CN107151296A - The preparation method of big particle diameter core shell structure silicone acrylates/styrol copolymer - Google Patents
The preparation method of big particle diameter core shell structure silicone acrylates/styrol copolymer Download PDFInfo
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- 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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- 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
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/12—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
- C08F283/124—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes on to polysiloxanes having carbon-to-carbon double bonds
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- C08F6/00—Post-polymerisation treatments
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- C08F6/00—Post-polymerisation treatments
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses the preparation method of big particle diameter core shell structure silicone acrylates/styrol copolymer.The preparation method is the addition polyacrylate agglomerant into polysiloxanes polybutylacrylate latex, and agglomeration obtains silicone acrylates core emulsion；Temperature is adjusted to 60 DEG C~80 DEG C, adds inorganic peroxy class initiator and sodium carbonate, adjusts pH value, adds methyl methacrylate and styrene, and reaction obtains core shell structure silicone acrylates/styrene copolymer latexes；It is diluted with water, it is 15%~19% to control solid content, adds inorganic salt solution, is stirred at room temperature, and is cured, then cools down, centrifuges, washs, and gained is precipitated into drying.Substantially, average grain diameter 400nm~600nm has obvious low temperature toughening effect to engineering plastics makrolon to gained silicone acrylates/styrol copolymer product particles core shell structure of the invention.
Description
Technical field
The present invention relates to a kind of preparation method of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer,
Specifically, be related to a kind of latex particle size 400nm~600nm has nucleocapsid structure polysiloxanes-acrylate/benzene
The preparation method of ethylene copolymer.
Background technology
Polysiloxane rubber polarity is small, and flexibility is good, with excellent high temperature resistant, durability in oxidative degradation；Polyacrylate
Rubber is strong with polar polymer interaction force, is widely used as the impact modifier of thermoplastic resin and its alloy.Poly- silica
Alkane-acrylic acid esters co-polymer combines polysiloxanes and the class polarity spectrum of polyacrylate two very big polymer, simultaneous
Advantage in both performances of tool, can assign thermoplastic resin and its more preferable low temperature impact effect of alloy.Emulsion polymerization is commonly used to
Polysiloxanes-acrylic acid esters co-polymer is prepared, because the increase of particle diameter can influence the stability of polymer emulsion, causes emulsion
A large amount of gels or even the phenomenon being demulsified are produced in building-up process, polymerization process is difficult to control to, so existing emulsion polymerisation process system
Polysiloxanes-acrylic acid esters co-polymer latex particle the particle diameter obtained is mostly in below 200nm.Increase polysiloxanes-acrylic acid
Ester copolymer latex particle particle diameter and it is allowed to that core shell structure is presented, as thermoplastic resin such as makrolon (PC) and its benzene
Ethylene-butylene-acrylonitrile copolymer (ABS) alloy it is impact-resistant modified when effect it is bigger, therefore develop big particle diameter core shell structure
Polysiloxanes-acrylic acid esters co-polymer is significant.
South China Science ＆ Engineering University Feng Meng is in its master's thesis (system of nucleocapsid structure polysiloxanes-acrylate elastomer
Standby and its toughness reinforcing PC/ABS alloy research) in disclose a kind of substep emulsion polymerizing preparation silicon-acrylate elastomer
Method, this method is using octamethylcy-clotetrasiloxane, γ-methacryloxypropyl trimethoxy silane as silane monomer system
Standby polysiloxanes core emulsion, then distinguish graft copolymerization with butyl acrylate, methyl methacrylate, obtain the average grain of latex particle
Footpath is 193.8nm polysiloxanes-acrylate copolymer emulsion, and this method not only adds methyl methacrylate polymerization step
Easily demulsification, and final product is not fairly obvious to PC toughening effects.The patent of invention of GE
(CN99813947.5) emulsion polymerization is used, by reducing the consumption of emulsifying agent, increasing the methods such as reaction time by poly- silica
The size controlling of alkane core emulsion is in more than 400nm, and then grafted acrylate class again, obtains silicone-acrylate rubber punching
Modifying agent is hit, but polysiloxanes core emulsion obtained by this method is very sticky, the problems such as unstable emulsion, layering occurs.
In summary, prior art not yet has prepares big particle diameter, with nucleocapsid structure polysiloxanes-acrylic acid well
The method of ester copolymer.
The content of the invention
400nm~600nm is reached it is an object of the invention to provide a kind of emulsion-stabilizing, latex particle particle diameter, with core-shell structure copolymer
The preparation method of structure polysiloxanes-acrylate/styrol copolymer.
In order to achieve the above object, the present invention uses polyacrylate to polysiloxanes-butyl acrylate copolymer emulsion
The method of class agglomeration, passes through the soft micelle Surface charge layer of local failure polysiloxanes-butyl acrylate copolymer latex
Stability, overcomes the repulsive force of surfactant emulsion agent, makes between particle that interface is close, adhesion, from containing polysiloxanes-butyl acrylate
The short grained stable emulsifying state of copolymer is changed into another stable state of the bulky grain containing copolymer, latex particle particle diameter from
100nm or so increases to more than 300nm as core；With the two kinds of hard monomer graft copolymerizations of methyl methacrylate and styrene, polymerization
Process stabilization, the copolymer of methyl methacrylatestyrene shell in its outer wrap, the final average grain diameter that obtains is in 400nm
~600nm, core shell structure polysiloxanes-acrylate/styrene copolymer latexes, what is obtained after inorganic salts are demulsified is poly-
Silicon-acrylate/styrol copolymer has good toughening effect to makrolon and its with ABS copolymer, especially
It is obvious to makrolon low temperature toughening effect.
The object of the invention is achieved through the following technical solutions：
The preparation method of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer, comprises the following steps：
(1) polyacrylate agglomerant is added into polysiloxanes-polybutylacrylate latex, in 30 DEG C~70 DEG C of temperature
The lower stirring agglomeration of degree 30~120 minutes, obtains polysiloxanes-acrylate core emulsion；Every 100 mass parts dry weight polysiloxanes-
Polybutylacrylate latex adds 1~5 mass parts dry weight polyacrylate agglomerant；
(2) temperature of polysiloxanes-acrylate core emulsion obtained by step (1) is adjusted to 60 DEG C~80 DEG C, added inorganic
Peroxide initiator and sodium carbonate, 9~11 are adjusted to by pH value, and it is 1~3 to add mass ratio:1 methyl methacrylate and benzene
Ethene, reacts 3~6 hours, obtains latex particle for 400nm~600nm, core shell structure polysiloxanes-acrylate/styrene
Copolymer emulsion, the solid content control of emulsion is 30~37%, and the gross mass consumption of methyl methacrylate and styrene is with doing
Reunion silicon-acrylate core quality of the emulsion ratio is 20~45：55~80；
(3) polysiloxanes-acrylate/styrene copolymer latexes obtained by step (2) are diluted with water, control solid content
For 15%~19%, inorganic salt solution is added, is stirred at room temperature after 15~60 minutes, be warming up to 80 DEG C~90 DEG C curings 30~60
Minute, then cool down, centrifuge, wash, gained is precipitated into drying, white solid is obtained, is the big poly- silica of particle diameter core shell structure
Alkane-acrylate/styrol copolymer.
Further to realize the present invention, it is preferable that the preparation side of step (1) polysiloxanes-polybutylacrylate latex
Method is：At 60 DEG C~90 DEG C, first two degree of functionality organosilans, tri-alkoxy organosilan are existed in anion emulsifier
Polymerisation 1~3 hour in the aqueous solution, then thereto add include water, anion emulsifier, two degree of functionality organosilans,
The pre-emulsion mixture of tri-alkoxy organosilan and end-capping reagent, hydrolysis copolycondensation 2~5 hours obtains polysiloxanes breast
Liquid, it is 28%~35% to control solid content；
Deionized water, mixed emulsifier, inorganic peroxy class initiator and carbonic acid are added into the polysiloxane emulsion
Sodium, 9~11 are adjusted to by pH value, at 60 DEG C~80 DEG C, and the mixture of butyl acrylate and crosslinking agent is added using semi-continuous process,
Reacted again after the completion of charging 2~5 hours, obtain polysiloxanes-polybutylacrylate latex；
The gross mass of two kinds of organosilane monomers of two degree of functionality organosilans and tri-alkoxy organosilan and acrylic acid fourth
The mass ratio of ester is 5~25：75~95；Two degree of functionality organosilans account for the 90%~95% of both organosilan gross masses, three
Alkoxy silane accounts for the 5%~10% of two kinds of organosilan gross masses；Two kinds of organosilane monomers are added in two times, keep both
Mass ratio it is constant, the 20-30% of both gross masses of addition, adds remaining 70-80% for the second time for the first time.
Crosslinking agent is allyl methacrylate or GDMA, and its quality consumption is butyl acrylate
The 2%~4% of quality；Solid content is controlled 30~38%.
Preferably, the two degrees of functionality organosilan is octamethylcy-clotetrasiloxane, and the trialkoxy silane is ethene
Base trimethoxy silane, VTES or γ-methacryloxypropyl trimethoxy silane；The end-blocking
Agent is HMDO, and its consumption is the 0.1%~0.3% of two kinds of organosilan gross masses.
Preferably, the anion emulsifier is by C12~16At least one of alkyl benzene sulphonate and C12~18In sodium alkyl sulfate
At least one is constituted, and the mass ratio of two kinds of emulsifying agents is 1~2:1, the consumption of anion emulsifier is two kinds of organosilane monomers
The 2%~5% of gross mass, keeps both mass ratioes constant, adds in two times, add for the first time quality consumption 50%~
75%.
Preferably, the mixed emulsifier is by C12~18At least one of sodium alkyl sulfate and nonylphenol polyoxyethylenes
Ether is constituted, and the mass ratio of two kinds of emulsifying agents is 1:2 to 2:Between 1, consumption is the 1%~5% of butyl acrylate quality.
Preferably, the inorganic peroxy class initiator is potassium peroxydisulfate or ammonium persulfate, and consumption is butyl acrylate quality
0.1%~0.5%；The consumption of sodium carbonate is the 0.5%~1.5% of butyl acrylate quality；It is described that pH value is adjusted to 9~11
It is to be adjusted by sodium hydroxide solution.
Preferably, the preparation method of the polyacrylate agglomerant is：To including deionized water, C12~18Alkyl
Mass ratio is added in two times in the system of at least one of sodium sulphate emulsifying agent, molecular weight regulator and inorganic peroxy class initiator
For 60~90：10~40 butyl acrylate and acrylic acid, reacts 2~4 hours at 60 DEG C~90 DEG C, obtains polyacrylate
Class agglomerant, it is 31%~35% to control solid content, is used after dilution；Control the mass ratio of butyl acrylate and acrylic acid not
Become, the 10% of both gross masses of addition, adds remaining 90% for the second time for the first time, is added using semi-continuous process.
Preferably, the inorganic peroxy class initiator is potassium peroxydisulfate or ammonium persulfate, and consumption is butyl acrylate and third
The 1%~2% of olefin(e) acid gross mass；The C12~18Sodium alkyl sulfate emulsifier is butyl acrylate and acrylic acid gross mass
0.5%~3%；The molecular weight regulator is lauryl mercaptan, and consumption is butyl acrylate and acrylic acid gross mass
0.5%~2%.
Preferably, step (2) the inorganic peroxy class initiator is potassium peroxydisulfate or ammonium persulfate, and consumption is metering system
The 0.1%~0.5% of sour methyl esters and styrene gross mass；Sodium carbonate amount is methyl methacrylate and styrene gross mass
1%~3%；Step (2) is described to be adjusted to 9~11 by pH value is adjusted by sodium hydroxide solution.
Preferably, step (3) described inorganic salts are one kind in magnesium sulfate, calcium chloride and aluminum sulfate, inorganic salt solution
Mass percentage concentration is that polysiloxanes-acrylate of every 100 mass parts dry weight/styrene copolymerized is controlled between 5%~25%
Thing adds 20~120 mass parts inorganic salts；Described dry of step (3) is will to be deposited at 80 DEG C to dry 8~10 hours.
Compared with the prior art, the invention has the advantages that：
(1) using polyacrylate to polysiloxanes-soft particle agglomeration of butyl acrylate copolymer latex, latex particle
Particle diameter increases to more than 300nm from 100nm or so, and the time is 30~120 minutes, and the time is short, and method is simple, efficiency high, and particle diameter
It is adjustable, the core emulsion-stabilizing of formation；
(2) using the two kinds of hard monomer graft copolymerizations of methyl methacrylate and styrene in polysiloxanes-butyl acrylate
The method that duricrust is formed outside copolymer, polymerization process good emulsion stability；Exclusive use methacrylic acid is overcome well
Methylmethacrylate monomer is fast due to polymerization rate, the problems such as producing demulsification；
(3) gained polysiloxanes-acrylate/styrol copolymer product particles core shell structure is obvious, average grain diameter
400nm~600nm, there is obvious low temperature toughening effect to engineering plastics makrolon.
Brief description of the drawings
Fig. 1 is the gained polysiloxanes of embodiment 1-acrylate core emulsion latex particle diameter size distribution figure；
Fig. 2 is the gained polysiloxanes of embodiment 1-acrylate/styrenic copolymer latex particle diameter size distribution figure；
Fig. 3 is the TEM photos of the gained polysiloxanes of embodiment 1-acrylate/styrenic copolymer latex particle；
Fig. 4 is the gained polysiloxanes of comparative example 1-acrylate/styrenic copolymer latex particle diameter size distribution figure；
Fig. 5 is the TEM photos of the gained polysiloxanes of comparative example 1-acrylate/styrenic copolymer latex particle.
Embodiment
To more fully understand the present invention, the present invention is further illustrated with reference to the accompanying drawings and examples, but this hair
Bright embodiment is not limited so.
Embodiment 1
The preparation of polysiloxanes-polybutylacrylate latex：Added in 250ml reaction bulbs 0.3g DBSAs,
0.3g lauryl sodium sulfate and 50g deionized waters, after stirring, are heated to 60 DEG C, add the silicon of 9.0g prestoxs ring four
Oxygen alkane and 1.0g γ-methacryloxypropyl trimethoxy silane, are kept for 60 DEG C react 3 hours；By 20g deionized waters,
0.1g DBSAs, 0.1g lauryl sodium sulfate, 27g octamethylcy-clotetrasiloxanes, 3.0g γ-methacryloxypropyl
Base propyl trimethoxy silicane and 0.04g HMDOs are layered by homogeneous mixer high-speed stirred to without obvious, 2
In hour, the pre-emulsion mixture is added drop-wise in above-mentioned reaction bulb, reacted 5 hours at 60 DEG C, it is 33.8% to obtain solid content
Polysiloxane emulsion；
The above-mentioned polysiloxane emulsions of 8.9g are taken, 80g deionized waters, 0.6g APESs and 0.6g 12 is added
Sodium alkyl sulfate stirs in another 250ml reaction bulbs, is warming up to 60 DEG C；Add 31.18g and contain 0.28g potassium peroxydisulfates
With the aqueous solution of 0.9g sodium carbonate, its pH is adjusted to 11 for 5% sodium hydroxide solution with mass concentration, then dripped in 2 hours
Plus the mixture of 57g butyl acrylates and 1.14g allyl methacrylates, react 5 hours, reaction temperature is maintained at 60 DEG C,
Polysiloxanes-polybutylacrylate latex that solid content is 33.7% is obtained, using the BI- of Brooker Hai Wen instrument companies of the U.S.
90Plus type Zeta potential meters Particle Size Analyzer (following particle diameter is all measured with the instrument) measures average grain diameter for 140nm；
The preparation of polyacrylate agglomerant：180g deionized waters, 3.0g 12 are sequentially added into 250ml reaction bulbs
Sodium alkyl sulfate and 2.0g lauryl mercaptans, stir and are warming up to 60 DEG C, add the over cure that 8.0g mass concentrations are 10%
Sour aqueous solutions of potassium, the mixture of 8.0g butyl acrylates and 2.0g acrylic acid was added dropwise in 0.5 hour, 1.5 are reacted at 60 DEG C
Hour, then add the persulfate aqueous solution that 12.0g mass concentrations are 10%, be added dropwise in 2 hours 72g butyl acrylates and
The mixture of 18g acrylic acid, reacts 2.5 hours at 60 DEG C, obtains the polyacrylate agglomerant that solid content is 32.1%；
The preparation of polysiloxanes-acrylate/styrene copolymer latexes：Take the above-mentioned polysiloxanes-butyl acrylates of 90g
Emulsion is added in another 250ml reaction bulbs, is added after the above-mentioned polyacrylate agglomerants of 1.9g are diluted with 17.1g deionized waters
Enter, stirred 2 hours at 30 DEG C, obtain polysiloxanes-acrylate core emulsion, its latex particle particle size distribution situation is such as
Accompanying drawing 1, average grain diameter is 310nm；Temperature is increased to 60 DEG C, 10.7g is added and contains 0.1g potassium peroxydisulfates and 0.6g sodium carbonate
The aqueous solution, its pH is adjusted to 11 for 3% sodium hydroxide solution with mass concentration, 15g methacrylic acids were added dropwise in 2 hours
Methyl esters and 5g styrene mixtures, and reaction is cooled down after 6 hours at 60 DEG C, the polysiloxanes-acrylate/benzene stablized
Ethylene copolymer emulsion, solid content is 36.9%, gained latex particle particle size distribution situation such as accompanying drawing 2, and average grain diameter is
410nm, and narrowly distributing；Latex particle uses the TECNAIG of FEI electron-opticals company of Holland after being dyed with phosphotungstic acid2- 12 types are saturating
Radio mirror (TEM) is observed, gained photo such as accompanying drawing 3, it can be seen that latex particle size about 410nm, is presented obvious from figure
Core shell structure.
Demulsification：Above-mentioned polysiloxanes-acrylate/the styrene copolymer latexes of 100g are taken, 100g deionized waters are poured into dilute
Release, the aluminum sulfate aqueous solution that 148g mass concentrations are 5% is slowly added at room temperature, persistently stirs 15 minutes, temperature is raised
To 80 DEG C and kept for 60 minutes, then cool down, centrifuge, wash, dried 8 hours at 80 DEG C, obtain the big poly- silicon of particle diameter core shell structure
Oxygen alkane-acrylate/styrol copolymer white solid.
Embodiment 2
The preparation of polysiloxanes-polybutylacrylate latex：Added in 250ml reaction bulbs 0.4g DBSAs,
0.4g lauryl sodium sulfate and 60g deionized waters, after stirring, are heated to 70 DEG C, add the silicon of 9.5g prestoxs ring four
Oxygen alkane and 0.5g γ-methacryloxypropyl trimethoxy silane, are kept for 70 DEG C react 3 hours；By 30g deionized waters,
0.2g DBSAs, 0.2g lauryl sodium sulfate, 28.5g octamethylcy-clotetrasiloxanes, 1.5g vinyl trimethoxies
The mixture of base silane and 0.08g HMDOs was layered by homogeneous mixer high-speed stirred to without obvious, at 2 hours
It is interior, the pre-emulsion mixture is added drop-wise in reaction bulb, reacted 3 hours at 70 DEG C, the poly- silica that solid content is 28.6% is obtained
Alkane emulsion；
The above-mentioned polysiloxane emulsions of 25g are taken, 100g deionized waters, 0.4g APESs and 0.2g 12 is added
Sodium alkyl sulfate stirs in another 250ml reaction bulbs, is warming up to 70 DEG C；Add 30.73g and contain 0.13g ammonium persulfates
With the aqueous solution of 0.6g sodium carbonate, its pH is adjusted to 11 for 2% sodium hydroxide solution with mass concentration, then dripped in 2 hours
Plus the mixture of 63g butyl acrylates and 1.26g GDMAs, react 4 hours, reaction temperature is maintained at 70
DEG C, polysiloxanes-polybutylacrylate latex that solid content is 31.3% is obtained, particle diameter is 140nm；
The preparation of polyacrylate agglomerant：180g deionized waters, 1.0g 16 are sequentially added into 250ml reaction bulbs
Sodium alkyl sulfate and 1.0g lauryl mercaptans, stir and are warming up to 90 DEG C, add the persulfuric acid that 8.0g mass concentrations are 5%
Aqueous solutions of potassium, was added dropwise the mixture of 9.0g butyl acrylates and 1.0g acrylic acid in 0.5 hour, 0.5 was reacted at 90 DEG C small
When, then add the persulfate aqueous solution that 12.0g mass concentrations are 5%, then be added dropwise in 2 hours 81g butyl acrylates and
The mixture of 9g acrylic acid, reacts 1.5 hours at 90 DEG C, obtains the polyacrylate agglomerant that solid content is 31.3%；
The preparation of polysiloxanes-acrylate/styrene copolymer latexes：Take the above-mentioned polysiloxanes of 110g-acrylic acid fourth
Ester emulsion adds in another 250ml reaction bulbs after the above-mentioned polyacrylate agglomerants of 5.6g are diluted with 30.4g deionized waters
Enter, stirred 1 hour at 50 DEG C, obtain polysiloxanes-acrylate core emulsion, the particle diameter for measuring latex particle is 360nm；Will
Temperature is increased to 70 DEG C, adds the aqueous solution that 10.33g contains 0.03g ammonium persulfates and 0.3g sodium carbonate, is with mass concentration
Its pH is adjusted to 11 by 4% sodium hydroxide solution, and 10g methyl methacrylates and 5g styrene mixtures were added dropwise in 2 hours,
And cooled down after being reacted 5 hours at 70 DEG C, the polysiloxanes-acrylate/styrene copolymer latexes stablized, it contains admittedly
Measure as 30.1%, average grain diameter is 450nm；
Demulsification：Above-mentioned polysiloxanes-acrylate/the styrene copolymer latexes of 100g are taken, 100g deionized waters are poured into dilute
Release, the calcium chloride water that 144g mass concentrations are 25% is slowly added at room temperature, persistently stirs 15 minutes, temperature is raised
To 80 DEG C and kept for 60 minutes, then cool down, centrifuge, wash, dried 9 hours at 80 DEG C, obtain the big poly- silicon of particle diameter core shell structure
Oxygen alkane-acrylate/styrol copolymer white solid.
Embodiment 3
The preparation of polysiloxanes-polybutylacrylate latex：Added in 250ml reaction bulbs 0.4g myristyls benzene sulfonic acids,
0.4g sodium hexadecyl sulfates and 60g deionized waters, after stirring, are heated to 80 DEG C, add the silicon of 9.5g prestoxs ring four
Oxygen alkane and 0.5g γ-methacryloxypropyl trimethoxy silane, are kept for 80 DEG C react 2 hours；By 20g deionized waters,
0.4g myristyls benzene sulfonic acid, 0.4g sodium hexadecyl sulfates, 28.5g octamethylcy-clotetrasiloxanes, 1.5g vinyl trimethoxies
The mixture of base silane and 0.08g HMDOs was layered by homogeneous mixer high-speed stirred to without obvious, at 2 hours
It is interior, the pre-emulsion mixture is added drop-wise in reaction bulb, reacted 3 hours at 80 DEG C, the poly- silica that solid content is 31.4% is obtained
Alkane emulsion；
The above-mentioned polysiloxane emulsions of 29g are taken, 100g deionized waters, 0.8g APESs and 0.8g 12 is added
Sodium alkyl sulfate stirs in another 250ml reaction bulbs, is warming up to 70 DEG C；Add 30.55g and contain 0.15g ammonium persulfates
With the aqueous solution of 0.5g sodium carbonate, its pH is adjusted to 10 for 1% sodium hydroxide solution with mass concentration, was added dropwise in 2 hours
The mixture of 51g butyl acrylates and 1.5g allyl methacrylates, reacts 3 hours, reaction temperature is maintained at 70 DEG C, obtains
Solid content is 29.9% polysiloxanes-polybutylacrylate latex, and average grain diameter is 130nm；
The preparation of polyacrylate agglomerant：160g deionized waters, 1.0g 16 are sequentially added into 250ml reaction bulbs
Sodium alkyl sulfate and 1.0g lauryl mercaptans, stir and are warming up to 70 DEG C, add the persulfuric acid that 8.0g mass concentrations are 5%
Aqueous solutions of potassium, then the mixture of 7.0g butyl acrylates and 3.0g acrylic acid was added dropwise in 0.5 hour, 1 is reacted at 70 DEG C small
When, then add the persulfate aqueous solution that 12.0g mass concentrations are 5%, then be added dropwise in 2 hours 63g butyl acrylates and
The mixture of 27g acrylic acid, reacts 2 hours at 70 DEG C, obtains the polyacrylate agglomerant that solid content is 33.5%；
The preparation of polysiloxanes-acrylate/styrene copolymer latexes：Take the above-mentioned polysiloxanes of 102g-acrylic acid fourth
Ester emulsion adds in another 250ml reaction bulbs after the above-mentioned polyacrylate agglomerants of 2.7g are diluted with 24.3g deionized waters
Enter, stirred 1 hour at 50 DEG C, obtain polysiloxanes-acrylate core emulsion, the particle diameter for measuring latex particle is 380nm；Will
Temperature is increased to 70 DEG C, adds the aqueous solution that 10.46g contains 0.06g potassium peroxydisulfates and 0.4g sodium carbonate, is with mass concentration
Its pH is adjusted to 10 by 3% sodium hydroxide solution, and 13.3g methyl methacrylates and the mixing of 6.7g styrene were added dropwise in 2 hours
Thing, and reaction is cooled down after 4 hours at 70 DEG C, the polysiloxanes-acrylate/styrene copolymer latexes stablized, its
Solid content is 33.1%, and the particle diameter for measuring latex particle is 600nm；
Demulsification：Above-mentioned polysiloxanes-acrylate/the styrene copolymer latexes of 100g are taken, 100g deionized waters are poured into dilute
Release, the calcium chloride water that 132g mass concentrations are 20% is slowly added at room temperature, persistently stirs 30 minutes, temperature is raised
To 80 DEG C and kept for 40 minutes, then cool down, centrifuge, wash, dried 10 hours at 80 DEG C, obtain the big poly- silicon of particle diameter core shell structure
Oxygen alkane-acrylate/styrol copolymer white solid.
Embodiment 4
The preparation of polysiloxanes-polybutylacrylate latex：Added in 250ml reaction bulbs 1.0g myristyls benzene sulfonic acids,
0.5g sodium hexadecyl sulfates and 50g deionized waters, after stirring, are heated to 90 DEG C, add the silicon of 9.0g prestoxs ring four
Oxygen alkane and 1.0g VTESs, are kept for 90 DEG C react 1 hour；By 20g deionized waters, 0.33g Tetradecylbenzenes
Sulfonic acid, 0.17g sodium hexadecyl sulfates, 27g octamethylcy-clotetrasiloxanes, 3.0g VTESs and 0.12g six
The mixture of tetramethyldisiloxane, to without substantially layering, in 2 hours, the pre-emulsification is mixed by homogeneous mixer high-speed stirred
Compound is added drop-wise in reaction bulb, is reacted 2 hours at 90 DEG C, obtains the polysiloxane emulsion that solid content is 34.9%；
The above-mentioned polysiloxane emulsions of 40g are taken, 80g deionized waters, 0.6g APESs and 1.1g 16 is added
Sodium alkyl sulfate stirs in another 250ml reaction bulbs, is warming up to 80 DEG C；Add 30.36g and contain 0.06g ammonium persulfates
With the aqueous solution of 0.3g sodium carbonate, its pH is adjusted to 10 for 5% sodium hydroxide solution with mass concentration, then dripped in 2 hours
Plus the mixture of 56g butyl acrylates and 2.24g GDMAs, react 2 hours, reaction temperature is maintained at 80
DEG C, polysiloxanes-polybutylacrylate latex that solid content is 33.7% is obtained, average grain diameter is 120nm；
The preparation of polyacrylate agglomerant：150g deionized waters, 0.5g 18 are sequentially added into 250ml reaction bulbs
Sodium alkyl sulfate and 0.5g lauryl mercaptans, stir and are warming up to 80 DEG C, add the over cure that 8.0g mass concentrations are 10%
Sour aqueous ammonium, then the mixture of 6.0g butyl acrylates and 4.0g acrylic acid was added dropwise in 0.5 hour, reacted at 80 DEG C
0.5 hour, then add the ammonium persulfate aqueous solution that 12.0g mass concentrations are 10%, then the dropwise addition 54g acrylic acid in 2 hours
The mixture of butyl ester and 36g acrylic acid, reacts 1.5 hours at 80 DEG C, obtains the polyacrylate that solid content is 34.9%
Agglomerant；
The preparation of polysiloxanes-acrylate/styrene copolymer latexes：Take the above-mentioned polysiloxanes of 105g-acrylic acid fourth
Ester emulsion adds in another 250ml reaction bulbs after the above-mentioned polyacrylate agglomerants of 2.0g are diluted with 18g deionized waters
Enter, stirred 0.5 hour at 70 DEG C, obtain polysiloxanes-acrylate core emulsion, the particle diameter for measuring latex particle is 330nm；
Temperature is increased to 80 DEG C, the aqueous solution that 10.165g contains 0.015g ammonium persulfates and 0.15g sodium carbonate is added, it is dense with quality
Spend and its pH is adjusted to 10 for 1% sodium hydroxide solution, 7.5g methyl methacrylates were added dropwise in 2 hours and 7.5g styrene is mixed
Compound, and reaction is cooled down after 3 hours at 80 DEG C, the polysiloxanes-acrylate/styrene copolymer latexes stablized,
Its solid content is 34.1%, and the particle diameter for measuring latex particle is 400nm；
Demulsification：Above-mentioned polysiloxanes-acrylate/the styrene copolymer latexes of 100g are taken, 100g deionized waters are poured into dilute
Release, the magnesium sulfate solution that 272g mass concentrations are 15% is slowly added at room temperature, persistently stirs 30 minutes, temperature is raised
To 90 DEG C and kept for 40 minutes, then cool down, centrifuge, wash, dried 9 hours at 80 DEG C, obtain the big poly- silicon of particle diameter core shell structure
Oxygen alkane-acrylate/styrol copolymer white solid.
Embodiment 5
The preparation of polysiloxanes-polybutylacrylate latex：Added in 250ml reaction bulbs 0.3g cetyl benzenesulfonic acids,
0.3g sodium stearyl sulfates and 50g deionized waters, after stirring, are heated to 60 DEG C, add the silicon of 9.0g prestoxs ring four
Oxygen alkane and 1.0g γ-methacryloxypropyl trimethoxy silane, are kept for 60 DEG C react 3 hours；By 20g deionized waters,
0.1g cetyl benzenesulfonic acids, 0.1g sodium stearyl sulfates, 27g octamethylcy-clotetrasiloxanes, 3.0g γ-methacryloxypropyl
The mixture of base propyl trimethoxy silicane and 0.04g HMDOs is by homogeneous mixer high-speed stirred to without substantially
Layering, in 2 hours, the pre-emulsion mixture is added drop-wise in reaction bulb, is reacted 5 hours at 60 DEG C, obtaining solid content is
33.8% polysiloxane emulsion；
The above-mentioned polysiloxane emulsions of 59g are taken, 60g deionized waters, 2.0g APESs and 1.0g 18 is added
Sodium alkyl sulfate stirs in another 250ml reaction bulbs, is warming up to 80 DEG C；Add 30.36g and contain 0.06g potassium peroxydisulfates
With the aqueous solution of 0.3g sodium carbonate, its pH is adjusted to 9 for 1% sodium hydroxide solution with mass concentration, then be added dropwise in 2 hours
The mixture of 60g butyl acrylates and 2.4g allyl methacrylates, reacts 2 hours, reaction temperature is maintained at 80 DEG C, obtains
Solid content is 38.0% polysiloxanes-polybutylacrylate latex, and average grain diameter is 110nm；
The preparation of polyacrylate agglomerant：180g deionized waters, 2.0g 12 are sequentially added into 250ml reaction bulbs
Sodium alkyl sulfate and 1.0g lauryl mercaptans, stir and are warming up to 60 DEG C, add the over cure that 8.0g mass concentrations are 10%
Sour aqueous solutions of potassium, then the mixture of 8.0g butyl acrylates and 2.0g acrylic acid was added dropwise in 0.5 hour, reacted at 60 DEG C
1.5 hours, then add the persulfate aqueous solution that 12.0g mass concentrations are 10%, then the dropwise addition 72g acrylic acid in 2 hours
The mixture of butyl ester and 18g acrylic acid, 2.5 hours at 60 DEG C, obtains the polyacrylate agglomeration that solid content is 31.8%
Agent；
The preparation of polysiloxanes-acrylate/styrene copolymer latexes：Take the above-mentioned polysiloxanes of 107g-acrylic acid fourth
Ester emulsion adds in another 250ml reaction bulbs after the above-mentioned polyacrylate agglomerants of 2.5g are diluted with 22.5g deionized waters
Enter, stirred 2 hours at 30 DEG C, obtain polysiloxanes-acrylate core emulsion, the particle diameter for measuring latex particle is 380nm；Will
Temperature is increased to 80 DEG C, adds the aqueous solution that 10.11g contains 0.01g potassium peroxydisulfates and 0.1g sodium carbonate, is with mass concentration
Its pH is adjusted to 9 by 3% sodium hydroxide solution, dropwise addition 5g methyl methacrylates and 5g styrene mixtures in 2 hours, and
Cooled down after being reacted 3 hours at 80 DEG C, the polysiloxanes-acrylate/styrene copolymer latexes stablized, its solid content is
33.9%, the particle diameter for measuring latex particle is 560nm；
Demulsification：Above-mentioned polysiloxanes-acrylate/the styrene copolymer latexes of 100g are taken, 100g deionized waters are poured into dilute
Release, the aluminum sulfate aqueous solution that 271g mass concentrations are 10% is slowly added at room temperature, persistently stirs 60 minutes, temperature is raised
To 90 DEG C and kept for 30 minutes, then cool down, centrifuge, wash, dried 8 hours at 80 DEG C, obtain the big poly- silicon of particle diameter core shell structure
Oxygen alkane-acrylate/styrol copolymer white solid.
Comparative example 1
Polysiloxanes-polybutylacrylate latex is prepared in the same manner as in Example 1, but gained emulsion directly carries out first
The graft copolymerization of base methyl acrylate and styrene, then using polyacrylate carry out agglomeration, to obtain polysiloxanes-
Acrylate/styrene copolymer latexes carry out particle size determination, and gained particle size distribution situation such as accompanying drawing 4 can from Fig. 4
Arrive, particle diameter distribution is wider, average grain diameter is 200nm, solid content is 38.7%；TEM after latex particle is dyed with phosphotungstic acid shines
Piece such as accompanying drawing 5, it can be seen that core shell structure is presented in latex particle from Fig. 5, but particle is smaller, and diameter only has about 200nm；Using
Method demulsification, drying same as Example 1 etc., obtain polysiloxanes-acrylate/styrol copolymer white solid and oppose
Compare sample.
The product obtained with embodiment 1 and comparative example 1 is used for the toughening modifying of makrolon, by mass percentage for
94.8% makrolon (Samsung of South Korea, model SC-1100R), 5% polysiloxanes-acrylate/styrene copolymerized
Thing, 0.2% antioxidant B215 are carried out after batch mixing, are melted, extruded by dual-screw-stem machine, cooled down, dried, pelletizing and packaging；It is used
Double screw extruder model LTE26/40 (German LabTech companies), each zone temperature of barrel is：First 210 DEG C of area, second
245 DEG C of area, the 3rd 250 DEG C of area, the 4th 255 DEG C of area, the 5th 260 DEG C of area, the 6th 260 DEG C of area, 260 DEG C of SECTOR-SEVEN, Section Eight 265
DEG C, the 9th 265 DEG C of area, 255 DEG C of head, engine speed 150r/min, rate of feeding：25r/min；Prepared pellet presses standard
Size is molded into the standard batten of test, according to ASTMD638 canonical measures tensile strength and elongation at break, according to
ASTMD790 measures bending strength；Injection gained band breach standard impulse batten is freezed 2 in -40 DEG C of cryogenic freezing casees in advance
Hour, according to GB/T 1843-2008 canonical measure notch impact strengths, test result such as table 1.
The raw material proportioning and test result of the embodiment 1 of table 1 and comparative example 1
As can be seen from Table 1, the big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer of the present invention is to poly-
Carbonic ester has good low temperature toughening effect, compared to pure makrolon, and the notch impact strength at -40 DEG C increases more than 1 times, and
Tensile strength is only declined slightly with bending strength；In addition, agglomeration method is used for into methyl methacrylate and benzene in preparation process
The product obtained after Vinyl Graft copolymerization i.e. control sample is smaller to makrolon low temperature toughening effect.Therefore the present invention is using poly-
Esters of acrylic acid after polysiloxanes-soft particle agglomeration of butyl acrylate copolymer latex to being used as core emulsion, emulsion preparation process
Stable, latex particle particle diameter increasing method is simple, and the time is short, efficiency high, gained polysiloxanes-acrylate/styrene copolymerized
Substantially, 400~600nm of average grain diameter has substantially thing product particle core shell structure to engineering plastics makrolon and its ABS
Low temperature toughening effect, with good application prospect.
Claims (10)
1. the preparation method of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer, it is characterised in that including with
Lower step：
(1) polyacrylate agglomerant is added into polysiloxanes-polybutylacrylate latex, at a temperature of 30 DEG C~70 DEG C
Agglomeration 30~120 minutes is stirred, polysiloxanes-acrylate core emulsion is obtained；Every 100 mass parts dry weight polysiloxanes-propylene
Acid butyl ester emulsion adds 1~5 mass parts dry weight polyacrylate agglomerant；
(2) temperature of polysiloxanes-acrylate core emulsion obtained by step (1) is adjusted to 60 DEG C~80 DEG C, adds inorganic peroxy
Class initiator and sodium carbonate, 9~11 are adjusted to by pH value, and it is 1~3 to add mass ratio:1 methyl methacrylate and benzene second
Alkene, reacts 3~6 hours, obtains latex particle common for 400nm~600nm, core shell structure polysiloxanes-acrylate/styrene
Copolymer emulsion, the solid content control of emulsion is 30~37%, the gross mass consumption and dry weight of methyl methacrylate and styrene
Polysiloxanes-acrylate core quality of the emulsion ratio is 20~45：55~80；
(3) polysiloxanes-acrylate/styrene copolymer latexes obtained by step (2) are diluted with water, control the solid content to be
15%~19%, inorganic salt solution is added, is stirred at room temperature after 15~60 minutes, 80 DEG C~90 DEG C is warming up to and cures 30~60 points
Clock, then cool down, centrifuge, wash, precipitates drying by gained, obtains white solid, be big particle diameter core shell structure polysiloxanes-
Acrylate/styrol copolymer.
2. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 1
Method, it is characterised in that the preparation method of step (1) polysiloxanes-polybutylacrylate latex is：At 60 DEG C~90 DEG C,
First by two degree of functionality organosilans, tri-alkoxy organosilan in the aqueous solution that anion emulsifier is present polymerisation 1~3
Hour, then addition includes water, anion emulsifier, two degree of functionality organosilans, tri-alkoxy organosilan and envelope thereto
Hold the pre-emulsion mixture of agent, hydrolysis copolycondensation 2~5 hours obtains polysiloxane emulsion, control solid content be 28%~
35%；
Deionized water, mixed emulsifier, inorganic peroxy class initiator and sodium carbonate are added into the polysiloxane emulsion, will
PH value is adjusted to 9~11, at 60 DEG C~80 DEG C, and the mixture of butyl acrylate and crosslinking agent, charging are added using semi-continuous process
After the completion of react again 2~5 hours, obtain polysiloxanes-polybutylacrylate latex；
The gross mass of two kinds of organosilane monomers of two degree of functionality organosilans and tri-alkoxy organosilan and butyl acrylate
Mass ratio is 5~25：75~95；Two degree of functionality organosilans account for the 90%~95% of both organosilan gross masses, three alcoxyls
Base silane accounts for the 5%~10% of two kinds of organosilan gross masses；Two kinds of organosilane monomers are added in two times, keep both matter
Amount adds the 20-30% of both gross masses, remaining 70-80% is added for the second time for the first time than constant.
Crosslinking agent is allyl methacrylate or GDMA, and its quality consumption is butyl acrylate quality
2%~4%；Solid content is controlled 30~38%.
3. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 2
Method, it is characterised in that the two degrees of functionality organosilan is octamethylcy-clotetrasiloxane, the trialkoxy silane is vinyl
Trimethoxy silane, VTES or γ-methacryloxypropyl trimethoxy silane；The end-capping reagent
For HMDO, its consumption is the 0.1%~0.3% of two kinds of organosilan gross masses.
4. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 2
Method, it is characterised in that the anion emulsifier is by C12~16At least one of alkyl benzene sulphonate and C12~18In sodium alkyl sulfate extremely
A kind of few composition, the mass ratio of two kinds of emulsifying agents is 1~2:1, the consumption of anion emulsifier is total for two kinds of organosilane monomers
The 2%~5% of quality, keeps both mass ratioes constant, adds in two times, and the 50%~75% of quality consumption is added for the first time.
5. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 2
Method, it is characterised in that the mixed emulsifier is by C12~18At least one of sodium alkyl sulfate and nonylphenol polyoxyethylenes ether
Constitute, the mass ratio of two kinds of emulsifying agents is 1:2 to 2:Between 1, consumption is the 1%~5% of butyl acrylate quality.
6. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 2
Method, it is characterised in that the inorganic peroxy class initiator is potassium peroxydisulfate or ammonium persulfate, consumption is butyl acrylate quality
0.1%~0.5%；The consumption of sodium carbonate is the 0.5%~1.5% of butyl acrylate quality；It is described pH value is adjusted to 9~11 to be
Adjusted by sodium hydroxide solution.
7. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 1
Method, it is characterised in that the preparation method of the polyacrylate agglomerant is：To including deionized water, C12~18Alkyl sulfide
Adding mass ratio in two times in the system of at least one of sour sodium emulsifying agent, molecular weight regulator and inorganic peroxy class initiator is
60~90：10~40 butyl acrylate and acrylic acid, reacts 2~4 hours at 60 DEG C~90 DEG C, obtains polyacrylate
Agglomerant, it is 31%~35% to control solid content, is used after dilution；Control the mass ratio of butyl acrylate and acrylic acid constant,
The 10% of both gross masses of addition, adds remaining 90% for the second time for the first time, is added using semi-continuous process.
8. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 7
Method, it is characterised in that the inorganic peroxy class initiator is potassium peroxydisulfate or ammonium persulfate, consumption is butyl acrylate and propylene
The 1%~2% of sour gross mass；The C12~18Sodium alkyl sulfate emulsifier is butyl acrylate and acrylic acid gross mass
0.5%~3%；The molecular weight regulator is lauryl mercaptan, and consumption is butyl acrylate and acrylic acid gross mass
0.5%~2%.
9. the preparation side of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 1
Method, wherein, step (2) the inorganic peroxy class initiator is potassium peroxydisulfate or ammonium persulfate, and consumption is methyl methacrylate
With the 0.1%~0.5% of styrene gross mass；Sodium carbonate amount be methyl methacrylate and styrene gross mass 1%~
3%；Step (2) is described to be adjusted to 9~11 by pH value is adjusted by sodium hydroxide solution.
10. the preparation of big particle diameter core shell structure polysiloxanes-acrylate/styrol copolymer according to claim 1
Method, wherein, step (3) described inorganic salts are one kind in magnesium sulfate, calcium chloride and aluminum sulfate, inorganic salt solution quality hundred
Point concentration is between 5%~25%, to control polysiloxanes-acrylate/styrol copolymer of every 100 mass parts dry weight to add
20~120 mass parts inorganic salts；Described dry of step (3) is will to be deposited at 80 DEG C to dry 8~10 hours.
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| PCT/CN2017/113367 WO2018192222A1 (en) | 2017-04-18 | 2017-11-28 | Preparation method for polysiloxane-acrylate/styrene copolymer with large particle size and core-shell structure |
| ZA2019/04575A ZA201904575B (en) | 2017-04-18 | 2019-07-12 | Method for preparing polysiloxane-acrylate/styrene copolymer with a large particle size and a core-shell structure |
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Also Published As
| Publication number | Publication date |
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| ZA201904575B (en) | 2020-02-26 |
| CN107151296B (en) | 2019-01-29 |
| WO2018192222A1 (en) | 2018-10-25 |
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Effective date of registration: 20191218 Address after: 511442 No. 4-1, He Xi Road, Nan Cao Tang Village, Panyu District South Village, Guangzhou, Guangdong Patentee after: Guangzhou Guanghua Plastic Pipe Co. Ltd. Address before: 510640 Tianhe District, Guangdong, No. five road, No. 381, Patentee before: South China University of Technology |