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Novel water-soluble phenolic resin and preparation method thereof

A water-soluble phenolic resin, phenolic resin technology, applied in the direction of adhesive types, aldehyde/ketone condensation polymer adhesives, adhesives, etc., can solve the problem that rubber adhesives cannot fully meet the performance of motor vehicle clutch friction plates requirements, affecting the safety of motor vehicles, reducing friction coefficient, etc., to achieve good production prospects and market application prospects, easy mass production, and low production costs.

Active Publication Date: 2010-07-14
浙江科马摩擦材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the three thermal problems of "thermal decay, thermal expansion, and thermal cracks" in the rubber binder used in clutch friction materials, the rubber binder cannot fully meet the performance requirements of clutch friction plates for motor vehicles, and the use of rubber The motor vehicle clutch friction plate made of adhesive also has problems such as short service life. At the same time, as the use time increases, the friction performance of the clutch friction plate will change, the friction coefficient will decrease, and slipping will easily occur, which will affect the performance of the motor vehicle. driving safety

Method used

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  • Novel water-soluble phenolic resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0012] The water-soluble phenolic resin of the present invention is made of phenol and formaldehyde as main raw materials, and sodium hydroxide as a catalyst, and is prepared through condensation reaction under strict production process conditions.

[0013] The production technology of water-soluble phenolic resin of the present invention is:

[0014] (1) Check the measuring tools and production equipment used in resin production, and then inspect the ingredients of various raw materials, accurately weigh 100 parts by weight of phenol and 105 to 115 parts by weight of formaldehyde as raw materials, put them into the resin reaction container, and then 0.1 to 0.2 parts by weight of the basic catalyst are put in, and heating and stirring are started.

[0015] (2) When the material heating temperature reaches 85°C, stop heating and continue stirring, and stop stirring when the material temperature reaches 95°C.

[0016] (3) Note that when the temperature reaches 98°C, the materia...

Embodiment 2

[0028] The water-soluble phenolic resin prepared according to the technical scheme of Example 1 of the present invention can be mixed with water, and has the characteristics of water samples, so it is called water-soluble phenolic resin. It is quite different from general phenolic resin in its mixing properties with water. Because the general liquid phenolic resin is alcohol-soluble, it can only use alcohols, such as alcohol or methanol, as the most commonly used solvent, or dissolve it in alcohol first, and then add a little water. Therefore, phenolic resin is also called alcohol-soluble phenolic resin, and it cannot simply use water as a solvent. This is also one of the main differences between the water-soluble phenolic resin of the present invention and common phenolic resins.

Embodiment 3

[0030] The water-based resin prepared according to the technical solution of Example 1 of the present invention has the characteristics of good stability. Store the resin under natural conditions. After the room temperature does not exceed 50°C, and it is stored at room temperature for 500 hours, the water-based resin has no change or dehydration phenomenon, which shows that the stability of the resin can meet the production requirements.

[0031] After testing, the water-soluble phenolic resin of the present invention can be placed under natural conditions for up to 725 hours, and it is found that turbidity begins to appear, and stratification occurs in 783 hours, resulting in dehydration.

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Abstract

The invention provides novel water-soluble phenolic resin, which is prepared through using 100 weight parts of phenol and 105 to 115 weight parts of formaldehyde as raw materials to carry out condensation reaction under the effect of 0.1 to 0.2 weight part of basic catalysts. The content of solid materials obtained after drying the water-soluble phenolic resin accounts for 50 to 55 percent of the weight of the original phenolic resin. The invention also provides a production method of the novel water-soluble phenolic resin. The invention uses common phenol and formaldehyde as raw materials to carry out the condensation reaction under certain production process conditions for preparing the water-soluble phenolic resin. The resin has good soaking performance, can be mixed with water, has the watery features, and also has good adhesive performance, and in addition, the production cost is low. The water-soluble phenolic resin has high stability, and can not generate the dehydration phenomenon after being stored for 500 hours at the normal temperature. The production process in the invention is simple, producers can conveniently realize the large-scale production, and the invention has good production prospects and market application prospects.

Description

technical field [0001] The invention relates to a novel water-soluble phenolic resin and a preparation method thereof. Background technique [0002] At present, the known clutch friction plates for motor vehicles are usually made of synthetic rubber, natural rubber or generally modified phenolic resin as a binder, and then various rubber compounds and other materials are used as filling materials, and gasoline or solvent oil is used as the filling material. The solvent is made through a series of processes such as glue making, dipping, winding, and hot pressing. However, due to the three thermal problems of "thermal recession, thermal expansion, and thermal cracks" in the rubber binder used in clutch friction materials, the rubber binder cannot fully meet the performance requirements of clutch friction plates for motor vehicles, and the use of rubber The motor vehicle clutch friction plate made of adhesive also has problems such as short service life. At the same time, as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10C09J161/10
Inventor 王宗和司万宝程慧玲徐发健
Owner 浙江科马摩擦材料股份有限公司
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