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Novel CO2 hardened phenolic resin binder and preparation method thereof

A technology of phenolic resin and resole phenolic resin, which is applied in the field of new CO2 hardening phenolic resin binder and preparation, can solve the problems of low normal temperature strength of sand cores, increased core-making cost, etc., and achieves obvious effect of improving initial strength and production cost. Low, good transparency

Inactive Publication Date: 2016-11-30
轩重建筑节能科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main problem of the phenolic resin cold box method is that the normal temperature strength of the sand core is low. In order to improve the normal temperature strength of the sand core, the amount of resin added has to be increased, which leads to an increase in the cost of core making.

Method used

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  • Novel CO2 hardened phenolic resin binder and preparation method thereof
  • Novel CO2 hardened phenolic resin binder and preparation method thereof
  • Novel CO2 hardened phenolic resin binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A new type of CO 2 The hardened phenolic resin binder includes the following components: 45% of the resol resin body, 25% of the crosslinking agent, 20% of the dispersant, and 0.5% of the coupling agent.

[0025] Preferably, the crosslinking agent is water glass.

[0026] Preferably, the dispersant is sodium hydroxide.

[0027] Preferably, the coupling agent is silane.

[0028] In order to solve the above problems, the present invention also provides a novel CO 2 The preparation method of hardened phenolic resin binder, the concrete steps are:

[0029] (1) Modification and preparation of resol resin body: directly add formaldehyde, melt phenol into a liquid state, put 1mol quantitatively into a three-necked bottle, then add 2mol formaldehyde, quantitatively add catalyst KOH 0.2mol, and slowly heat up to 90°C , hold for 1 hour, then add acrylic acid, and then hold the reaction at 85°C for a certain time, the viscosity is controlled at 35s, and the reaction time is fl...

Embodiment 2

[0036] A new type of CO 2 The hardened phenolic resin binder includes the following components: 49% of the resol resin body, 28% of the crosslinking agent, 22% of the dispersant, and 1.0% of the coupling agent.

[0037] Preferably, the crosslinking agent is water glass.

[0038] Preferably, the dispersant is sodium hydroxide.

[0039] Preferably, the coupling agent is silane.

[0040] In order to solve the above problems, the present invention also provides a novel CO 2 The preparation method of hardened phenolic resin binder, the concrete steps are:

[0041] (1) Modified preparation of resol resin body: adopt the method of direct addition of formaldehyde, that is, melt phenol into a liquid state, put 1mol quantitatively into a three-necked bottle, then add 2mol formaldehyde, quantitatively add catalyst KOH 0.2mol, and slowly heat up to 90 ° C , hold for 1 hour, then add acrylic acid, and then hold the reaction at 85°C for a certain time, the viscosity is controlled at 35s...

Embodiment 3

[0048] A new type of CO 2 The hardened phenolic resin binder includes the following components: 55% of resol resin body, 30% of crosslinking agent, 25% of dispersant, and 1.5% of coupling agent.

[0049] Preferably, the crosslinking agent is water glass.

[0050] Preferably, the dispersant is sodium hydroxide.

[0051] Preferably, the coupling agent is silane.

[0052] In order to solve the above problems, the present invention also provides a novel CO 2 The preparation method of hardened phenolic resin binder, the concrete steps are:

[0053] (1) Modification and preparation of resol resin body: directly add formaldehyde, melt phenol into a liquid state, put 1mol quantitatively into a three-necked bottle, then add 2mol formaldehyde, quantitatively add catalyst KOH 0.2mol, and slowly heat up to 90°C , hold for 1 hour, then add acrylic acid, and then hold the reaction at 85°C for a certain time, the viscosity is controlled at 35s, and the reaction time is flexibly controlled ...

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Abstract

The invention discloses a novel CO 2 Hardened phenolic resin binder, including the following components: resole phenolic resin body 45~55%, crosslinking agent 25~30%, dispersant 20~25%, coupling agent 0.5~1.5%. The invention also discloses a novel CO 2 The preparation method of the hardening phenolic resin binder, first prepares the resole phenolic resin body, and then mixes the prepared resole phenolic resin body with a crosslinking agent, a dispersant, and a coupling agent to prepare a new type of CO 2 Hardened phenolic resin binder. The invention has excellent process performance and low production cost, and can meet the requirement of mass core making in modern green foundry production.

Description

technical field [0001] The invention relates to a resin binder, in particular to a novel CO2 hardening phenolic resin binder and a preparation method. Background technique [0002] Casting plays an important role in the machinery industry, and the prevention and control of pollution in the casting production process is becoming more and more urgent. In casting production, traditional cold box processes such as triethylamine method, SO 2 The method uses toxic and harmful gases to the human body and the environment as a catalyst or curing agent, which is not conducive to environmental protection. Therefore, it is of great significance to develop new casting bonding materials and processes that are non-toxic to the human body and harmless to the environment. [0003] With the increasing requirements of human beings for environmental protection, foundry workers began to work on the non-toxic gas hardening resin sand molding core making process and successfully used it in produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K3/24C08K3/22C08K5/54C08G8/30B22C1/16
CPCC08K3/24B22C1/167C08G8/30C08K3/22C08K5/54C08L2201/10C08L2312/00C08L61/14
Inventor 夏学云
Owner 轩重建筑节能科技(上海)有限公司
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