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Rubber additive pre-dispersion, preparation method thereof and method for preparing rubber additives

A pre-dispersion and additive technology, which is applied in the field of rubber additive preparation, can solve the problems of product physical and mechanical properties reduction, affecting product qualification rate, product appearance defects, etc., to reduce the time of material mixing, simple manufacturing process, and dispersibility Improved effect

Inactive Publication Date: 2012-08-01
ZHUHAI SPECIAL ECONOMIC ZONE KEMAO RUBBER & PLASTIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dry powder masterbatch is produced by direct pressure granulation of dry powder or wet bonding granulation. Although these two methods are simple and quick, the concentration of the obtained additive masterbatch is relatively high, but due to the high pressure used in the manufacturing process, the powder It is easy to form hard agglomerates during the growth process of granules, and it is not easy to disperse after adding rubber ingredients, which will cause unevenness of ingredients
Undispersed hard agglomerates will remain in the rubber compound and are not easy to filter out. The physical and mechanical properties of the resulting product will be reduced or cause product appearance defects, which will affect the pass rate of the product and eventually lead to an increase in production costs.

Method used

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  • Rubber additive pre-dispersion, preparation method thereof and method for preparing rubber additives
  • Rubber additive pre-dispersion, preparation method thereof and method for preparing rubber additives
  • Rubber additive pre-dispersion, preparation method thereof and method for preparing rubber additives

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preparation example Construction

[0027] The preparation method of the rubber additive predispersion comprises the following steps: (1) After weighing EPDM (ethylene propylene diene monomer), CPE (resin-type chlorinated polyethylene) and stearic acid in a certain proportion, add them to the banburying (2) Turn on the internal mixer and knead for 5 to 10 minutes until the mixture softens into a soft mass, then stop the kneading and cut the material for later use to obtain a rubber additive pre-dispersion.

[0028] Such as figure 1 As shown, the preparation method of the rubber additive includes the following steps: a. Calculated by weight, 8% to 15% of the rubber additive predispersion, 50% to 80% of the additive dry powder to be pre-dispersed and 2% to Put 10% rubber processing oil into the internal mixer for mixing, wherein the mixing time is 5 to 10 minutes, the mixing temperature is controlled between 65°C and 110°C, and the internal mixer is turned on once during the mixing process, so that The sizing mat...

Embodiment 1

[0030] Embodiment one: Make dry powder vulcanization accelerator MBTS into granular products

[0031] Such as figure 1 As shown, weigh according to figure 2 Put 4.72KG of the pre-prepared rubber additive pre-dispersion shown in Attached Table 1 into the internal mixer, add 36 KG of dry powder MBTS to be dispersed, start the internal mixer, slowly add white mineral oil for rubber processing, Put down the pressurized weight and the dust cover to complete the set mixing time, about 5 to 8 minutes in total. During this period, the dust cover is opened, and the pressure weight is raised, so that the rubber material in the mixing chamber can be freely rolled twice to ensure complete mixing and uniformity. After the materials in the mixing chamber are completely mixed to form soft and moist lumps, they can be fed into the extruder for pelletizing. Cylindrical fluid rubber particles with a diameter of about 5 mm and a length of about 3 to 5 mm can be obtained after being cooled ...

Embodiment 2

[0032] Embodiment two: Preparation of dry powdered rubber vulcanizing agent sulfur S into granular products

[0033] Such as figure 1 As shown, weigh according to image 3 Put 4.95KG of the pre-prepared rubber additive pre-dispersion shown in Attached Table 2 in the internal mixer, add dry powder sulfur S44KG to be dispersed, start the internal mixer, slowly add white mineral oil for rubber processing, put it down and pressurize The mound and the dust cover complete the set mixing time, about 5 to 8 minutes in total, during which the dust cover is opened and the pressure mound is raised, so that the rubber in the mixing chamber can turn over freely twice to ensure complete mixing uniform. After the materials in the mixing chamber are completely mixed to form soft and moist lumps, they can be fed into the extruder for pelletizing. Cylindrical fluid rubber particles with a diameter of about 5 mm and a length of about 3 to 5 mm can be obtained after being cooled by a blast ...

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Abstract

The invention discloses a rubber additive pre-dispersion which is high in compatibility with different kinds of rubber and of which the residual components do not influence the performance of rubber products and a simple method for preparing the rubber additive pre-dispersion conveniently. In addition, the invention also provides a method for preparing rubber additives containing the rubber additive pre-dispersion. The rubber additive pre-dispersion can be suitable for different rubber additives and is high in compatibility with different rubber products; components of the rubber additive pre-dispersion do not influence the vulcanization characteristics of ingredients and the physical properties of the products; and the rubber additive pre-dispersion and additive master batches can be granulated in an extruder by regulating a ratio of resin type chlorinated polyethylene (CPE) to a corresponding plasticizer and mixing in a banburying machine, and the master batches are blown into a collector through an air blower and are cooled transiently to obtain the pre-dispersion finish products of various additives. The rubber additive pre-dispersion can be widely applied to the field of production of the rubber additives.

Description

technical field [0001] The invention relates to a rubber additive predispersion, a preparation method of the rubber additive predispersion, and a preparation method of a rubber additive containing the rubber additive predispersion. Background technique [0002] Rubber additives (such as vulcanization accelerators, etc.) are mostly in the form of dry powder, with low bulk density and easy to fly, especially in wet conditions, it is easy to adhere to the metal surface, and it is not easy to disperse in the dry state. In rubber ingredients. During the production and application of rubber dry powder additives, there is a lot of dust flying, which is likely to cause excessive dust in the workplace and seriously affect the health of workers (such as irritating the skin and respiratory tract, affecting reproductive and physiological health, causing allergies, inhaling toxic dust etc.), and will cause pollution to the ecological environment (such as toxicity to aquatic organisms, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/28C08K5/09C08L21/00B29B7/00B29B9/00
Inventor 王新生
Owner ZHUHAI SPECIAL ECONOMIC ZONE KEMAO RUBBER & PLASTIC MATERIAL CO LTD
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