CN105985455A - Preparation method of low-odor oil-extended styrene-butadiene rubber - Google Patents

Preparation method of low-odor oil-extended styrene-butadiene rubber Download PDF

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CN105985455A
CN105985455A CN201510082106.5A CN201510082106A CN105985455A CN 105985455 A CN105985455 A CN 105985455A CN 201510082106 A CN201510082106 A CN 201510082106A CN 105985455 A CN105985455 A CN 105985455A
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oil
parts
extended styrene
weight
low smell
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CN105985455B (en
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殷兰
庞建勋
孙继德
李永茹
侯军
郭睿达
田原
王松芝
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Petrochina Co Ltd
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Abstract

A preparation method of low-odor oil-extended styrene-butadiene rubber comprises the following steps: (1) firstly, carrying out vacuum and nitrogen replacement on a polymerization kettle, sequentially adding soft water, an emulsifier, an electrolyte solution, a reducing agent, an environment-friendly regulator, styrene, butadiene and isoprene into the polymerization kettle, adding an initiator hydrogen peroxide to p-menthane when the temperature of the polymerization kettle is reduced to below 5 ℃, carrying out a polymerization experiment, and adding a terminator HSD to terminate the reaction when the conversion rate reaches 60% to obtain an oil-filled rubber base glue solution; (2) uniformly mixing the oil-filled gum base glue solution and the oil-filled emulsion, adding the mixture into a dilute sulfuric acid solution, stirring, controlling the temperature to be 55-65 ℃ and the time to be 5-10 minutes, and after condensation, washing and drying to obtain an oil-filled gum finished product.

Description

A kind of oil-extended styrene buadiene rubber preparation method of low smell
Technical field
The invention belongs to synthetic rubber production technical field, particularly to the oil-extended styrene buadiene rubber of a kind of low smell Preparation method.
Background technology
Oil-extended styrene buadiene rubber has good processability, the feature that heat is low, low temperature flexibility is good, is particularly useful for There is during tire tread glue excellent hauling ability and abrasion performance.Emulsion polymerized styrene butadiene rubber can after adding filling oil Plasticity strengthens, is easy to mixing, rubber preparing device ability is also improved.Relative to the elastomeric market price, The price filling oil is relatively low.Therefore, produce oil-extended styrene buadiene rubber and not only increase yield, and reduce Production cost.
Molecular weight regulator is also called chain-transferring agent.In radical-type polymerization course of reaction, poly-in order to control The molecular weight of compound, it is often necessary to add conditioning agent.In polymerization reaction system, conditioning agent is that a class is very alive The material sprinkling.It is easy to react with the macromolecular radical growing, and terminates living chain, with When conditioning agent molecule itself generate again new free radical, the activity of this free radical and macromolecular radical are lived Property same or like, thus can continue cause polymerization.The molecule of polymer can be reduced after adding conditioning agent Amount, does not then have too much influence to polymerization rate.In addition, the radical-type polymerization for alkadienes is anti- For answering process, add conditioning agent, in addition to can controlling molecular weight, polymer molecule can also be reduced On chain 1,2 structures or 1,3 structures, so also just decrease polydiene and occur branched, crosslinked and produce The hidden danger of gel.
Most emulsion polymerizations belong to free radical type reaction.Owing to macromolecular radical is closed in that In this isolated emulsion particle, (or molecular weight is extremely low only to be expanded to initial radical in emulsion particle by aqueous phase Living chain), there is to terminate reaction in free radical chain that could be original with emulsion particle, and in different emulsion particle Free radical then have no chance to collide each other and the possibility of chain termination reaction occurs.Therefore with other freely Fundamental mode polymerization process is compared, and emulsion polymerization chain termination speed is low, and the life-span of macromolecular radical is long, The sufficient time can be had to carry out chain growth, and the molecular weight of the polymer therefore being prepared by emulsion method is than other Polymerization is much bigger.Meanwhile, the polymerisation carrying out in emulsion particle is mostly atactic polymerization, therefore with breast The polymer that liquid method obtains easily contains more 1,2 structures or 1,3 structures.Therefore conditioning agent is added to control The molecular weight of polymer processed and molecular structure just seem more important, for breast for emulsion polymerization process Poly-butadiene-styrene rubber is all the more so for producing.
Many sulfur-bearings, nitrogen, phosphorus, selenium and have the compound of unsaturated bond all can conduct in emulsion polymerisation system Conditioning agent.For the emulsion polymerization process of many monomers, most conditioning agents is applied to be mercaptan, wherein Including positive mercaptan and branched mercaptan, and mercaptan primary, secondary, tertiary all can be applied.Research discovery, uses The carbon number making adjustments in the thiol molecule of agent is generally 5-14.In organic chemistry, mercaptan is to comprise mercapto One class non-aromatic component of base functional group (-SH).The oxygen can regarded as in alcohol is replaced by sulphur, sulfhydryl Or the organic compound that sulfydryl SH is connected with aliphatic group.Sulfydryl be connected to form containing phenol organic matter Compound claims thiophenol.It is present in base oil, be usually with the various mercaptan based on ethyl mercaptan.Additionally, alkene Propanethiol is present in mustard oil, and amino acid, cysteine containing sulfydryl are present in protein.Sulphur Alcohol, thiophenol character similar to alcohol, phenol.Mercaptan and thiophenol have strong stink, and ethyl mercaptan is in atmosphere Concentration reach 50,000,000,000/for the moment, can smell an offensive odor.
The molecular weight regulator that current oil-filled emulsion polymerized styrene butadiene rubber production technology uses is tert-dodecyl mercaptan.Fourth The on-the-spot thiol smell of benzene rubber Workshop Production is dense, unpleasant, and mercaptan is also toxic, operator Member's work under bad environment.Use novel molecular amount conditioning agent to replace mercaptan, the stink of mercaptan can be avoided, this For realize environmental protection, cleaning produce all have very important significance.
Content of the invention
It is an object of the invention to provide a kind of novel tasteless molecular weight regulator and replace mercaptan, both permissible Avoid the stink of mercaptan, the effect same with tert-dodecyl mercaptan during polymerisation, can be reached again, this for Realize that environmental protection, cleaning produce and all have very important significance.
The present invention provides the oil-extended styrene buadiene rubber preparation method of a kind of low smell, comprises the steps:
(1) vacuum, nitrogen displacement are first carried out to polymeric kettle, successively by soft water, emulsifying agent, electrolyte Solution, reducing agent, environment-friendly type conditioning agent, styrene, butadiene, isoprene join in polymeric kettle, When polymeric kettle temperature is down to below 5 DEG C, adds initiator hydrogen peroxide to alkane in the Meng, carry out polymerization experiment, When conversion ratio reaches 60%, add terminator HSD to terminate reaction, obtain oil-filled matrix plinth glue;
(2) oil-filled matrix plinth glue is mixed with filling fat liquor, joins in dilution heat of sulfuric acid, Stirring, temperature controls at 55 DEG C~65 DEG C, and the time is 5~10 minutes, and after cohesion, washing is dried, and obtains Oil-filled glue finished product.
The method have the benefit that
When oil-extended styrene buadiene rubber prepared by novel molecular amount conditioning agent of the present invention, whether polymerization stage, Deaeration stage, blending stage, cohesion washing stage, all there is no obvious peculiar smell, it is achieved that environmental protection produces, Reduce the infringement to operating personnel.
Detailed description of the invention
Hereinafter embodiments of the invention are elaborated: the present embodiment is premised on technical solution of the present invention Under implement, give detailed embodiment and process, but protection scope of the present invention be not limited to following Embodiment, the experimental technique of unreceipted actual conditions in the following example, generally according to normal condition.
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, step (1) comprises Polymeric component and parts by weight are preferably:
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, emulsifying agent is disproportionated rosin Acid potash soap, its parts by weight preferably 4.5 parts.
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, component that electrolyte comprises And parts by weight are preferably: phosphoric acid 0.2~0.3 part, 0.3~0.5 part of potassium hydroxide, ethylenediamine tetra-acetic acid four Sodium salt 0.03 part, neopelex 0.1~0.2 part.
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, component that reducing agent comprises And parts by weight are preferably: 0.01 part of ferrous sulfate, rongalite 0.03~0.05 part, second two Amine tetraacethyl tetrasodium salt 0.025 part.
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, environment-friendly type conditioning agent comprises Component and parts by weight be preferably: 3-isooctyl mercaptopropionate 0.05~0.10 part, 3-mercaptopropionic acid-2- Octyl Nitrite 0.05~0.10 part.
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, fills what fat liquor comprised Component and parts by weight are preferably: PUR softening oil No. 3 21.5~23.5 parts, water 11.7~12.0 parts, isproportionated potassium rosinate 2.8~3.0 parts.
The oil-extended styrene buadiene rubber preparation method of low smell of the present invention, wherein, dilute sulphur in step (2) Acid solution pH value is preferably 3~4.
Embodiment 1:
(1) first carry out vacuum, nitrogen displacement to polymeric kettle.Successively by soft water, emulsifying agent, electrolyte Solution, reducing agent, environment-friendly type conditioning agent, styrene, butadiene, isoprene join in polymeric kettle, When polymeric kettle temperature is down to 5 DEG C, add initiator hydrogen peroxide to alkane in the Meng, carry out polymerization experiment, when turn When rate reaches 60%, add terminator HSD to terminate reaction, obtain oil-filled matrix plinth glue.
(2) by oil-filled matrix plinth glue with fill fat liquor mix, join pH value be 3 dilute In sulfuric acid solution, stirring, temperature controls at 55 DEG C, and the time is 5 minutes, and after cohesion, washing is dried, Obtain oil-filled glue finished product.
Polymeric component and parts by weight that above-mentioned steps (1) comprises are:
Mentioned emulsifier is included as isproportionated potassium rosinate, and its parts by weight are 3.5 parts.
Component and number that above-mentioned electrolyte comprises be:
Component and number that above-mentioned reducing agent comprises be:
0.01 part of ferrous sulfate
Rongalite 0.03 part
Tetrasodium salt of EDTA 0.025 part
Component and number that above-mentioned environment-friendly type conditioning agent comprises be:
3-isooctyl mercaptopropionate 0.05 part
3-mercaptopropionic acid-2-Octyl Nitrite 0.05 part
Component and parts by weight that described filling fat liquor comprises are:
PUR softening oil No. 3 21.5 parts
11.7 parts of water
Isproportionated potassium rosinate 2.8 parts
There is no pungent mercaptan taste in polymerization process, in latex degasification process.Rubber sample Mooney point is 54.
Embodiment 2:
(1) first carry out vacuum, nitrogen displacement to polymeric kettle.Successively by soft water, emulsifying agent, electrolyte Solution, reducing agent, environment-friendly type conditioning agent, styrene, butadiene, isoprene join in polymeric kettle, When polymeric kettle temperature is down to 5 DEG C, add initiator hydrogen peroxide to alkane in the Meng, carry out polymerization experiment, when turn When rate reaches 60%, add terminator HSD to terminate reaction, obtain oil-filled matrix plinth glue.
(2) by oil-filled matrix plinth glue with fill fat liquor mix, join pH value be 4 dilute In sulfuric acid solution, stirring, temperature controls at 65 DEG C, and the time is 10 minutes, and after cohesion, washing is dried, Obtain oil-filled glue finished product.
Polymeric component and parts by weight that above-mentioned steps (1) comprises are:
Mentioned emulsifier is included as isproportionated potassium rosinate, and its parts by weight are 5.0 parts.
Component and number that above-mentioned electrolyte comprises be:
Component and number that above-mentioned reducing agent comprises be:
0.01 part of ferrous sulfate
Rongalite 0.05 part
Tetrasodium salt of EDTA 0.025 part
Component and number that above-mentioned environment-friendly type conditioning agent comprises be:
3-isooctyl mercaptopropionate 0.1 part
3-mercaptopropionic acid-2-Octyl Nitrite 0.1 part
Component and parts by weight that described filling fat liquor comprises are:
PUR softening oil No. 3 23.5 parts
12.0 parts of water
Isproportionated potassium rosinate 3.0 parts
There is no pungent mercaptan taste in polymerization process, in latex degasification process.Rubber sample Mooney point is 44.
Embodiment 3:
(1) first carry out vacuum, nitrogen displacement to polymeric kettle.Successively by soft water, emulsifying agent, electrolyte Solution, reducing agent, environment-friendly type conditioning agent, styrene, butadiene, isoprene join in polymeric kettle, When polymeric kettle temperature is down to 5 DEG C, add initiator hydrogen peroxide to alkane in the Meng, carry out polymerization experiment, when turn When rate reaches 60%, add terminator HSD to terminate reaction, obtain oil-filled matrix plinth glue.
(2) by oil-filled matrix plinth glue with fill fat liquor mix, join pH value be 3.5 dilute In sulfuric acid solution, stirring, temperature controls at 60 DEG C, and the time is 7.5 minutes, and after cohesion, washing is dried, Obtain oil-filled glue finished product.
Polymeric component and parts by weight that above-mentioned steps (1) comprises are:
Mentioned emulsifier is included as isproportionated potassium rosinate, and its parts by weight are 4.2 parts.
Component and number that above-mentioned electrolyte comprises be:
Component and number that above-mentioned reducing agent comprises be:
0.01 part of ferrous sulfate
Rongalite 0.04 part
Tetrasodium salt of EDTA 0.025 part
Component and number that above-mentioned environment-friendly type conditioning agent comprises be:
3-isooctyl mercaptopropionate 0.07 part
3-mercaptopropionic acid-2-Octyl Nitrite 0.08 part
Component and parts by weight that described filling fat liquor comprises are:
PUR softening oil No. 3 22.5 parts
11.9 parts of water
Isproportionated potassium rosinate 2.9 parts
There is no pungent mercaptan taste in polymerization process, in latex degasification process.Rubber sample Mooney point is 49. Comparative example:
(1) first carry out vacuum, nitrogen displacement to polymeric kettle.Successively by soft water, emulsifying agent, electrolyte Solution, reducing agent, tert-dodecyl mercaptan, styrene, butadiene, isoprene join in polymeric kettle, When polymeric kettle temperature is down to 5 DEG C, add initiator hydrogen peroxide to alkane in the Meng, carry out polymerization experiment, when turn When rate reaches 60%, add terminator HSD to terminate reaction, obtain oil-extended styrene buadiene rubber base latex;
(2) oil-extended styrene buadiene rubber base latex and age resistor emulsion are blended uniformly, add concentration to be 0.5% Dilution heat of sulfuric acid in, stirring, temperature controls at 60 DEG C, and the time is 5 minutes, and after cohesion, washing is dry Dry, obtain oil-filled glue finished product.
Polymeric component and parts by weight that above-mentioned steps (1) comprises are:
Described emulsifying agent is isproportionated potassium rosinate, and its parts by weight are 4.5 parts.
Component and parts by weight that described electrolyte comprises are:
Component and parts by weight that described reducing agent comprises are:
0.01 part of ferrous sulfate
Rongalite 0.03 part
Tetrasodium salt of EDTA 0.025 part
Polymerization process has pungent mercaptan taste, latex degasification process also has pungent mercaptan taste.Oil-filled glue Sample Mooney point is 51.
Contrast three embodiments and comparative example, first see the oil-filled glue sample gate of three embodiments and comparative example Buddhist nun's viscosity, all between 44~54, all controls in oil-extended styrene buadiene rubber top grade product indication range, this explanation The low smell environment-friendly type conditioning agent that the present invention uses serves common butadiene-styrene rubber conditioning agent tert-dodecyl mercaptan Effect, may be used for synthesizing oil-extended styrene buadiene rubber.
Secondly, in three embodiment polymerizations and latex degasification process, the mercaptan taste not all being pungent, and In comparative example polymerization and latex degasification process, all there is the mercaptan taste being pungent especially, make us very uncomfortable, say The low smell environment-friendly type conditioning agent that the bright present invention uses decreases in oil-extended styrene buadiene rubber preparation process really Pungent undesirable smell.

Claims (8)

1. an oil-extended styrene buadiene rubber preparation method for low smell, comprises the steps:
(1) vacuum, nitrogen displacement are first carried out to polymeric kettle, successively by soft water, emulsifying agent, electrolyte Solution, reducing agent, environment-friendly type conditioning agent, styrene, butadiene, isoprene join in polymeric kettle, When polymeric kettle temperature is down to below 5 DEG C, adds initiator hydrogen peroxide to alkane in the Meng, carry out polymerization experiment, When conversion ratio reaches 60%, add terminator HSD to terminate reaction, obtain oil-filled matrix plinth glue;
(2) oil-filled matrix plinth glue is mixed with filling fat liquor, joins in dilution heat of sulfuric acid, Stirring, temperature controls at 55 DEG C~65 DEG C, and the time is 5~10 minutes, and after cohesion, washing is dried, and obtains Oil-filled glue finished product.
2. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: Polymeric component and parts by weight that step (1) comprises are:
3. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: Emulsifying agent is isproportionated potassium rosinate, and its parts by weight are 3.5~5.0 parts.
4. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: Component and parts by weight that described electrolyte comprises are: phosphoric acid 0.2~0.3 part, 0.3~0.5 part of potassium hydroxide, Tetrasodium salt of EDTA 0.03 part, neopelex 0.1~0.2 part.
5. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: Component and parts by weight that described reducing agent comprises are: 0.01 part of ferrous sulfate, rongalite 0.03~0.05 part, tetrasodium salt of EDTA 0.025 part.
6. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: Component and parts by weight that described environment-friendly type conditioning agent comprises are: 3-isooctyl mercaptopropionate 0.05~0.10 part, 3-mercaptopropionic acid-2-Octyl Nitrite 0.05~0.10 part.
7. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: Fill the component that comprises of fat liquor and parts by weight are: PUR softening oil No. 3 21.5~23.5 parts, water 11.7~12.0 parts, isproportionated potassium rosinate 2.8~3.0 parts.
8. the oil-extended styrene buadiene rubber preparation method of low smell according to claim 1, it is characterised in that: In step (2), dilution heat of sulfuric acid pH value is 3~4.
CN201510082106.5A 2015-02-15 Preparation method of low-odor oil-extended styrene-butadiene rubber Active CN105985455B (en)

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Cited By (7)

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CN107312125A (en) * 2017-07-14 2017-11-03 合肥市远程胶塑有限公司 A kind of modified oil-extended styrene buadiene rubber formula and its preparation technology
CN107602765A (en) * 2017-09-26 2018-01-19 青岛瑞林材料科技有限公司 A kind of preparation method of oil-filled polydiene rubber
CN108203523A (en) * 2016-12-20 2018-06-26 中国石油天然气股份有限公司 Preparation method of oil-extended styrene-butadiene rubber
CN108203486A (en) * 2016-12-20 2018-06-26 中国石油天然气股份有限公司 Preparation method of environment-friendly oil-extended styrene-butadiene rubber
CN108467523A (en) * 2018-03-09 2018-08-31 杨春花 A kind of high-elasticity thermoplastic resin combination and preparation method thereof
CN109776726A (en) * 2017-11-15 2019-05-21 中国石油天然气股份有限公司 Preparation method of styrene butadiene rubber and styrene butadiene rubber
CN114805686A (en) * 2021-01-19 2022-07-29 中国石油天然气股份有限公司 Oil-extended styrene-butadiene rubber and preparation method thereof

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CN108203523A (en) * 2016-12-20 2018-06-26 中国石油天然气股份有限公司 Preparation method of oil-extended styrene-butadiene rubber
CN108203486A (en) * 2016-12-20 2018-06-26 中国石油天然气股份有限公司 Preparation method of environment-friendly oil-extended styrene-butadiene rubber
CN108203523B (en) * 2016-12-20 2020-04-10 中国石油天然气股份有限公司 Preparation method of oil-extended styrene-butadiene rubber
CN107312125A (en) * 2017-07-14 2017-11-03 合肥市远程胶塑有限公司 A kind of modified oil-extended styrene buadiene rubber formula and its preparation technology
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CN107602765B (en) * 2017-09-26 2019-11-22 青岛瑞林材料科技有限公司 A kind of preparation method of oil-filled polydiene rubber
CN109776726A (en) * 2017-11-15 2019-05-21 中国石油天然气股份有限公司 Preparation method of styrene butadiene rubber and styrene butadiene rubber
CN109776726B (en) * 2017-11-15 2021-11-02 中国石油天然气股份有限公司 Preparation method of styrene butadiene rubber and styrene butadiene rubber
CN108467523A (en) * 2018-03-09 2018-08-31 杨春花 A kind of high-elasticity thermoplastic resin combination and preparation method thereof
CN114805686A (en) * 2021-01-19 2022-07-29 中国石油天然气股份有限公司 Oil-extended styrene-butadiene rubber and preparation method thereof
CN114805686B (en) * 2021-01-19 2024-03-01 中国石油天然气股份有限公司 Oil-extended styrene butadiene rubber and preparation method thereof

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