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Two-component polyurethane adhesive for grinding tool and preparation method of two-component polyurethane adhesive

A two-component polyurethane and adhesive technology, applied in the field of polyurethane applications, can solve the problems of abrasive shedding, easy foaming, moisture sensitivity, etc., and achieve the effect of smooth abrasive surface, long service life and good adhesion

Active Publication Date: 2017-05-17
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the grinding process, the abrasive tools made of ordinary polyurethane adhesives are obviously softened when they are in high-pressure contact with the high-speed rotating workpiece surface, resulting in high temperature, which leads to premature shedding of the abrasive, and the adhesive adheres to the workpiece surface, resulting in stains and affecting The gloss of the surface of the processed workpiece is reduced, and the polyurethane material is sensitive to moisture, and it is easy to foam after adding a large amount of filler, which also affects the smoothness of the surface of the ground material.

Method used

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  • Two-component polyurethane adhesive for grinding tool and preparation method of two-component polyurethane adhesive
  • Two-component polyurethane adhesive for grinding tool and preparation method of two-component polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Polymer components: 15% polyether polyol (PPG300) with a functionality of 3 and a molecular weight of 300, 4% of a polyether polyol (PPG430) with a functionality of 4 and a molecular weight of 300, 80% of BMY, and 1% of a water absorbent, in proportion well mixed.

[0029] Isocyanate component: PM-200 80% and MDI-50 20%, mix evenly in proportion.

[0030] During the production, the temperature of the polymer component and the prepolymer component is controlled at 25-35°C, mixed according to the mass ratio of 100:60, stirred evenly and degassed, poured into the prepared mold, and cured at room temperature The time is 10 minutes, demould after 40 minutes, vulcanized at 100°C for 5-8 hours or placed at room temperature for 1 week to obtain a high-hardness polyurethane resin of Shore D80. The measured hardness is Shore D58 at 80°C. The weight loss of the wheel is 7.4g, and the product has no air bubbles. , The grinding surface is dry and non-sticky.

Embodiment 2

[0032] Polymer components: 20% of polyether polyol (PPG500) with a functionality of 3 and a molecular weight of 500, 3% of a polyether polyol (PPG430) with a functionality of 4 and a molecular weight of 300, BMY 76%, and 1% of a water absorbent, in proportion well mixed.

[0033] Isocyanate component: PM-200 100%.

[0034] Control the temperature of the polymer component and the prepolymer component at 25-35°C, mix according to the ratio of 100:60, stir evenly and defoam, pour into the mold that has already been prepared, and the curing time at room temperature is 14 minutes After 45 minutes, the product was demoulded, and the product was vulcanized at 100°C for 5 hours or placed at room temperature for 1 week to obtain a polyurethane resin with a high hardness of Shore D81. The measured hardness was Shore D62 at 80°C. The weight loss of the wheel was 7.2g. slime.

Embodiment 3

[0036] Polymer components: 10% polyether polyol (PPG300) with a functionality of 3 and a molecular weight of 300, 28% of a polyether polyol (PPG600) with a functionality of 4 and a molecular weight of 600, BMY 50.95%, DOTP 10%, bismuth zinc zirconium Composite catalyst 0.05%, water absorbing agent 1%, mix uniformly in proportion.

[0037] Isocyanate component: PM-200 80% and liquefied MDI 20%, mix evenly in proportion.

[0038] Control the temperature of the polymer component and the prepolymer component at 25-35°C, mix according to the ratio of 100:60, stir evenly and defoam, pour into the mold that has already been prepared, and the curing time at room temperature is 10 minutes , demould after 50 minutes, the product is vulcanized at 100°C for 5-8 hours or placed at room temperature for 1 week to obtain a polyurethane resin with a high hardness of D83 at 80°C and a hardness of D58 at 80°C. The weight loss of the wheel is 7.0g. Dries tack-free.

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Abstract

The invention belongs to the technical field of polyurethane application, and in particular relates to a two-component polyurethane adhesive for a grinding tool and a preparation method of the two-component polyurethane adhesive. The two-component polyurethane adhesive adopts a two-component system; a polymer is prepared from polyether polyol of a functionality degree of 4 or 3, castor oil, a catalyst and a water absorbing agent in a mixed manner; an isocyanate component is prepared from 0-20% of diphenyl methane diisocyanate and 80-100% of polyisocyanates; and the two components are mixed together, thereby the polyurethane adhesive of high shore hardness D75-85 can be prepared. The two-component polyurethane adhesive is mainly applied to production and manufacturing of a polyurethane grinding material, is environmental-friendly in product, easy to operate, high in adhesiveness to minerals, smooth in grinding material surface, long in service life and economic and applicable.

Description

technical field [0001] The invention belongs to the technical field of polyurethane application, and in particular relates to a two-component polyurethane adhesive for abrasive tools and a preparation method thereof. Background technique [0002] Abrasives are known as industrial teeth. Abrasives or grinding tools are often used as grinding tools in grinding to machine parts to be processed to meet certain technical requirements. Grinding material is referred to as abrasive for short, that is, a grinding material with a certain hardness and a certain grinding ability that can be used for grinding purposes. Abrasives are divided into two categories: natural and artificial. Natural abrasives are abrasives made from natural mineral mining and processing. Artificial abrasives are artificially processed abrasives with related mineral materials and binders. Artificial abrasives have developed at least dozens of types since the first artificial abrasives invented by people, and ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/67C08G18/66C08G18/48C08G18/32B24D3/28
CPCB24D3/28C08G18/3206C08G18/36C08G18/6674C08G18/6696C08G18/7671
Inventor 张芳陈海良孙志强王维龙
Owner SHANDONG INOV POLYURETHANE
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