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Pre-dispersed master batch for foaming rubber and preparation method thereof

A technology for pre-dispersing master batches and rubber foaming, applied in the field of rubber additives, can solve the problems of raw material waste, foaming agent agglomeration and agglomeration, dimensional stability of rubber foam products, uncontrollable specific gravity, etc. effect, low defect rate, avoid dust pollution and the effect of inaccurate dosage

Inactive Publication Date: 2018-12-07
SUZHOU SHUOHONG POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of adding rubber, the traditional foaming agent has the disadvantages of being easy to fly when adding rubber, causing dust pollution to the environment, uneven dispersion and inaccurate measurement, which finally leads to the inability of important indicators such as dimensional stability and specific gravity of rubber foam products. In the state of control, it becomes a defective product or even a waste product
[0004] In addition, the foaming agent is easy to foam early or agglomerate in advance, resulting in a low pass rate of the product and serious waste of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method for pre-dispersed masterbatch particles for rubber foaming, comprising the following steps:

[0031] Weighing: Weigh and take materials according to the following parts by weight: 50 parts of 4,4-oxobisbenzenesulfonyl hydrazide, 15 parts of EPDM rubber, 15 parts of aluminum silicate, 10 parts of naphthenic oil and stearin 10 parts acid;

[0032] Mixing: Mix the weighed 4,4-oxobisbenzenesulfonyl hydrazide, EPDM rubber, aluminum silicate, naphthenic oil and stearic acid, and stir evenly to obtain a mixture;

[0033] Mixing: Mix the mixture in the mixer, and mix evenly at a temperature of 65°C;

[0034] Extrusion: After mixing, transfer to the extruder and extrude to obtain the required pre-dispersed masterbatch.

Embodiment 2

[0036] A preparation method for pre-dispersed masterbatch particles for rubber foaming, comprising the following steps:

[0037] Weighing: Weigh and take materials according to the following parts by weight: 70 parts of 4,4-oxobisbenzenesulfonyl hydrazide, 10 parts of binary ethylene propylene rubber, 10 parts of heavy calcium carbonate, 5 parts of paraffin oil and activator 5 copies;

[0038] Mixing: Mix the weighed binary ethylene propylene rubber, 4,4-oxobisbenzenesulfonyl hydrazide, heavy calcium carbonate, paraffin oil and activator, and stir evenly to obtain a mixture;

[0039] Mixing: Mix the mixture in the mixer, and mix evenly at a temperature of 70°C;

[0040] Extrusion: After mixing, transfer to the extruder and extrude to obtain the required pre-dispersed masterbatch.

Embodiment 3

[0042] A preparation method for pre-dispersed masterbatch particles for rubber foaming, comprising the following steps:

[0043] Weighing: Weigh and take materials according to the following parts by weight: 60 parts of 4,4-oxobisbenzenesulfonyl hydrazide, 12 parts of EPDM rubber, 16 parts of heavy calcium carbonate, 6 parts of paraffin oil and stearin 6 parts acid;

[0044] Mixing: Mix the weighed 4,4-oxobisbenzenesulfonyl hydrazide, EPDM rubber, heavy calcium carbonate, paraffin oil and stearic acid, and stir evenly to obtain a mixture;

[0045] Mixing: Mix the mixture in a mixer, and mix evenly at a temperature of 80°C;

[0046] Extrusion: After mixing, transfer to the extruder and extrude to obtain the required pre-dispersed masterbatch.

[0047] In summary, the present invention points out a pre-dispersed masterbatch for rubber foaming and its preparation method, which is convenient to produce, and the obtained pre-dispersed masterbatch can be used for rubber foaming to...

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Abstract

The invention discloses pre-dispersed master batch for foaming rubber and a preparation method thereof. The pre-dispersed master batch for foaming the rubber is prepared from the following raw materials in parts by weight: 50 to 70 parts of 4,4-oxydibenzenesulfonyl hydrazide, 5 to 15 parts of the rubber, 10 to 20 parts of inorganic filler, 5 to 10 parts of a plasticizer and 5 to 10 parts of a processing auxiliary agent; and after being mixed, the raw materials are uniformly mixed at the temperature of 60 to 90 DEG C, and extruding to prepare the needed pre-dispersed master batch. In this way,the pre-dispersed master batch for foaming the rubber and the preparation method thereof, provided by the invention, have the advantages that the problem that a foaming agent is easy to foam early inadvance or easy to agglomerate and block is solved and the dispersion effect of a foaming agent in the rubber is improved; a specific gravity control range and the size stability of a final rubber foaming product can be effectively controlled; and a special activating agent is added into a product so that actual starting decomposition temperature and a final gas forming amount of the foaming agentcan be more effectively controlled.

Description

technical field [0001] The invention relates to the technical field of rubber additives, in particular to a pre-dispersed masterbatch used for rubber foaming and a preparation method thereof. Background technique [0002] In the field of rubber preparation, rubber foaming is a treatment method that treats rubber with a specific foaming agent so that the rubber has characteristic properties, and is widely used in rubber materials. [0003] In the process of adding rubber, the traditional foaming agent has the disadvantages of being easy to fly when adding rubber, causing dust pollution to the environment, uneven dispersion and inaccurate measurement, which finally leads to the inability of important indicators such as dimensional stability and specific gravity of rubber foam products. In the state of control, it becomes a defective product or even a waste product. [0004] In addition, the foaming agent is easy to foam early in advance or to agglomerate and agglomerate, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K3/26C08K3/34C08J3/22C08J9/10
CPCC08J3/226C08J9/0066C08J9/105C08J2423/16C08K3/34C08K2003/265
Inventor 徐运良李书静
Owner SUZHOU SHUOHONG POLYMER MATERIALS CO LTD
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