CN103709334B - A kind of preparation method of alkyd-acrylate hybrid emulsion - Google Patents
A kind of preparation method of alkyd-acrylate hybrid emulsion Download PDFInfo
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Abstract
The present invention discloses the preparation method of a kind of alkyd acrylate hybrid emulsion, step is as follows: with vinyl monomer pre-emulsion as seed priming, it is subsequently adding alkyd resin pre-emulsion and carries out emulsion polymerization, dual initiation is carried out with Ammonium persulfate. and dibenzoyl peroxide, synthesis has the alkyd acrylate hybrid emulsion of nucleocapsid structure, with alkyd resin as core, with acrylic resin as shell, alkyd resin and vinyl monomer mass ratio are 35～45:65～55, and hybridisation emulsion solid content is more than 45%.The cooperative effect of each component in the hybridisation emulsion of the present invention, film forming procedure need not coalescents or cosolvent, and surface drying is fast；Oiliness drier adds with the common pre-emulsification of alkyd resin, improves the doing solid work property of film, and gained hybridisation emulsion has the premium properties of alkyd resin and acrylic resin, economy, environmental protection, can be widely used in industrial coating field.
Description
Technical field
The present invention relates to a kind of emulsion preparation method, particularly relate to the preparation method of a kind of alkyd-acrylate hybrid emulsion, belong to
In polymer chemistry and technical field of emulsion polymerization.
Background technology
The VOC (VOC) that coating and paint industry are discharged, including causing atmosphere oxidation capacity and acidity
Change (causing acid rain), and produce the Hydrocarbon of photochemical fog, organohalogen compounds, organic sulfur compound etc..Environmental regulation
Be gradually improved, the continuous enhancing of environmental consciousness, nontoxic, cheap water is introduced in coating, resource can be saved, reduce into
This, can reduce again the discharge of VOC, and this makes water paint be able to fast development.
Alkyd resin has that self-crosslinked oxidation, coating be plentiful, good decorative property, easy working feature, good combination property, and to plant
Thing oil Renewable resource is raw material, has sustainable development and " green " characteristic, occupies at coating industry very important
Status, consumption is maximum.China's alkyd resin yield is more than 1,200,000 tons/year, mainly with 200# gasoline as solvent, traditional
Phthalic resin coating contains the hydrocarbon solvent of more than 40%, produces, constructing consumes about the organic solvent of more than 1,000,000 tons/year, both
Pollute environment and waste again the energy.
According to " China coating industry " 12 " planning " about the developing direction of coating industry: first is that cleaning produces, the
Two is recycling economy, and the 3rd is environmental friendliness, and the 4th is energy-saving and emission-reduction.Water-borne Modification of Alkyd Resin is then that the main of alkyd resin is sent out
One of exhibition trend.Although single water soluble alkyd resin or emulsion alkyd resin have good film-forming property, gloss advantages of higher,
But its dried coating film is slow, and hardness is low, and the method for present big multiplex modification improves the performance of aqueous alkide resin, wherein with propylene
The modified mode of acid resin is studied more, can be by the quick-drying of the high glaze of alkyd emulsion, permeability and acrylic emulsion, resistance to
The advantages such as Hou Xing combine.
But in presently disclosed acrylic modified alkyd hybridisation emulsion achievement in research, main employing pre-emulsification semicontinuous dropping technique is closed
Becoming, in emulsion system, alkyd resin proportion is less, and emulsion solid content is low, and not only cost is high, and film property is the most undesirable, becomes
Membrane process needs to add conventional emulsion film forming auxiliary agent.Therefore research solid content is high, alkyd resin content is high, without coalescents
And the hybridisation emulsion that dryness is fast, to aqueous alkide resin application in industrial coating, reduce coating industry cost, minimizing
VOC emission aspect more has realistic meaning.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of alkyd-acrylate hybrid emulsion, alkyd-the third prepared by the method
It is fast that olefin(e) acid ester hybridisation emulsion has film forming, is not required to add the advantages such as coalescents.
The adopted technical solution is that:
The preparation method of a kind of alkyd-acrylate hybrid emulsion, comprises the following steps:
(1) prepared by alkyd resin: prepare the air-drying property alkyd resin containing unsaturated double-bond with drying oil and tetramethylolmethane for raw material,
Oil content 45～65%, acid number≤12mgKOH/g, viscosity 7～8s(25 DEG C with form pipe measure)；
(2) alkyd resin pre-emulsification: add oiliness alkyd resin drier, oiliness in alkyd resin prepared by step (1)
Initiator and vinyl monomer, be uniformly mixed；It is subsequently adding deionized water, emulsifying agent and aqueous initiator, at room temperature
Through mulser high speed emulsifying, in emulsion process, container is immersed in frozen water, keeps steady temperature, obtains alkyd resin pre-emulsion, standby
With；
(3) vinyl monomer pre-emulsification: after emulsifying agent, vinyl monomer, deionized water mix homogeneously, through mulser at a high speed
Disperse 10～20 minutes, obtain vinyl monomer pre-emulsion, standby；
(4) prepared by alkyd-acrylate hybrid emulsion: use seeded emulsion polymerization method, equipped with condenser, mechanical agitation
In the four-hole bottle of device, nitrogen access tube, separatory funnel and thermometer, be first passed through nitrogen remove air, then by NaHCO3, go
Ionized water, emulsifying agent add in four-hole bottle, are under agitation warming up to 70 DEG C, add vinyl monomer pre-emulsion, are incubated 5min
After, add aqueous initiator, obtain the seed emulsion in blue light；Then it is warming up to 80 DEG C, under insulation, is added dropwise to alkyd resin
Pre-emulsion, then 90 DEG C of insulation 1h；It is cooled to 65 DEG C again, is initially charged tert-butyl hydroperoxide, be incubated 20min, add first
Aldehyde closes sodium bisulphite, is incubated 30in, carries out monomer and eliminates reaction；Finally it is cooled to 30 DEG C, regulates emulsion by pH adjusting agent
PH value, to 7-8, filters, packaging.
Preferably, described in step (1), the preparation process of air-drying property alkyd resin is as follows:
(101) alcoholysis: refined Oleum Glycines and tetramethylolmethane are carried out ester exchange reaction at 220 DEG C～240 DEG C, to sampling and measuring matter
Amount 25 DEG C of tolerances of percent concentration 95% ethanol are (3～5): 1 as end-point of alcoholysis；
(102) esterification: after step (101) completes, continuously add phthalate anhydride and dimethylbenzene, is incubated 1h at 200 DEG C,
Then it is warmed up to 215～220 DEG C of insulation 2h, surveys acid number, viscosity, as acid number≤12mgKOH/g, and survey with form pipe at 25 DEG C
Determining after viscosity is 7～8s, to stop heating immediately, start cooling, temperature is down to 150 DEG C, and decompression steams two in alkyd resin
Toluene；It is cooled to 60 DEG C again, extracts alkyd resin out, add alkyd resin weight 7～the water-repelling agent of 10% under nitrogen protection, stir
Mix dilution, filter standby.
Above-mentioned refined Oleum Glycines is preferably (3～4) with the mass ratio of tetramethylolmethane: 1；Phthalate anhydride, dimethylbenzene addition with
The mass ratio of tetramethylolmethane is preferably (1.5～2): (0.2～0.3): 1.
In step (102), described water-repelling agent is preferably in hexadecane, n-decane, hexadecanol or polymethyl methacrylate
One or more combination.
In step (2): described alkyd resin, oiliness alkyd resin drier, oiliness initiator and the mass ratio of vinyl monomer
It is preferably (40～50): (2～3): (1～2): (45～55)；The interpolation of deionized water, emulsifying agent and aqueous initiator
Amount is preferably (35～45) with the mass ratio of vinyl monomer: (2～3): (0.1～0.3): (45～55)；Step (3)
In: the mass ratio of described emulsifying agent, vinyl monomer and deionized water be preferably (0.5～0.8): (20～25): (15～
20)；In step (4): NaHCO3, deionized water, the mass ratio of emulsifying agent and vinyl monomer pre-emulsion be (1～1.5):
(150～200): (1.5～3): (35～45)；Aqueous initiator addition account for vinyl monomer pre-emulsion quality 0.3%～
0.6%；Tert-butyl hydroperoxide, sodium formaldehyde sulphoxylate addition account for vinyl monomer respectively and always add quality (i.e. step (2)
(3) in add vinyl monomer total amount) 0.4%～0.6%.
Above-mentioned vinyl monomer is preferably in acrylic acid, butyl acrylate, methyl methacrylate, styrene, methacrylic acid
One or more combination.
Mentioned emulsifier is preferably the moon/nonionic composite emulsifier, in the moon/nonionic composite emulsifier anion emulsifier with non-from
The mass ratio of sub-emulsifying agent is preferably 1.5～2:1；Described anion emulsifier is preferably alkylol alkoxylate sodium sulfate salt, alkane
In yl diphenyl ether disulfonate, sodium lauryl sulphate, dodecylbenzene sodium sulfonate, disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate one
Planting or several combination, nonionic emulsifier is preferably alkylphenol polyoxyethylene, NPE ammonium sulfate, nonyl phenol
One or more combination in polyethylene oxide base ether.
Above-mentioned aqueous initiator is preferably potassium peroxydisulfate and/or Ammonium persulfate.；Oiliness initiator be preferably dibenzoyl peroxide and/
Or azodiisobutyronitrile.
Above-mentioned oiliness alkyd resin drier be preferably cobalt iso-octoate (6% cobalt), zirconium iso-octoate (9% zirconium), manganese iso-octoate (6% manganese),
One or more combination in calcium iso-octoate (6% calcium) and isooctoate of rare earth metal (8% rare earth), gold in oiliness alkyd resin drier
Genus accounts for the mass percent of alkyd resin and is preferably 0.1～1%.
Above-mentioned pH adjusting agent is preferably AMP-95, the 2-amino-2-methyl-1-propanol aqueous solution of mass percent concentration 95%.
The method have the benefit that:
The present invention uses seed emulsion polymerization, synthesis to have the alkyd-acrylate hybrid emulsion of nucleocapsid structure, and solids content reaches
To more than 45%, alkyd resin is 35～45:65～55 with the mass ratio of vinyl monomer, and alkyd resin proportion is high, cost
Low；Jointly adding during by oiliness drier with alkyd resin pre-emulsification, film dryness is fast, avoids drier to hydrolyze simultaneously；Hydridization
The concertedness of each component in body, film forming procedure need not coalescents or cosolvent, and film-forming temperature is low, good film-forming property, glossiness
Height, gained hybrid emulsion economy, environmental protection so that it is be with a wide range of applications.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
In being configured with thermometer, agitator, backflow cold flow equipment four-hole boiling flask, add refined Oleum Glycines 320g, Lithium hydrate
0.09g, opens stirring and condensed water, is warming up to 240 DEG C, adds 90g tetramethylolmethane, carries out ester exchange at 220 DEG C～240 DEG C anti-
Should.It is that 5:1 is as end-point of alcoholysis to sampling and measuring 95% ethanol tolerance (25 DEG C).It is subsequently adding phthalate anhydride 160g,
Dimethylbenzene 25g, is incubated 1h at 200 DEG C, is warmed up to 215～220 DEG C of insulation 2h, surveys acid number, viscosity.Acid number≤12mgKOH/g,
Viscosity 7～8s(measures with form pipe at 25 DEG C) after stop heating immediately, start cooling, temperature is down to 150 DEG C, releases oil
Water in water separator and backflow dimethylbenzene, decompression steams the dimethylbenzene in alkyd resin.Continue to be cooled to 60 DEG C, extract alkyd out
Resin, adds 42g n-decane, agitation and dilution under nitrogen protection, filters, prepare alkyd resin solution standby.
By the alkyd resin solution of above-mentioned for 170.5g preparation, 0.75g cobalt iso-octoate (cobalt content is 6%), 4.5g zirconium iso-octoate (zirconium
Content is 9%), 3.75g isooctoate of rare earth metal (content of rare earth is 8%), 6g acrylic acid, 46g methyl methacrylate, 46g benzene
Ethylene, 92g butyl acrylate and 6.7g dibenzoyl peroxide (BPO) add in paint mixing tank, are uniformly mixed.Then
Add 150g deionized water, 3.4g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 6.8g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate
Salt (DowFax2A1,45%) and 0.7g Ammonium persulfate., at room temperature through mulser high speed emulsifying 30min, in emulsion process,
Container is immersed in frozen water, keeps emulsion temperature below 30 DEG C, obtains alkyd resin pre-emulsion, standby.
By 0.2g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 0.5g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate salt (DowFax
2A1,45%), 5.3g methyl methacrylate, 5.3g styrene and 10.6g butyl acrylate join in 16g water, through breast
Change machine high speed emulsifying 20min, obtains vinyl monomer pre-emulsion, standby.
In the four-hole bottle equipped with reflux condenser, mechanical agitator, nitrogen access tube, Dropping funnel and thermometer, will
1.2gNaHCO3,190g deionized water, 0.8g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 1.2g dodecyl diphenyl oxide
Add in four-hole bottle after disulfonic acid sodium salt (DowFax2A1,45%) mix homogeneously.First in four-hole bottle, it is passed through nitrogen 5min, clearly
Except air, then under low rate mixing, it is warming up to 70 DEG C, adds above-mentioned prepared vinyl monomer pre-emulsion from Dropping funnel.Protect
After temperature 5min, (making mass percent with deionized water dissolving is 2% to add 11.2g ammonium persulfate aqueous solution from Dropping funnel
Content aqueous solution) in four-hole bottle.After emulsion is blue light, then it is warming up to 80 DEG C, by the above-mentioned pre-breast of prepared alkyd resin
Liquid loads in Dropping funnel, is slowly added dropwise, and about 3h adds, and in keeping bottle, temperature is in (80 ± 1) DEG C.90 DEG C it are warming up to after dripping off,
Insulation 1h.It is cooled to 65 DEG C, from Dropping funnel, adds 10.5g tert-butyl hydroperoxide aqueous solution (use deionized water dissolving system
Become 10% content aqueous solution), 65 DEG C of insulation 20min.Then from Dropping funnel, add 10.0g rongalite aqueous solution
(making 10% content aqueous solution with deionized water dissolving), 65 DEG C of insulation 30min.It is cooled to 30 DEG C, adds appropriate AMP-95
Regulation ph value of emulsion, to 7.0～7.5, filters, obtains alkyd-acrylate hybrid emulsion.Gained hybridisation emulsion solid content is 45.3%,
Viscosity 13.3 seconds (being coated with-4 glasss/25 DEG C).By emulsion be coated with on a glass, normal temperature self-drying 1h, light, without opalescence,
The transparent paint film of shadow without mist.Being not added with coalescents at 0 DEG C still can normal film forming.
Embodiment 2
In being configured with thermometer, agitator, backflow cold flow equipment four-hole boiling flask, add refined Oleum Glycines 320g, Lithium hydrate
0.09g, opens stirring and condensed water, is warming up to 240 DEG C, adds 90g tetramethylolmethane, carries out ester exchange at 220 DEG C～240 DEG C anti-
Should.It is that 5:1 is as end-point of alcoholysis to sampling and measuring 95% ethanol tolerance (25 DEG C).It is subsequently adding phthalate anhydride 160g,
Dimethylbenzene 25g, is incubated 1h at 200 DEG C, is warmed up to 215～220 DEG C of insulation 2h, surveys acid number, viscosity.Acid number≤12mgKOH/g,
Viscosity 7～8s(measures with form pipe at 25 DEG C) after stop heating immediately, start cooling, temperature is down to 150 DEG C, releases oil
Water in water separator and backflow dimethylbenzene, decompression steams the dimethylbenzene in alkyd resin.Continue to be cooled to 60 DEG C, extract resin out,
Add 37g n-decane and 6g polymethyl methacrylate, agitation and dilution under nitrogen protection, filter, prepare alkyd resin solution
Standby.
By the alkyd resin solution of above-mentioned for 170.5g preparation, 0.75g cobalt iso-octoate (6% cobalt), 4.5g zirconium iso-octoate (9% zirconium),
3.75g isooctoate of rare earth metal (8% rare earth), 6g acrylic acid, 55.2g methyl methacrylate, 36.8g styrene, 92g propylene
Acid butyl ester and 6.7g dibenzoyl peroxide (BPO) add in paint mixing tank, are uniformly mixed.It is subsequently adding 150g deionization
Water, 3.4g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 6.8g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate salt (DowFax2A1,45%)
And 0.7g Ammonium persulfate., at room temperature through mulser high speed emulsifying 30min, in emulsion process, container is immersed in frozen water, keeps
Emulsion temperature, below 30 DEG C, obtains alkyd resin pre-emulsion, standby.
By 0.2g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 0.5g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate salt (DowFax
2A1,45%), 6.4g methyl methacrylate, 4.2g styrene and 10.6g butyl acrylate join in 16g water, through breast
Change machine high speed emulsifying 20min, obtains vinyl monomer pre-emulsion, standby.
In the four-hole bottle equipped with reflux condenser, mechanical agitator, nitrogen access tube, Dropping funnel and thermometer, will
1.2gNaHCO3,190g deionized water, 0.8g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 1.2g dodecyl diphenyl oxide
Add in four-hole bottle after disulfonic acid sodium salt (DowFax2A1,45%) mix homogeneously.First in four-hole bottle, it is passed through nitrogen 5min, clearly
Except air, then under low rate mixing, it is warming up to 70 DEG C, adds above-mentioned prepared vinyl monomer pre-emulsion from Dropping funnel.Protect
After temperature 5min, (making mass percent with deionized water dissolving is 2% to add 11.2g ammonium persulfate aqueous solution from Dropping funnel
Content aqueous solution) in four-hole bottle.After emulsion is blue light, then it is warming up to 80 DEG C, by the above-mentioned pre-breast of prepared alkyd resin
Liquid loads in Dropping funnel, is slowly added dropwise, and about 3h adds, and in keeping bottle, temperature is in (80 ± 1) DEG C.90 DEG C it are warming up to after dripping off,
Insulation 1h.It is cooled to 65 DEG C, from Dropping funnel, adds 10.5g tert-butyl hydroperoxide aqueous solution (use deionized water dissolving system
Become 10% content aqueous solution), 65 DEG C of insulation 20min.Then from Dropping funnel, add 10.0g rongalite aqueous solution
(making 10% content aqueous solution with deionized water dissolving), 65 DEG C of insulation 30min.It is cooled to 30 DEG C, adds appropriate AMP-95
Regulation ph value of emulsion, to 7.0～7.5, filters, obtains alkyd-acrylate hybrid emulsion.Gained hybridisation emulsion solid content is 45.4%,
Viscosity 13.3 seconds (being coated with-4 glasss/25 DEG C).By emulsion be coated with on a glass, normal temperature self-drying 1h, light, without opalescence,
The transparent paint film of shadow without mist.Being not added with coalescents at 0 DEG C still can normal film forming.
Embodiment 3
In being configured with thermometer, agitator, backflow cold flow equipment four-hole boiling flask, add refined Oleum Glycines 320g, Lithium hydrate
0.09g, opens stirring and condensed water, is warming up to 240 DEG C, adds 90g tetramethylolmethane, carries out ester exchange at 220 DEG C～240 DEG C anti-
Should.It is that 5:1 is as end-point of alcoholysis to sampling and measuring 95% ethanol tolerance (25 DEG C).It is subsequently adding phthalate anhydride 160g,
Dimethylbenzene 25g, is incubated 1h at 200 DEG C, is warmed up to 215～220 DEG C of insulation 2h, surveys acid number, viscosity.Acid number≤12mgKOH/g,
Viscosity 7～8s(measures with form pipe at 25 DEG C) after stop heating immediately, start cooling, temperature is down to 150 DEG C, releases oil
Water in water separator and backflow dimethylbenzene, decompression steams the dimethylbenzene in alkyd resin.Continue to be cooled to 60 DEG C, extract resin out,
Add 42g n-decane, agitation and dilution under nitrogen protection, filter, prepare alkyd resin solution standby.
By dilute to the alkyd resin solution of above-mentioned for 141.6g preparation, 0.70g cobalt iso-octoate, 4.0g zirconium iso-octoate, 3.2g isooctyl acid
Soil, 6.6g acrylic acid, 51.7g methyl methacrylate, 51.8g styrene, 103.5g butyl acrylate and 6.9g peroxidating
Dibenzoyl (BPO) adds in paint mixing tank, is uniformly mixed.It is subsequently adding 143g deionized water, 3.4g polyoxyethylene nonyl phenyl
Change vinyl ethers (OP-10), 6.8g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate salt (DowFax2A1,45%) and 0.8g persulfuric acid
Ammonium, at room temperature through mulser high speed emulsifying 30min, in emulsion process, container is immersed in frozen water, keeps emulsion temperature to exist
Less than 30 DEG C, obtain alkyd resin pre-emulsion, standby.
By 0.25g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 0.5g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate salt (DowFax
2A1,45%), 5.7g methyl methacrylate, 5.8g styrene and 11.5g butyl acrylate join in 16.2g water, warp
Mulser high speed emulsifying 20min, obtains vinyl monomer pre-emulsion, standby.
In the four-hole bottle equipped with reflux condenser, mechanical agitator, nitrogen access tube, Dropping funnel and thermometer, will
1.3gNaHCO3,190g deionized water, 0.8g polyoxyethylene nonyl phenyl vinyl ethers (OP-10), 1.2g dodecyl diphenyl oxide
Add in four-hole bottle after disulfonic acid sodium salt (DowFax2A1,45%) mix homogeneously.First in four-hole bottle, it is passed through nitrogen 5min, clearly
Except air, then under low rate mixing, it is warming up to 70 DEG C, adds above-mentioned prepared vinyl monomer pre-emulsion from Dropping funnel.Protect
After temperature 5min, (making mass percent with deionized water dissolving is 2% to add 12.0g ammonium persulfate aqueous solution from Dropping funnel
Content aqueous solution) in four-hole bottle.After emulsion is blue light, then it is warming up to 80 DEG C, by the above-mentioned pre-breast of prepared alkyd resin
Liquid loads in Dropping funnel, is slowly added dropwise, and about 3h adds, and in keeping bottle, temperature is in (80 ± 1) DEG C.90 DEG C it are warming up to after dripping off,
Insulation 1h.It is cooled to 65 DEG C, from Dropping funnel, adds 10.5g tert-butyl hydroperoxide aqueous solution (use deionized water dissolving system
Become 10% content aqueous solution), 65 DEG C of insulation 20min.Then from Dropping funnel, 10.5g sodium formaldehyde sulphoxylate is added water-soluble
Liquid (makes 10% content aqueous solution with deionized water dissolving), 65 DEG C of insulation 30min.It is cooled to 30 DEG C, adds appropriate AMP-95
Regulation ph value of emulsion, to 7.0～7.5, filters, obtains alkyd-acrylate hybrid emulsion.Gained hybridisation emulsion solid content is 45.5%,
Viscosity 14.1 seconds (being coated with-4 glasss/25 DEG C).By emulsion be coated with on a glass, normal temperature self-drying 1h, light, without opalescence,
The transparent paint film of shadow without mist.Being not added with coalescents at 0 DEG C still can normal film forming.
Claims (4)
1. the preparation method of an alkyd-acrylate hybrid emulsion, it is characterised in that comprise the following steps:
(1) prepared by alkyd resin: prepare the air-drying property alkyd resin containing unsaturated double-bond with drying oil and tetramethylolmethane for raw material,
Oil content 45～65%, acid number≤12mgKOH/g, viscosity 7～8s；
(2) alkyd resin pre-emulsification: add oiliness alkyd resin drier, oiliness in alkyd resin prepared by step (1)
Initiator and vinyl monomer, be uniformly mixed；It is subsequently adding deionized water, emulsifying agent and aqueous initiator, at room temperature
Through mulser high speed emulsifying, in emulsion process, container is immersed in frozen water, keeps steady temperature, obtains alkyd resin pre-emulsion, standby
With；
(3) vinyl monomer pre-emulsification: after emulsifying agent, vinyl monomer, deionized water mix homogeneously, through mulser at a high speed
Disperse 10～20 minutes, obtain vinyl monomer pre-emulsion, standby；
(4) prepared by alkyd-acrylate hybrid emulsion: equipped with condenser, mechanical agitator, nitrogen access tube, separatory leakage
In the four-hole bottle of bucket and thermometer, first it is passed through nitrogen and removes air, then by NaHCO3, deionized water, emulsifying agent add four mouthfuls
In Ping, under agitation it is warming up to 70 DEG C, adds vinyl monomer pre-emulsion, after insulation 5min, add aqueous initiator,
To the seed emulsion in blue light；Then it is warming up to 80 DEG C, under insulation, is added dropwise to alkyd resin pre-emulsion, then heats to 90 DEG C
Insulation 1h；It is cooled to 65 DEG C again, is initially charged tert-butyl hydroperoxide, be incubated 20min, add rongalite, protect
Temperature 30in；Finally it is cooled to 30 DEG C, with pH adjusting agent regulation ph value of emulsion to 7-8, filters, packaging；
Described in step (1), the preparation process of alkyd resin is as follows:
(101) alcoholysis: refined Oleum Glycines and tetramethylolmethane are carried out ester exchange reaction at 220 DEG C～240 DEG C, dense to sampling and measuring
Spend 25 DEG C of tolerances of 95% ethanol for (3～5): 1 as end-point of alcoholysis；
(102) esterification: continuously add phthalate anhydride and dimethylbenzene, is incubated 1h at 200 DEG C, is then warmed up to 215～220 DEG C
Insulation 2h, surveys acid number, viscosity, as acid number≤12mgKOH/g, and after being 7～8s at 25 DEG C with form pipe estimated viscosity, vertical
I.e. stopping heating, start cooling, temperature is down to 150 DEG C, and decompression steams the dimethylbenzene in alkyd resin；It is cooled to 60 DEG C again,
Extract alkyd resin out, add alkyd resin weight 7～the water-repelling agent of 10%, agitation and dilution under nitrogen protection, filter standby；
Refined Oleum Glycines is (3～4) with the mass ratio of tetramethylolmethane: 1；Phthalate anhydride, the addition of dimethylbenzene and tetramethylolmethane
Mass ratio be (1.5～2): (0.2～0.3): 1；
Described water-repelling agent is the one or more combination in hexadecane, n-decane, hexadecanol or polymethyl methacrylate；
In step (2): described alkyd resin, oiliness alkyd resin drier, oiliness initiator and the mass ratio of vinyl monomer
For (40～50): (2～3): (1～2): (45～55)；Vinyl monomer, deionized water, emulsifying agent and aqueous cause
The mass ratio of agent is (45～55): (35～45): (2～3): (0.1～0.3)；In step (3): described emulsifying agent,
The mass ratio of vinyl monomer and deionized water is (0.5～0.8): (20～25): (15～20)；In step (4): NaHCO3、
Deionized water, emulsifying agent are (1～1.5) with the mass ratio of vinyl monomer pre-emulsion: (150～200): (1.5～3):
(35～45)；Aqueous initiator addition accounts for the 0.3%～0.6% of vinyl monomer pre-emulsion quality；Tert-butyl hydroperoxide,
Rongalite addition accounts for vinyl monomer respectively and always adds the 0.4%～0.6% of quality；
Described vinyl monomer is the combination of butyl acrylate and methyl methacrylate；
Described oiliness alkyd resin drier is in cobalt iso-octoate, zirconium iso-octoate, manganese iso-octoate, calcium iso-octoate and isooctoate of rare earth metal
One or more combination, in oiliness alkyd resin drier, metal accounts for the mass percent of alkyd resin is 0.1～1%.
The preparation method of a kind of alkyd-acrylate hybrid emulsion the most according to claim 1, it is characterised in that: described
Emulsifying agent is the moon/nonionic composite emulsifier, anion emulsifier and the matter of nonionic emulsifier in the moon/nonionic composite emulsifier
Amount ratio is 1.5～2:1；Described anion emulsifier be alkylol alkoxylate sodium sulfate salt, alkyl diphenyl ether disulfonate, ten
One or more combination in sodium dialkyl sulfate, dodecylbenzene sodium sulfonate, disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate, nonionic
Emulsifying agent be the one in alkylphenol polyoxyethylene, NPE ammonium sulfate, polyoxyethylene nonyl phenyl vinyl ethers or
Several combinations.
The preparation method of a kind of alkyd-acrylate hybrid emulsion the most according to claim 1, it is characterised in that: described
Aqueous initiator is potassium peroxydisulfate and/or Ammonium persulfate.；Oiliness initiator is dibenzoyl peroxide and/or azodiisobutyronitrile.
The preparation method of a kind of alkyd-acrylate hybrid emulsion the most according to claim 1, it is characterised in that: described
PH adjusting agent is the 2-amino-2-methyl-1-propanol aqueous solution of mass percent concentration 95%.
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| CN114686080B (en) * | 2022-03-24 | 2023-06-30 | 上海阿宝实业有限公司 | Alkyd paint and preparation method thereof |
| CN115322302A (en) * | 2022-08-25 | 2022-11-11 | 上海保立佳化学技术有限公司 | Preparation method and application of acrylic acid alkyd hybrid emulsion |
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| Title |
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| 醇酸-丙烯酸酯杂化乳液的合成及表征;王兆安等;《中国涂料》;20130331;第28卷(第3期);第56-58、62页 * |
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