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Special adhesive for steel lining inner plate of graphite heat exchanger and fiber layer

A technology of graphite heat exchanger and fiber layer, applied in the direction of adhesives, adhesive types, polymer adhesive additives, etc., can solve the problems of poor mechanical properties, easy to crack, low strength, etc., and achieve strong adaptability , Excellent strength and mechanical properties, and strong mechanical properties

Active Publication Date: 2016-11-09
NANTONG STAR GRAPHITE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used rubber lining has the following disadvantages: 1. The material has poor adaptability and is prone to cracks, which in turn affects the performance of the steel lining inner plate; 2. After curing, the strength is low and the mechanical properties are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In this embodiment, the special glue for bonding the steel-lined inner plate of the graphite heat exchanger and the fiber layer is formed by mixing component A and component B in a ratio of 1:1. The preparation method of the special glue for bonding is as follows :

[0016] (1) Put 10kg of phenolic resin into reactor A, stir continuously until the free aldehyde in the phenolic resin is <2%, the free phenol is <4%, the water content is <12%, and the viscosity is 30cp, then heated to 40°C, and then Add 10ml of polymethyl methacrylate to reactor A, and raise the temperature to 60°C within 25 minutes, and keep it warm for 25 minutes;

[0017] (2) After the heat preservation reaction in step (1), add 0.03ml of plastic roughening wetting agent and 0.02ml of epoxy adhesive defoamer to reactor A in sequence, stir well, and then vacuum dehydrate, Stop dehydration when the dehydration amount reaches 65% of the water content, and discharge when the temperature is lowered to 40°C ...

Embodiment 2

[0020] In this embodiment, the special glue for bonding the steel-lined inner plate of the graphite heat exchanger and the fiber layer is formed by mixing component A and component B in a ratio of 1:1. The preparation method of the special glue for bonding is as follows :

[0021] (1) Put 130kg of phenolic resin into reactor A, stir continuously until the free aldehyde in the phenolic resin is <2%, the free phenol is <4%, the water content is <12%, and the viscosity is 30cp, then heated to 40°C, and then Add 130ml of polymethyl methacrylate to reactor A, and raise the temperature to 60°C within 25 minutes, and keep it warm for 25 minutes;

[0022] (2) After the heat preservation reaction in step (1), add 0.39ml of plastic roughening wetting agent and 0.26ml of epoxy adhesive defoamer to reactor A in sequence, stir well, and then vacuum dehydrate, Stop dehydration when the dehydration amount reaches 65% of the water content, and discharge when the temperature is lowered to 40°...

Embodiment 3

[0025] In this embodiment, the special glue for bonding the steel-lined inner plate of the graphite heat exchanger and the fiber layer is formed by mixing component A and component B in a ratio of 1:1. The preparation method of the special glue for bonding is as follows :

[0026] (1) Put 60kg of phenolic resin into reactor A, stir continuously until the free aldehyde in the phenolic resin is <2%, the free phenol is <4%, the water content is <12%, and the viscosity is 30cp, then heated to 40°C, and then Add 60ml of polymethyl methacrylate to reactor A, and raise the temperature to 60°C within 25 minutes, and keep it warm for 25 minutes;

[0027] (2) After the heat preservation reaction in step (1), add 0.18ml of plastic roughening wetting agent and 0.12ml of epoxy adhesive defoamer to reactor A in turn, stir well, and then vacuum dehydrate, Stop dehydration when the dehydration amount reaches 65% of the water content, and discharge when the temperature is lowered to 40°C to o...

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Abstract

The invention relates to a special adhesive for a steel lining inner plate of a graphite heat exchanger and a fiber layer. The special adhesive is prepared by mixing a component A and a component B according to the ratio of 1:1, wherein the component A is prepared from phenolic resin, acrylate copolymer, wetting agent and defoaming agent; in the mass of phenolic resin, 1ml of acrylate copolymer, 0.003ml of wetting agent and 0.002ml of defoaming agent are added into each gram of phenolic resin; the component B is prepared from benzene sulfonyl chloride; in the mass of phenolic resin, 0.25ml of benzene sulfonyl chloride is added into each gram of phenolic resin. The special adhesive has the advantages that the special adhesive is prepared by mixing the component A and the component B according to ratio of 1:1, and the proportional ratio of components is reasonable; the mechanical property of the final mixed adhesive is strong, the tensile strength is more than 27MPa, the tensile elasticity modulus is more than 2.1*10<3->MPa, the elongate rate is more than 1.5%, the bending strength is more than 40MPa, and the crispness is avoided.

Description

technical field [0001] The invention relates to a glue, in particular to a special glue for bonding the steel-lined inner plate of a graphite heat exchanger and a fiber layer. Background technique [0002] In petroleum, chemical, light industry, pharmaceutical, energy and other industrial production, it is often necessary to heat low-temperature fluid or cool high-temperature fluid, vaporize liquid into steam or condense steam into liquid. These processes need to be completed by heat exchangers. Graphite heat exchangers have the advantages of strong corrosion resistance, high thermal conductivity, and high operating temperature. They are widely used in industry, but because their inner plates are made of steel, they are easily damaged. Corrosion, the rubber lining is generally used to bond the fiber sheet to increase the anti-corrosion performance of the steel lining inner plate. The currently used rubber lining has the following disadvantages: 1. The material has poor adap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/06C09J11/06C09J11/08
CPCC09J11/06C09J11/08C09J161/06C08L33/14C08K5/41
Inventor 刘仍礼夏斌孙建军陆俊缪世阳
Owner NANTONG STAR GRAPHITE EQUIP CO LTD
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