Chloroprene rubber polymer blend and its preparing method

A technology of neoprene and blends, which is applied in the field of neoprene blends and its preparation, can solve the problem of resistance to flex cracking of neoprene materials, deterioration of rubber process performance and physical and mechanical properties, neoprene There is no significant improvement in the resistance to flexing and cracking of rubber materials, and the effect of broad application prospects is achieved.

Active Publication Date: 2009-05-13
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some shortcomings in these current methods: namely, the modification of chloroprene rubber by the above method will make the processing performance and physical and mechanical properties of the rubber compound worse.
In addition, while improving the bonding performance between the neoprene material and the skeleton material, the flex cracking resistance of the neoprene material has not been significantly improved, and it cannot fully meet the needs of the market, so it is very much to be improved
Chinese patent ZL02134362.4 discloses a preparation method of neoprene, but this method only improves the preparation process of powder and granular neoprene from the perspective of adopting a suitable coating agent and a suitable process, and cannot fundamentally Solve the problems of the bonding performance between the neoprene material and the skeleton material, and the flex cracking resistance of the neoprene material

Method used

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  • Chloroprene rubber polymer blend and its preparing method
  • Chloroprene rubber polymer blend and its preparing method
  • Chloroprene rubber polymer blend and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Sulfur-modified chloroprene rubber and trans-polyisoprene blend

[0021] According to the formula batching of table 1, then prepare by following process:

[0022] 1. Plasticize trans-polyisoprene in the general rubber mixing equipment at a temperature range of 100°C for 2 minutes, and then blend with neoprene according to the ratio in Table 1;

[0023] 2. Prepare the rubber compound according to the conventional mixing process;

[0024] 3. After the mixed rubber is parked overnight, vulcanize at 150°C for 30 minutes according to the usual rubber vulcanization process.

[0025] The physical and mechanical properties of the obtained vulcanizates are listed in Table 2. It can be seen from the table that after the sulfur-modified chloroprene rubber and trans-polyisoprene are blended (2#, 3# are neoprene and trans-polyisoprene blends, 1# is conventional chloroprene Rubber), the conventional properties of vulcanized rubber have little change, while the adhesion p...

Embodiment 2

[0029] Embodiment 2 Sulfur-modified chloroprene rubber / natural rubber / natural Eucommia gum blend

[0030] According to the formula batching of table 3, then prepare by following process:

[0031] 1. Put the natural eucommia gum in the general rubber mixing equipment, masticate it for 30 minutes in the temperature range of 60 ℃, and then blend it with neoprene according to the ratio in Table 1;

[0032] 2. Prepare the rubber compound according to the conventional mixing process;

[0033] 3. After the mixed rubber is parked overnight, vulcanize at 150°C for 1 minute according to the usual rubber vulcanization process.

[0034] The physical and mechanical properties of the obtained vulcanizates are listed in Table 4. It can be seen from the table that after the blending of sulfur-modified neoprene / natural rubber and trans-polyisoprene, the general properties, brittleness temperature, and thermal aging properties of the vulcanizate did not change much, while the adhesive propert...

Embodiment 3

[0039] Example 3 Mercaptan-modified chloroprene rubber and gutta-percha blend

[0040] According to the formula batching of table 5, then prepare by following process:

[0041] 1. Masticate gutta percha rubber in the general rubber mixing equipment at a temperature range of 60-100°C for 2-30 minutes, and then blend with neoprene according to the ratio in Table 1;

[0042] 2. Prepare the rubber compound according to the conventional mixing process;

[0043] 3. After the mixed rubber is parked overnight, vulcanize at 150°C for 100 minutes according to the usual rubber vulcanization process.

[0044] The physical and mechanical properties of the obtained vulcanizates are listed in Table 6. It can be seen from the table that after blending mercaptan-modified chloroprene rubber with trans-polyisoprene, the conventional properties of the vulcanized rubber do not change much, while the adhesion performance and flex resistance performance are significantly improved.

[0045] ...

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PUM

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Abstract

This invention relates to chlorobutadiene rubber blend and preparing method thereof. Chlorobutadiene rubber is blended with trans- polyisoprene, so the binding performance of the blend with cord can be improved because of the compliance and easy-to-crystallize characteristic of trans-polyisoprene molecular, at the same time, the flex-crack resistance of cross-link rubber can also be improved. The main feed composition and compounding ratio(part) are: chlorobutadiene rubber 5-100, rubber additive 0-40, trans-polyisoprene 5-50, carbon black or carbon white 5-100,the additional agents such as promoter, sulfuration agent, activator, anti-aging agent and softening agent according to that of regular chlorobutadiene rubber.

Description

(1) Technical field [0001] The invention relates to a modified rubber and a modification treatment method thereof, specifically to a modified rubber in which the rubber reacts with a compound containing carbon-carbon unsaturated bonds and a preparation method thereof (the international patent classification number is C08C19 / 28 ), especially a blend of neoprene and trans-polyisoprene and a preparation method thereof, the neoprene blend has good adhesive properties, and its vulcanizate has excellent flex resistance tortoise crack performance. (2) Background technology [0002] Neoprene has excellent heat resistance, weather resistance, abrasion resistance, oil resistance, and flame resistance, and is widely used in the manufacture of rubber hoses, tapes, shock absorption and other products. In order to withstand high loads, high-frequency movements and ensure service life, chloroprene rubber often uses skeleton materials to enhance the performance of rubber, so most of these ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L11/00C08K3/36C08J3/24
Inventor 黄良平杨军
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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