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High-temperature-edible-oil-resistant silicone rubber blend and preparation method thereof

A technology of silicone rubber and edible oil, which is applied in the field of high temperature resistant edible oil silicone rubber blends and its preparation, can solve the problems of poor compatibility and damage to the mechanical properties of silicone rubber, and achieve low cost, good dimensional stability, The effect of small change in mechanical properties

Inactive Publication Date: 2014-11-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unmodified PTFE micropowder has poor compatibility with silicone rubber, which will damage the mechanical properties of silicone rubber.

Method used

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  • High-temperature-edible-oil-resistant silicone rubber blend and preparation method thereof
  • High-temperature-edible-oil-resistant silicone rubber blend and preparation method thereof
  • High-temperature-edible-oil-resistant silicone rubber blend and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0030] In parts by mass, the consumption of each raw material is as follows:

[0031]

[0032] at 6.5 x 10 4Under Pa, use the vacuum ultraviolet radiation source generated by helium plasma to carry out photoetching treatment on the surface of PTFE micropowder for 8 minutes, and expose the etched PTFE micropowder in the atmosphere for more than 10 minutes to obtain surface modified PTFE micropowder. Put methyl vinyl silicone rubber, fumed silica, and hydroxy silicone oil (viscosity 5Pa·s) into the open mill and mix evenly, then add surface-modified PTFE micropowder into the open mill in batches, adjust the roller distance to 1mm, thin Pass 5 times to make it evenly dispersed, and finally add the vulcanizing agent di-tert-butyl peroxide hexane, and mix evenly. The total mixing time is 30 minutes, and the temperature of the roller is controlled below 45°C. Parked for 12 hours, back to practice. The vulcanization condition of the silicone rubber blend is 180°C x 5 minutes, an...

Embodiment 3

[0034] In parts by mass, the consumption of each raw material is as follows:

[0035]

[0036]

[0037] at 6.5 x 10 4 Under Pa, use a vacuum ultraviolet radiation source generated by helium plasma to carry out surface photoetching treatment on the PTFE micropowder for 10 minutes, and expose the etched PTFE micropowder to the atmosphere for more than 10 minutes to obtain a surface-modified PTFE micropowder. Put methyl vinyl silicone rubber, fumed silica, and hydroxyl silicone oil (viscosity 0.5Pa·s) into the open mill and mix evenly, then add surface-modified PTFE micropowder into the open mill in batches, adjust the roller distance to 1mm, Thin pass 8 times to make it uniformly dispersed, and finally add the vulcanizing agent di-tert-butyl peroxide hexane, mix evenly, the total mixing time is 30 minutes, and control the temperature of the rollers below 45°C. Parked for 12 hours, back to practice. The vulcanization condition of the silicone rubber blend is 180°C x 5 min...

Embodiment 4

[0040] In parts by mass, the consumption of each raw material is as follows:

[0041]

[0042] at 6.5 x 10 4 Under Pa, use the vacuum ultraviolet radiation source generated by helium plasma to carry out photoetching treatment on the surface of PTFE micropowder for 8 minutes, and expose the etched PTFE micropowder in the atmosphere for more than 10 minutes to obtain surface modified PTFE micropowder. Put methyl vinyl silicone rubber, fumed silica, and hydroxyl silicone oil (viscosity 0.5Pa·s) into the open mill and mix evenly, then add surface-modified PTFE micropowder into the open mill in batches, adjust the roller distance to 1mm, Thin pass 8 times to make it uniformly dispersed, and finally add the vulcanizing agent di-tert-butyl peroxide hexane, mix evenly, the total mixing time is 30 minutes, and control the temperature of the rollers below 45°C. Parked for 12 hours, back to practice. The vulcanization condition of the silicone rubber blend is 180°C x 5 minutes, and ...

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Abstract

The invention discloses a high-temperature-edible-oil-resistant silicone rubber blend and a preparation method thereof. The blend comprises the raw materials of, by mass, 100 parts of silicone rubber, 40-60 parts of silica, 4-10 parts of silicone oil, 10-50 parts of surface-modified polytetrafluoroethylene (PTFE) micro-powder, and 1.5-5.0 parts of di-tert-butyl hexane peroxide. The surface-modified polytetrafluoroethylene micro-powder is obtained through the following steps: PTFE micro-powder is subjected to a surface photo-etching treatment by using a vacuum ultraviolet radiation source generated by helium plasma; and the etched PTFE micro-powder is exposed in the atmosphere for more than 10min, such that the surface-modified polytetrafluoroethylene micro-powder is obtained. The silicone rubber blend provided by the invention has high mechanical property retention rate in high-temperature edible oils. VOC discharge meets environment protection requirements. The blend has a simple preparation process, and is non-toxic and pollution-free. The blend can be used as a plastic or metal frame coating material of a high-temperature-edible-oil-resistant silicone rubber kitchenware product.

Description

technical field [0001] The invention relates to a silicone rubber blend of high-temperature-resistant edible oil and a preparation method thereof. The blend can be used to produce silicone rubber kitchen utensils (scrapers, spoons, spatulas, tongs, etc.) of high-temperature-resistant edible oil ) plastic or metal skeleton cladding material. technical background [0002] Silicone rubber has the advantages of high and low temperature resistance, weather resistance, insulation, non-toxic environmental protection and physiological inertia, and is widely used in many fields such as electronics, electricity, machinery, chemical industry, medical treatment, and food processing. Heat vulcanized silicone rubber can be used as silicone rubber kitchen utensils, such as spatulas, spoons, spatulas. Clamps etc. Compared with traditional wood and iron kitchen utensils, silicone rubber kitchen utensils have the advantages of soft texture, no damage to the inner surface coating of oil pans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08L27/18C08K13/02C08K3/36C08K5/14B29C35/02
Inventor 郭建华李志才曾幸荣
Owner SOUTH CHINA UNIV OF TECH
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