Preparation method of acid and alkali resistant mold silicone rubber

A silicone rubber, acid and alkali resistance technology, applied in the field of silicone rubber, can solve the problems of small shrinkage, poor acid and alkali resistance, easy demoulding, etc., to achieve improved interface bonding, improve acid and alkali resistance, and reduce acid and alkali The effect of destruction

Inactive Publication Date: 2017-08-04
DONGGUAN XINXING ORGANIC SILICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold silicone rubber has fast curing and molding speed, easy demoulding after molding, small shrinkage, good resilience, no deformation, and easy demoulding. However, it has the same defect of poor acid and alkali resistance as the existing mold silicone rubber. Prone to quality problems in acidic or alkaline workplaces

Method used

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  • Preparation method of acid and alkali resistant mold silicone rubber

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of acid and alkali resistant mold silicone rubber, the steps are as follows:

[0029] (1) Dissolve oleic acid in ethanol and stir until completely dissolved, add deionized water and stir until uniformly dispersed to obtain a modified solution, add nano-zirconia powder to deionized water and ultrasonically disperse for 30 minutes, move to a constant temperature water bath, At the same time, the modified solution was added and stirred at 90°C for 3 hours, after aging for 24 hours, the precipitate was taken out, placed in a vacuum dryer and dried at 100°C for 2 hours, ground and sieved to obtain modified nano-zirconia, in which oleic acid, The weight ratio of nano zirconia powder is 1:4;

[0030] (2) Add 100 parts by weight of methyl vinyl phenyl silicone rubber into the open mill and mix under the condition that the roll distance is 1 mm. After wrapping, add 18 parts by weight of PTFE micropowder and 7.5 parts by weight of the modified compound obta...

Embodiment 2

[0033] The preparation method of acid and alkali resistant mold silicone rubber, the steps are as follows:

[0034] (1) Dissolve oleic acid in ethanol and stir until completely dissolved, add deionized water and stir until uniformly dispersed to obtain a modified solution, add nano-zirconia powder to deionized water and ultrasonically disperse for 30 minutes, move to a constant temperature water bath, At the same time, the modified solution was added and stirred at 90°C for 3 hours, after aging for 24 hours, the precipitate was taken out, placed in a vacuum dryer and dried at 100°C for 2 hours, ground and sieved to obtain modified nano-zirconia, in which oleic acid, The weight ratio of nano zirconia powder is 1:4;

[0035] (2) Add 100 parts by weight of methyl vinyl phenyl silicone rubber to the open mill and mix under the condition that the roll distance is 1 mm. After wrapping, add 20 parts by weight of PTFE micropowder and 7 parts by weight of the modified compound obtained...

Embodiment 3

[0038] The preparation method of acid and alkali resistant mold silicone rubber, the steps are as follows:

[0039] (1) Dissolve oleic acid in ethanol and stir until completely dissolved, add deionized water and stir until uniformly dispersed to obtain a modified solution, add nano-zirconia powder to deionized water and ultrasonically disperse for 30 minutes, move to a constant temperature water bath, At the same time, the modified solution was added and stirred at 90°C for 3 hours, after aging for 24 hours, the precipitate was taken out, placed in a vacuum dryer and dried at 100°C for 2 hours, ground and sieved to obtain modified nano-zirconia, in which oleic acid, The weight ratio of nano zirconia powder is 1:4;

[0040] (2) Add 100 parts by weight of methyl vinyl phenyl silicone rubber into the open mill and mix under the condition that the roll distance is 1 mm. After wrapping, add 16 parts by weight of PTFE micropowder and 9 parts by weight of the modified compound obtain...

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Abstract

The invention provides a method for preparing acid and alkali-resistant mold silicon rubber, the steps of which are as follows: (1) Dissolving oleic acid in ethanol and stirring until completely dissolved, adding deionized water and stirring until uniformly dispersed to obtain a modified solution, adding nano-zirconia powder Add the body into deionized water for ultrasonic dispersion, move it to a constant temperature water bath, add the modified solution and stir at the same time, take out the precipitate after aging, dry, grind and sieve to obtain modified nano-zirconia; (2) Add silicone rubber to Mixing in the open mill, adding PTFE micropowder and modified nano-zirconia after wrapping the rolls, mixing evenly, thinning, releasing the sheet, parking, and obtaining the base material; (3) adding fillers, coupling agents and base materials to vacuum kneading Knead in the machine, heat up, add vulcanizing agent, polymerization inhibitor, accelerator, flame retardant, plasticizer and anti-aging agent, knead, vacuumize, and glue out after 1 hour to obtain acid and alkali resistant mold silicone rubber. The mold silicone rubber prepared by the invention has good acid and alkali resistance, and is suitable for acidic or alkaline working occasions.

Description

[0001] Technical field: [0002] The invention relates to silicone rubber, in particular to a preparation method of acid and alkali resistant mold silicone rubber. [0003] Background technique: [0004] Silicone rubber (called sand glue in Hong Kong and Taiwan) is a special material for molds with a wide range of uses. Silicone rubber has excellent properties and wide uses that other mold materials cannot match: (1) Silicone rubber has good simulation, strength and Very low shrinkage rate; (2) The mold making method is simple and easy, and can be cured at room temperature. The silicone rubber mold has good elasticity, and can be taken out directly after casting the convex and concave parts; (3) The silicone rubber mold can withstand repeated Use, keep the prototype of the part, can produce products in small batches, and the mold modification is also very convenient; (4) Metal inserts and other parts can also be added to the mold, and the finished part can also be electroplated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L27/18C08L83/04C08K13/06C08K9/04C08K3/22C08K7/20C08K5/47
Inventor 吴细飞
Owner DONGGUAN XINXING ORGANIC SILICON TECH
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