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Preparation method for halogen-free flame-retardant rubber composite

A technology of flame-retardant rubber and composite materials, which is applied in the direction of fibrous filler, dyed organic silicon compound treatment, dyed polymer organic compound treatment, etc. It can solve the problems of poor flame-retardant effect, coarse particle size, and low flame-retardant efficiency. Achieve the effects of reducing production costs, high thermal decomposition temperature, and avoiding secondary hazards

Active Publication Date: 2012-08-01
GUANGDONG SUNLITE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the amount is small, the flame retardant effect is poor and often fails to meet the requirements; when the amount is large, the physical and mechanical properties of the rubber vulcanizate will be significantly reduced, and it is easy to cause mixing difficulties.
The biggest problem with halogen-free flame-retardant rubber composites is that it is difficult to balance the flame-retardant and mechanical properties of vulcanized rubber and the processing performance of compound rubber. Emphasis and Hotspots of Rubber Science Research
[0003]At present, there are two main problems in directly adding domestically produced industrial Al(OH)3 (100-200 mesh) to rubber : First, the particle size is too thick; Second, the efficiency of flame retardant alone is not high
A large amount of addition not only seriously affects the physical and mechanical properties of rubber products, but also deteriorates the molding and processing performance and makes the rubber mixing operation difficult.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) 50 parts by mass of aluminum hydroxide nanoparticles were mixed and stirred with a silane coupling agent solution, dried at 120°C for 10 hours, and then dried at 150°C for 1 hour, and put into a desiccator for use.

[0012] (2) Mix 100 parts by mass of EPDM raw rubber and filler with a banbury mixer, cool the mixed rubber and add it to the roller. After the rubber wraps the roller, add 10 to 300 parts according to the formula design. Al(OH) in parts by mass 3 Nanoparticle dry powder heat-conducting filler, 1-5 parts by mass of accelerator, repeatedly kneaded on the roller until uniform, thin pass 5-10 times, then add 1-3.5 parts by mass of vulcanizing agent, and mix evenly, thin pass The next piece is to get the flame retardant rubber compound;

[0013] (3) After preforming the mixed EPDM rubber, put it into the mold, and after filling the mold with cold pressure, place the mold on a flat vulcanizing machine for one-stage vulcanization. The first-stage vulcan...

Embodiment 2

[0017] (1) Mix and stir 100 parts by mass of Al(OH)3 nanoparticles with a silane coupling agent solution, dry at 120°C for 10 hours, and then dry at 150°C for 1 hour, then put it in a desiccator for use .

[0018] (2) Mix 100 parts by mass of EPDM raw rubber and filler with a banbury mixer, cool the mixed rubber and add it to the roller. After the rubber wraps the roller, add 10 to 300 parts according to the formula design. Al(OH) in parts by mass 3 Nanoparticle dry powder heat-conducting filler, 1-5 parts by mass of accelerator, repeatedly kneaded on the roller until uniform, thin pass 5-10 times, then add 1-3.5 parts by mass of vulcanizing agent, and then knead evenly, thin pass The next piece is to get the flame retardant rubber compound;

[0019](3) After preforming the mixed EPDM rubber, put it into the mold, and after filling the mold with cold pressure, place the mold on a flat vulcanizing machine for one-stage vulcanization. The first-stage vulcanization temperat...

Embodiment 3

[0023] (1) 150 parts by mass of Al(OH) 3 The nanoparticles were mixed and stirred with a silane coupling agent solution, dried at 120°C for 10 h, and then dried at 150°C for 1 h, and put into a desiccator for use.

[0024] (2) Mix 100 parts by mass of EPDM raw rubber and filler with a banbury mixer, cool the mixed rubber and add it to the roller. After the rubber wraps the roller, add 10 to 300 parts according to the formula design. Parts by mass of Al(OH)3 nanoparticle dry powder heat-conducting filler, parts by mass of accelerator 1-5, repeatedly kneaded on the roller until uniform, thin pass 5-10 times, and then add 1-3.5 parts by mass for vulcanization agent, and then kneaded evenly, and thinly pass the next sheet to obtain a flame-retardant rubber compound;

[0025] (3) After preforming the mixed EPDM rubber, put it into the mold, and after filling the mold with cold pressure, place the mold on a flat vulcanizing machine for one-stage vulcanization. The first-stage...

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Abstract

The invention discloses a preparation method for a halogen-free flame-retardant rubber composite. The method comprises the following steps: A, forming Al(OH)3 nanoparticles; B, drying the Al(OH)3 nanoparticles obtained in the step A in an air dry oven, wherein a mixture of the Al(OH)3 nanoparticles and the solution of a silane coupling agent is pre-dried at a temperature of 150 DEG C for 50 min so as to realize said drying; C, adding the Al(OH)3 nanoparticles obtained in the step B into ethylene propylene diene monomer (EPDM) rubber which has undergone plastication / banburying, further adding rubber oil, a promoter and a vulcanizing agent, carrying out repeated mixing on a roller until a uniform mixture is obtained, and carrying out thin-passing and slice-making so as to obtain an EPDM rubber compound; and D, putting the mixed EPDM flame-retardant rubber into a mould, carrying out primary sulfuration after cold pressing and mould filling, and then putting the rubber in the air dry oven on glass cloth for secondary sulfuration so as to obtain a finished product of the halogen-free flame-retardant rubber composite. According to the invention, flame retardation of the EPDM rubber is substantially improved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a preparation method of a halogen-free flame-retardant rubber composite material. Background technique [0002] Due to the light weight, water resistance, moisture resistance, excellent electrical insulation properties and excellent molding processability of polymer materials such as rubber, they are widely used in aviation, transportation, construction and household appliance industries. However, because most of the polymer materials are hydrocarbons, they are flammable, and fires are often caused by overheating and short circuits. Therefore influenced to a certain extent the further popularization of macromolecular materials such as rubber in the electrical industry. Therefore, solving the flame retardant problem of polymer materials such as rubber has become an important issue in the development of the current applied polymer industry. There is an urgent need to develop flam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K9/10C08K9/06C08K3/22C09C1/40C09C3/12C09C3/10C08F287/00
Inventor 陈伟燕于日志李虹征杨家荣曹焕仁蒙校宗
Owner GUANGDONG SUNLITE MATERIAL SCI & TECH
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