Polyvinyl alcohol-polyurethane elastic buffing wheel and preparation method thereof

A polyurethane elasticity and polyvinyl alcohol technology, applied in the field of polishing grinding wheels, can solve the problems of large differences in finished product density and cell structure, difficult to control the ratio of abrasive and binder, difficult to control the degree of acetalization, etc., and achieve uniform cell size. , uniform and beautiful grinding surface, reducing the effect of a lot of falling off

Inactive Publication Date: 2013-11-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, although polyvinyl acetal elastic polishing wheels are widely used, their performance is not ideal, and their applications are limited. They also have the following disadvantages: 1) aldehydes are toxic and highly volatile, and the production and production It is unsafe to use, endangers health and seriously pollutes the environment; 2) The ratio of abrasive to binder is difficult to control, if the ratio is too large, the bond is not strong, and it is easy to fall off; if the ratio is too small, the slurry is difficult to mix, and even coagulation and precipitation may occur; 3) The density and cell structure of the finished product are quite different; 4) The degree of acetalization is difficult to control, and the acetalization time is long; 5) The brittleness is relatively large; 6) It is difficult to modify and apply to other fields

Method used

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  • Polyvinyl alcohol-polyurethane elastic buffing wheel and preparation method thereof
  • Polyvinyl alcohol-polyurethane elastic buffing wheel and preparation method thereof
  • Polyvinyl alcohol-polyurethane elastic buffing wheel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of polyvinyl alcohol-polyurethane elastic polishing emery wheel, comprises the steps:

[0032] (1) Add 5g of polyvinyl alcohol of model 1799 provided by Shanghai Sinopharm Group Chemical Reagent Co., Ltd. and 25g of distilled water into the reactor, and use a stirrer under the condition of 400r / min in a water bath at 95-100°C The solution was dissolved for 20 minutes to obtain an aqueous solution of polyvinyl alcohol.

[0033] (2) Take the above polyvinyl alcohol aqueous solution, add 6g of abrasive silicon carbide with a particle size of 200 mesh, and use a disperser to stir evenly at a speed of 300r / min.

[0034] (3) Add 10g of water-based polyurethane prepolymer dropwise to the suspension obtained in step (2), the model is Bayhydur3100, and then add dropwise 0.8g of the catalyst stannous octoate, mix evenly in a water bath at 30°C, and stir in a mixer at a speed of 400r / min under stirring, react for 5min.

[0035] (4) Curing the colloi...

Embodiment 2

[0044] A kind of preparation method of polyvinyl alcohol-polyurethane elastic polishing emery wheel, comprises the steps:

[0045] (1) Add 2g of polyvinyl alcohol of model 1788 provided by Shanghai Sinopharm Chemical Reagent Co., Ltd., 3g of polyvinyl alcohol of model 1799 provided by Shanghai Sinopharm Chemical Reagent Co., Ltd., and 37.5g of distilled water into the reactor. In a water bath at ~60°C, a stirrer was used to dissolve for 30 minutes under the condition of a rotating speed of 600 r / min to obtain an aqueous solution of polyvinyl alcohol.

[0046] (2) Take the above polyvinyl alcohol aqueous solution, add 3g of silicon carbide, 5g of aluminum oxide and 5g of magnesium oxide with a particle size of 1800 mesh, and use a disperser to stir evenly at a speed of 450r / min.

[0047] (3) Add 5g of Bayhydur2655 and 5g of Bayhydur401-7 water-based polyurethane prepolymer dropwise to the suspension obtained in step (2), then add 0.4g of catalyst stannous octoate and 0.4g of tr...

Embodiment 3

[0052] A kind of preparation method of polyvinyl alcohol-polyurethane elastic polishing emery wheel, comprises the steps:

[0053] (1) The 1g model provided by Shanghai Sinopharm Chemical Reagent Co., Ltd. is 1799, the 2g model provided by Shanghai Sinopharm Chemical Reagent Co., Ltd. is 1788, and the 2g model provided by Shanghai Sinopharm Chemical Reagent Co., Ltd. is BF-17 The polyvinyl alcohol and 5 g of distilled water were added into the reactor, and dissolved in a stirrer at 500 r / min for 25 min in a water bath at 90° C. to obtain an aqueous solution of polyvinyl alcohol.

[0054] (2) Take the above polyvinyl alcohol aqueous solution, add 1g of white corundum, 1g of zirconia corundum, 3g of black corundum, 5g of silicon carbide and 5g of alumina with a particle size of 600 mesh, and use a disperser to stir evenly at a speed of 600r / min .

[0055] (3) Add 5gBayhydurT0607, 5gBayhydurN3390, 5gBayhydur2547, 5gBayhydur3100, 5gBayerBayhydrol BL5140 water-based polyurethane p...

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PUM

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Abstract

The invention discloses a polyvinyl alcohol-polyurethane elastic buffing wheel and a preparation method of the polyvinyl alcohol-polyurethane elastic buffing wheel. The preparation method comprises the steps that firstly, polyvinyl alcohol is mixed with distilled water, and the mixture is dissolved for 20-30 minutes under the condition of 50-95 DEG C water bath and at the rotation speed of 400-600r/min to obtain a polyvinyl alcohol aqueous solution; then, the polyvinyl alcohol aqueous solution is heated up to 30-100 DEG C, grinding materials are firstly added into the polyvinyl alcohol aqueous solution, after the mixture of the grinding materials and the polyvinyl alcohol aqueous solution is stirred and mixed evenly at the rotation speed of 400-600r/min, polyurethane pre-polymers, catalysts and air hole generating agents are added, and all the components are stirred and mixed evenly at the rotation speed of 400-600r/min and react for 5-10min; solidification is conducted for 2-4h under the condition of 30-100 DEG C, and then the buffing wheel which is good in elasticity, good in water resistance, good in heat-dissipating performance and high in mechanical strength is obtained. The elastic buffing wheel is even in foam hole, good in abrasion resistance and grinding force, not prone to deforming or curling in humid environment and applicable to long-time grinding work.

Description

technical field [0001] The invention relates to a polishing grinding wheel, in particular to a polyvinyl alcohol-polyurethane elastic polishing grinding wheel and a preparation method thereof; the elastic polishing grinding wheel has high cross-linking density, good elasticity, good water resistance, excellent heat dissipation performance, and mechanical strength high feature. technical background [0002] Polishing technology is an emerging technology and a complex frontier subject, belonging to the field of grinding and polishing technology. Polishing grinding wheel integrates grinding and polishing, has excellent grinding and polishing performance, and is widely used in various fields such as aviation, machinery, automobile, shipbuilding, metallurgy, chemical industry, construction, furniture, decoration and daily necessities. [0003] The preparation method of the traditional polishing wheel is usually a dry preparation process, that is, mixing abrasives, binders, wetti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D18/00B24D3/28
Inventor 蔡智奇罗志波
Owner SOUTH CHINA UNIV OF TECH
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