by mass of BYK070, 7 parts by mass of talcum powder and calcium carbonate powder was added to a vacuum reactor to remove water, and then the prepared 30 Parts by mass of polyurethane prepolymer, 1 part by mass of dibutyltin dilaurate, and 0.5 parts by mass of trimethyl orthoformate are added, mixed in a vacuum environment, sealed and stored to obtain component A;

[0047] Step 3, preparation of curing agent

[0048] Mix and st...

Embodiment 2

[0053] Step 1, the preparation of polyurethane prepolymer

[0054] 50 parts by mass of polyethylene glycol (Mn=2000) and 40 parts by mass of polyether polyol (Mn=3000) were heated in a vacuum to remove water, then added to the reactor, and 20 parts by mass were added under nitrogen protection. Parts of toluene diisocyanate and equal blends of diphenylmethane diisocyanate, 1 mass part of diethanolamine, 1 mass part of stannous octoate, reacted at 70 for 2 hours to obtain a polyurethane prepolymer;

[0055] Step 2, the preparation of A component

[0056] 10 parts by mass of dioctyl phthalate, an equal blend of ethyl acetate, 5 parts by mass of BYK024 and an equal amount of HX-2085, 20 parts by mass of kaolin and silica powder The blend is added to a vacuum reactor to remove water, and then the obtained 60 mass parts of polyurethane prepolymer, 5 mass parts of dibutyltin dilaurate, and 2 mass parts of trimethyl orthoformate are added, and the Mixed under the environment, sealed...

Embodiment 3

[0063] Step 1, the preparation of polyurethane prepolymer

[0064] 45 parts by mass of polyethylene glycol (Mn=4000) and 25 parts by mass of polyether polyol (Mn=5000) were heated in a vacuum to remove water, then added to the reactor, and 15 parts by mass were added under nitrogen protection. 1,6-hexamethylene diisocyanate and 1 mass part of dibutyltin dilaurate and 0.6 mass part of ethanolamine reacted at 80 for 1 hour to obtain a polyurethane prepolymer;

[0065] Step 2, the preparation of A component

[0066] Add 8 parts by mass of ethyl acetate, butyl acetate and an equal blend of butyl acetate, 3 parts by mass of BYK024, 7 parts by mass of talcum powder, and 6 parts by mass of diatomaceous earth into a vacuum reactor for removal. water, and then the obtained 45 parts by mass of polyurethane prepolymer, 3 parts by mass of dibutyltin dilaurate, and 1 part by mass of trimethyl orthoformate were added, mixed in a vacuum environment, sealed and stored to obtain Group A Minu...

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Abstract

The invention relates to a bridge expansion joint protective glue with shape self-adaptability, the bridge expansion joint protective glue is a mixture of a component A and a component B. The component A comprises the following components by mass: 30-60 parts of a polyurethane prepolymer, 5-10 parts of a plasticizer, 1-5 parts of a catalyst, 1-5 parts of a defoaming agent, 0.5-2 parts of a dewatering agent and 7-20 parts of filler. And the component B comprises the following components by mass: 4-10 parts of a curing agent, 1-3 parts of a plasticizer and 0.5-1.5 parts of a thixotropic agent. The isocyanate group in the component A reacts with the amino group in the component B to form a cross-linked structure, so that an elastomer is constructed. In the cross-linked structure, a molecular chain has excellent flexibility, and the elastomer is low in modulus, good in toughness and excellent in deformability. In the cross-linked network, an imine bond formed by the reaction of terephthalaldehyde and polyether amine has reversibility and can be subjected to reversible fracture and recombination, so that the elastic network has shape self-adaptability.

Description

technical field [0001] The invention relates to the technical field of bridge expansion joint protection, in particular to a shape-adaptive bridge expansion joint protection glue. Background technique [0002] Concrete structures will shrink and expand due to temperature changes. Therefore, in the design of bridge structures, expansion joints need to be set at intervals. At present, bridge expansion joints are usually composed of steel structures and elastic waterproof strips, which can not only ensure airtightness, but also be durable and not easily damaged. However, during long-term service, rainwater and wheels will bring a large amount of soil and sand into the expansion joints, which will accumulate over time and form hard fillers, greatly reducing the deformation capacity of the expansion joints. For this reason, the road surface management and maintenance department needs to regularly clean up the expansion joints, which not only consumes a lot of manpower, material ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C09J11/06
CPCC09J175/08C09J11/04C09J11/06C08K2003/265C08K5/12C08K3/34C08K3/26C08K5/02C08K5/101C08K3/346C08K3/36C08K7/26
Inventor 刘汉超叶雨林辉滕新华
Owner CHANGZHOU ARCHITECTUAL RES INST GRP CO LTD
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