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Functionalized environment-friendly regenerated silicone rubber and preparation method thereof

A silicone rubber and functionalized technology, which is applied in the field of functionalized environmentally friendly recycled silicone rubber and its preparation, can solve the problems of low economical preparation process, large energy consumption in the cracking process, harsh reaction conditions, etc., so as to improve the agglomeration phenomenon, The effect of improving fluidity and mechanical properties, improving processability

Inactive Publication Date: 2013-06-26
深圳市利群榕兴科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When recycling waste silicone rubber products, the acid-base catalytic cracking method is usually used to recover the dimethylcyclosiloxane mixture DMC, but this method has the disadvantages of easily causing equipment corrosion and waste liquid pollution.
However, when DMC is prepared by thermal cracking [Wu Shiwei. Silicone rubber corner waste pyrolysis method for producing organosilicon rings. China: CN1201796A[P].1998-12-16.], it needs to be carried out under high temperature and nitrogen protection. The process consumes a lot of energy, the reaction conditions are harsh, and the preparation process is not economical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of recycled silicone rubber compound: colorless and transparent vulcanized rubber scrap produced by a silicone rubber product enterprise in the production of silicone rubber kitchen utensils is used as a raw material, and the waste vulcanized rubber scraps are less than 1mm thick and have random shapes Rubber flakes. The leftovers of silicone rubber vulcanized rubber are washed with water, dried in an oven, and cooled.

[0028] Put the vulcanized silicone rubber scraps into the rubber mill, increase the roller distance to 3mm, pass the roller 5 times, adjust the roller distance to 1~2mm, and gradually add silicon powder and antistatic agent with a particle size range of 1~5μm Octadecylamine ethyl dimethyl-β-hydroxyamine nitrate (abbreviated as antistatic agent SN, produced by Jiangsu Hai'an Petrochemical Plant), after the regenerated silicone rubber is formed into a sheet of wrapping roller, it is mixed with 70 degree silicone rubber Glue (produced by...

Embodiment 2

[0044] A preparation method of regenerated silicone rubber compound: sort the leftovers of silicone rubber vulcanized rubber by color, clean them, oven, put the leftovers of silicone rubber vulcanized rubber into the rubber mill, increase the roller distance to 3mm, and pass the roller 5. Next, adjust the roller pitch to 1~2mm, wrap the roller, and gradually add silicon micropowder and antistatic agent octadecylamine ethyl dimethyl-β-hydroxyamine nitrate (abbreviated as antistatic agent SN, Jiangsu Haian Petroleum) Chemical plant), after the regenerated silicone rubber is formed into a sheet wrapper, add 50°C silicone rubber compound and hydroxy silicone oil, and then add silver-plated glass beads (average particle size of 30~42μm, silver content of 12~16 %, Shenzhen Ruisibeite Technology Co., Ltd.) and dimethyl silicone oil with a viscosity of 1Pa·s, and then put the mixture into a hot blast oven at 150°C for heat treatment for 2 hours. Add vulcanizing agent bis-tert-butylpero...

Embodiment 3

[0060] A method for preparing regenerated silicone rubber compound: classify waste silicone rubber gaskets and gaskets by color, take colorless, transparent, white or light-colored silicone rubber products as raw materials, wash with water, and dry in an oven to remove clean waste. Put the silicone rubber products into the rubber open mill, increase the roll distance to 3mm, pass the roll 5 times, reduce the roll distance to 1~2mm, and gradually add silicon micropowder and antistatic agent octadecylaminoethyldimethyl- β-Hydroxyamine nitrate (abbreviated as antistatic agent SN, produced by Jiangsu Haian Petrochemical Plant), after the regenerated silicone rubber is formed into a sheet, add 50 degree silicone rubber compound and hydroxy silicone oil, and then add trimethyl phosphate Ester activated modified flame retardant magnesium hydroxide (particle size range from 2000 to 6000 mesh, produced by Hefei Huada Flame Retardant Auxiliary Factory), zinc borate (produced by Shandong K...

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Abstract

The invention discloses a functionalized environment-friendly regenerated silicone rubber and a preparation method thereof. According to the method, methyl vinyl silicone rubber vulcanized glue edgings or waste silicone rubber products are classified according to the colors; the materials are washed and dried; edgings or waste silicone rubber products with a same color are added into a rubber open mill; a roll distance is adjusted to 3-5mm, and rolling is carried out 3-6 times; the roll distance is reduced to 1-2mm; silicon micro-powder and an antistatic agent are added; a 50-70 DEG silicone rubber compound is added, and a structure controlling agent is added; a functional filling material and dimethylsilicone oil are added; sheet producing and heat treatment are carried out; the mixture is subjected to roll covering again; a vulcanizing agent bis-tert-butyl isopropylbenzene peroxide is finally added, and sheet producing is carried out. With the method provided by the invention, silicone rubber powder particle electrostatic repulsion is effectively prevented, and waste silicone rubber regeneration time is shortened by more than 50%. The process is simple, energy consumption is low, and the method is non-toxic and environment-friendly. With the method, silicone rubber products with high hardness, or electric conductivity, or flame retardant property, or thermal conductivity can be prepared through vulcanization.

Description

Technical field [0001] The invention relates to a functionalized environmentally friendly regenerated silicone rubber and a preparation method thereof, and belongs to the field of recycling and reuse of waste polymer materials. technical background [0002] Silicone rubber has the characteristics of high and low temperature resistance, weather resistance, insulation, non-toxic environmental protection, and physiological inertness. It has been widely used in electronic and electrical, aviation, aerospace, automotive, machinery, medical and health fields. In the production process of silicone rubber products manufacturers, a large amount of silicone rubber vulcanized rubber scraps and waste products are produced every day. These vulcanized rubber scraps and waste products are often abandoned or sold as waste products. Moreover, my country also produces a large number of waste silicone rubber products every year, such as various silicone rubber gaskets, gaskets, silicone rubber hose...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K13/02C08K3/02C08K5/14C08K3/36C08K13/06C08K9/10C08K7/20C08K3/22C08K3/38C08K5/3492C08K5/5419C08K5/17C08K5/42B29B7/72B29C35/02
Inventor 郭建华曾幸荣
Owner 深圳市利群榕兴科技有限公司
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