Two-component polyurethane binding agent and grinding wheel applying same

A polyurethane binder and two-component technology, used in the field of polyurethane, can solve the problems of high brittleness and easy cracking of grinding wheels, and achieve the effects of strong activity, good product stability and improved toughness.

Inactive Publication Date: 2020-08-14
上海抚佳精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved in the present invention is to overcome the poor toughness of the polyurethane binder in the prior art, which leads to the excessive brittleness of the prepared grinding wheel and the defects of easy cracking, thereby providing a two-component polyurethane binder and its application. grinding wheel

Method used

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  • Two-component polyurethane binding agent and grinding wheel applying same

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Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment relates to a two-component polyurethane binder, which forms the matrix of the grinding wheel after curing in the abrasive tool, wherein the two-component polyurethane binder specifically includes the following raw materials:

[0048] Combination material: 50 kg of polypropylene oxide polyether polyol with a functionality of 2 and a number average molecular weight of 200, 25 kg of a trimethylolpropane polyether polyol with a functionality of 3 and a number average molecular weight of 800, and a functionality of 3 , 25kg of polypropylene oxide polyether polyol with a number average molecular weight of 4800, 3kg of silane coupling agent KH550, 0.03kg of dibutyltin dilaurate, 1kg of 4A molecular sieve;

[0049] Isocyanate: PM200 75kg and liquefied MDI 25kg.

[0050] Two-component polyurethane binders are cured as follows:

[0051] After mixing the combination material and isocyanate in proportion, take 100kg combination material and 50kg isocyanate, mix and...

Embodiment 2

[0053] This embodiment relates to a two-component polyurethane binder, which forms the matrix of the grinding wheel after curing in the abrasive tool, wherein the two-component polyurethane binder specifically includes the following raw materials:

[0054] Combination material: 40kg of polypropylene oxide polyether polyol with a functionality of 2 and a number average molecular weight of 300, 35kg of trimethylolpropane polyether polyol with a functionality of 3 and a number average molecular weight of 800, and a functionality of 3, 25kg of polypropylene oxide polyether polyol with a number average molecular weight of 3000, 3kg of silane coupling agent KH550, 0.03kg of stannous octoate, 1kg of 4A molecular sieve;

[0055] Isocyanate: PM200 75kg and liquefied MDI 25kg.

[0056] Two-component polyurethane binders are cured as follows:

[0057] After mixing the combination material and isocyanate in proportion, take 100kg combination material and 50kg isocyanate, mix and stir eve...

Embodiment 3

[0059] This embodiment relates to a two-component polyurethane binder, which forms the matrix of the grinding wheel after curing in the abrasive tool, wherein the two-component polyurethane binder specifically includes the following raw materials:

[0060] Combination material: 50 kg of polypropylene oxide polyether polyol with a functionality of 2 and a number average molecular weight of 200, 25 kg of a trimethylolpropane polyether polyol with a functionality of 3 and a number average molecular weight of 500, and a functionality of 3, 25kg of polypropylene oxide polyether polyol with a number average molecular weight of 4800, 3kg of silane coupling agent KH550, 0.03kg of bismuth laurate, 1kg of 4A molecular sieve;

[0061] Isocyanate: PM200 100kg.

[0062] Two-component polyurethane binders are cured as follows:

[0063] After mixing the combination material and isocyanate in proportion, take 100kg combination material and 50kg isocyanate, mix and stir evenly, pour it into t...

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Abstract

The invention relates to the field of polyurethane, in particular to a two-component polyurethane binding agent and a grinding wheel applying the same. The two-component polyurethane binding agent comprises a composite material and isocyanate, based on the total mass of the composite material, the composite material comprises the following raw materials: 30%-60% of polyether polyol with functionality of 2, 25%-45% of polyether polyol with functionality of 3, 25%-45% of a chain extender, 0-3% of a silane coupling agent, 0-0.05% of a catalyst and 0.3%-1% of a water absorbent. Based on the totalmass of the isocyanate, the isocyanate is prepared from the following raw materials: 70 to 100 percent of polyisocyanate and 0 to 30 percent of diphenylmethane diisocyanate. Compared with commerciallyavailable products, the two-component polyurethane binding agent has the advantages that by adjusting the types of the polyether polyol and the adding proportion of the raw materials, the use of high-functionality polyol is reduced or avoided, so that the toughness of the two-component polyurethane bonding agent is improved on the premise that other properties meet the requirements.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a two-component polyurethane binder and a grinding wheel using the same. Background technique [0002] Grinding wheel is a kind of porous object composed of abrasive and bonding agent. It is the most widely used type of abrasive tools. It rotates at high speed when used. It can grind the outer circle, inner circle, plane and Coarse grinding, semi-finishing, fine grinding, grooving and cutting of various profiles. [0003] Abrasives, bonds and pores are the three basic components of grinding wheels. With the difference in abrasives, bonds and grinding wheel manufacturing processes, the characteristics of the obtained grinding wheels may vary greatly, thus affecting the accuracy, roughness and production of grinding processes. Efficiency has a greater impact. Therefore, in the process of preparing grinding wheels, the selection of factors such as abrasives, particle size, hardness, bon...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08K5/544C08K5/5435B24D3/28B24D3/34
CPCB24D3/28B24D3/344C08G18/4812C08G18/4825C08G18/4829C08K5/5435C08K5/544
Inventor 张黎明郭彦彬李玉博
Owner 上海抚佳精细化工有限公司
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