CN1534057A - Composition using butyl rubber reclaimed rubber as base material - Google Patents
Composition using butyl rubber reclaimed rubber as base material Download PDFInfo
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- CN1534057A CN1534057A CNA03116207XA CN03116207A CN1534057A CN 1534057 A CN1534057 A CN 1534057A CN A03116207X A CNA03116207X A CN A03116207XA CN 03116207 A CN03116207 A CN 03116207A CN 1534057 A CN1534057 A CN 1534057A
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Abstract
A composition based on the regenerated butyl rubber is disclosed, which features use of sulfur-promoter sulfurizing system, especially the hyposulfamide as the first promoter. Its advantages are high machinability and high physical and mechanical properties.
Description
Technical field
The present invention relates to a kind of compounding technique of elastomeric material, promptly a kind of composition based on the isoprene-isobutylene rubber reclaimed rubber.Specifically, processing performance is good when relating to a kind of the sulfuration, the composition based on the isoprene-isobutylene rubber reclaimed rubber that sulfuration back physical and mechanical properties is improved.
Background technology
Isoprene-isobutylene rubber is the elastomerics that a kind of molecular chain has the height saturated structures, plain with ageing-resistant, internal friction is big, shock-absorbing capacity good and be used for various bumper and absorbing shock elastomeric articles field.But domestic present isoprene-isobutylene rubber is dependence on import basically, so price is higher.If can make the isoprene-isobutylene rubber reclaimed rubber with waste butyl vulcanized rubber through regeneration processing.Replace isoprene-isobutylene rubber with it, then, all have very significant meaning no matter from reducing product cost, resource recovery, make full use of material resources, saving starting material.
Usually, for the sulfuration of isoprene-isobutylene rubber, because it has HI SA highly saturated molecular chain structure, the active site on the molecular chain is few, when adopting Sulfur-promotor vulcanization system, need select for use with thiurams and dithiocarbamate(s) is that the high speed vulcanization accelerator of representative is as first promotor.As " rubber industry handbook " first fascicle (chief editor such as Xie Suizhi, Chemical Industry Press publishes, 1989) chapter 8 the 3rd joint and " rubber process principle " (Deng Bencheng, Ji Kuijiang chief editor, Chemical Industry Press publishes, nineteen ninety-five, p.80) described in.Dithiocarbamatetype accelerator, as: zinc dibutyl dithiocarbamate, tellurium diethyl dithiocarbamate, cupric dimethyldithiocarbamate etc.Thiuram type accelerator is as tetramethyl-thiuram disulfide, tetraethylthiuram disulfide etc.They all belong to ultra fast accelerator, are applied to the sulfur sulfide system of rubber, can promote the vulcanization reaction of rubber greatly, improve vulcanization rate.But when being applied to the composition based on the isoprene-isobutylene rubber reclaimed rubber, but have following some shortcomings part: 1) time of scorch is short, can reduce the processing safety of sizing material, causes based on the composition process performance of isoprene-isobutylene rubber reclaimed rubber not good; 2) physical and mechanical properties behind the composition hardening is relatively poor, and particularly tensile strength is lower, can not satisfy the requirement of some goods technical indicator, so that its application facet is restricted.
Summary of the invention
Because the general existing above-mentioned shortcoming of isoprene-isobutylene rubber vulcanization system commonly used, the purpose of this invention is to provide a kind of composition based on the isoprene-isobutylene rubber reclaimed rubber, it not only gives the isoprene-isobutylene rubber reclaimed rubber good tensile strength, and can make the composition based on the isoprene-isobutylene rubber reclaimed rubber have good processing safety and processing technology.
The present invention is achieved in that a kind of composition based on the isoprene-isobutylene rubber reclaimed rubber, adopts Sulfur-promotor vulcanization system, it is characterized in that, and be first promotor with sulphenamide.Sulfenamide type accelerators is a back vulcanization promoter commonly used in the rubber industry, has following general structure:
Usually, this sulfenamide type accelerators is used for as tire in the vulcanization system based on the large thick-wall goods of conventional rubber more.The present inventor but is surprised to find that and uses it for to replace dithiocarbamate(s) or thiurams vulcanization accelerator as first promotor in the vulcanization system of the composition of isoprene-isobutylene rubber reclaimed rubber, be used to make some bumper and absorbing shock goods, can make qualified product based on full isoprene-isobutylene rubber reclaimed rubber.At this moment, the consumption of sulfenamide type accelerators is 100 weight parts in the isoprene-isobutylene rubber reclaimed rubber, is preferably 1～5 weight part, and this can cause the state of vulcanization deficiency with quantity not sufficient 1 weight part, and the strength of materials, elasticity after the sulfuration are not good enough; This consumption surpasses 5 weight parts, does not only have further effect, may the physical and mechanical properties of cross-linked rubber be had a negative impact on the contrary.
Be easy to get from material source, effect is obvious that angle is set out, above-mentioned sulfenamide type accelerators can be for what select for use: N-cyclohexyl-2-[4-morpholinodithio base sulphenamide (trade name: accelerant CZ), N, accelerant A Z) and N-oxygen diethylene-2-[4-morpholinodithio sulphenamide (trade name: promotor: DZ) N-two ring ethyl-2-[4-morpholinodithio sulphenamides (trade name:.
The present composition once was used for producing the bumper and absorbing shock pad that certain engineering is used.Original use is not a regenerated import isoprene-isobutylene rubber, and based on it, adopting traditional is to produce qualified product with thiuram type accelerator as the sulfur sulfide system of first promotor, and still, its cost is higher, is not suitable for introducing to the market as commodity; If change composition into based on the isoprene-isobutylene rubber reclaimed rubber, still use traditional with the sulfur sulfide system of thiuram type accelerator as first promotor since sulfuration afterwards the physical and mechanical properties of rubber is on the low side, can not produce qualified product all the time.After adopting the present invention, not only processing performance is improved, and the physical machine performance of finished product also is significantly improved, and obtains the quality approval of relevant department, and not only product cost declines to a great extent, and product percent of pass obviously improves, and effect is fairly obvious.
Embodiment
Further specify the present invention below in conjunction with embodiment, but the present invention is not limited to these embodiment.
In the following embodiments, except that indicating especially, " part " is " weight part ", and is as follows in order to the essentially consist based on the composition of isoprene-isobutylene rubber reclaimed rubber of demonstration the present invention's effect:
Component title consumption (weight part)
Isoprene-isobutylene rubber reclaimed rubber 100
Sulfur 1
Zinc oxide 5
Stearic acid 1.5
Dibenzothiazyl disulfide (trade(brand)name: altax) 0.5
Dithiodimorpholine 0.7
Coupling agent 1
Silicon-dioxide 38
Isoprene-isobutylene rubber regenerated rubber and zinc oxide, hard ester acid, silicon-dioxide, promotor mix in Banbury mixer, and dump temperature is at 110-120 ℃, and Sulfur is sneaked in mill, and the composition of making based on the isoprene-isobutylene rubber reclaimed rubber is called rubber master batch A.In mill, add various sulfenamide, dithiocarbamate(s) and thiurams vulcanization accelerator as first promotor to rubber master batch A.The processing characteristics of composition and physical and mechanical properties are respectively according to standard GB 9869, GB/T528, GB/T531 test.
Embodiment 1 and comparative example 1:
N-cyclohexyl-2-[4-morpholinodithio base the sulphenamide that adds 2.7 parts in rubber master batch A makes composition B (embodiment 1), goes into 1.5 parts zinc dithiocarbamate in rubber master batch A adds, and makes composition C (comparative example 1), and test result is compared as follows:
| Test event | Embodiment 1 | Comparative example 1 | |
| Meng Shan is 200 rheometers: | ????T10 | ????4′08″ | ????1′42″ |
| ????T90 | ????26′37″ | ????26′11 | |
| Hardness (Shao Er A) | ????86 | ????81 | |
| Tensile strength, MPa | ????10.09 | ????6.89 | |
| Tensile yield, % | ????567 | ????403 | |
| After the 100 ℃ * 72h hot air aging | |||
| Changes in hardness | ????+1 | ????+1 | |
| The tensile strength velocity of variation, % | ????+4.2 | ????+5.01 | |
| Tensile yield velocity of variation % | ????-28.1 | ????-31.24 | |
Embodiment 2 and comparative example 2:
The N that in rubber master batch A, adds 3.8 parts, N-two ring ethyl-2-[4-morpholinodithio sulphenamides make composition D (embodiment 2), add 1.5 parts tetramethyl-thiuram disulfide in rubber master batch A, make composition E (comparative example 2), and test result is compared as follows:
| Test event | Embodiment 2 | Comparative example 2 | |
| Meng Shan is 200 rheometers: | ????T10 | ????4′56″ | ????1′10″ |
| ????T90 | ????27′32″ | ????24′27 | |
| Hardness (Shao Er A) | ????85 | ????83 | |
| Tensile strength, MPa | ????11.01 | ????7.11 | |
| Tensile yield, % | ????585 | ????485 | |
| 100 ℃ * 72h hot air aging | |||
| Changes in hardness | ????+2 | ????+2 | |
| The tensile strength velocity of variation, % | ????+5.2 | ????+5.8 | |
| Tensile yield velocity of variation % | ????-30.1 | ????-38.4 | |
Embodiment 3 and comparative example 3:
The N-oxygen diethylene-2-[4-morpholinodithio sulphenamide that adds 3.2 parts in rubber master batch A makes composition F (embodiment 3), and the above-mentioned tetramethyl-thiuram disulfide that adds 1.5 parts in rubber master batch A makes composition E (comparative example 3), and test result is compared as follows:
| Test event | Embodiment 3 | Comparative example 3 | |
| Meng Shan 200 sulphur becomes instrument: | ????T10 | ????5′18″ | ????1′10″ |
| ????T90 | ????28′24″ | ????24′27 | |
| Hardness (Shao Er A) | ????81 | ????83 | |
| Tensile strength, MPa | ????10.08 | ????7.11 | |
| Tensile yield, % | ????591 | ????485 | |
| After the 100 ℃ * 72h hot air aging | |||
| Changes in hardness | ????+1 | ????+2 | |
| The tensile strength velocity of variation, % | ????+3.2 | ????+5.8 | |
| Pull apart the long velocity of variation % of the rate of stretching | ????-29.6 | ????-38.4 | |
By the test result of the various embodiments described above and comparative example as seen, it is long to adopt the present invention to have a time of scorch (T10), the obvious advantage that tensile strength is high.
Claims (5)
1, a kind of composition based on the isoprene-isobutylene rubber reclaimed rubber adopts Sulfur-promotor vulcanization system, it is characterized in that, with first promotor of sulfenamide type accelerators as vulcanization system.
2, the composition based on the isoprene-isobutylene rubber reclaimed rubber according to claim 1 is characterized in that, the consumption of described sulfenamide type accelerators is 100 weight parts in the isoprene-isobutylene rubber reclaimed rubber, is preferably 1～5 weight part.
3, according to claim 1 or 2 described compositions, it is characterized in that described sulfenamide type accelerators is a N cyclohexyl 2 benzothiazole sulfenamide based on the isoprene-isobutylene rubber reclaimed rubber.
4, the composition based on the isoprene-isobutylene rubber reclaimed rubber according to claim 1 and 2 is characterized in that, described sulfenamide type accelerators is N, N-dicyclohexyl-benzothiazole sulphenamide.
5, the composition based on the isoprene-isobutylene rubber reclaimed rubber according to claim 1 and 2 is characterized in that, described sulfenamide type accelerators is N-oxygen diethylene-2-[4-morpholinodithio sulphenamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116207 CN1263793C (en) | 2003-04-01 | 2003-04-01 | Composition using butyl rubber reclaimed rubber as base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116207 CN1263793C (en) | 2003-04-01 | 2003-04-01 | Composition using butyl rubber reclaimed rubber as base material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1534057A true CN1534057A (en) | 2004-10-06 |
| CN1263793C CN1263793C (en) | 2006-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03116207 Expired - Fee Related CN1263793C (en) | 2003-04-01 | 2003-04-01 | Composition using butyl rubber reclaimed rubber as base material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608037B (en) * | 2008-06-21 | 2011-11-16 | 比亚迪股份有限公司 | Sponge rubber composition and preparation method thereof |
| CN105542328A (en) * | 2015-12-30 | 2016-05-04 | 江苏宝利来斯橡胶有限公司 | Improved butyl rubber and preparation method thereof |
-
2003
- 2003-04-01 CN CN 03116207 patent/CN1263793C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608037B (en) * | 2008-06-21 | 2011-11-16 | 比亚迪股份有限公司 | Sponge rubber composition and preparation method thereof |
| CN105542328A (en) * | 2015-12-30 | 2016-05-04 | 江苏宝利来斯橡胶有限公司 | Improved butyl rubber and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1263793C (en) | 2006-07-12 |
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Granted publication date: 20060712 Termination date: 20100401 |