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Waste tyre powder rubber sheet and preparation method thereof

A waste tire rubber and rubber sheet technology, which is applied in the field of rubber sheets prepared from waste tire rubber powder and its preparation, can solve the problems of limiting the application range of rubber sheets, the number of unsaturated bonds is small, and it is difficult to obtain mechanical properties of rubber sheets. Achieve the effects of increasing spacing, improving compatibility, and fast vulcanization speed

Active Publication Date: 2015-12-30
JINGDONG RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of the technical scheme of this patent is to use a vulcanization system to vulcanize the residual unsaturated bonds of waste rubber to prepare rubber sheets; however, after the waste tires have been used for a long time, the unsaturated bonds that have not been vulcanized during the rubber production process are also oxidized Exhausted, the number of unsaturated bonds that can participate in the crosslinking reaction is relatively small, and it is difficult to obtain rubber sheets with high mechanical properties only by relying on the unsaturated bonds on the surface of waste tire rubber powder to recrosslink through the vulcanization system, which can only be used for low-grade Inferior products limit the scope of application of the rubber sheet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a rubber sheet made of the following raw materials in parts by weight: 100 parts of 70-mesh waste tire rubber powder, 5 parts of natural rubber, 1.8 parts of accelerator DCP, and 2 parts of sulfur.

[0042] The present embodiment also provides the preparation method of this rubber plate, comprises the steps:

[0043] 1) Add 100 parts by weight of dry and dehydrated waste tire rubber powder, 0.8 parts by weight of accelerator NS, and 1.2 parts by weight of sulfur into a high-speed mixer for pre-mixing at a temperature of 80°C and a time of 5min;

[0044] 2) Put the pre-mixed rubber powder into the internal mixer, then add 5 parts by weight of natural rubber, blend for 6 minutes at a temperature of 50°C and a speed of 30 r / min, and then add 1 part by weight of natural rubber Accelerator and the sulfur of 0.8 parts by weight are discharged after blending for 4 minutes.

[0045] 3) Put the blend into a flat vulcanizer for molding and vulcanization...

Embodiment 2

[0048] This embodiment provides a rubber sheet made of the following raw materials in parts by weight: 100 parts of 80-mesh waste tire rubber powder, 10 parts of styrene-butadiene rubber, 1.4 parts of accelerator NS, and 2.2 parts of sulfur.

[0049] The present embodiment also provides the preparation method of this rubber plate, comprises the steps:

[0050] 1) Premixing, adding 100 parts by weight of dry and dehydrated waste tire rubber powder, 0.8 parts by weight of accelerator NS, and 1.2 parts by weight of sulfur into a high-speed mixer for premixing at a temperature of 60 ℃, time 3min;

[0051] 2) Put the pre-mixed rubber powder into the open mill, then add 10 parts by weight of styrene-butadiene rubber, blend for 4 minutes at room temperature and with a roller distance of 0.8 mm, and then add 0.6 parts by weight Accelerator NS and 1 part by weight of sulfur were mixed for 3 minutes and discharged.

[0052] 3) Vulcanization molding, adding the blend into a flat vulcan...

Embodiment 3

[0055] This embodiment provides a rubber sheet, which is made of the following raw materials in parts by weight: 100 parts of 100-mesh waste tire rubber powder, 5 parts of butadiene rubber, 10 parts of cardanol, 1.2 parts of accelerator NS, and 2 parts of sulfur .

[0056] The present embodiment also provides the preparation method of this rubber plate, comprises the steps:

[0057] 1) premixing, the waste tire rubber powder that is 100 parts by weight of dry dehydration treatment, 10 parts by weight of cardanol, 0.8 parts by weight of accelerator DCP, 1.2 parts by weight of sulfur Add a high-speed mixer for pre-mixing, the temperature is 75 ° C, and the time is 4 minutes;

[0058] 2) Put the pre-mixed rubber powder into the internal mixer, then add 5 parts by weight of butadiene rubber, blend for 4 minutes at a temperature of 70 ° C and a speed of 25 r / min, and then add 0.4 parts by weight Accelerator DCP and 0.8 parts by weight of sulfur are discharged after blending for 3...

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Abstract

The invention provides a waste tyre powder rubber sheet and a preparation method thereof, wherein the waste tyre powder rubber sheet is made from raw materials with parts by weight: 40-100 meshes waste tyre rubber powder 100 parts, rubbers 5-20 parts, accelerants 0.5-4 parts and sulfurs 0.5-4 parts. The rubbers are added into the waste tyre rubber powder, the rubbers with a large number of unsaturated bonds are filled between waste tyre rubber powder particles, are added for many times through a vulcanization system to enable composites to form a multiple crosslinking network between the rubbers and the waste tyre rubber powder and between the waste tyre rubber powder and the rubbers during the vulcanization process, and the multiple crosslinking network is relatively uniformly distributed, and is extremely steady in structure. Vulcanized rubbers are obviously better than rubber sheets which are separately prepared through waste tyre rubber powder or bonding agents in mechanical properties, and can meet the demands of a part of rubber sheets which are used in a static state or a low speed state.

Description

technical field [0001] The invention relates to a rubber sheet and a preparation method thereof, in particular to a rubber sheet prepared from waste tire rubber powder and a preparation method thereof. Background technique [0002] The powder molding recycling technology of waste tire rubber powder is a new technology for efficient recycling of waste vulcanized rubber. Extrusion and other vulcanization molding treatment to form a polymer composite material with excellent performance. The elastomer made of waste tire rubber powder obtained by this method can reach 40%-60% of the mechanical properties of the original rubber; avoiding the complicated chemical modification process of waste tire rubber regeneration, it is suitable for traditional rubber product processing methods, The application range of waste tire rubber powder in various rubber products can be further expanded. [0003] Patent CN200810401368 discloses a rubber sheet prepared from waste rubber and its prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08L9/06C08K5/13C08K3/06B29B7/00B29C35/02
Inventor 沈梅刘娟夏琳卢娜辛振祥
Owner JINGDONG RUBBER
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