Method for preparing rubber master batch from lignin-dispersed calcium sulfate

A kind of technology of calcium sulfate and lignin

Active Publication Date: 2017-01-11
HUNAN MASTER SEALING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, an effective way to solve this problem is to organically modify the surface of calcium sulfate, but the cost of the method is high and the process is complicated.

Method used

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  • Method for preparing rubber master batch from lignin-dispersed calcium sulfate
  • Method for preparing rubber master batch from lignin-dispersed calcium sulfate
  • Method for preparing rubber master batch from lignin-dispersed calcium sulfate

Examples

Experimental program
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Effect test

specific Embodiment 1

[0013] Specific embodiment 1: nitrile rubber / lignin dispersed calcium sulfate composite material

[0014] (1) At room temperature, mix 500 grams of lignin (based on the quality of dry lignin) with 500 grams of industrial calcium sulfate (gypsum) powder (800 mesh) and 600 grams of water and put it into a ball mill tank. Wet ball milling on a ball mill at a speed of 350 rpm for 4 hours to obtain a lignin-dispersed calcium sulfate filler slurry.

[0015] (2) Put the slurry obtained in (1) in a blast drying oven at 70°C for dehydration, so that the water content of the slurry is 20%, and obtain lignin-modified calcium sulfate filler.

[0016] (3) After the nitrile rubber is masticated on the open mill to the wrapping roll, the number of parts by mass of the nitrile rubber is 100 parts, and the proportion of 300 parts of lignin-dispersed calcium sulfate filler is added for blending, and the mixing temperature is 100°C, mixed to constant weight, and prepared nitrile rubber / lignin m...

specific Embodiment 2

[0031] Specific embodiment 2: styrene-butadiene rubber / lignin dispersed calcium sulfate composite material

[0032] (1) At room temperature, mix 600 grams of lignin (based on the quality of dry lignin) with 400 grams of industrial calcium sulfate (gypsum) powder (800 mesh) and 600 grams of water and put it into a ball mill tank. Wet ball milling on a ball mill at a speed of 350 rpm for 4 hours to obtain a lignin-dispersed calcium sulfate filler slurry.

[0033] (2) After the styrene-butadiene rubber is masticated on the open mill to the wrapping roll, the proportion of styrene-butadiene rubber in the mass fraction is 100 parts, and the proportion of lignin-dispersed calcium sulfate filler is 300 parts. The mixing temperature is 100℃, mixed to constant weight, prepared styrene-butadiene rubber / lignin dispersed calcium sulfate masterbatch (100:300); the mixed masterbatch was extruded and granulated by screw to obtain styrene-butadiene rubber masterbatch (styrene-butadiene rubber...

specific Embodiment 3

[0048]Specific embodiment 3: butadiene rubber / lignin dispersed calcium sulfate composite material

[0049] (1) The lignin-dispersed calcium sulfate filler was prepared according to the preparation method in Example 1.

[0050] (2) After the butadiene rubber is masticated on the open mill to the wrapping roll, the number of butadiene rubber in the mass parts is 100 parts, and the proportion of lignin-dispersed calcium sulfate filler is 300 parts. Blending, the mixing temperature at 100°C and mixed to constant weight to prepare butadiene rubber / lignin dispersed calcium sulfate masterbatch (100:300); the mixed masterbatch was extruded and granulated by screw to obtain butadiene rubber masterbatch (butadiene rubber Rubber / Lignin Dispersed Calcium Sulfate=100:300).

[0051] (3) According to the formula dosage in Table 9, plasticize the butadiene rubber on the open mill at low temperature for 10 minutes, then add the butadiene rubber masterbatch and BIPB in turn, mix at room temper...

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Abstract

The invention relates to a method for preparing a rubber master batch from lignin-dispersed calcium sulfate. The method comprises the following steps: 1. lignin-dispersed calcium sulfate preparation: proportionally mixing lignin and calcium sulfate, adding water which accounts for a certain ratio of the lignin-calcium sulfate mixture, uniformly mixing, carrying out wet-process ball milling on a ball mill for 4 hours to obtain a lignin-dispersed calcium sulfate slurry, and dewatering the obtained slurry at a certain temperature to obtain a hydrous lignin-dispersed calcium sulfate filler; and 2. blending the hydrous lignin-dispersed calcium sulfate filler in the step 1 and rubber in an open mill or Banbury mixer, and carrying out extrusion and granulation to prepare the rubber master batch. The application research indicates that the rubber master batch can be used as a reinforcing agent and can greatly enhance the mechanical properties of the rubber material. The method has the advantages of simple technique, cheap and accessible raw materials and the like.

Description

technical field [0001] The invention relates to a method for preparing rubber masterbatch by using lignin-dispersed calcium sulfate, which belongs to the fields of rubber filling modification and resource recycling comprehensive utilization. Background technique [0002] Most polymers such as plastics and rubber need to be filled to improve their performance and reduce costs. Calcium sulfate is an important type of inorganic filler. The characteristics of its filled polymer include good processability and a larger filling amount than other fillers. However, like other inorganic fillers, calcium sulfate has the disadvantages of high surface energy, easy agglomeration, large polarity difference with polymer materials, difficulty in mixing, and difficulty in dispersing, which directly affects the performance of polymer composite materials. In order to improve the deficiency of calcium sulfate, organic matter such as coupling agent is usually used to modify the surface of calci...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/30C08L9/02C08L9/06C08L9/00C08J3/22
Inventor 苏胜培汪巧蕾罗琼林王曦杨治刘祥
Owner HUNAN MASTER SEALING
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