CN110684155A - Preparation method of acrylate impact modifier and acrylate resin prepared by same - Google Patents
Preparation method of acrylate impact modifier and acrylate resin prepared by same Download PDFInfo
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- CN110684155A CN110684155A CN201810724976.1A CN201810724976A CN110684155A CN 110684155 A CN110684155 A CN 110684155A CN 201810724976 A CN201810724976 A CN 201810724976A CN 110684155 A CN110684155 A CN 110684155A
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- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
Abstract
The invention provides a preparation method of an acrylate impact modifier and acrylate resin prepared by the same. The preparation method of the impact modifier comprises the following steps: (a) mixing water, an emulsifier, a first initiator and a first acrylate monomer to form a pre-emulsion; (b) mixing water and an emulsifier until the emulsifier is dissolved, and adding a second initiator, a first acrylate monomer and a crosslinking agent to form a first emulsion system; (c) adding the pre-emulsion to the first emulsion system to form a second emulsion system; (d) adding a second acrylate monomer and a third initiator to the second emulsion system to form a third emulsion system; (e) filtering and drying the third emulsion system, and granulating to obtain the acrylate impact modifier. The preparation method is simple and easy to operate and low in energy consumption, and the acrylate resin prepared by the preparation method has high weather resistance and transmittance and remarkably improved impact resistance.
Description
Technical Field
The invention relates to the field of petrochemical industry, in particular to a preparation method of an acrylate impact modifier and acrylate resin prepared by the same.
Background
The impact-resistant PMMA molding compound has light transmission, glossiness and excellent mechanical properties and is widely applied, and the impact-resistant modification method mainly improves the mechanical properties of PMMA resin by copolymerization toughening (changing MMA side groups, main valence crosslinking, secondary valence crosslinking and multi-component copolymerization) or blending toughening by doping second phase particles, adopting an interpenetrating polymer network structure, biaxial orientation stretching, a composite process and other means.
The preparation method of the acrylate impact modifier in the prior art mainly has the following defects:
defect one: the preparation method is complex to operate and high in energy consumption.
And defect two: the acrylic resin prepared from the acrylic resin has poor light transmission and low impact strength.
And a third defect: the acrylic resin prepared from the acrylic resin has poor weather resistance and is not suitable for long-term outdoor use.
For the above reasons, further research on the preparation method of the acrylate impact modifier is needed to solve the problems of complex operation, high energy consumption, poor light transmittance, poor weather resistance and low impact strength of the acrylate resin prepared from the acrylate impact modifier.
Disclosure of Invention
The invention mainly aims to provide a preparation method of an acrylate impact modifier, which aims to solve the problems that the preparation method in the prior art is complex in operation and high in energy consumption, and the prepared acrylate resin is poor in light transmittance, poor in weather resistance and low in impact strength.
In order to achieve the above objects, according to one aspect of the present invention, there is provided a method of preparing an acrylate-based impact modifier. The preparation method comprises the following steps: (a) dividing a first acrylate monomer into a first part and a second part, and mixing water, an emulsifier, a first initiator and the first part of the first acrylate monomer to form a pre-emulsion; (b) mixing water and an emulsifier until the emulsifier is dissolved, adding a second initiator, a second part of the first acrylate monomer and a crosslinking agent, and continuously reacting to form a first emulsion system; (c) adding the pre-emulsion into the first emulsion system, and continuing to react to form a second emulsion system after the addition is finished; (d) adding a second acrylic ester monomer and a third initiator into the second emulsion system, and continuing to react to form a third emulsion system after the addition is finished; (e) filtering and drying the third emulsion system, and granulating to obtain the acrylate impact modifier.
Further, the process is carried out at a temperature of 60 ℃ to 90 ℃; preferably, the operation time of each addition process in the step (c) and the step (d) is 0.5 to 4 hours, and the reaction time of each continuous reaction process is 10 minutes to 3 hours.
Further, the emulsifier is an alkyl sulfate.
Further, the first initiator is one or more of dicumyl peroxide, cumene hydroperoxide, sodium formaldehyde sulfoxylate and potassium persulfate; the second initiator is one or more of potassium persulfate, hydrogen peroxide and sodium formaldehyde sulfoxylate; the third initiator is one or more of persulfate and sodium formaldehyde sulfoxylate; preferably, the cross-linking agent is one or more of butadiene and an alcohol dimethacrylate.
Further, the first acrylate monomer is butyl acrylate, and the second acrylate monomer is one or more of methyl methacrylate, methyl acrylate, ethyl acrylate and butyl acrylate; preferably, in the acrylate impact modifier, the weight ratio of the first acrylic monomer, the emulsifier, the first initiator, the second initiator, the third initiator and the cross-linking agent is 1: 0.1-0.3: 0.6-0.8: 0.001-0.01.
According to another aspect of the present invention, there is provided an acrylate impact modifier prepared according to the above method.
Furthermore, the latex particle of the acrylate impact modifier has a particle size of 200 nm-500 nm; preferably, the weight ratio of the core to the shell of the latex particles of the acrylate impact modifier is 70-85: 30-15.
According to another aspect of the present invention, there is provided a method for preparing an acrylate-based resin, the method comprising the steps of: (f) mixing a second acrylate monomer, a third acrylate monomer, a solvent, a fourth initiator and a regulator to form a pre-prepared solution; (g) and sequentially adding the pre-prepared solution and the acrylic ester impact modifier into a reaction kettle, and granulating to obtain the acrylic ester resin.
Further, the step (g) is carried out under the conditions that the oil bath temperature is 130-200 ℃, the temperature in the reaction kettle is 145-180 ℃, the pressure in the reaction kettle is 0.26-0.3 MPa, and the stirring speed in the reaction kettle is 170-180 r/min; preferably, the second acrylate monomer is one or more of methyl methacrylate, methyl acrylate, ethyl acrylate and butyl acrylate, the third acrylate monomer is one or more of methyl acrylate and ethyl acrylate, and the solvent is one or more of toluene and xylene; the fourth initiator is one or more of azobisisobutyronitrile and di-tert-butyl peroxide; the regulator is one or more of tert-dodecyl mercaptan and dodecyl mercaptan.
Further, the acrylic resin comprises 75 to 95 weight percent of the acrylic impact modifier and 5 to 25 weight percent of the pre-preparation liquid; preferably, the monomer polymer mixture comprises a polymer of the second acrylate monomer and a polymer of the third acrylate monomer, and the polymerization system comprises the monomer polymer mixture and the solvent, wherein the polymerization system comprises 75-85% of the monomer polymer mixture and 15-25% of the solvent by weight percentage; preferably, the monomer polymer mixture comprises, in weight percent, 90% to 97% of the polymer of the second acrylate monomer and 3% to 10% of the polymer of the third acrylate monomer; preferably, the fourth initiator is 0.1 to 1 part by weight and the regulator is 0.12 to 0.35 part by weight based on 100 parts by weight of the monomer polymer mixture.
According to another aspect of the present invention, there is provided an acrylic resin prepared according to the above method.
By applying the technical scheme of the invention, the preparation method of the acrylate impact modifier comprises the following steps: (a) dividing a first acrylate monomer into a first part and a second part, and mixing water, an emulsifier, a first initiator and the first part of the first acrylate monomer to form a pre-emulsion; (b) mixing water and an emulsifier until the emulsifier is dissolved, adding a second initiator, a second part of the first acrylate monomer and a crosslinking agent, and continuously reacting to form a first emulsion system; (c) adding the pre-emulsion into the first emulsion system, and continuing to react to form a second emulsion system after the addition is finished; (d) adding a second acrylic ester monomer and a third initiator into the second emulsion system, and continuing to react to form a third emulsion system after the addition is finished; (e) filtering and drying the third emulsion system, and granulating to obtain the acrylate impact modifier. The preparation method is simple and easy to operate and low in energy consumption, and the acrylate resin prepared by the preparation method has high weather resistance and transmittance and remarkably improved impact resistance.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
As described in the background art, the existing preparation method of the acrylate impact modifier cannot effectively solve the problems of complex operation, high energy consumption, poor light transmittance, poor weather resistance and low impact strength of the prepared acrylate resin. In order to solve the above problems, the present invention provides a method for preparing an acrylate impact modifier. The preparation method comprises the following steps: (a) dividing a first acrylate monomer into a first part and a second part, and mixing water, an emulsifier, a first initiator and the first part of the first acrylate monomer to form a pre-emulsion; (b) mixing water and an emulsifier until the emulsifier is dissolved, adding a second initiator, a second part of the first acrylate monomer and a crosslinking agent, and continuously reacting to form a first emulsion system; (c) adding the pre-emulsion into the first emulsion system, and continuing to react to form a second emulsion system after the addition is finished; (d) adding a second acrylic ester monomer and a third initiator into the second emulsion system, and continuing to react to form a third emulsion system after the addition is finished; (e) filtering and drying the third emulsion system, and granulating to obtain the acrylate impact modifier.
The preparation method is simple and easy to operate and low in energy consumption, the prepared acrylate resin has high weather resistance and transmittance and remarkably improved impact resistance, and the notch impact strength can reach 3.5KJ/m2-4.5KJ/m2It can be used in automobile, building, advertisement, medicine, communication and electronic fields.
In a preferred embodiment, the process is carried out at a temperature of from 60 ℃ to 90 ℃; preferably, the operation time of each addition process in the step (c) and the step (d) is 0.5 to 4 hours, and the reaction time of each continuous reaction process is 10 minutes to 3 hours. Compared with other reaction conditions, the reaction conditions can fully carry out the reaction, and the yield of the product is effectively improved.
In a preferred embodiment, the emulsifier is an alkyl sulfate. Compared with other emulsifiers, the emulsifier can obviously improve the stability of the emulsion.
In a preferred embodiment, the first initiator is one or more of dicumyl peroxide, cumene hydroperoxide, sodium formaldehyde sulfoxylate, and potassium persulfate; the second initiator is one or more of potassium persulfate, hydrogen peroxide and sodium formaldehyde sulfoxylate; the third initiator is one or more of persulfate and sodium formaldehyde sulfoxylate; preferably, the cross-linking agent is one or more of butadiene and an alcohol dimethacrylate. The initiator and the crosslinking agent of the present application enable the reaction to proceed sufficiently and leave less residual monomers than other initiators and crosslinking agents.
Illustratively, the first acrylate monomer is a butyl acrylate monomer and the second acrylate monomer is one or more of methyl methacrylate, methyl acrylate, ethyl acrylate, and butyl acrylate.
In order to further balance the effects of the components and to more fully exert the synergistic effect between the components, in a preferred embodiment, the weight ratio of the first acrylic monomer, the emulsifier, the first initiator, the second initiator, the third initiator, and the crosslinking agent in the acrylic impact modifier is 1: 0.1-0.3: 0.6-0.8: 0.001-0.01.
According to another aspect of the present invention, there is provided an acrylate impact modifier prepared according to the above method. The acrylate resin prepared by the acrylate impact modifier has stronger weather resistance and transmittance and obviously improved impact resistance, and the notch impact strength can reach 3.5KJ/m2-4.5KJ/m2It can be used in automobile, building, advertisement, medicine, communication and electronic fieldsThe field of the technology.
In order to further optimize the physical and chemical properties of the acrylate impact modifier of the present application, in a preferred embodiment, the particle size of the latex particles of the acrylate impact modifier is 200nm to 500 nm; preferably, the weight ratio of the core to the shell of the latex particles of the acrylate impact modifier is 70-85: 30-15.
According to another aspect of the present invention, there is provided a method for preparing an acrylate-based resin, the method comprising the steps of: (f) mixing a second acrylate monomer, a third acrylate monomer, a solvent, a fourth initiator and a regulator to form a pre-prepared solution; (g) and sequentially adding the pre-prepared solution and the acrylic ester impact modifier into a reaction kettle, and granulating to obtain the acrylic ester resin.
The preparation method is simple and easy to operate and low in energy consumption, the prepared acrylate resin has high weather resistance and transmittance and remarkably improved impact resistance, and the notch impact strength can reach 3.5KJ/m2-4.5KJ/m2It can be used in automobile, building, advertisement, medicine, communication and electronic fields.
In a preferred embodiment, the step (g) is carried out at an oil bath temperature of 130 to 200 ℃, a reaction vessel internal temperature of 145 to 180 ℃, a reaction vessel internal pressure of 0.26 to 0.3MPa, and a reaction vessel internal stirring rotation speed of 170 to 180 r/min. Compared with other reaction conditions, the reaction conditions can fully carry out the reaction, effectively improve the yield of the product and enable the average conversion rate of polymerization to reach 73-80%.
Illustratively, the second acrylate monomer is one or more of methyl methacrylate, methyl acrylate, ethyl acrylate, and butyl acrylate, the third acrylate monomer is one or more of methyl acrylate and ethyl acrylate, and the solvent is one or more of toluene and xylene; the fourth initiator is one or more of azobisisobutyronitrile and di-tert-butyl peroxide; the regulator is one or more of tert-dodecyl mercaptan and dodecyl mercaptan.
In order to further balance the effects of the components and more fully exert the synergistic effect between the components, in a preferred embodiment, the acrylate resin comprises 75 to 95% by weight of the acrylate impact modifier and 5 to 25% by weight of the pre-preparation; preferably, the monomer polymer mixture comprises a polymer of the second acrylate monomer and a polymer of the third acrylate monomer, and the polymerization system comprises the monomer polymer mixture and the solvent, wherein the polymerization system comprises 75-85% of the monomer polymer mixture and 15-25% of the solvent by weight percentage; preferably, the monomer polymer mixture comprises, in weight percent, 90% to 97% of the polymer of the second acrylate monomer and 3% to 10% of the polymer of the third acrylate monomer; preferably, the fourth initiator is 0.1 to 1 part by weight and the regulator is 0.12 to 0.35 part by weight based on 100 parts by weight of the monomer polymer mixture.
According to another aspect of the present invention, there is provided an acrylic resin prepared according to the above method. The acrylic resin has stronger weather resistance and transmittance and obviously improved impact resistance, and the notch impact strength can reach 3.5KJ/m2-4.5KJ/m2It can be used in automobile, building, advertisement, medicine, communication and electronic fields.
Example one
(1) Preparation of acrylate impact modifier:
53800L of deionized water and 80g of alkyl sulfate are added into the reaction kettle, and N is introduced2The air in the kettle was removed and the temperature of the heating water bath in the jacket was controlled to about 90 ℃. Starting a stirring motor to completely dissolve the emulsifier, adding 448g of potassium persulfate aqueous solution with the concentration of 5%, 6730g of butyl acrylate monomer and 67.3g of mixture of butadiene and dimethyl acrylic acid alcohol ester, reacting for about 30min, and finishing the seed polymerization. Continuously dropwise adding a butyl acrylate monomer pre-emulsion prepared by mixing in advance and containing alkyl sulfate, dicumyl peroxide and butyl acrylate into a seed emulsion system obtained by the polymerization in the upper stage51427g, 400g of 5% strength aqueous potassium persulfate solution was added twice periodically to the reactor during the addition to replenish the consumed potassium persulfate. The total time for dropwise addition of the butyl acrylate monomer was controlled to be about 3.5 h. And after the dropwise addition is finished, continuing to react for about 2 hours to finish the polymerization of the core, thereby obtaining the acrylate core emulsion.
And (3) dropwise adding 10572g of methyl methacrylate monomer into the prepared acrylate nuclear emulsion reaction kettle, simultaneously adding 800g of potassium persulfate matched with the methyl methacrylate, controlling the dropwise addition to be finished for about 1h, then adding a proper amount of potassium persulfate, and continuing to perform heat preservation reaction for about 2h to finish the reaction. Latex with the particle size of 200nm is prepared and is filtered to prepare powder for standby.
(2) The preparation method of the acrylate resin comprises the following steps:
uniformly mixing 22800g of methyl methacrylate monomer, 1200g of methyl acrylate, 6000g of toluene, 100g of azodiisobutyronitrile and 100g of tert-dodecyl mercaptan in advance, adding the mixture into a charging tank, continuously adding the mixture into a polymerization reaction kettle through a charging pump, purging the mixture by using nitrogen, starting stirring, starting an oil bath for heating, and setting the temperature of the oil bath to be about 200 ℃. And starting the feeding pump, the double-screw extruder and the side feeding extruder for preheating. The temperature in the reaction kettle is about 180 ℃, the pressure in the reaction kettle is about 0.3MPa, the stirring speed in the reaction kettle is about 180r/min, and the temperature of the extruder is about 210 ℃. The acrylic ester impact modifier prepared in advance is added into a side feeder in a metering way, and the acrylic ester resin is obtained by granulation, wherein the notch impact strength of the acrylic ester resin is 4.5KJ/m2。
Example two
(1) Preparation of acrylate impact modifier:
53800L of deionized water and 80g of alkyl sulfate are added into the reaction kettle, and N is introduced2The air in the kettle was removed and the temperature of the heating water bath in the jacket was controlled to about 60 ℃. Starting a stirring motor to completely dissolve the emulsifier, adding 400g of 5% potassium persulfate aqueous solution, 6000g of butyl acrylate monomer and 60g of butadiene-dimethylacrylate mixture, reacting for about 30min, and finishing seed polymerization. Continuously dropwise adding the pre-mixed mixture into a seed emulsion system obtained by polymerization in the upper stage51000g of prepared butyl acrylate monomer pre-emulsion containing alkyl sulfate, cumene peroxide and butyl acrylate is added into a reactor twice at regular time in the dropping process, and 350g of 5% potassium persulfate aqueous solution is added into the reactor so as to supplement consumed potassium persulfate. The total time for dropping the monomers was controlled to be about 3 hours. And after the dropwise addition is finished, continuing to react for about 2 hours to finish the polymerization of the core, thereby obtaining the acrylate core emulsion.
And (3) dropwise adding 10500g of methyl methacrylate monomer calculated according to different core-shell ratios into the prepared acrylate core-shell emulsion reaction kettle, simultaneously adding 780g of potassium persulfate matched with the methyl methacrylate, controlling the dropwise addition to be finished for about 1h, then supplementing a proper amount of potassium persulfate, and continuing to perform heat preservation reaction for about 1 h. Latex with the particle size of 260nm is prepared and is filtered to prepare powder for standby.
(2) The preparation method of the acrylate resin is the same as that of the first embodiment, and the notch impact strength of the acrylate resin is 4.3KJ/m2。
EXAMPLE III
(1) The preparation method of the acrylate impact modifier is the same as that of example one.
(2) The preparation method of the acrylate resin comprises the following steps:
22800g of methyl methacrylate monomer, 1200g of methyl acrylate, 6000g of toluene, 100g of di-tert-butyl peroxide and 100g of dodecyl mercaptan are mixed uniformly in advance, added into a charging tank, continuously added into a polymerization reaction kettle through a charging pump, purged by nitrogen, started to stir, started to heat in an oil bath, and the set temperature of the oil bath is about 170 ℃. And starting the feeding pump, the double-screw extruder and the side feeding extruder for preheating. The temperature in the reaction kettle is about 160 ℃, the pressure in the reaction kettle is about 0.3MPa, the stirring speed in the reaction kettle is about 170r/min, and the temperature of the extruder is about 210 ℃. The acrylic ester impact modifier prepared in advance is added into a side feeder in a metering way, and the acrylic ester resin is obtained by granulation, wherein the notch impact strength of the acrylic ester resin is 4.2KJ/m2。
Example four
(1) The preparation method of the acrylate impact modifier is the same as that of example one.
(2) The preparation method of the acrylate resin comprises the following steps:
22800g of methyl methacrylate monomer, 1200g of methyl acrylate, 6000g of toluene, 100g of azobisisobutyronitrile and 100g of dodecyl mercaptan are mixed uniformly in advance, added into a charging tank, continuously added into a polymerization reaction kettle through a charging pump, purged by nitrogen, started to stir, started to heat in an oil bath with the set temperature of about 150 ℃. And starting the feeding pump, the double-screw extruder and the side feeding extruder for preheating. The temperature in the reaction kettle is about 150 ℃, the pressure in the reaction kettle is about 0.28MPa, the stirring speed in the reaction kettle is about 175r/min, and the temperature of the extruder is about 210 ℃. The acrylic ester impact modifier prepared in advance is added into a side feeder in a metering way, and the acrylic ester resin is obtained by granulation, wherein the notch impact strength of the acrylic ester resin is 4.0KJ/m2。
EXAMPLE five
(1) The preparation method of the acrylate impact modifier is the same as that of example one.
(2) The preparation method of the acrylate resin comprises the following steps:
uniformly mixing 22800g of methyl methacrylate monomer, 1200g of methyl acrylate, 6000g of toluene, 100g of azodiisobutyronitrile and 100g of tert-dodecyl mercaptan in advance, adding the mixture into a charging tank, continuously adding the mixture into a polymerization reaction kettle through a charging pump, purging the mixture by using nitrogen, starting stirring, starting an oil bath for heating, and setting the temperature of the oil bath to be about 130 ℃. And starting the feeding pump, the double-screw extruder and the side feeding extruder for preheating. The temperature in the reaction kettle is about 145 ℃, the pressure in the reaction kettle is about 0.26MPa, the stirring speed in the reaction kettle is about 170r/min, and the temperature of the extruder is about 210 ℃. The acrylic ester impact modifier prepared in advance is added into a side feeder in a metering way, and the acrylic ester resin is obtained by granulation, wherein the notch impact strength of the acrylic ester resin is 3.8KJ/m2。
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the preparation method of the acrylate impact modifier is simple and easy to operate and low in energy consumption, and the acrylate resin prepared from the acrylate impact modifier has stronger weather resistance and transmittance and obviously improved impact resistanceCan ensure that the notch impact strength can reach 3.5KJ/m2-4.5KJ/m2It can be used in automobile, building, advertisement, medicine, communication and electronic fields.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preparing an acrylate impact modifier, comprising the steps of:
(a) dividing a first acrylate monomer into a first part and a second part, and mixing water, an emulsifier, a first initiator and the first part of the first acrylate monomer to form a pre-emulsion;
(b) mixing water and an emulsifier until the emulsifier is dissolved, adding a second initiator, a second part of the first acrylate monomer and a crosslinking agent, and continuously reacting to form a first emulsion system;
(c) adding the pre-emulsion into the first emulsion system, and continuing to react to form a second emulsion system after the pre-emulsion is added;
(d) adding a second acrylic ester monomer and a third initiator into the second emulsion system, and continuing to react to form a third emulsion system after the addition is finished;
(e) and filtering and drying the third emulsion system, and granulating to obtain the acrylate impact modifier.
2. The process according to claim 1, characterized in that it is carried out at a temperature of 60 ℃ to 90 ℃; preferably, the operation time of each adding process in the step (c) and the step (d) is 0.5-4 hours, and the reaction time of each continuous reaction process is 10 minutes-3 hours.
3. The method of claim 1, wherein the emulsifier is an alkyl sulfate; preferably, the first initiator is one or more of dicumyl peroxide, cumene hydroperoxide, sodium formaldehyde sulfoxylate and potassium persulfate; the second initiator is one or more of potassium persulfate, hydrogen peroxide and sodium formaldehyde sulfoxylate; the third initiator is one or more of persulfate and sodium formaldehyde sulfoxylate; the cross-linking agent is one or more of butadiene and dimethyl acrylic acid alcohol ester.
4. The method of any one of claims 1 to 3, wherein the first acrylate monomer is butyl acrylate and the second acrylate monomer is one or more of methyl methacrylate, methyl acrylate, ethyl acrylate, and butyl acrylate; preferably, in the acrylic impact modifier, the weight ratio of the first acrylic monomer, the emulsifier, the first initiator, the second initiator, the third initiator and the seventh crosslinking agent is 1: 0.1-0.3: 0.6-0.8: 0.001-0.01.
5. An acrylate impact modifier prepared according to the method of any one of claims 1 to 4.
6. The acrylate impact modifier of claim 5, wherein the latex particles of the acrylate impact modifier have a particle size of 200nm to 500 nm; preferably, the weight ratio of the core to the shell of the latex particles of the acrylate impact modifier is 70-85: 30-15.
7. A preparation method of acrylate resin is characterized by comprising the following steps:
(f) mixing a second acrylate monomer, a third acrylate monomer, a solvent, a fourth initiator and a regulator to form a pre-prepared solution;
(g) sequentially adding the pre-prepared solution and the acrylate impact modifier of claim 5 or 6 into a reaction kettle, and granulating to obtain the acrylate resin.
8. The method according to claim 7, wherein the step (g) is carried out at an oil bath temperature of 130 to 200 ℃, a reaction kettle internal temperature of 145 to 180 ℃, a reaction kettle internal pressure of 0.26 to 0.3MPa, and a reaction kettle internal stirring rotation speed of 170 to 180 r/min; preferably, the second acrylate monomer is one or more of methyl methacrylate, methyl acrylate, ethyl acrylate and butyl acrylate, the third acrylate monomer is one or more of methyl acrylate and ethyl acrylate, and the solvent is one or more of toluene and xylene; the fourth initiator is one or more of azobisisobutyronitrile and di-tert-butyl peroxide; the regulator is one or more of tert-dodecyl mercaptan and dodecyl mercaptan.
9. The method according to any one of claims 7 to 8, wherein the acrylate-based resin comprises, in weight percent, 75% to 95% of the acrylate-based impact modifier and 5% to 25% of the pre-preparation liquid; preferably, the monomer polymer mixture comprises a polymer of the second acrylate monomer and a polymer of the third acrylate monomer, and a polymerization system comprises the monomer polymer mixture and the solvent, wherein the polymerization system comprises 75-85% of the monomer polymer mixture and 15-25% of the solvent by weight percentage; preferably, the monomer polymer mixture comprises, in weight percent, 90% to 97% of the polymer of the second acrylate-based monomer and 3% to 10% of the polymer of the third acrylate-based monomer; preferably, the fourth initiator is 0.1 to 1 part by weight and the regulator is 0.12 to 0.35 part by weight based on 100 parts by weight of the monomer polymer mixture.
10. An acrylate resin prepared according to the method of any one of claims 7 to 9.
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