Preparation method for thermosetting hard resin

A solid resin and thermosetting technology, which is applied in the field of thermosetting resin preparation, can solve the problems of high risk of resin gel, high resin viscosity, and difficult control, and achieve stable friction coefficient, avoid resin gelation, and wear resistance Good results

Active Publication Date: 2009-08-05
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the viscosity of the resin is high and the temperature is high at this time, the risk of resin gelation in this method is high, and the control is difficult

Method used

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  • Preparation method for thermosetting hard resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Phenol 500g, 37% formaldehyde solution 776g and ammonia water (25%) 12.5g are dropped in the reaction vessel that has thermometer, agitator, reflux condenser, heat up to 70 DEG C constant temperature reaction 1 hour, heat up to 85 DEG C and react 90 Minutes, then distilled under reduced pressure at a vacuum degree of -0.092MPa, the dehydration temperature does not exceed 65°C, when the moisture content in the resin reaches 1.56wt%, pour the resin into an enamel dish, put it in an oven at 70°C, and when the resin is polymerized When the speed reaches 54S, the enamel dish is taken out from the oven and cooled to obtain 641g of thermosetting resin.

Embodiment 2

[0016] Put 500g of phenol, 776g of 37% formaldehyde solution and 10g of sodium hydroxide solution (47%) into a reaction vessel with a thermometer, a stirring device, and a reflux condenser, heat up to 70°C for constant temperature reaction for 1 hour, then heat up to 85°C React for 90 minutes, then distill under reduced pressure under vacuum degree -0.092MPa pressure, dehydration temperature does not exceed 65°C, when the moisture content in the resin reaches 1.56wt%, pour the resin into an enamel plate, put it in an oven at 70°C, and when The polymerization rate of the resin reached 56S, and the enamel dish was taken out from the oven to cool down to obtain 651g of resin.

Embodiment 3

[0018] Phenol 500g, cashew nut oil 50g, 37% formaldehyde aqueous solution 806g and ammoniacal liquor (25%) 12.5g drop in the reaction container that has thermometer, stirring device, reflux condenser, heat up to 70 ℃ of constant temperature reaction 1 hour, be warmed up to React at 85°C for 90 minutes, then distill under reduced pressure at a vacuum degree of -0.092MPa, and the dehydration temperature does not exceed 65°C. When the moisture content in the resin reaches 1.96wt%, pour the resin into an enamel tray and put it in an oven at 70°C. When the polymerization speed of the resin reaches 57S, the enamel plate is taken out from the oven and cooled to obtain 712 resin.

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Abstract

Production of thermosetting plastic solid resin is carried out by putting phenol, aldehyde and catalyst into reactor, raising temperature, reacting, decompressing while dewatering with water content between 1-2 wt%, discharging resin from reactor, baking at 0-100 deg. C in vacuum loft drier, inspecting polymerization speed, stopping bake when reach polymerization speed to 55-57 seconds, and cooling to normal temperature to obtain final product. It has better abrasive resistance, stable friction coefficient and no brake noise; it can avoid resin gel and be used as excellent brake material for vehicles.

Description

technical field [0001] The invention relates to a preparation method of thermosetting resin. The resulting resin is a solid resin. Background technique [0002] One-step phenolic resin generally exists in liquid state, and the application of liquid resin is limited in some occasions or the production process is relatively complicated. For example, in the production of friction materials, when liquid one-step resin is used, the production process is more complicated. Firstly, various raw materials are mixed with resin evenly in a kneader, and then the mixture is dried in a vacuum drying oven to remove volatile matter. Finally pressed on a heat press. On the contrary, if solid one-step resin is used, the production process is relatively simple. After mixing the resin powder with other raw materials evenly, they are directly pressed on a hot press, which greatly simplifies the production process and improves production efficiency. [0003] Liquid resin has a short storage pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/04
Inventor 唐路林刘为李枝芳刘耀
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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