Preparation method of polyurethane sieve plate

A technology of polyurethane and sieve plate, applied in the field of polyurethane sieve plate, can solve the problems of poor strength and wear resistance, poor adaptability, easy hydrolysis and other problems, and achieve the effect of improving hydrolysis resistance, improving wear resistance and improving water resistance

Inactive Publication Date: 2018-02-16
安徽屹翔滤材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the ordinary polyester polyurethane sieve plate in China has high tensile strength and good wear resistance, but it has poor adaptability to the hot and humid mine environment, and it generates a lo

Method used

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  • Preparation method of polyurethane sieve plate

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Effect test

Embodiment 1

[0020] A preparation method of polyurethane sieve plate, comprising the following steps:

[0021] (1) Preparation of prepolymer: uniformly mix polycaprolactone polyol, polytetrahydrofuran, silicon deposition modified nano-alumina, coupling agent, sodium dodecylbenzene sulfonate, add to the reaction kettle, heat To 80°C, stir at 2500r / min for 40min, then raise the temperature of the reactor to 112°C, adjust the pressure inside the reactor to 0.04MPa, keep the temperature and pressure and stir for 1.5h, then pass helium into the reactor to remove the air , then add diphenylmethane diisocyanate, adjust the temperature to 102°C, and react for 2.5h to obtain a modified polyurethane prepolymer; the mass ratio of polycaprolactone polyol to polytetrahydrofuran is 1:5.1; The amount of silicon deposition modified nano-alumina added is 20% of the quality of polytetrahydrofuran; the quality of the coupling agent is 0.15% of the quality of silicon deposition modified nano-alumina; the qual...

Embodiment 2

[0034] A preparation method of polyurethane sieve plate, comprising the following steps:

[0035] (1) Preparation of prepolymer: uniformly mix polycaprolactone polyol, polytetrahydrofuran, silicon deposition modified nano-alumina, coupling agent, sodium dodecylbenzene sulfonate, add to the reaction kettle, heat To 90°C, stir at 2500r / min for 40min, then raise the temperature of the reactor to 115°C, adjust the pressure inside the reactor to 0.06MPa, keep the temperature and pressure and stir for 1.5h, then pass helium into the reactor to remove the air , then add diphenylmethane diisocyanate, adjust the temperature to 102°C, and react for 2.5h to obtain a modified polyurethane prepolymer; the mass ratio of polycaprolactone polyol to polytetrahydrofuran is 1: 5.5; The amount of silicon deposition modified nano-alumina added is 20% of the quality of polytetrahydrofuran; the quality of the coupling agent is 0.15% of the quality of silicon deposition modified nano-alumina; the qua...

Embodiment 3

[0048] A preparation method of polyurethane sieve plate, comprising the following steps:

[0049] (1) Preparation of prepolymer: uniformly mix polycaprolactone polyol, polytetrahydrofuran, silicon deposition modified nano-alumina, coupling agent, sodium dodecylbenzene sulfonate, add to the reaction kettle, heat To 85°C, stir at 2500r / min for 40min, then raise the temperature of the reactor to 113°C, adjust the pressure inside the reactor to 0.05MPa, keep the temperature and pressure and stir for 1.5h, then pass helium into the reactor to remove the air , then add diphenylmethane diisocyanate, adjust the temperature to 102°C, and react for 2.5h to obtain a modified polyurethane prepolymer; the mass ratio of polycaprolactone polyol to polytetrahydrofuran is 1:5.3; The amount of silicon deposition modified nano-alumina added is 20% of the quality of polytetrahydrofuran; the quality of the coupling agent is 0.15% of the quality of silicon deposition modified nano-alumina; the qual...

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Abstract

The invention discloses a preparation method of a polyurethane sieve plate, and relates to the technical field of polyurethane sieve plate. The preparation method comprises the following steps: (1) preparation of prepolymer, (2) mixing, (3) pouring, (4) pre-curing and demolding, and (5) post curing. Polyester and polyether polyol are used as raw materials, hydrolysis resistance stability of the polyurethane sieve plate is improved by an ether-linkage-containing diamines chain extender, the polyurethane prepolymer is prepared from polyester and polyether blended polyol, and thus, the hydrolysispossibility is reduced while the strength of polyurethane elastomer is improved; the ether-linkage-containing diamines chain extender is used; and aryl with steric effect is introduced in the ether-linkage-containing chain extender, the flexibility of ether linkage is reduced so that the ether linkage is rigid, and the hydrolysis resistance stability of the polyurethane sieve plate is improved while various physical properties and mechanical properties of the elastomer are ensured.

Description

technical field [0001] The invention belongs to the technical field of polyurethane sieve plates, and in particular relates to a preparation method of polyurethane sieve plates. Background technique [0002] Due to the excellent wear resistance, oil resistance, hydrolysis resistance and aging resistance of polyurethane elastomer, the sieve plate prepared with it can not only greatly reduce the weight of equipment, reduce equipment cost, prolong service life, but also reduce noise. It is widely used in mines, Vibrating screen washing and classifying operations in metallurgy, coke, coal washing, petroleum, chemical and other industries. However, at present, the ordinary polyester polyurethane sieve plate in China has high tensile strength and good wear resistance, but it has poor adaptability to the hot and humid mine environment, and it generates a lot of internal heat during high-speed vibration and is easy to hydrolyze; while polyether polyurethane sieve plate It has good ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/12C08G18/40C08G18/48C08G18/42C08G18/32C08K9/06C08K9/04C08K3/22
CPCC08G18/12C08G18/4018C08G18/4277C08G18/4854C08G18/6618C08K3/22C08K9/04C08K9/06C08K2003/2227C08K2201/011C08G18/3243
Inventor 丁好奇韩同清李金成王体亚
Owner 安徽屹翔滤材有限公司
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