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Preparation method of tear resistant silicone rubber mold

A technology of tear resistance and silicone rubber, applied in the field of silicone rubber, can solve the problems of poor tear resistance and tear resistance, and achieve the effect of improving tear resistance, eliminating tear stress and improving environmental protection performance.

Inactive Publication Date: 2015-12-09
DONGGUAN XINXING ORGANIC SILICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the same tear resistance as the existing mold silicone rubber, especially the problem of poor tear resistance at high temperature

Method used

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  • Preparation method of tear resistant silicone rubber mold

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of tear-resistant mold silicone rubber, its step is as follows:

[0026] (1) Pulverize the Ulagrass fiber with a pulverizer, add ammonia water with a mass concentration of 9%, stir in a water bath at 70°C for 80 minutes, take it out, wash it with absolute ethanol until neutral, and dry it in a vacuum oven at 85°C To constant weight, obtain the basalt fiber of alkalization, wherein, the weight ratio of fiber of sage fiber and ammoniacal liquor is 1:25;

[0027] (2) Amino silicone oil, dehydrated alcohol, and sodium cetylbenzenesulfonate were mixed and stirred for 1 hour to obtain a modified emulsion with a weight ratio of 1:1:4, and the modified emulsion was mixed with the obtained product of step (1). Alkalized Ulagrass fibers were added to the reaction kettle together, reacted at 150°C for 4 hours after being ventilated with nitrogen, washed 5 times with deionized water after being taken out, and dried to constant weight at 75°C in a vacuum dryin...

Embodiment 2

[0031] The preparation method of tear-resistant mold silicone rubber, its step is as follows:

[0032] (1) Pulverize the Ulagrass fiber with a pulverizer, add ammonia water with a mass concentration of 9%, stir in a water bath at 70°C for 80 minutes, take it out, wash it with absolute ethanol until neutral, and dry it in a vacuum oven at 85°C To constant weight, obtain the basalt fiber of alkalization, wherein, the weight ratio of fiber of sage fiber and ammoniacal liquor is 1:25;

[0033] (2) Amino silicone oil, dehydrated alcohol, and sodium cetylbenzenesulfonate were mixed and stirred for 1 hour to obtain a modified emulsion with a weight ratio of 1:1:4, and the modified emulsion was mixed with the obtained product of step (1). Alkalized Ulagrass fibers were added to the reaction kettle together, reacted at 150°C for 4 hours after being ventilated with nitrogen, washed 5 times with deionized water after being taken out, and dried to constant weight at 75°C in a vacuum dryin...

Embodiment 3

[0037] The preparation method of tear-resistant mold silicone rubber, its step is as follows:

[0038] (1) Pulverize the Ulagrass fiber with a pulverizer, add ammonia water with a mass concentration of 9%, stir in a water bath at 70°C for 80 minutes, take it out, wash it with absolute ethanol until neutral, and dry it in a vacuum oven at 85°C To constant weight, obtain the basalt fiber of alkalization, wherein, the weight ratio of fiber of sage fiber and ammoniacal liquor is 1:25;

[0039] (2) Amino silicone oil, dehydrated alcohol, and sodium cetylbenzenesulfonate were mixed and stirred for 1 hour to obtain a modified emulsion with a weight ratio of 1:1:4, and the modified emulsion was mixed with the obtained product of step (1). Alkalized Ulagrass fibers were added to the reaction kettle together, reacted at 150°C for 4 hours after being ventilated with nitrogen, washed 5 times with deionized water after being taken out, and dried to constant weight at 75°C in a vacuum dryin...

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Abstract

The invention provides a preparation method of a tear resistant silicone rubber mold. The method includes the steps of: (1) crushing Carex meyeriana fiber, adding ammonia water, conducting water bath stirring, taking the Carex meyeriana fiber out and performing washing, and then carrying out drying to a constant weight to obtain alkalized Carex meyeriana fiber; (2) mixing amino silicone oil, anhydrous ethanol and sodium hexadecyl benzene sulfonate to obtain a modified emulsion, adding the modified emulsion and alkalized Carex meyeriana fiber into a reaction kettle, introducing nitrogen to carry out reaction, then taking the material out and performing washing, and carrying out drying to a constant weight to obtain modified Carex meyeriana fiber; (3) adding siloxane, BR and the modified Carex meyeriana fiber into an open mill, performing mixing, then transferring the materials into a single screw extruder to conduct melt extrusion, thus obtaining a base material; and (4) adding a reinforcing agent, a heat-resistant agent, a crosslinking agent, a thixotropic agent, a stabilizer, weight increase filler into the base material, mixing the materials evenly by a kneader, adding a vulcanizing agent and a promoter, mixing the materials uniformly, carrying out vacuum degassing, then pouring the mixture into a die, and conducting solidification under room temperature, thus obtaining the tear resistant silicone rubber mold. The silicone rubber mold prepared by the method provided by the invention has good tear resistance.

Description

Technical field: [0001] The invention relates to silicone rubber, in particular to a preparation method of tear-resistant mold silicone rubber. Background technique: [0002] The silicone rubber that can be used as a mold is called mold silicone rubber, also known as mold silicone. Before mold silicone was invented, a large number of molds also existed, such as low melting point alloys, paraffin wax, gypsum, epoxy resin, unsaturated polyester resin and polyurethane, etc. for casting molds. At that time, metal or wood was widely used to make molds. This kind of mold not only had a long processing cycle and high cost, but also the products were difficult to demould, and the rate of defective products was high. In the 1960s, the silicone industry began to be formally industrialized. Due to its advantages of convenient operation, low cost, and high mold accuracy, silica gel quickly emerged, replacing metal and wood in large quantities, and became one of the important materials ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L9/00C08L97/02C08H8/00C08K13/02C08K3/36C08K3/34C08K3/22C08K5/098C08K3/26C08K5/14
Inventor 吴细飞
Owner DONGGUAN XINXING ORGANIC SILICON TECH
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