CN107739423B - MBS resin rubber latex and preparation method thereof - Google Patents
MBS resin rubber latex and preparation method thereof Download PDFInfo
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- CN107739423B CN107739423B CN201711044560.7A CN201711044560A CN107739423B CN 107739423 B CN107739423 B CN 107739423B CN 201711044560 A CN201711044560 A CN 201711044560A CN 107739423 B CN107739423 B CN 107739423B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/14—Treatment of polymer emulsions
- C08F6/16—Purification
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Graft Or Block Polymers (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention belongs to the technical field of plastic toughening agents, and particularly relates to MBS resin rubber latex and a preparation method thereof. The MBS resin rubber latex is prepared from the following raw materials: styrene-butadiene latex, methyl methacrylate, an initiator and deionized water. The production process of the latex adopts a composite emulsification system, and the grain size of SBR is controlled below 80nm to the greatest extent. Before graft polymerization, electrolyte is added into the SBR rubber latex to remove redundant emulsifier in an emulsification system, so that the grafting effect is improved, and the final MBS achieves the effects of high strength, low whitening and high transparency.
Description
Technical Field
The invention belongs to the technical field of plastic toughening agents, and particularly relates to MBS resin rubber latex and a preparation method thereof.
Background
MBS resin is mainly used in PVC industry as a plastic toughening agent, and has higher requirements on the aspects of high transparency, low whitening, high strength and the like of materials along with the continuous upgrade of products at present. In the first step of SBR synthesis process, unreacted emulsifier monomer can affect the particle size of SBR latex, thereby affecting the molecular weight and molecular weight distribution of the final product MBS, and causing MBS to affect the impact resistance, transparency and whitening performance of plastic products, therefore, whether the content of the unreacted emulsifier can be effectively reduced is the key for preparing high-performance MBS.
Disclosure of Invention
The invention aims to provide MBS resin rubber latex which achieves the effects of high strength, low whitening and high transparency; the invention also provides a preparation method of the MBS resin rubber latex, which is scientific, reasonable, simple and easy to implement.
The MBS resin rubber latex is prepared from the following raw materials in parts by weight:
the styrene-butadiene latex is prepared from the following raw materials in parts by weight:
the compound emulsifier is two or more of fatty acid soap, resin soap, sodium lauryl sulfate or sodium dodecyl benzene sulfonate.
The electrolyte salt is one or two of organic acid metal salt or inorganic alkali metal salt.
The initiator is a conventional initiator, a commercially available product.
The preparation method of the MBS resin rubber latex comprises the following steps:
(1) synthesizing styrene-butadiene latex: sequentially adding deionized water, a composite emulsifier and an initiator into a reaction kettle, introducing nitrogen, adding butadiene and styrene, heating for reaction, detecting the particle size, adding electrolyte salt to remove the redundant composite emulsifier to obtain styrene-butadiene latex;
(2) MBS synthesis: and adding deionized water, styrene-butadiene latex, methyl methacrylate and an initiator into the reaction kettle for graft polymerization to obtain the MBS resin.
The reaction temperature in the step (1) is 68-72 ℃.
The particle size in the step (1) is 65-75 nm.
The polymerization temperature in the step (2) is 55-75 ℃.
The polymerization time in the step (2) is 6 to 10 hours.
Compared with the prior art, the invention has the following beneficial effects:
the production process of the latex adopts a composite emulsification system, and the grain size of SBR is controlled below 80nm to the greatest extent. Before graft polymerization, electrolyte is added into the SBR rubber latex to remove redundant emulsifier in an emulsification system, so that the grafting effect is improved, and the final MBS achieves the effects of high strength, low whitening and high transparency.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
The raw materials comprise:
the styrene-butadiene latex comprises the following raw materials in percentage by weight:
the preparation method comprises the following steps:
(1) synthesizing styrene-butadiene latex: sequentially adding deionized water, a composite emulsifier and an initiator into a reaction kettle, introducing nitrogen, adding butadiene and styrene, heating at 68 ℃ for reaction, detecting the particle size, and adding electrolyte salt to remove the redundant composite emulsifier when the particle size is 65-75nm to obtain styrene-butadiene latex;
(2) MBS synthesis: deionized water, styrene-butadiene latex, methyl methacrylate and an initiator are added into a reaction kettle for graft polymerization, the polymerization temperature is 55 ℃, the polymerization time is 6 hours, and the MBS resin with the grafting rate of more than 99 percent is obtained.
Example 2
The raw materials comprise:
the styrene-butadiene latex comprises the following raw materials in percentage by weight:
the preparation method comprises the following steps:
(1) synthesizing styrene-butadiene latex: sequentially adding deionized water, a composite emulsifier and an initiator into a reaction kettle, introducing nitrogen, adding butadiene and styrene, heating at 72 ℃ for reaction, detecting the particle size, and adding electrolyte salt to remove the redundant composite emulsifier when the particle size is 65-75nm to obtain styrene-butadiene latex;
(2) MBS synthesis: deionized water, styrene-butadiene latex, methyl methacrylate and an initiator are added into a reaction kettle for graft polymerization, the polymerization temperature is 75 ℃, the polymerization time is 10 hours, and the MBS resin with the grafting rate of more than 99 percent is obtained.
Example 3
The raw materials comprise:
the styrene-butadiene latex comprises the following raw materials in percentage by weight:
the preparation method comprises the following steps:
(1) synthesizing styrene-butadiene latex: sequentially adding deionized water, a composite emulsifier and an initiator into a reaction kettle, introducing nitrogen, adding butadiene and styrene, heating at 70 ℃ for reaction, detecting the particle size, and adding electrolyte salt to remove the redundant composite emulsifier when the particle size is 65-75nm to obtain styrene-butadiene latex;
(2) MBS synthesis: adding deionized water, styrene-butadiene latex, methyl methacrylate and an initiator into a reaction kettle for graft polymerization at the polymerization temperature of 60 ℃ for 8 hours to obtain the MBS resin with the grafting rate of more than 99%.
Through detection, the composite emulsifier is added, and the redundant emulsifier is removed by electrolyte salt, so that the particle size of the latex can be effectively controlled to be about 80nm, and the MBS resin with high stability is prepared.
Claims (5)
1. The preparation method of the MBS resin rubber latex is characterized by comprising the following raw materials in parts by weight:
60-80 parts of styrene-butadiene latex
20-40 parts of methyl methacrylate
0.1 to 0.5 portion of initiator
200 portions and 300 portions of deionized water
The styrene-butadiene latex is prepared from the following raw materials in parts by weight:
60-65 parts of butadiene
35-40 parts of styrene
0.1 to 0.5 portion of initiator
1-3.5 parts of composite emulsifier
0.2-0.5 part of electrolyte salt
200 portions and 300 portions of deionized water;
wherein: the electrolyte salt is one or two of organic acid metal salt or inorganic alkali metal salt;
the method comprises the following steps:
(1) synthesizing styrene-butadiene latex: sequentially adding deionized water, a composite emulsifier and an initiator into a reaction kettle, introducing nitrogen, adding butadiene and styrene, heating for reaction, detecting the particle size, and adding electrolyte salt to remove the redundant composite emulsifier when the particle size is 65-75nm to obtain styrene-butadiene latex;
(2) MBS synthesis: and adding deionized water, styrene-butadiene latex, methyl methacrylate and an initiator into the reaction kettle for graft polymerization to obtain the MBS resin.
2. The method for preparing MBS resin rubber latex according to claim 1, wherein the compound emulsifier is two or more of fatty acid soap, resin soap, sodium lauryl sulfate or sodium dodecyl benzene sulfonate.
3. The method for preparing MBS resin rubber latex according to claim 1, wherein the reaction temperature in the step (1) is 68-72 ℃.
4. The method for preparing MBS resin rubber latex as claimed in claim 1, wherein the polymerization temperature in the step (2) is 55-75 ℃.
5. The method for preparing MBS resin rubber latex as claimed in claim 1, wherein the polymerization time in the step (2) is 6 to 10 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711044560.7A CN107739423B (en) | 2017-10-31 | 2017-10-31 | MBS resin rubber latex and preparation method thereof |
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| CN201711044560.7A CN107739423B (en) | 2017-10-31 | 2017-10-31 | MBS resin rubber latex and preparation method thereof |
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| CN107739423A CN107739423A (en) | 2018-02-27 |
| CN107739423B true CN107739423B (en) | 2020-04-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418229A (en) * | 2000-03-23 | 2003-05-14 | 钟渊化学工业株式会社 | Process for producing graft copolymer latex |
| CN101139425A (en) * | 2006-09-05 | 2008-03-12 | 中国石油天然气集团公司 | Method for synthesizing polyvinyl chloride modifier |
| CN101191004A (en) * | 2006-11-18 | 2008-06-04 | 沂源瑞丰高分子材料有限公司 | High transparent stressing-whitening resisting MBS resin composition |
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2017
- 2017-10-31 CN CN201711044560.7A patent/CN107739423B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418229A (en) * | 2000-03-23 | 2003-05-14 | 钟渊化学工业株式会社 | Process for producing graft copolymer latex |
| CN101139425A (en) * | 2006-09-05 | 2008-03-12 | 中国石油天然气集团公司 | Method for synthesizing polyvinyl chloride modifier |
| CN101191004A (en) * | 2006-11-18 | 2008-06-04 | 沂源瑞丰高分子材料有限公司 | High transparent stressing-whitening resisting MBS resin composition |
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Denomination of invention: MBS resin rubber latex and its preparation method Effective date of registration: 20211216 Granted publication date: 20200414 Pledgee: Yiyuan sub branch of industrial and Commercial Bank of China Ltd. Pledgor: SHANDONG RUIFENG CHEMICAL Co.,Ltd. Registration number: Y2021980015182 |
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