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Acrylic rubber with bimodal molecular weight distribution and preparation method thereof

A molecular weight distribution and acrylate technology, applied in the field of bimodal molecular weight distribution acrylate rubber and its preparation, can solve the problems of poor processing and extrusion performance, low safety factor, poor versatility, etc., and achieve good processing and extrusion performance, The effect of stable production process and strong versatility

Active Publication Date: 2015-02-25
成都道弘氟橡胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Acrylate rubber is a functional polymer material made of acrylate as the main component and copolymerized with a small amount of monomers with active groups. It has properties such as high temperature resistance, ozone resistance, weather aging resistance, and oil resistance. It has special advantages in the oil-resistant rubber products used under the environment, and can also be used together with butyl rubber, fluorine rubber, silicone rubber, EPDM rubber, etc., and is widely used in automobiles, aerospace, chemical, pharmaceutical and transportation industries. Currently, it is mainly used in the United States. And Japanese products, whose molecular weight distribution curve is a unimodal curve, have the disadvantages of poor processing and extrusion performance, low safety factor in the production process, not environmentally friendly, and poor versatility.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Bimodal molecular weight distribution acrylic ester rubber, it is made of A, B two kinds of components, and described A, B two kinds of components are made up of following component raw materials and weight ratio respectively:

[0019] Component A: It is composed of the following component A raw materials and weight ratio: ethyl acrylate 20, butyl acrylate 30, carboxyl-containing olefin 5, ammonium persulfate 0.1, sodium bisulfite 0.1, n-dodecyl mercaptan 0.1, dodecyl Sodium alkylbenzene sulfonate 2.5;

[0020] Component B: It is composed of the following component B raw materials and weight ratio: ethyl acrylate 17, butyl acrylate 24, carboxyl-containing olefin 4, ammonium persulfate 0.1, sodium bisulfite 0.1, n-dodecyl mercaptan 0.1, dodecyl Sodium Alkylbenzene Sulfonate 2.

[0021] The preparation method of above-mentioned bimodal molecular weight distribution acrylate rubber, it may further comprise the steps:

[0022] (1) Add component A raw materials into the re...

Embodiment 2

[0025] Bimodal molecular weight distribution acrylic ester rubber, it is made of A, B two kinds of components, and described A, B two kinds of components are made up of following component raw materials and weight ratio respectively:

[0026] Component A: It is composed of the following component A raw materials and weight ratio: ethyl acrylate 58, chloroolefin 2, potassium persulfate 0.1, dicumyl sulfonate 0.08, sodium lauryl sulfate 3;

[0027] Component B: It is composed of the following component B raw materials and weight ratio: ethyl acrylate 39, chloroolefin 1, potassium persulfate 0.1, dicumyl sulfonate 0.06, sodium lauryl sulfate 2.

[0028] The preparation method of above-mentioned bimodal molecular weight distribution acrylate rubber, it may further comprise the steps:

[0029] (1) Add component A raw materials into the reaction kettle with built-in stirrer, thermometer and reflux condenser, after stirring evenly, heat the reaction kettle, react at 65°C for 55 minut...

Embodiment 3

[0032] Bimodal molecular weight distribution acrylic ester rubber, it is made of A, B two kinds of components, and described A, B two kinds of components are made up of following component raw materials and weight ratio respectively:

[0033] Component A: It is composed of the following component A raw materials and weight ratio: ethyl acrylate 40, butyl acrylate 20, alkoxyethyl acrylate 8, epoxy-containing olefin 2, ammonium persulfate 0.15, diisopropylbenzene sulfonate Ortho ester 0.1, sodium dodecylbenzene sulfonate 2, sodium dodecyl sulfate 1;

[0034] Component B: It is composed of the following component B raw materials and weight ratio: 15 ethyl acrylate, 8 butyl acrylate, 6 alkoxyethyl acrylate, 1 epoxy-containing olefin, 0.1 ammonium persulfate, dodecylbenzene Sodium sulfonate 1, sodium lauryl sulfate 1, dicumyl sulfonate 0.05.

[0035] The preparation method of above-mentioned bimodal molecular weight distribution acrylate rubber, it may further comprise the steps: ...

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PUM

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Abstract

The invention discloses an acrylic rubber with bimodal molecular weight distribution and a preparation method thereof. The acrylic rubber comprises a component A and a component B, wherein the component A comprises acrylic monomers 25-80, active monomers 0-5, an initiator 0.05-0.2, emulsifying agents 2-3 and a regulator 0.05-0.1; the component B comprises acrylic monomers 15-70, active monomers 0-5, an initiator 0.05-0.2, emulsifying agents 2-3 and a regulator 0.05-0.1. The preparation method of the acrylic rubber comprises the following steps of: (1) adding the component A into a reaction kettle, reacting at 60-75 DEG C for 0.5-1 hour, adding the component B at 80-90 DEG C and reacting for 3-8 hours; and (2) diluting, condensing, washing and drying. The invention provides the acrylic rubber with bimodal molecular weight distribution and the preparation method thereof, raw materials are divided into two parts and are polymerized in emulsion under different conditions, and the invention has the advantages of good processing and extrusion properties, high safety coefficient, strong university and the like.

Description

technical field [0001] The invention relates to the field of rubber synthesis, in particular to a bimodal molecular weight distribution acrylate rubber and a preparation method thereof. Background technique [0002] Acrylate rubber is a functional polymer material made of acrylate as the main component and copolymerized with a small amount of monomers with active groups. It has properties such as high temperature resistance, ozone resistance, weather aging resistance, and oil resistance. It has special advantages in the oil-resistant rubber products used under the environment, and can also be used together with butyl rubber, fluorine rubber, silicone rubber, EPDM rubber, etc., and is widely used in automobiles, aerospace, chemical, pharmaceutical and transportation industries. Currently, it is mainly used in the United States. And Japan's products, its molecular weight distribution curve is a unimodal curve, has the disadvantages of poor processing and extrusion performance,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/28C08F120/18C08F2/38C08F2/24C08F6/22C08L33/08
Inventor 周武刚
Owner 成都道弘氟橡胶有限公司