Blended rubber of silicon rubber and high density polyethylene and preparation method thereof

A technology of high-density polyethylene and silicone rubber, which is applied in the blending of silicone rubber and high-density polyethylene and its preparation, can solve the problems of high relative elongation, increased viscosity, and poor flow characteristics of materials, and achieve Effects of improving excellent performance, enhancing polymerization ability, and improving fluidity

Inactive Publication Date: 2010-09-08
仝国磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor flow characteristics of high-density polyethylene, when the amount added is small, the relative elongation of the material is high but the strength is low, and when the amount added is high, the polymerization of the rubber is difficult and the viscosity increases significantly, which brings great harm to the product processing. inconvenient
Products such as thin silica gel plates, electrical accessories, and insulators for overhead transmission lines usually require continuous and rapid mass production, and the high viscosity of the rubber will seriously affect the production efficiency of the product
In addition, other properties of the existing adhesives need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh the following raw materials:

[0044] Methyl vinyl silicone rubber 60kg, density 0.965g / cm 3 35kg of polyethylene, A-151 (vinyltriethoxysilane) silane coupling agent 5kg, white carbon black 30kg, dioctyl phthalate 30kg, dicumyl peroxide vulcanizing agent 2.5kg and triene Propyl isocyanurate 3kg, silicone oil 3kg. All the above materials were purchased from the chemical market.

[0045] (a) All solid raw materials are pulverized respectively for subsequent use;

[0046] (b) Mix white carbon black and silane coupling agent, stir at 65°C for 5 minutes, and make a mixture for later use;

[0047] (c) Mix polyethylene with 3.7kg of vulcanizing agent, and stir for 5 minutes at 95°C to make porridge-like rubber;

[0048] (d) The temperature of the internal mixer is controlled at 160°C. Put the silicone rubber, the mixture prepared in step b, the porridge rubber material produced in step c, and silicone oil into the internal mixer, pressurize and heat to 160-170 ℃, kn...

Embodiment 2

[0051] Methyl silicone rubber 75kg, density 0.935g / cm 3 25kg of polyethylene, 8kg of A-171 silane coupling agent, white carbon black (SiO 2 -928) 30kg, plasticizer (dibutyl phthalate) 40kg, dicumyl peroxide vulcanizing agent 4.5kg.

[0052] Preparation:

[0053] (a) All solid raw materials are pulverized respectively for subsequent use;

[0054] (b) Mix white carbon black and silane coupling agent, stir at 90°C for 10 minutes, and make a mixture for later use;

[0055] (c) Mix polyethylene with 2.9kg of vulcanizing agent, and stir for 10 minutes at 130°C to make porridge-like rubber;

[0056] (d) Control the temperature of the internal mixer at 150°C, put the silicone rubber, the mixture prepared in step b, and the porridge rubber produced in step c into the internal mixer, pressurize, heat to 170°C, and knead 25min, the material is ready for use;

[0057] (e) When the temperature of the material drops below 65°C, add the remaining vulcanizing agent, pass through the double...

Embodiment 3

[0059] Methylphenyl vinyl silicone rubber 65kg, density 0.925g / cm 3 Polyethylene 25kg, silane coupling agent KH-560 silane coupling agent 4.0kg, white carbon black 35kg, diisodecyl phthalate plasticizer 35kg, triallyl isocyanurate vulcanizing agent 6kg , silicone oil 2kg, silicone special release agent 2kg.

[0060] Preparation:

[0061] At room temperature, the methyl phenyl vinyl silicone rubber is wrapped in a double-roller plastic refining machine, and the treated white carbon black, additives, and silicone oil are gradually added for mixing. Put the compound after mixing for 24 hours before adding vulcanizing agent. The compound after mixing is thinned for 8 to 10 times, rolled up and then vulcanized on a flat vulcanizer. The first-stage vulcanization temperature is set at 150°C, the vulcanization pressure is 4MPa, and the vulcanization time is 10min. In order to remove the vulcanizing agent and its decomposition products remaining in the modified silicone rubber, carr...

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Abstract

The invention relates to a blended rubber of silicon rubber and high density polyethylene. The blended rubber is prepared from the following raw materials in part by weight: 55 to 75 parts of silicon rubber, 25 to 40 parts of high density polyethylene, 3 to 8 parts of silane coupling agent, 30 to 40 parts of white carbon black, 30 to 40 parts of plasticizer, and 2.0 to 10 parts of vulcanizing agent. The formula of the blended rubber provided by the invention effectively improves the liquidity of the high density polyethylene, enhances the polymerization capacity of the silicon rubber and the high density polyethylene, reduces the viscosity of material blended rubber, and improves excellent performance of the blended rubber. The prepared blended rubber is particularly applied to preparing thin silica gel plates, electric fittings, mold pressing arresters, insulators for overhead power transmission lines, shades for isolating switches, and other products. The method for preparing the blended rubber can effectively reduce the manufacturing cost and further optimize the performance of the rubber.

Description

technical field [0001] The invention relates to rubber and a preparation method thereof, in particular to a blended rubber material of silicone rubber and high-density polyethylene and a preparation method thereof. Background technique [0002] Silicone rubber is an elastomer with polysiloxane as the main chain. It has excellent heat resistance, weather resistance, aging resistance and electrical properties. It is widely used in aerospace, electronic and electrical industries, but the mechanical strength of silicone rubber is low. Poor water resistance. HDPE generally improves the material's mechanical strength properties, such as tensile strength, stiffness, and hardness. Therefore, the application of high-density polyethylene to blend and modify silicone rubber can prepare a blended rubber with both high elasticity and high strength. However, due to the poor flow characteristics of high-density polyethylene, when the amount of addition is small, the relative elongation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08L23/06C08K13/06C08K3/36C08K5/12C08K5/14C08K5/3492
Inventor 仝国磊
Owner 仝国磊
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