Method for preparing high temperature and high humidity resistant mold adhesive

A technology of mold glue and high temperature resistance, which is applied in the field of mold glue processing, can solve the problems of poor heat resistance affecting the fineness and appearance of decoration, increasing production costs of enterprises, and short service life of molds, so as to be suitable for popularization and extended use The effect of improving life and flatness

Inactive Publication Date: 2018-03-09
张晓娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the course of long-term use, it was found that under the condition of high temperature and high humidity, the RTV mold made of the existing mold rubber has a large thermal shrinkage rate, poor dimensional stability, and poor heat resistance, which affects the fineness of the pattern of the manufactured product. and appearance, and lead to a shorter service life of the mold, which greatly increases the production cost of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of high temperature and high humidity resistant mold glue, comprising the following contents:

[0016] (1) In parts by weight, take 10 parts of polyether polyol, 6 parts of modified molecular sieve, 17 parts of talcum powder, 6 parts of fumed silica, 14 parts of octadecyl carbamate, and 2 parts of benzenesulfonic acid Mix, ultrasonically disperse in anhydrous ethanol solution for 35 minutes, the ultrasonic frequency is 55kHz during ultrasonic dispersion, then carry out suction filtration under the condition of vacuum degree of 0.055MPa, stop the suction filtration when no ethanol is filtered out, and take out the filtrate , dried at a temperature of 45°C to a moisture content of 12%;

[0017] (2) Add the equivalent of 7 parts of methyl hydrogen-containing silicone oil to the above dried product, stir evenly, heat at 60°C for 20 minutes, and then hot press for 50 minutes at a pressure of 4MPa and a temperature of 130°C. Minutes, naturally cooled to ...

Embodiment 2

[0022] A preparation method of high temperature and high humidity resistant mold glue, comprising the following contents:

[0023] (1) In parts by weight, take 8 parts of polyether polyol, 7 parts of modified molecular sieve, 15 parts of talcum powder, 8 parts of fumed silica, 12 parts of octadecyl carbamate, and 3 parts of benzenesulfonic acid Mix, ultrasonically disperse in anhydrous ethanol solution for 40 minutes, the ultrasonic frequency is 45kHz during ultrasonic dispersion, then carry out suction filtration under the condition of vacuum degree of 0.065MPa, stop the suction filtration when no ethanol is filtered out, and take out the filtrate , dried at a temperature of 40°C to a moisture content of 15%;

[0024] (2) Add the equivalent of 8 parts of methyl hydrogen-containing silicone oil to the above dried product, stir evenly, heat at 65°C for 18 minutes, and then hot press at 3.5MPa and 140°C After 60 minutes, cool naturally to room temperature after completion to ob...

Embodiment 3

[0029] A preparation method of high temperature and high humidity resistant mold glue, comprising the following contents:

[0030] (1) In parts by weight, take 12 parts of polyether polyol, 4 parts of modified molecular sieve, 20 parts of talcum powder, 4 parts of fumed silica, 15 parts of octadecyl carbamate, and 1 part of benzenesulfonic acid Mix, ultrasonically disperse in anhydrous ethanol solution for 30 minutes, the ultrasonic frequency is 65kHz during ultrasonic dispersion, then carry out suction filtration under the condition of vacuum degree of 0.045MPa, stop the suction filtration when no ethanol is filtered out, and take out the filtrate , dried at a temperature of 50°C to a moisture content of 10%;

[0031] (2) Add the equivalent of 6 parts of methyl hydrogen-containing silicone oil to the above dried product, stir evenly, heat at 55°C for 25 minutes, and then hot press at a pressure of 4.5MPa and a temperature of 120°C After 40 minutes, cool naturally to room tem...

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Abstract

The invention belongs to the technical field of mold adhesive processing and in particular relates to a method for preparing a high temperature and high humidity resistant mold adhesive. The method comprises steps of material mixing and suction filtration, hot pressing treatment, and mold adhesive preparation. Compared with the prior art, the method has the advantages that through suction filtration and hot pressing of raw materials under a vacuum condition, the purpose of synergistic toughening of the raw materials is promoted, the thermal shrinkage of the prepared mold adhesive is remarkablyreduced, relatively good thermal stability of the mold adhesive is achieved, the surface flatness of a product is improved, the service life of a mold is prolonged, and the preparation method is easyto control and applicable to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of mold glue processing, and in particular relates to a preparation method of high-temperature and high-humidity mold glue. Background technique [0002] The silicone specially used to produce handicraft molds is called mold glue. It is generally made of room temperature vulcanized silicone rubber (RTV for short). RTV is a polymer elastomer. It is a synthetic material with silicon atoms and oxygen atoms as the skeleton. Each Silicon atoms contain 1 to 2 organic groups (mainly methyl groups), and are fibrous polymers with Si-O-Si chain belts. Therefore, RTV has the following properties: good chemical stability, non-toxic, non-corrosive; good fluidity, can automatically fill the mold; controllable vulcanization speed, vulcanization at room temperature and pressure, easy to operate and good mold release; simulation Strong, lifelike decoration; mold making speed is fast, generally within 20 hours can be made in...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L71/02C08L67/08C08L83/05C08K13/06C08K9/02C08K9/04C08K7/26C08K3/36C08K3/34C08K5/29C08K5/42
CPCC08L63/00C08L2201/08C08L2205/025C08L2205/035C08L71/02C08L67/08C08L83/04C08K13/06C08K9/02C08K9/04C08K7/26C08K3/36C08K3/34C08K5/29C08K5/42
Inventor 张晓娟
Owner 张晓娟
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