CN1015629B - Reproduced rubber/polythene thermoplastic elastomer and its preparing process - Google Patents
Reproduced rubber/polythene thermoplastic elastomer and its preparing processInfo
- Publication number
- CN1015629B CN1015629B CN 88101416 CN88101416A CN1015629B CN 1015629 B CN1015629 B CN 1015629B CN 88101416 CN88101416 CN 88101416 CN 88101416 A CN88101416 A CN 88101416A CN 1015629 B CN1015629 B CN 1015629B
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- Prior art keywords
- rubber
- consumption
- reclaimed rubber
- reclaimed
- master batch
- Prior art date
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Abstract
The present invention relates to a thermoplastic elastomer made from regenerated rubber used as the rubber phase and polyethylene which are commonly mixed and dynamically and fully vulcanized, wherein the regenerated rubber is made from waste rubber. The elastomer has the advantages of simple making methods and low cost, has the performance of the ordinary rubber elastomer, and can be processed by thermoplastic plastic processing apparatus. Compared with the processing course of an ordinary rubber product, the present invention has the advantages that the production period is shortened, the apparatus investment is reduced, the energy is saved and the labor productivity is improved. The elastomer is particularly suitable for producing ordinary rubber products which are formed by extrusion, mould pressing and injection moulding, etc., and can meet the requirement of various relevant performance indexes.
Description
The present invention relates to a kind of employing dynamic vulcanization process and make the full sulfurized reclaimed rubber/new LDPE (film grade) of rubber phase (RR/LDPE) blending thermoplastic elastomer and preparation method thereof.
In U.S. Pat 4130535, disclose a kind of employing dynamic vulcanization process and made the ethylene propylene/polypropene blended thermoplastic elastomer of the full sulfurized of rubber phase.Because adopting Sulfur in this patent rubber phase is linking agent, so contains free sulfur in the products obtained therefrom, and metallic substance such as copper are had corrosive nature, has limited its application in cable industry.And Chinese Academy of Sciences's application number is a disclosed method in 8510222 the patent application prospectus, at the problems referred to above, the rubber phase linking agent is used instead dicumyl peroxide and diamyl methyne tetrathio thiuram, and the material that makes has overcome the Corrosion of Metallic Materials problem.The weak point of above-mentioned two patents is that all to have adopted the higher terpolymer EP rubber of price be rubber phase, makes the price of this material higher more than 30% than natural rubber or styrene-butadiene rubber(SBR).Thereby limited applying of this material, particularly limited its application on general rubber product.People have carried out extensive studies to various rubber/plastic blend thermoplastic elastomer so far, but the relevant report for preparing thermoplastic elastomer with reclaimed rubber/plastic blend of the domestic and international public publication of Shang Weijian, through Guangdong Province's scientific information research institute online information retrieval center finding CHEMASS (file 399 1967～1987 years), (file 350,351 for the world patent document; 1963～1987 years) all find no and close record.
The objective of the invention is to avoid above-mentioned weak point of the prior art and providing a kind of inexpensive reclaimed rubber that adopts waste vulcanized glue and scrap stock processing to make to replace ordinary rubber is rubber phase and new LDPE (film grade), makes a kind of blend thermoplastic elastomer through dynamic vulcanization.
Purpose of the present invention reaches by following measure:
A kind of reclaimed rubber/rubber/polythene thermoplastic elastomer is characterised in that the Synergist S-421 95 of preparation reclaimed rubber rubber master batch is made up of sulfuration promotion system and preventing aging system.And realizing that full sulfurized sulfuration promotion system is made up of Sulfur, 2-benzothiazolyl mercaptan, tetramethyl-thiuram disulfide, zinc oxide and stearic acid, sulphur dosage is 0.2～2.0 part (in reclaimed rubber 100 mass parts, as follows); 0.4～1.0 part of 2-benzothiazolyl mercaptan consumption; The tetramethyl-thiuram disulfide consumption is 0～0.5 part; Zinc oxide dosage is 2.0～5.0 parts; Stearic acid dosage is 0.5～1.0 part.Preventing aging system is made up of CPPD N cyclohexyl N (being antioxidant 4010) and 2 mercapto benzimidazole (being antioxidant MB), and its consumption is 0.3～1.0 part.
The preparation method of reclaimed rubber/rubber/polythene thermoplastic elastomer comprises preparation and two steps of reclaimed rubber rubber master batch and polyethylene mixing dynamic vulcanization of reclaimed rubber rubber master batch, and the equipment of implementing above two steps is closed refining glue (moulding) machine or open refining glue (moulding) machine.First step is the preparation of reclaimed rubber rubber master batch.After treating that closed (open) refining glue (moulding) machine starts, add reclaimed rubber, it is mixing to add various Synergist S-421 95s then, can keep mixing service temperature at 20 ℃～100 ℃ by register, 3～5 minutes operating times.Second step is: reclaimed rubber rubber master batch and polyethylene blend dynamic vulcanization.Closed (open) refining glue (moulding) machine is warmed up in 130 ℃～160 ℃ the scope, starts and add the reclaimed rubber rubber master batch again after the back adds new LDPE (film grade), fusion.Its rubber/mould than being 60/40～90/10, all even dynamic vulcanization process of blend remains on 130 ℃～160 ℃ scopes from start to finish, and the operating time is 5～25 minutes.Following sheet cooling (or sending the dicing machine pelletizing) is stand-by.
Reclaimed rubber that the present invention created and polyolefin resin blend thermoplastic elastomer have the caoutchouc elasticity volume property under the normal temperature working conditions, heat available general thermoplastics processing units and process, as extrude, mold pressing or injection molding etc.Its salient features is as follows: tensile strength 4～7.5MPA, tensile yield 200～400%, setafter break 8～70%, hardness (Shao A) 60～85 degree, tear strength 20～50,000 N ton/rice.
The invention will be further described below in conjunction with embodiment:
Embodiment one: refine the production of glue (moulding) machine with closed
1. the preparation of reclaimed rubber rubber master batch
After closed refined glue (moulding) machine and start, add reclaimed rubber, add 5.0 parts in zinc oxide (, as follows), 1.0 parts of stearic acid, N-cyclohexyl-N '-phenyl after a while 1.0 parts of 1.0 parts in benzene two glue and 2 mercapto benzimidazoles in reclaimed rubber 100 weight parts; Add 1.0 parts of 2-benzothiazolyl mercaptans then, 0.1 part of tetramethyl-thiuram disulfide is mixing, processing condition: service temperature is 40 ℃～90 ℃, and the operating time is 3～5 minutes.Mixing evenly after, enter the tabletting machine cooling and add again and be the reclaimed rubber rubber master batch after 2.0 parts of Sulfurs are mixed and can descend sheet stand-by.
2. reclaimed rubber rubber master batch and polyethylene blend dynamic vulcanization
Closed is refined glue (moulding) machine be warmed up to 140 ℃, add the reclaimed rubber rubber master batch again after adding new LDPE (film grade), the fusion after starting.All the operating time of even dynamic vulcanization is 10 minutes for reclaimed rubber/poly weight ratio 80/20, blend.Enter under the tabletting machine sheet cooling or send the dicing machine pelletizing stand-by.
Embodiment two: with the production of open refining glue (moulding) machine
1. the preparation of reclaimed rubber rubber master batch
Add 1.0 parts of 5.0 parts in zinc oxide (as follows) stearic acid successively after starting opening rubber mixing machine, adding reclaimed rubber bag roller in reclaimed rubber 100 weight parts, 1.0 parts of CPPD N cyclohexyl Ns and 1.0 parts of mixing 1.0 parts of 2-benzothiazolyl mercaptans, 0.1 part of tetramethyl-thiuram disulfides of adding evenly, then of 2 mercapto benzimidazole, sheet is stand-by down for 2 parts of mixing even backs of Sulfur.Service temperature is that 30 ℃～70 ℃, operating time are 3～5 minutes.
2. reclaimed rubber rubber master batch and polyethylene blend dynamic vulcanization
Open type plastic purificating set is warmed up to 130 ℃; machine and add reclaimed rubber rubber master batch blend dynamic vulcanization again after the back adds new LDPE (film grade), fusion; reclaimed rubber/poly weight ratio 60/40; service temperature is 130 ℃～140 ℃; operating time is 20 minutes, descends the sheet cooling then or send the dicing machine pelletizing stand-by.
The present invention has following advantage compared to existing technology:
1. the present invention's reclaimed rubber rubber master batch of adopting waste rubber goods to make is rubber phase, thereby has and become useless in calmly, special economic benefit and social benefit with low cost, and its cost is about 1/2～1/3 of like product.
2. curing temperature of the present invention obviously reduces, and not only effectively cuts down the consumption of energy, and is applicable to the blend dynamic vulcanization of unsaturated rubber (such as the reclaimed rubber of natural rubber or other waste vulcanized glue).
3. because the present invention has obvious technology, economic traits, therefore can be widely used in making auto parts, flexible pipe, door and window strip of paper used for sealing and other non-tire rubber goodses.
4. method is simple, has saved equipment investment, has shortened the production cycle. Operating flexibility is big, as long as operating condition is adjusted slightly just applicable to different formula combination.
Claims (2)
1, a kind of reclaimed rubber/rubber/polythene thermoplastic elastomer is characterized in that:
(1) its rubber/mould weight ratio is 60/40～90/10;
(2) Synergist S-421 95 of preparation reclaimed rubber rubber master batch is made up of sulfuration promotion system and preventing aging system;
A) sulfuration promotion system composition and consumption are as follows:
Sulfur-consumption is 0.2～2.0 part (reclaimed rubber 100 weight part meters, as follows);
2-benzothiazolyl mercaptan-consumption is 0.4～1.0 part;
Tetramethyl-thiuram disulfide-consumption is 0～0.5 part;
Zinc oxide-consumption is 2.0～5.0 parts;
Stearic acid-consumption is 0.5～1.0 part;
B) preventing aging system is made up of N-cyclohexyl-N '-diphenyl-para-phenylene diamine (being antioxidant 4010) and 2 mercapto benzimidazole (being antioxidant MB), and its consumption is 0.3～1.0 part (in reclaimed rubber 100 weight parts).
2, refine glue (moulding) machine and the machine-processed method that is equipped with reclaimed rubber/rubber/polythene thermoplastic elastomer of open refining glue (moulding) with closed, it is characterized in that: preparation process comprises preparation and two steps of reclaimed rubber rubber master batch and polyethylene mixing dynamic vulcanization of reclaimed rubber rubber master batch, the processing condition of preparation reclaimed rubber rubber master batch are: service temperature is 20 ℃～100 ℃, and the operating time is 3～5 minutes; The processing condition of dynamic vulcanization are: 130 ℃-160 ℃ of service temperatures, the operating time is 5～25 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101416 CN1015629B (en) | 1988-03-17 | 1988-03-17 | Reproduced rubber/polythene thermoplastic elastomer and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101416 CN1015629B (en) | 1988-03-17 | 1988-03-17 | Reproduced rubber/polythene thermoplastic elastomer and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88101416A CN88101416A (en) | 1988-11-09 |
| CN1015629B true CN1015629B (en) | 1992-02-26 |
Family
ID=4831739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88101416 Expired CN1015629B (en) | 1988-03-17 | 1988-03-17 | Reproduced rubber/polythene thermoplastic elastomer and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015629B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003040221A1 (en) * | 2001-11-08 | 2003-05-15 | Shin-Min Chen | Rubber composition and preparing method thereof |
| AU2003277921A1 (en) * | 2003-09-30 | 2005-05-11 | Pirelli And C. S.P.A. | Cable with a coating layer made from a waste material |
| CN101890764B (en) * | 2010-05-28 | 2013-07-03 | 广州华工百川科技股份有限公司 | Method for preparing thermoplastic vulcanized rubber |
| CN105881946A (en) * | 2016-03-03 | 2016-08-24 | 柳州永旺科技有限公司 | Tire molding process of grain threshing machinery |
| CN105856604A (en) * | 2016-03-03 | 2016-08-17 | 柳州永旺科技有限公司 | Grain harvester tire molding process |
| CN114085441A (en) * | 2021-11-30 | 2022-02-25 | 江苏宝利国际投资股份有限公司 | Micro-nano regenerated gum base thermoplastic elastomer and preparation method thereof |
-
1988
- 1988-03-17 CN CN 88101416 patent/CN1015629B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN88101416A (en) | 1988-11-09 |
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