Novolak phenolic resin microspheres and preparation method thereof

A phenolic resin and microsphere technology is applied in the field of chemical synthetic resin microspheres and its preparation, and achieves the effects of improving high temperature wear resistance, difficult to control molecular weight and high temperature
CN102585435AInactive Publication Date: 2012-07-18重庆阁林环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
重庆阁林环保科技有限公司
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to novolak phenolic resin microspheres and a preparation method thereof, and belongs to the field of chemical synthesis. The microspheres consist of the following components in part by weight: 80 to 100 parts of absolute ethanol, 95 to 105 parts of phenol, 100 to 115 parts of formaldehyde, 6 to 12 parts of triethylenetetramine, 2 to 6 parts of boric acid and 1 to 1.75 parts of polyvinylpyrrolidone. The method comprises the following steps of: sequentially feeding the reactants with heating, reacting for a certain period of time, cooling, discharging, precipitating, performing centrifugal separation, and drying. The novolak phenolic resin microspheres prepared by the method have high dispersibility, have the particle size of 5 to 50mu m, are easily mixed with other aids uniformly, have the thermal decomposition temperature of more than 450 DEG C after being cured, and have high toughness, moisture absorption property and strength; and the preparation process is short, easy to operate and low in cost, and products can be used for an organic friction material, a molding compound, a grinding wheel bonding material, a thermal insulation material, a fireproof material and the like, so the microspheres can replace the traditional phenolic resin.
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Description

technical field

[0001] The invention relates to a chemical synthetic resin microsphere and a preparation method thereof, in particular to a Novolak phenolic resin microsphere and a preparation method thereof. Background technique

[0002] Abrasive belts are coated abrasives, also known as flexible abrasives. Compared with solid abrasive wheels, they have the advantages of flexibility, safety, higher precision and lower grinding costs during polishing. Abrasive belt grinding can process workpieces of various shapes with higher surface quality and precision requirements. In addition, abrasive belt grinding can not only process workpieces with flat, inner and outer circular surfaces, but also efficiently process surface quality and precision requirements. Tall large or odd-shaped pieces.

[0003] Abrasive belt is mainly composed of substrate, abrasive and binder, and binder is a bridge connecting abrasive and substrate, and is a special substance that firmly adheres abrasive t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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