CN113024728B - Polybutadiene latex and preparation method thereof, and ABS resin - Google Patents
Polybutadiene latex and preparation method thereof, and ABS resin Download PDFInfo
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- CN113024728B CN113024728B CN202110258928.XA CN202110258928A CN113024728B CN 113024728 B CN113024728 B CN 113024728B CN 202110258928 A CN202110258928 A CN 202110258928A CN 113024728 B CN113024728 B CN 113024728B
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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
- C08F236/06—Butadiene
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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
- C08F236/12—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 nitriles
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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
- C08F279/04—Vinyl aromatic monomers and nitriles as the only monomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
Abstract
A method of preparing a polybutadiene latex, comprising the steps of: adding a fluorine-containing monomer, a polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃), butadiene, an initiator, an electrolyte, an emulsifier, a chain transfer agent and water into a reactor, and heating to 55-90 ℃ for polymerization; when the conversion rate of butadiene is more than or equal to 60% and less than or equal to 70%, adding a (methyl) acrylate monomer with a side chain containing a nonpolar cyclic structure for copolymerization reaction, and obtaining polybutadiene latex when the conversion rate of butadiene is more than or equal to 98%. The polybutadiene latex has easy slippage of internal molecular chains, and has higher grafting rate when used for ABS grafting reaction. The ABS resin synthesized by the polybutadiene latex prepared by the method can improve the impact resistance of the ABS resin, and the impact strength of the ABS resin reaches more than 400J/m.
Description
Technical Field
The invention belongs to the field of polymers, and particularly relates to a preparation method of polybutadiene latex, the polybutadiene latex prepared by the preparation method, and ABS resin prepared by the polybutadiene latex.
Background
The ABS resin is one of five engineering plastics, has excellent comprehensive properties of good impact resistance, high surface hardness, stable dimension, good chemical resistance and electrical property, easy molding, easy machining and the like, and is widely applied to various aspects such as vehicle and ship, airplane manufacturing, constructional engineering, electrical appliance parts, office file supplies, medical appliances and the like.
ABS resins are derived from the terpolymerization of butadiene, styrene and acrylonitrile and have a complex two-phase structure, namely a dispersed rubber phase and a continuous styrene and acrylonitrile copolymeric matrix resin phase (SAN resin). The impact resistance of the ABS resin is that the polybutadiene phase in the resin can be used as a stress concentration point, and the impact strength of the resin is improved by absorbing stress in modes of deformation, silver line initiation, cavitation induction and the like. In order to provide good compatibility between the polybutadiene rubber phase and the matrix resin phase during blending extrusion, a copolymer of styrene and acrylonitrile is usually grafted to the polybutadiene rubber phase. Therefore, the structure of the polybutadiene latex and the grafting efficiency of the graft resin thereof are critical to determine the impact strength of the ABS resin.
Patent application CN11064298A discloses a method for preparing polydiene latex for preparing ABS resin, which utilizes core-shell type small particle size polydiene latex to perform weak acid agglomeration to prepare large particle size polydiene latex, and small particle size polymer particles are dispersed in the latex particles, so as to simultaneously improve the toughness and rigidity of ABS resin. Although the method preferentially prepares small-particle-size polymer particles in the polybutadiene latex and achieves the effect of improving the toughness and the rigidity of the ABS resin by optimizing the structure of the polybutylene latex, the grafting reaction of a rubber phase cannot be optimized, so that the effect has certain limitation.
Patent application CN110914319A discloses a method for preparing an ABS graft copolymer and a method for preparing a thermoplastic resin composition comprising the same by grafting a part of the total amount of vinyl aromatic compounds to be grafted and a part of the total amount of vinyl cyanide compounds to be grafted onto a small-diameter rubber latex in advance, and then performing an increase in the particle size of the small-diameter rubber latex by adding a certain amount of a polymer coagulant, thereby improving stability, productivity and impact resistance. Although this method can improve the graft effect of the small particle size rubber latex, when the small particle size rubber latex is coagulated with a polymer coagulant to increase the particle size, the small particle size rubber latex particles having a low rigidity are difficult to coagulate because the small particle size rubber latex particles are graft-coated with a vinyl aromatic compound and vinyl cyanide having a high rigidity in advance.
Patent application CN102532786A discloses a polybutadiene latex with bimodal distribution and an ABS resin prepared from the polybutadiene latex, wherein the polybutadiene latex with bimodal distribution and the ABS resin are prepared by mixing latex with large particle size and super large particle size in proportion, then carrying out grafting reaction, coagulating, filtering, drying, blending with SAN, extruding and granulating to obtain the ABS resin. Although the method adopts polybutadiene latex mixed with different particle sizes to prepare the ABS resin and improves the impact resistance of the ABS resin by adjusting the particle size distribution of rubber, the polybutadiene latex with large particle size and super large particle size needs to be prepared respectively, and the preparation process is complex.
Therefore, there is a need for preparing a polybutadiene latex having a particle structure controlled by a simple process, which can provide good impact resistance when used for preparing an ABS resin.
Disclosure of Invention
The invention aims to provide polybutadiene latex and a preparation method thereof, wherein the molecular chains in the polybutadiene latex are easy to slip, and the polybutadiene latex has higher grafting rate when used for ABS grafting reaction.
The invention also aims to provide an ABS resin, which is synthesized by the polybutadiene latex prepared by the method of the invention, and can improve the impact resistance of the ABS resin, and the impact strength of the ABS resin reaches more than 400J/m.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
in a first aspect, the present invention provides a process for the preparation of a polybutadiene latex, comprising the steps of:
adding a fluorine-containing monomer, a polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃), butadiene, an initiator, an electrolyte, an emulsifier, a chain transfer agent and water into a reactor, and heating to 55-90 ℃ for polymerization; when the conversion rate of butadiene is more than or equal to 60% and less than or equal to 70%, adding a (methyl) acrylate monomer with a side chain containing a nonpolar cyclic structure for copolymerization reaction, and obtaining polybutadiene latex when the conversion rate of butadiene is more than or equal to 98%.
As a preferred embodiment, a method for preparing a polybutadiene latex comprises the following steps:
respectively taking 4-8 parts (preferably 5-7 parts) of fluorine-containing monomer, 3-7 parts (preferably 4-6 parts) of polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃), 90-100 parts (preferably 93-97 parts) of butadiene, 2-5 parts (preferably 3-4 parts) of initiator, 3-7 parts (preferably 4-6 parts) of electrolyte, 3-6 parts (preferably 4-5 parts) of emulsifier, 0.5-2 parts (preferably 1-1.5 parts) of chain transfer agent and 90-200 parts (preferably 120-170 parts) of water by weight, adding the components into a reactor, uniformly mixing, heating to 55-90 ℃, preferably 60-85 ℃ to perform polymerization reaction; when the conversion rate of butadiene is more than or equal to 60% and less than or equal to 70%, adding 5-9 parts (preferably 6-8 parts) of (methyl) acrylate monomer with a side chain containing a nonpolar cyclic structure for copolymerization reaction, and obtaining polybutadiene latex when the conversion rate of butadiene is more than or equal to 98%.
In the invention, the fluorine-containing monomer is at least one selected from trifluoroethyl acrylate, hexafluorobutyl acrylate, dodecafluoroheptyl acrylate, perfluorohexyl ethyl acrylate, perfluorooctyl ethyl acrylate and perfluorodecyl ethyl acrylate.
In the invention, the polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃) is at least one of methyl acrylate, itaconic acid and acrylonitrile.
In the present invention, the initiator is a water-soluble peroxide initiator, preferably at least one of sodium persulfate, potassium persulfate, and ammonium persulfate.
In the present invention, the electrolyte is at least one selected from sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, and potassium hydroxide.
In the invention, the emulsifier is at least one selected from sodium naphthalene sulfonate formaldehyde condensate, potassium oleate, disproportionated potassium rosinate and sodium dodecyl benzene sulfonate.
In the invention, the chain transfer agent is at least one of tert-dodecyl mercaptan, n-dodecyl mercaptan and alpha-methyl styrene dimer.
In the present invention, the (meth) acrylate monomer having a nonpolar cyclic structure in a side chain is at least one of isobornyl methacrylate, cyclohexyl (meth) acrylate, and styrene-2-methacrylate.
In the method, the polybutadiene latex introduces fluorine-containing monomer for copolymerization in the preparation process, the fluorine-containing polymer chain segment has the characteristic of low surface tension, so that the polymer molecular chains can slide more easily, and when the ABS resin prepared by the method is impacted, the polybutadiene rubber phase is more easily deformed to cause crazing and form cavitations due to the sliding action of the fluorine-containing chain segment, so that the impact strength of the ABS resin is improved.
In addition, the polybutadiene latex can cause styrene to react with butadiene more easily in the grafting reaction due to the similar compatibility of butadiene and styrene during grafting, so that the graft shell polymer deviates from the copolymerization ratio of styrene and acrylonitrile, which causes poor compatibility when the polybutadiene latex is blended with SAN matrix resin and extruded to prepare ABS resin, thereby reducing the impact strength of the ABS resin. In the invention, polar monomer with solubility of 50-80g/L (solubility in water at 20 ℃) is added in the process of preparing polybutadiene latex for copolymerization reaction, the polarity of the polar monomer is similar to that of acrylonitrile in the grafted SAN resin, and the polar monomer has good similar compatibility, thereby improving the diffusion of the acrylonitrile to latex particles in the grafting reaction, and leading the polymer of a grafting shell layer to be closer to the copolymerization ratio of styrene and acrylonitrile. Meanwhile, when the conversion rate of butadiene is 60-70%, a (methyl) acrylate monomer with a side chain containing a nonpolar cyclic structure is added for copolymerization, the nonpolar of the monomer side group can be well compatible with a polybutadiene chain segment, so that the unreacted butadiene monomer in the latex particle can migrate to the outer layer, and the cyclic structure of the polymerized monomer enables certain gaps to be generated between polymer high molecular chain segments, so that styrene and acrylonitrile can be favorably diffused to polybutadiene latex. Under the synergistic effect, the grafting efficiency of the grafting reaction is increased, so that the grafted latex particles and the SAN resin matrix have better compatibility, and the impact resistance effect of the ABS resin is improved.
In a second aspect, the present invention provides an ABS resin prepared using the polybutadiene latex prepared by the process of the present invention.
In the invention, the prepared polybutadiene latex is grafted, coagulated, dehydrated and dried to obtain ABS rubber powder, and then the ABS rubber powder is mixed with SAN resin and granulated to obtain ABS resin, and the ABS resin is subjected to injection molding to obtain a test sample. The specific operation details can be carried out by referring to the method involved in "production practice and application of ABS resin" written by Songtaihui et al, and are not described herein again.
The invention has the beneficial effects that:
in the invention, in the process of preparing polybutadiene latex, a fluorine-containing monomer and a monomer with similar polarity to acrylonitrile are added for copolymerization, and a (methyl) acrylate monomer with a side chain containing a nonpolar cyclic structure is added for copolymerization reaction in the later period of polymerization, so that the graft SAN is closer to the copolymerization ratio of styrene and acrylonitrile and the grafting efficiency is higher by 50-90 percent through synergistic action, thereby improving the impact strength of the prepared ABS resin, wherein the impact strength is more than 400J/m.
Detailed Description
In order to better understand the technical solution of the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
If the source information of the raw materials in the following examples and comparative examples of the present invention is not specifically described, the raw materials used in the examples or comparative examples are commercially available;
mechanical properties: notched Izod impact 23 ℃ ASTM D256.
The method for testing the residual monomer of butadiene in the latex comprises the following steps: a sample of 0.1g was taken in a 20ml headspace bottle, diluted to 2g with DMF and analyzed by PE Turbomatrix 40 headspace sampler and Shimadzu GC 2010 gas chromatograph to determine the residual butadiene monomer content.
Chromatographic analysis conditions: the fused silica capillary column has a fixed phase of RTX-200 ((35% -trifluoropropyl) -methyl polysiloxane), a column length of 60mm, a column inner diameter of 0.32mm and a liquid film thickness of 1 mu m; the flow rate of nitrogen as carrier gas and carrier gas is 1.5 mL/min; maintaining the initial temperature of the chromatographic column at 50 deg.C for 2min, heating to 80 deg.C at 5 deg.C/min, heating to 240 deg.C at 15 deg.C/min, and maintaining for 6 min; the temperature of the gasification chamber is 200 ℃, the temperature of the detector is 240 ℃, the split ratio is 10:1, and the flow rate of hydrogen is 30 mL/min.
The method for testing the grafting efficiency of the grafted latex comprises the following steps: weighing 2g of ABS rubber powder m, placing the ABS rubber powder m in a Kjeldahl flask, adding 100ml of acetone along the bottleneck, installing a condensing tube on the flask, and refluxing for 2 hours in a constant-temperature water bath at 65 ℃. The flask was taken off and cooled to room temperature. The flask contents were transferred to a centrifuge tube and centrifuged at 15000rpm for 20 minutes to remove the supernatant. The centrifuge tube was placed in a vacuum oven and dried at 65 ℃ to constant weight, the sample mass was recorded as m1, and the mass fraction of polybutadiene rubber in the graft formulation to the total solids in the formulation was recorded as m 2.
Example 1
Respectively adding 4g of perfluorohexyl ethyl acrylate, 3g of methyl acrylate, 100g of butadiene, 2g of potassium persulfate, 2g of ammonium persulfate, 4g of potassium carbonate, 3g of potassium hydroxide, 1g of sodium naphthalene sulfonate formaldehyde condensate, 2g of sodium dodecyl benzene sulfonate, 0.5g of n-dodecyl mercaptan and 196g of water into a reactor, uniformly mixing, and heating to 85 ℃ for polymerization reaction; according to the calculation of chromatographic analysis, when the conversion rate of butadiene is 69.6%, 4g of cyclohexyl methacrylate is added for copolymerization reaction, and polybutadiene latex is obtained when the conversion rate of butadiene is 98.3%.
The differences between examples 2-5 and example 1 are shown in Table 1, and the remaining raw materials, experimental conditions and reaction steps are the same as those of example 1.
TABLE 1 differences between examples 2-5 and example 1
Comparative example 1
The preparation process of the polybutadiene latex of this comparative example includes the following steps:
respectively taking 100g of butadiene, 2g of potassium persulfate, 2g of ammonium persulfate, 4g of potassium carbonate, 3g of potassium hydroxide, 1g of sodium salt of a naphthalene sulfonic acid formaldehyde condensate, 2g of sodium dodecyl benzene sulfonate, 0.5g of n-dodecyl mercaptan and 196g of water, adding the materials into a reactor, uniformly mixing, heating to 85 ℃ for polymerization reaction, and obtaining the polybutadiene latex when the butadiene conversion rate is 98.5%.
Comparative example 2
Respectively adding 4g of perfluorohexyl ethyl acrylate, 3g of methyl acrylate, 100g of butadiene, 2g of potassium persulfate, 2g of ammonium persulfate, 4g of potassium carbonate, 3g of potassium hydroxide, 1g of sodium naphthalene sulfonate formaldehyde condensate, 2g of sodium dodecyl benzene sulfonate, 0.5g of n-dodecyl mercaptan and 196g of water into a reactor, uniformly mixing, and heating to 85 ℃ for polymerization reaction; according to the chromatographic analysis, when the butadiene conversion rate is 57.2 percent, 4g of cyclohexyl methacrylate is added for copolymerization reaction, and polybutadiene latex is obtained when the butadiene conversion rate is 98.3 percent.
Comparative example 3
Respectively adding 4g of perfluorohexyl ethyl acrylate, 3g of methyl acrylate, 100g of butadiene, 2g of potassium persulfate, 2g of ammonium persulfate, 4g of potassium carbonate, 3g of potassium hydroxide, 1g of sodium naphthalene sulfonate formaldehyde condensate, 2g of sodium dodecyl benzene sulfonate, 0.5g of n-dodecyl mercaptan and 196g of water into a reactor, uniformly mixing, and heating to 85 ℃ for polymerization reaction; according to the calculation of chromatographic analysis, when the conversion rate of butadiene is 75.3%, 4g of cyclohexyl methacrylate is added for copolymerization reaction, and polybutadiene latex is obtained when the conversion rate of butadiene is 98.3%.
Preparation and performance detection of ABS resin
The polybutadiene latex is grafted, coagulated, dehydrated and dried to obtain polymer rubber powder, and then the polymer rubber powder is mixed with SAN resin and granulated to obtain ABS resin, and the specific operation can refer to ABS resin production practice and application written by Songtain et al.
The invention prepares ABS resin according to the following method: 120g (based on the weight of the polybutadiene rubber) of the polybutadiene latexes of examples 1-5 and comparative examples 1-3 was charged into a reaction vessel, and FeSO was added to the reaction vessel 4 0.003g of the mixture is uniformly stirred, the reaction kettle is heated to 67 ℃, 0.5g of cumene hydroperoxide, 20g of acrylonitrile, 60g of styrene, 0.3g of tert-dodecyl mercaptan, 1g of disproportionated potassium rosinate and 35g of deionized water are added, the mixture is continuously dripped for 2 hours, and the reaction is continued for 5 hours after the addition of the materials is finished, so that the graft latex is obtained. 200g of the graft latex obtained above was put into a coagulation reactor, stirred and heated to 75 ℃ to which 90g of 10% MgSO was gradually added 4 Adding the aqueous solution for 2h, heating to 95 deg.C, maintaining for 2h, filtering the obtained coagulated latex with 325 mesh screen, and drying with fluidized bed dryer at 60 deg.C for 6h to obtain water content<1% of graft powder. Adopting a double-screw extruder, taking Qimei PN118 as a mixed SAN phase at 180-220 ℃, mixing and extruding the mixed SAN phase with SAN-327 resin according to the polybutadiene rubber content of 17%, cooling and granulating to obtain the ABS resin.
Graft powders prepared from the polybutadiene latexes of examples 1-5 and comparative example were respectively subjected to a grafting efficiency test, and ABS resins prepared from the polybutadiene latexes of examples 1-5 and comparative example were dried in an oven at 80 ℃ for 5 hours and then subjected to a mechanical property test, and the specific test results are shown in Table 2.
TABLE 2 grafting efficiency and mechanical Properties testing
As can be seen from the results of the graft efficiency and mechanical property tests of the ABS rubber powder and the ABS resin prepared from the polybutadiene latexes obtained in examples 1-5 and the comparative example, the ABS rubber powder and the ABS resin prepared from the polybutadiene latexes prepared by the invention have higher graft efficiency and better impact strength than the comparative example.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A method for preparing polybutadiene latex, which is characterized by comprising the following steps:
adding a fluorine-containing monomer, a polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃), butadiene, an initiator, an electrolyte, an emulsifier, a chain transfer agent and water into a reactor, and heating to 55-90 ℃ for polymerization; when the conversion rate of butadiene is more than or equal to 60% and less than or equal to 70%, adding a (methyl) acrylate monomer with a side chain containing a nonpolar cyclic structure for copolymerization reaction, and obtaining polybutadiene latex when the conversion rate of butadiene is more than or equal to 98%; the dosage of each component is as follows: 4-8 parts of fluorine-containing monomer, 3-7 parts of polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃), 90-100 parts of butadiene, 2-5 parts of initiator, 3-7 parts of electrolyte, 3-6 parts of emulsifier, 0.5-2 parts of chain transfer agent, 90-200 parts of water and 5-9 parts of (methyl) acrylate monomer with a side chain containing a nonpolar annular structure; the polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃) is at least one of methyl acrylate, itaconic acid and acrylonitrile.
2. The method of claim 1, wherein the components are used in amounts of: the high-performance fluorine-containing acrylic acid-butadiene copolymer comprises, by weight, 5-7 parts of a fluorine-containing monomer, 4-6 parts of a polar monomer with the solubility of 50-80g/L (the solubility in water at 20 ℃), 93-97 parts of butadiene, 3-4 parts of an initiator, 4-6 parts of an electrolyte, 4-5 parts of an emulsifier, 1-1.5 parts of a chain transfer agent, 120 parts of water and 170 parts of a non-polar cyclic structure-containing (methyl) acrylate monomer in a side chain and 6-8 parts of a non-polar cyclic structure-containing (methyl) acrylate monomer.
3. The method of claim 1 or 2, wherein the fluorine-containing monomer is at least one of trifluoroethyl acrylate, hexafluorobutyl acrylate, dodecafluoroheptyl acrylate, perfluorohexylethyl acrylate, perfluorooctylethyl acrylate, and perfluorodecylethyl acrylate.
4. The method of claim 1 or 2, wherein the initiator is a water-soluble peroxide initiator; and/or the emulsifier is at least one selected from sodium naphthalene sulfonate formaldehyde condensate, potassium oleate, disproportionated potassium abietate and sodium dodecyl benzene sulfonate.
5. The method of claim 4, wherein the initiator is at least one of sodium persulfate, potassium persulfate, and ammonium persulfate.
6. The method according to claim 1 or 2, wherein the electrolyte is selected from at least one of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, and potassium hydroxide.
7. The method of claim 1 or 2, wherein the chain transfer agent is at least one of tert-dodecyl mercaptan, n-dodecyl mercaptan, and a-methylstyrene dimer.
8. The method according to claim 1 or 2, wherein the (meth) acrylate monomer having a nonpolar cyclic structure in a side chain is at least one of isobornyl methacrylate, cyclohexyl (meth) acrylate, and styrene-2-methacrylate.
9. Polybutadiene latex prepared according to the process of any one of claims 1-8.
10. An ABS resin prepared from the polybutadiene latex of claim 9.
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