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Method for preparing thermosetting boron-containing phenolic resin powder

A boron phenolic resin and thermosetting technology, which is applied in the field of synthetic resin powder preparation, can solve the problems of poor fluidity of phenolic resin, easy bonding and agglomeration of phenolic resin powder, etc., and achieves fast curing speed, excellent storage stability and good fluidity. Effect

Active Publication Date: 2012-05-09
太仓力达莱特精密工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] All the patented technologies of the above disclosed thermosetting phenolic resin powder have the following disadvantages: either the phenolic resin powder is easily agglomerated, or the fluidity of the phenolic resin is very poor under conditions of heating and pressure

Method used

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  • Method for preparing thermosetting boron-containing phenolic resin powder
  • Method for preparing thermosetting boron-containing phenolic resin powder
  • Method for preparing thermosetting boron-containing phenolic resin powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of thermosetting boron phenolic resin: first 100 grams of preheated and molten phenol, 130 grams of formaldehyde (36.5%) are sucked into the reactor by vacuum, then add 1 gram of zinc oxide and 1 gram of zinc acetate, and stir Heat up to boiling, keep warm for 2 hours, then add 18 grams of boric acid, keep the temperature at 80-90°C, react until the system becomes turbid, heat up to boiling, keep warm for 0.5 hours, and dehydrate under reduced pressure to obtain 167.0 grams of the thermosetting boron phenolic resin.

[0031] Preparation of the spray-dried composition: Take the above-mentioned 100 grams of thermosetting boron phenolic resin, 20 grams of bisphenol A, 50 grams of acetone, and 0.5 grams of OP-10 and mix them evenly to obtain 170.5 grams of the spray-dried composition with a viscosity of 1000 mPa.s / 25°C.

[0032] The above spray-dried composition was spray-dried in a spray-drying device (inlet temperature 80° C., outlet temperature 150° C.) to ...

Embodiment 2

[0034] Preparation of thermosetting boron phenolic resin: first 100 grams of preheated fused phenol, 120 grams of formaldehyde (34.5%) are sucked into the reaction kettle by vacuum, then add 1 gram of magnesium oxide and 1 gram of zinc acetate, and stir. Heat up to boiling, keep warm for 3 hours, then add 15 grams of boric acid, keep the temperature at 90-100°C, react until the system becomes turbid, heat up to boiling, keep warm for 1 hour, and dehydrate under reduced pressure to obtain 161.0 grams of the thermosetting boron phenolic resin.

[0035] Preparation of the spray-dried composition: Take the above-mentioned 100 grams of thermosetting boron phenolic resin, 10 grams of resorcinol, 100 grams of methanol, and 5 grams of Tween-20 and mix them evenly to obtain 215 grams of the spray-dried composition, which has a viscosity of 3000 mPa. s / 25°C.

[0036] The above spray-dried composition was spray-dried in a spray-drying device (inlet temperature 80° C., outlet temperature...

Embodiment 3

[0038] Preparation of thermosetting boron phenolic resin: first 100 grams of preheated and molten phenol, 120 grams of formaldehyde (38.5%) are sucked into the reactor by vacuum, then add 1 gram of zinc oxide and 1 gram of zinc acetate, and stir Heat up to boiling, keep warm for 3 hours, then add 30 grams of boric acid, keep the temperature at 80-90°C, react until the system becomes turbid, heat up to boiling, keep warm for 1 hour, and dehydrate under reduced pressure to obtain 176.0 grams of the thermosetting boron phenolic resin.

[0039] Preparation of the spray-dried composition: Take the above-mentioned 100 grams of thermosetting boron phenolic resin, 30 grams of bisphenol F, 50 grams of ethanol, and 0.5 grams of OP-7 and mix them evenly to obtain 180.5 grams of the spray-dried composition with a viscosity of 2000 mPa.s / 25°C.

[0040] The above spray-dried composition was spray-dried in a spray-drying device (inlet temperature 80° C., outlet temperature 150° C.) to obta...

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Abstract

The invention discloses a method for preparing thermosetting boron-containing phenolic resin powder, comprising the following steps: (1) preparing a thermosetting boron-containing phenolic resin; (2) preparing a spray drying composition; and (3) preparing the spray drying composition into the thermosetting boron-containing phenolic resin powder by using a spray drying method. The prepared thermosetting boron-containing phenolic resin powder has good fluidity under the conditions of heating and pressure, and has excellent storage stability.

Description

technical field [0001] The present invention relates to a kind of preparation method of synthetic resin powder, more specifically relate to a kind of method that adopts spray drying method to prepare thermosetting boron phenolic resin powder. Background technique [0002] At present, the industrial manufacturing of grinding wheels and friction materials (such as brake pads for automobiles and trains) is mainly based on dry production, while the binder for manufacturing grinding wheels and friction materials is mainly based on thermoplastic phenolic resin powder. On the one hand, thermoplastic phenolic resin needs to be cured by adding urotropine, so that there will be unpleasant ammonia smell during the curing process, which will seriously pollute the environment; on the other hand, it is necessary to manufacture high heat-resistant thermoplastic phenolic resin in industrial production. more difficult. Because the friction material sometimes reaches a very high temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L61/14C08G8/28C08G8/10C09K3/14
Inventor 沈学平
Owner 太仓力达莱特精密工业有限公司
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