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Preparation method of durable ultrahigh temperature resisting acrylic rubber

A polyacrylate and acrylate technology, which is used in the preparation of durable and ultra-high temperature-resistant polyacrylate rubber, can solve the problems of few types of silicon-containing or fluorine-containing monomers, uneconomical, high price, and avoid side effects. The effect of reaction, increase of average molecular weight and strong penetration

Inactive Publication Date: 2011-10-19
李梅
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AI Technical Summary

Benefits of technology

This technology uses powerful waves from an external source that helps start up the process quickly without adding any complicated components like another type of substance called catalyst. By controlling this light beam's intensity with different wavelength ranges, it becomes possible for the resulting product to have very pure materials while avoiding unwanted side reagents during production. Additionally, by utilizing these techniques overcomes issues such as poor mixing between monomers when producing highly concentrations of polyacrylate elastomeric material due to excess heat generated during initial stages of the initiation phase. Overall, this method allows for efficient use of resources and improved manufacturing efficiency.

Problems solved by technology

The technical problem addressed in this patented text relates to improving the thermal properties of poly(ACM) resins while maintaining their good mechanical strength and durability under severe conditions like engine oils.

Method used

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  • Preparation method of durable ultrahigh temperature resisting acrylic rubber

Examples

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Effect test

Embodiment 1

[0017] Example 1. 10 parts of methyl acrylate, 75 parts of ethyl acrylate, 10 parts of isooctyl acrylate, 5 parts of vinyl chloroacetate, 180 parts of deionized water, 3 parts of sodium lauryl sulfate, and 102 parts of OP-10.

[0018] First, add sodium lauryl sulfate, OP-10 and deionized water into the emulsification tank and stir to dissolve; then mix the acrylate monomer, low-temperature monomer, and vulcanization point monomer into the emulsification tank. Emulsify at high speed for 20 minutes. Transfer the emulsified emulsion to the reactor, 60 The Co high-energy ray initiates polymerization, the reaction temperature is controlled at 40°C-50°C, and the total absorbed dose reaches 30kGy to complete the reaction. At this time, the polyacrylate emulsion has been prepared. Under the condition of 80°C, add the polyacrylic acid emulsion into the alum solution with a mass percentage of 5% to break the emulsion, stir while adding the emulsion, and wait until the emulsion is comp...

Embodiment 2

[0025] Example 2. 10 parts of methyl acrylate, 60 parts of ethyl acrylate, 25 parts of butyl acrylate, 5 parts of vinyl chloroacetate, 200 parts of deionized water, 3 parts of sodium lauryl sulfate, 102 parts of OP-10. Use the method of embodiment 1 to make acrylate raw rubber.

[0026] 100 parts of raw rubber, 60 parts of N5506, 10 parts of kaolin, 1.5 parts of stearic acid, 2 parts of antioxidant 445, 1.5 parts of TCY, 3 parts of BZ, 2 parts of microcrystalline wax, 5 parts of RS107. Use the method of embodiment 1 to make rubber product.

[0027] In addition to the general advantages of the product in Example 1 above, the rubber product of this example also has good mechanical processing performance, has small volume expansion after long-term immersion in oil, and can still be used normally at -20°C.

Embodiment 3

[0028]Example 3. 7 parts of methyl acrylate, 70 parts of ethyl acrylate, 20 parts of butyl acrylate, 2 parts of acrylic acid, 2 parts of methacrylic acid, 180 parts of deionized water, 3 parts of sodium lauryl sulfate, 102 parts of OP-10. Use the method of embodiment 1 to make acrylate raw rubber.

[0029] 100 parts of raw rubber, 15 parts of N330, 50 parts of N550, 10 parts of graphite powder, 1.5 parts of stearic acid, 2 parts of antioxidant 445, 1.5 parts of DOTG, 1 part of Diak No.1 curing agent, 2 parts of microcrystalline wax copies, NB-45 copies. Use the method of embodiment 1 to make rubber product.

[0030] As automotive oil seals and transformer oil seals, the material in this embodiment can be used for a long time at 180°C.

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Abstract

The invention relates to a preparation method of durable ultrahigh temperature resisting acrylic rubber, belonging to the field of rubber chemical synthesis. In the method, an acrylic ester monomer, a low-temperature monomer and a vulcanization site monomer are used as comonomers, deionized water and an emulsifying agent are used for assisting, and a complex initiator system in the process that emulsion polymerization is initiated by a chemical method is removed, so that the process formulation is simplified. In the preparation method, high-energy radiation at room temperature is adopted to initiate emulsion polymerization reaction, pre micro crosslinking is adopted to increase gel content in crude rubber, so as to improve the average molecular weight of the crude rubber and finally achieve the purposes of improving heat-resisting upper limit of the acrylic rubber. Acrylic rubber (ACM) products can be used for a long time under a high-temperature oil seal environment of 170 DEG C, andcan be used for a short time intermittently under the temperature with 200 or more than 200 DEG C, and simultaneously has good mechanical processing property.

Description

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Claims

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Application Information

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Owner 李梅
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