CN105384864B - A kind of multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature and preparation method thereof and using the lotion as the aqueous woodware paint of base-material - Google Patents

A kind of multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature and preparation method thereof and using the lotion as the aqueous woodware paint of base-material Download PDF

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CN105384864B
CN105384864B CN201510957083.8A CN201510957083A CN105384864B CN 105384864 B CN105384864 B CN 105384864B CN 201510957083 A CN201510957083 A CN 201510957083A CN 105384864 B CN105384864 B CN 105384864B
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monomer
room temperature
emulsion
acrylate
ester copolymer
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CN105384864A (en
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田海水
李成林
田海宁
王淑柳
孙志勇
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Hengshui Xinguang New Mstar Technology Ltd
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    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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    • C08F2/16Aqueous medium
    • C08F2/22Emulsion polymerisation
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    • C08F2/12Polymerisation in non-solvents
    • C08F2/16Aqueous medium
    • C08F2/22Emulsion polymerisation
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    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10Esters
    • C08F220/12Esters of monohydric alcohols or phenols
    • C08F220/16Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
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    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
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    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • C09D133/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • C09D133/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
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    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10Esters
    • C08F220/12Esters of monohydric alcohols or phenols
    • C08F220/16Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10Esters
    • C08F220/12Esters of monohydric alcohols or phenols
    • C08F220/16Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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Abstract

The embodiment of the invention discloses multiple self-crosslinking nano acrylic ester copolymer emulsion of a kind of room temperature and preparation method thereof and using the lotion as the aqueous woodware paint of base-material, the synthetic ingredient for preparing of the lotion includes vinyl unsaturated carboxylic acid, methacrylate, acrylate, styrene, modified SiO2With dispersion liquid, cross-linking monomer A, vinylsiloxane, the cross-linking monomer B of acrylate monomer etc., and by introducing modified Nano SiO2, cross-linking monomer, three kinds of cross-linking methods of vinylsiloxane through the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature preparation in; three kinds of crosslinking technologicals mutually cooperate with; so that finally forming fine and close protective film as aqueous woodware paint prepared by base-material using the lotion; with excellent water-fast, resistance to alcohol, scratch resistance, resistant to high temperatures after-tack and relatively high hardness, paint film property can compare favourably with solvent type furniture lacquer.

Description

A kind of multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature and preparation method thereof With using the lotion as the aqueous woodware paint of base-material
Technical field
The present invention relates to a kind of lotion and using the lotion as the aqueous woodware paint of base-material more particularly to a kind of room temperature it is multiple from Cross-linked acrylic acid ester copolymer emulsion and using the lotion as the aqueous woodware paint of base-material, belongs to environmental protection base Material Field.
Background technique
China is manufacture type big country, with economic expansion sexual development, the whole nation of the severe haze of environmental pollution and atmosphere Property outburst seriously threatened the environment that compatriots depend on for existence, and the VOC in coating and adhesive leads to the serious haze of atmosphere The vertical chief culprit of crime, is the most important thing for causing haze.Although comprehensive performance after current woodcare paint Water-borne modification is still molten not as good as traditional Dosage form paint, but because its is pollution-free, Environmental Safety and meets national environmental protection policy, it has also become the inevitable development trend of woodcare paint, Especially China's new legislation for having promulgated coating industry in the end of the year 2014 and new legislation are aqueous after on 2 1st, 2015 comes into effect The Water-borne modification of coating or coating has become the key of Enterprise's Sustainable Development, and former solvent based coating enterprise will gradually be eliminated.Numerous cities City has also accordingly promulgated tightened up regulation, and solvent based coating and solvent type adhesive have been tightly controlled use, therefore develop It develops excellent combination property, substitute the aqueous coating resins of traditional solvent-borne woodcare paint with boundless application prospect and society It can benefit.
At present aqueous woodware paint base resin material research and development and application still based on emulsified acrylic acid ester copolymer, Compared with solvent wood coatings, water-borne wood coating is in the side such as coating film gloss degree, richness, hardness, scratch resistance and wearability Face all has a certain distance, this is also to restrict the major reason of water-borne wood coating development always, therefore how to improve water and milk The performances such as hardness, scratch resistance, wearability, gloss and the rate of drying of type acrylate copolymer become current woodcare paint Water-borne modification Key technology factor.It is made with Diacetone Acrylamide/adipic dihydrazide cross-linking system merely in patent CN201410238123 Lotion cause crosslink density low, thus with the hardness of woodcare paint made from such lotion since dosage of crosslinking agent cannot be too big Only only reach to HB grades.Patent CN200910187305 relates to a kind of core-shell emulsion, wherein vinylsiloxane is added in shell The aqueous woodware paint of preparation, but final hardness also can only achieve H grades, the requirement far below Wooden furniture paint to hardness.Even if DSM N. V. leading in the world, hardness, the scratch resistance of the commercially available aqueous woodware paint acrylate copolymer emulsion of the Dow Chemical Company etc. Performance is also not as good as traditional solvent type woodcare paint.
Due to Nano-meter SiO_22High reaction activity, high-specific surface area and excellent thixotropy, cause make it paint field Using a kind of most nano materials.Nano-meter SiO_22Can be improved in coating the hardness of organic polymer, improve its wearability, Scratch resistance, ultravioletlight screening performance or even thixotropy have become industry common recognition.But how powder nanometer silica is aqueous Realize that good dispersion is always worldwide problem in coating.Therefore, many R&D institutions are all being dedicated to in-situ nano How the exploitation of enhancing technology, i.e., be produced in situ in nanometer titanium dioxide silicon structure in acrylic acid ester emulsion polymerization process, or how Preparing emulsion-type nano silica composite dispersion becomes the developing direction of coating industry.Research has shown that in aqueous wooden ware Nano-meter SiO_2 is introduced in paint lotion2Preparation takes into account organic and inorganic characteristic nano-composite emulsion, realizes Nano-meter SiO_22In acrylic acid Fine dispersion in ester polymer obtains high rigidity, high transparency, Qiang Shushui, the wood protection of the excellent combination properties such as high heat resistance Material.
Reasonable application of the crosslinking technological in coating simultaneously is also a kind of strong hand for improving woodcare paint paint film comprehensive performance Section.Introducing in polymer molecular chain can have been adjusted in lotion and pH value and then crosslinking has been added singly with post-crosslinking function monomer Body mutually merges between latex particle as system pH gradually decreases, the function list in cross-linking monomer and polymer molecular chain Self-crosslinking occurs for body, and the mode of this self-crosslinking improves hardness of paint film, scratch resistance capability significantly.But if using not conforming to Reason, the internal stress that will lead to paint film and substrate increase, and not only adhesive force declines, and water-resistant capacity can also simultaneously decline.
Summary of the invention
In order to solve the above technical problems, a kind of multiple self-crosslinking acrylic ester copolymerization of room temperature is provided in the embodiment of the present invention Object lotion and preparation method thereof, and aqueous woodware paint is prepared using the acrylate copolymer emulsion as base-material, it finally obtains high hard Degree, high transparency, Qiang Shushui, the aqueous woodware paint of the excellent combination properties such as high heat resistance.
The multiple self-crosslinking nano acrylic ester copolymer emulsion of a kind of room temperature provided in the embodiment of the present invention, by following The preparation synthesis of parts by weight substance:
40~50 parts of deionized water;0.1~1 part of emulsifier A;0.1~1 part of emulsifier B;PH buffer 0.02~ 0.09 part;0.3 part of initiator;0.3~0.9 part of vinyl unsaturated carboxylic acid;25~35 parts of methacrylate;Acrylate 4 ~6 parts;4~6 parts of styrene;Modified SiO2With 8~12 parts of dispersion liquid of acrylate monomer;Cross-linking monomer A 0.3~1.0 Part;0.1~0.9 part of vinylsiloxane;0.3~1.0 part of cross-linking monomer B;0.04 part of tert-butyl hydroperoxide;Bisulfite 0.04 part of sodium;0.05 part of defoaming agent;0.05 part and 1 part of ammonium hydroxide of preservative.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the modified SiO2With The dispersion liquid of acrylate monomer is using ethyl orthosilicate as silica precursor, and acrylate monomer is decentralized medium, dilute Sulfuric acid is catalyst, and it is small to be stirred at room temperature 24 as active graft modification agent for γ-methacryloxypropyl trimethoxy silane When hydrolysis be made.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the cross-linking monomer A Selected from one of Diacetone Acrylamide, glycidyl methacrylate, acetoacetate methacrylic acid glycol ester or It is several;The cross-linking monomer B selects one of two hydrazine of adipic acid, carbon acid dihydrazide, careless acid dihydrazide, succinic acid hydrazide ii.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the vinyl silicon oxygen Alkane is selected from vinyltriethoxysilane, vinyltrimethoxysilane, γ-methacryloxypropyl trimethoxy silane One of.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the vinyl insatiable hunger One of acrylic acid, methacrylic acid, itaconic acid are selected from carboxylic acid.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the methacrylic acid Ester is selected from one of butyl methacrylate, methyl methacrylate, 2-Propenoic acid, 2-methyl-, octyl ester.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the acrylate choosing From one of butyl acrylate, ethyl acrylate, 2-ethyl hexyl acrylate.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the emulsifier A is Anionic surfactant is selected from sodium laureth sulfate, alkyl phenol polyoxyethylene ether ammonium sulfate, detergent alkylate Sulfonic acid, dodecyl benzene sulfonic acid ammonium, sodium laurate, ammonium laurate, lauryl sodium sulfate, ammonium lauryl sulfate, alkyl two Phenylate disodium sulfonate salt, alkyl polyoxyethylene acyl sodium sulfonate, tributyl phenol sodium sulfonate of ethoxylated, allyl polyethenoxy ether One of derivative ammonium sulfate and allyl polyethenoxy ether ammonium sulfate;The emulsifier B is selected from alkyl polyoxyethylene ether system Column environment-friendly type nonionic emulsifier, alkyl alcohol ethoxylates series, the compound of alkyl phenol polyoxyethylene ether, fatty alcohol polyoxy One of vinethene, alkyl phenol polyoxyethylene ether.
Preferably, the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, wherein the pH adjusting agent For selected from one of sodium bicarbonate, ammonium hydrogen carbonate, sodium dihydrogen phosphate;The initiator is selected from ammonium persulfate, potassium peroxydisulfate Or one of sodium peroxydisulfate.
The method for preparing the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature, includes the following steps:
(1) modified SiO is prepared2With the dispersion liquid of acrylate monomer: emulsifier A and deionized water are weighed in beaker, Sufficiently dissolution is stirred with glass bar, obtains emulsifier aqueous solution;Then suitable ethyl orthosilicate, γ-methacryloxypropyl are weighed Base propyl trimethoxy silicane is dissolved in the mix monomer of methyl methacrylate and butyl acrylate, obtains oil mixture; Then under being vigorously stirred of high-shear homogenizer, the oil mixture is added dropwise into above-mentioned emulsifier aqueous solution, is used in combination Dilute sulfuric acid adjusts pH value, continues high speed dispersion 30min, is transferred in the ground boiling flask with plug therewith, at room temperature magnetic force Stirring 24 hours, reacts it sufficiently, obtains modified SiO2With the dispersion liquid of acrylate monomer;
(2) it prepares nano-composite emulsion: deionized water is added in four round flask, is subsequently placed in stirring in water bath and rises Temperature takes the potassium peroxydisulfate of 2/5 reaction dosage to be dissolved in 5g deionized water, adds round-bottomed flask, then when temperature reaches 75 DEG C At the uniform velocity 1/5 modification SiO of a dropping step (1) preparation in 10min2Enter round-bottomed flask with the dispersion liquid of acrylate monomer, to When blue light occurs in reaction solution in flask, remaining 3/5 potassium peroxydisulfate is dissolved in 5g deionized water, then by its with it is remaining Modified SiO2It is added dropwise in round-bottomed flask simultaneously with the dispersion liquid of acrylate monomer, is dripped in about 3 hours, then keep the temperature 1 Hour, nano-composite emulsion is made;
(3) prepare monomer pre-emulsion: by deionized water, emulsifier A, emulsifier B and vinyl unsaturated carboxylic acid, Methacrylate, acrylate, styrene and crosslinking agent A successively put into monomer pre-emulsification tank, and high-speed stirred emulsifies 1 hour shape At monomer pre-emulsion;
(4) it prepares the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature: adding deionized water, metering into polymeric kettle The step of (2) preparation nano-composite emulsion, open stirring, be warming up to 80 DEG C -84 DEG C, after stablizing 15min, while a dropping step (3) the monomer pre-emulsion and ammonium persulfate solution prepared in stops being added dropwise when being added drop-wise to residual monomer pre-emulsion 1/5; Vinylsiloxane monomer stirring 10min is added to continue to be added dropwise later, controls entire time for adding in 210min-240min, Dropping temperature is controlled at 78 DEG C -82 DEG C;1 hour is kept the temperature under dropping temperature after being added dropwise;Be cooled to after heat preservation 60 DEG C- 70 DEG C, add tert-butyl hydroperoxide aqueous solution, aqueous solution of sodium bisulfite is added dropwise after 10min, time for adding 30min is added dropwise Temperature control at 63 DEG C -67 DEG C, subsequent continuation of insurance temperature 30min is added dropwise, be finally cooled to 40 DEG C hereinafter, with ammonium hydroxide adjusting pH to 7-9, be added metering crosslinking agent B stirring 30min, then plus defoaming agent, preservative after, with 200-500 mesh filter screen filter, preparation room The multiple self-crosslinking nano acrylic ester copolymer emulsion of temperature.
It, should using the aqueous woodware paint that the multiple self-crosslinking nano acrylic ester copolymer emulsion of above-mentioned room temperature is prepared as base-material The composition of aqueous woodware paint includes each component of following parts by weight:
16 parts of deionized water;75 parts of lotion;0.3 part of wetting agent;0.3 part of levelling agent;4 parts of dipropylene;Dipropyl two 4 parts of alcohol methyl ether;0.3 part of thickener;0.05 part of defoaming agent;0.05 part of preservative;0.1 part of dispersing agent;2.5 parts of scratching resistant and hard 5 parts of resin acid zinc.
The present invention combines silicone hydroxyl condensation cross-linking technology with ketone hydrazine crosslinking technological, solves because of excessive vinyl silicon oxygen The introducing of alkane cause remaining silicone hydroxyl excessive and the problem of water resistance decline, wet adhesion decline;It solves simultaneously excessive The problem of resistance to water-white ability difference caused by the introducing of Diacetone Acrylamide;The multiple self-crosslinking nano acrylic ester copolymer of room temperature The internal silica hydrolyzed of micelle of lotion cream floats on surface on the procedure division that aqueous woodware paint forms a film, due to silicon The hardness of aqueous woodware paint paint film, easy to polish property can be enhanced in particularity, its presence;Preparing nano acrylic ester copolymer Polymerizable self-cross linking monomer during lotion cream, can introduce polymer chain and form flexible crosslinkable polymer, be crosslinked Elastomeric polymer i.e. be easily deformed and have good resilience, so nano acrylic ester copolymer emulsion of the invention oneself Crosslinked emulsions film adhesion strength with higher.
Compared with the existing technology, the invention has the following beneficial effects:
(1) Nano-meter SiO_2 is introduced in the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature2Preparation have both it is organic and The acrylic emulsion of inorganic characteristic, then prepares aqueous woodware paint by base-material of the lotion, and finally obtained woodcare paint paint film is high Hardness, high transparency, Qiang Shushui, high heat resistance;
(2) the introducing crosslinked monomer in the multiple self-crosslinking nano acrylic ester copolymer emulsion polymerization process of room temperature, then Aqueous woodware paint is prepared using the lotion as base-material, further occurrence is crosslinked and forms fine and close protection in woodcare paint film forming procedure Film further improves the hardness of woodcare paint paint film, water resistance, resistance to alcohol, resistant to high temperatures after-tacks and scratch resistant ability;
(3) vinylsiloxane is introduced in the later period of the multiple self-crosslinking nano acrylic ester copolymer emulsion polymerization of room temperature, Then aqueous woodware paint is prepared using the lotion as base-material, in woodcare paint film forming procedure, unhydrolysed part silicon oxygen bond and pigment, base Material and the silicon oxygen bond condensation of itself, further increase the crosslink density of woodcare paint paint film;
(4) three of the above cross-linking method through the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature preparation in, Three kinds of crosslinking technologicals mutually cooperate with, and finally form fine and close protective film as aqueous woodware paint prepared by base-material using the lotion, have Excellent water-fast, resistance to alcohol, resistant to high temperatures after-tacks and relatively high hardness, paint film property can be with solvent type furniture lacquers scratch resistance It compares favourably.
Specific embodiment
Below in conjunction with the table in the embodiment of the present invention and embodiment, technical solution in the embodiment of the present invention into Clear, the complete description of row, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole realities Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts Every other embodiment, shall fall within the protection scope of the present invention.
The present invention is with ethyl orthosilicate (TS) for SiO2Precursor, acrylate (BA) monomer are decentralized medium, γ-methyl Acryloyloxypropyltrimethoxysilane (A174) is active graft modification agent, is made under dilute sulfuric acid catalysis with acrylate For the SiO of continuous phase2/ acrylate monomer dispersion liquid (TM) then carries out emulsion polymerization, system by seed monomer of the dispersion liquid It is able to the nano-composite emulsion that polyacrylate is carrier, then again using the nano-composite emulsion as seed, acrylic acid is added Ester, methacrylate, styrene, cross-linking monomer, vinyl unsaturated carboxylic acid mix monomer, can through seeded emulsion polymerization Obtain a kind of multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature;And using the acrylate copolymer emulsion as base-material system Standby aqueous woodware paint, finally obtains high rigidity, high transparency, Qiang Shushui, the aqueous woodware paint of the excellent combination properties such as high heat resistance.
Embodiment 1
The multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature is prepared, dosage of each component is as shown in table 1:
Table 1
(1) monomer pre-emulsion is prepared: by metering system described in deionized water, emulsifier A, emulsifier B and table 1 Acid, methyl methacrylate, butyl acrylate, styrene and crosslinking agent A successively put into monomer pre-emulsification tank, high-speed stirred emulsification 1 hour formation monomer pre-emulsion;
(2) the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature is prepared: to polymeric kettle plus deionized water, metering Nano-composite emulsion opens stirring, is warming up to 80 DEG C -84 DEG C, after stablizing 15min, while the monomer prepared in a dropping step (1) Pre-emulsion and ammonium persulfate solution stop being added dropwise when being added drop-wise to residual monomer pre-emulsion 1/5;Three second of vinyl is added Continue to be added dropwise after oxysilane monomer stirring 10min, controls entire time for adding in 210min-240min, dropping temperature Control is at 78 DEG C -82 DEG C;1 hour is kept the temperature under dropping temperature after being added dropwise;It is cooled to 60 DEG C -70 DEG C after heat preservation, adds Aqueous solution of sodium bisulfite, time for adding 30min, dropping temperature control are added dropwise after 10min for tert-butyl hydroperoxide aqueous solution At 63 DEG C -67 DEG C, subsequent continuation of insurance temperature 30min is added dropwise, is finally cooled to 40 DEG C hereinafter, adjusting pH to 7-9, addition with ammonium hydroxide The crosslinking agent B of metering stirs 30min, then plus defoaming agent, preservative after, filtered with 200-500 mesh filter screen, preparation room temperature it is multiple from Crosslinking nano acrylate copolymer emulsion.
The preparation method is the same as that of Example 1 for the multiple self-crosslinking nano acrylic ester copolymer emulsion of the former room temperature of embodiment 2-6, tool Body raw material and dosage are as shown in table 1.Wherein emulsifier A is also an option that sodium laureth sulfate, alkyl phenol polyoxy Ethylene ether ammonium sulfate, dodecyl benzene sulfonic acid, dodecyl benzene sulfonic acid ammonium, sodium laurate, ammonium laurate, dodecyl sulphate Ammonium, alkyl diphenyl ether disodium sulfonate salt, tributyl phenol sodium sulfonate of ethoxylated, allyl polyethenoxy ether derivative ammonium sulfate One or more of with allyl polyethenoxy ether ammonium sulfate;Emulsifier B is also an option that alkyl polyoxyethylene ether series of loops Guarantor's type nonionic emulsifier, alkyl alcohol ethoxylates series, the compound of alkyl phenol polyoxyethylene ether, aliphatic alcohol polyethenoxy One of ether, alkyl phenol polyoxyethylene ether are several;Cross-linking monomer A is also an option that acetoacetate methacrylic acid second two Alcohol ester;The cross-linking monomer B is also an option that one or both of carbon acid dihydrazide, careless acid dihydrazide.
Wherein, the weight consumption of each component needed for the preparation of nano-composite emulsion described in embodiment 1-6 such as the following table 2 institute Show:
Table 2
MMA BA TS A174 Emulsifier A Deionized water PPS Deionized water
30.00 30.00 15.00 2.00 3.50 65.00 0.5 170
Nano-composite emulsion the preparation method is as follows:
(1) modified SiO is prepared2With the dispersion liquid (TM) of acrylate monomer: in 100mL beaker weighing emulsifier A3.50g and deionized water 65.00g stirs sufficiently dissolution with glass bar, obtains emulsifier aqueous solution;Then 15.00g is weighed just Silester (TS), γ-methacryloxypropyl trimethoxy silane (A174) of 2.00g are dissolved in the methyl-prop of 30.00g In the mix monomer of the butyl acrylate (BA) of e pioic acid methyl ester (MMA) and 30.00g, oil mixture is obtained;Then equal in high speed Under being vigorously stirred of matter machine, the oil mixture is added dropwise into above-mentioned emulsifier aqueous solution, and adjusts pH with dilute sulfuric acid Value continues high speed dispersion 20min, is transferred in the 150mL ground boiling flask with plug therewith, magnetic agitation 24 is small at room temperature When, it reacts it sufficiently, obtains preparing modified SiO2With the dispersion liquid of acrylate monomer, it is denoted as TM;
(2) it prepares nano-composite emulsion: 160g deionized water is added in 250mL four round flask, is subsequently placed in water-bath It stirs and heats up, when temperature reaches 75 DEG C, 2/5 potassium peroxydisulfate (PPS) is taken to be dissolved in 5g deionized water, add round bottom burning Bottle, 1/5 modification SiO is at the uniform velocity added dropwise in 10min2With the dispersion liquid (TM) of acrylate monomer, when there is blue light in reaction solution, Remaining 3/5 PPS is dissolved in 5g deionized water, is then added dropwise to it in round-bottomed flask simultaneously with remaining TM, about 3 is small When it is interior drip, then keep the temperature 1 hour, form the nano-composite emulsion of curing, the emulsion solid content 20% or so.
Embodiment 7
Waterborne wood is prepared as base-material using the multiple self-crosslinking acrylic ester copolymer emulsion of room temperature of above-described embodiment 1-6 synthesis Device paint.The concrete component and dosage of the aqueous woodware paint are as shown in table 3.
Table 3
(1) lotion of the formula ratio that it is as shown in the table, dispersing agent, wetting agent, levelling agent, anti-zoned is added in a stirred tank Hurt agent, zinc stearate is added in above-mentioned stirred tank, with revolving speed 900r/min stir 10min, obtain uniform dispersion;
(2) coalescing agent dipropylene glycol methyl ether (DPM), the dipropylene of formula ratio are taken in another stirred tank (DPnB), deionized water and thickener RS-8W (polyurethane-modified class) are added in stirred tank and stir 10min, obtain mixed liquor;
(3) mixed liquor in step (2) in stirred tank is slowly added into step (1) stirred tank, with revolving speed 700r/ Min is added while stirring, stirs 10min;It is eventually adding defoaming agent, is again stirring for 10min, obtains uniform aqueous woodware paint, It filters and packages.
Embodiment 8-12 preparation prepares Waterborne wood by base-material of the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature For the preparation method of device paint with embodiment 7, specific raw material and dosage are as shown in table 3.
Its performance detection knot of the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature of 1-6 of embodiment of the present invention preparation Fruit parameter is shown in Table 4, and the aqueous woodware paint performance test results prepared using this lotion as substrate are as shown in table 5.
Table 4
Table 5
By table 4 and table 5 it is found that using the preparation of multiple self-crosslinking technology aqueous woodware paint either pencil hardness, still Scratch hardness sells that market product is good than now, while also to sell market product than now good for the wear-resisting property of paint film, in addition fixes seed The amount of lotion changes the collocation of cross-linking monomer A and B and vinylsiloxane, and no matter how cross-linking monomer A and B change, with γ- The lotion of methacryloxypropyl trimethoxy silane collocation synthesis, the hardness of final paint film have excellent all in 3H Different water-fast, resistance to boiled water scald do not whiten, resistance to alcohol does not whiten, wearability is high, resist blocking and that and relatively high gloss and richness, with Solvent type furniture paint performance is suitable.

Claims (8)

1. a kind of multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature characterized by comprising
40~50 parts of deionized water;0.1~1 part of emulsifier A;0.1~1 part of emulsifier B;PH buffer 0.02~0.09 Part;0.3 part of ammonium persulfate;0.3~0.9 part of vinyl unsaturated carboxylic acid;25~35 parts of methacrylate;Acrylate 4~6 Part;4~6 parts of styrene;Modified SiO2With 8~12 parts of dispersion liquid of acrylate monomer;0.3~1.0 part of cross-linking monomer A;Second 0.5~0.9 part of alkenyl siloxane;0.3~1.0 part of cross-linking monomer B;0.04 part of tert-butyl hydroperoxide;Sodium hydrogensulfite 0.04 Part;0.05 part of defoaming agent;0.05 part and 1 part of ammonium hydroxide of preservative;
The modification SiO2Dispersion liquid with acrylate monomer is the acrylic acid using ethyl orthosilicate as silica precursor Ester monomer is decentralized medium, and dilute sulfuric acid is catalyst, and γ-methacryloxypropyl trimethoxy silane is as activity grafting Modifying agent is stirred at room temperature hydrolysis in 24 hours and is made;
The cross-linking monomer A is selected from Diacetone Acrylamide, glycidyl methacrylate, acetoacetate methacrylic acid second One of diol ester;The cross-linking monomer B select two hydrazine of adipic acid, carbon acid dihydrazide, careless acid dihydrazide, in succinic acid hydrazide ii One kind;
The multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature is prepared by following methods;
(1) modified SiO is prepared2With the dispersion liquid of acrylate monomer: weighing emulsifier A and deionized water in beaker, use glass Stick stirring sufficiently dissolution, obtains emulsifier aqueous solution;Then suitable ethyl orthosilicate, γ-methacryloxypropyl are weighed Trimethoxy silane is dissolved in the mix monomer of methyl methacrylate and butyl acrylate, obtains oil mixture;Then exist Under being vigorously stirred of high-shear homogenizer, the oil mixture is added dropwise into above-mentioned emulsifier aqueous solution, and use dilute sulfuric acid PH value is adjusted, high speed dispersion 30min is continued, is transferred in the ground boiling flask with plug therewith, at room temperature magnetic agitation 24 Hour, it reacts it sufficiently, obtains modified SiO2With the dispersion liquid of acrylate monomer;
(2) it prepares nano-composite emulsion: deionized water is added in four round flask, is subsequently placed in stirring in water bath and heats up, when When temperature reaches 75 DEG C, the potassium peroxydisulfate of 2/5 reaction dosage is taken to be dissolved in 5g deionized water, adds round-bottomed flask, subsequent 10min Inside at the uniform velocity 1/5 modification SiO of a dropping step (1) preparation2Enter round-bottomed flask with the dispersion liquid of acrylate monomer, in flask When blue light occurs in reaction solution, remaining 3/5 potassium peroxydisulfate is dissolved in 5g deionized water, then by itself and remaining modification SiO2It is added dropwise in round-bottomed flask with the dispersion liquid of acrylate monomer, is dripped in about 3 hours simultaneously, then keep the temperature 1 hour, Nano-composite emulsion is made;
(3) monomer pre-emulsion is prepared: by deionized water, emulsifier A, emulsifier B and vinyl unsaturated carboxylic acid, methyl Acrylate, acrylate, styrene and crosslinking agent A successively put into monomer pre-emulsification tank, and it is single that high-speed stirred emulsifies formation in 1 hour Body pre-emulsion;
(4) it prepares the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature: adding deionized water, the step of metering into polymeric kettle Suddenly the nano-composite emulsion of (2) preparation, opens stirring, is warming up to 80 DEG C -84 DEG C, after stablizing 15min, while a dropping step (3) The monomer pre-emulsion and ammonium persulfate solution of middle preparation stop being added dropwise when being added drop-wise to residual monomer pre-emulsion 1/5;Add Enter vinylsiloxane monomer stirring 10min to continue to be added dropwise later, controls entire time for adding in 210min-240min, drip Heating degree is controlled at 78 DEG C -82 DEG C;1 hour is kept the temperature under dropping temperature after being added dropwise;60 DEG C -70 is cooled to after heat preservation DEG C, add tert-butyl hydroperoxide aqueous solution, aqueous solution of sodium bisulfite is added dropwise after 10min, temperature is added dropwise in time for adding 30min Subsequent continuation of insurance temperature 30min is added dropwise at 63 DEG C -67 DEG C in degree control, is finally cooled to 40 DEG C hereinafter, adjusting pH to 7- with ammonium hydroxide 9, be added metering crosslinking agent B stirring 30min, then plus defoaming agent, preservative after, with 200-500 mesh filter screen filter, be made room temperature Multiple self-crosslinking nano acrylic ester copolymer emulsion.
2. the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature according to claim 1, which is characterized in that described Vinylsiloxane is selected from vinyltriethoxysilane, vinyltrimethoxysilane, γ-methacryloxypropyl three One of methoxy silane.
3. the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature according to claim 1, which is characterized in that described Vinyl unsaturated carboxylic acid is selected from one of acrylic acid, methacrylic acid, itaconic acid.
4. the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature according to claim 1, which is characterized in that described Methacrylate is selected from one of butyl methacrylate, methyl methacrylate, 2-Propenoic acid, 2-methyl-, octyl ester.
5. the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature according to claim 1, which is characterized in that described Acrylate is selected from one of butyl acrylate, ethyl acrylate, 2-ethyl hexyl acrylate.
6. the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature according to claim 1, which is characterized in that described Emulsifier A is anionic surfactant, is selected from sodium laureth sulfate, sodium laurate, ammonium laurate, alkyl phenol Polyoxyethylene ether ammonium sulfate, dodecyl benzene sulfonic acid, dodecyl benzene sulfonic acid ammonium, lauryl sodium sulfate, dodecyl sulphate Ammonium, alkyl diphenyl ether disodium sulfonate salt, alkyl polyoxyethylene acyl sodium sulfonate, tributyl phenol sodium sulfonate of ethoxylated, allyl One of polyoxyethylene ether derivant ammonium sulfate and allyl polyethenoxy ether ammonium sulfate;The emulsifier B is poly- selected from alkyl Ethylene oxide ether series environment-friendly type nonionic emulsifier, alkyl alcohol ethoxylates series, alkyl phenol polyoxyethylene ether compound, One of fatty alcohol polyoxyethylene ether, alkyl phenol polyoxyethylene ether.
7. preparing the side of the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature of any of claims 1-6 Method, which comprises the steps of:
(1) modified SiO is prepared2With the dispersion liquid of acrylate monomer: weighing emulsifier A and deionized water in beaker, use glass Stick stirring sufficiently dissolution, obtains emulsifier aqueous solution;Then suitable ethyl orthosilicate, γ-methacryloxypropyl are weighed Trimethoxy silane is dissolved in the mix monomer of methyl methacrylate and butyl acrylate, obtains oil mixture;Then exist Under being vigorously stirred of high-shear homogenizer, the oil mixture is added dropwise into above-mentioned emulsifier aqueous solution, and use dilute sulfuric acid PH value is adjusted, high speed dispersion 30min is continued, is transferred in the ground boiling flask with plug therewith, at room temperature magnetic agitation 24 Hour, it reacts it sufficiently, obtains modified SiO2With the dispersion liquid of acrylate monomer;
(2) it prepares nano-composite emulsion: deionized water is added in four round flask, is subsequently placed in stirring in water bath and heats up, when When temperature reaches 75 DEG C, the potassium peroxydisulfate of 2/5 reaction dosage is taken to be dissolved in 5g deionized water, adds round-bottomed flask, subsequent 10min Inside at the uniform velocity 1/5 modification SiO of a dropping step (1) preparation2Enter round-bottomed flask with the dispersion liquid of acrylate monomer, in flask When blue light occurs in reaction solution, remaining 3/5 potassium peroxydisulfate is dissolved in 5g deionized water, then by itself and remaining modification SiO2It is added dropwise in round-bottomed flask with the dispersion liquid of acrylate monomer, is dripped in about 3 hours simultaneously, then keep the temperature 1 hour, Nano-composite emulsion is made;
(3) monomer pre-emulsion is prepared: by deionized water, emulsifier A, emulsifier B and vinyl unsaturated carboxylic acid, methyl Acrylate, acrylate, styrene and crosslinking agent A successively put into monomer pre-emulsification tank, and it is single that high-speed stirred emulsifies formation in 1 hour Body pre-emulsion;
(4) it prepares the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature: adding deionized water, the step of metering into polymeric kettle Suddenly the nano-composite emulsion of (2) preparation, opens stirring, is warming up to 80 DEG C -84 DEG C, after stablizing 15min, while a dropping step (3) The monomer pre-emulsion and ammonium persulfate solution of middle preparation stop being added dropwise when being added drop-wise to residual monomer pre-emulsion 1/5;Add Enter vinylsiloxane monomer stirring 10min to continue to be added dropwise later, controls entire time for adding in 210min-240min, drip Heating degree is controlled at 78 DEG C -82 DEG C;1 hour is kept the temperature under dropping temperature after being added dropwise;60 DEG C -70 is cooled to after heat preservation DEG C, add tert-butyl hydroperoxide aqueous solution, aqueous solution of sodium bisulfite is added dropwise after 10min, temperature is added dropwise in time for adding 30min Subsequent continuation of insurance temperature 30min is added dropwise at 63 DEG C -67 DEG C in degree control, is finally cooled to 40 DEG C hereinafter, adjusting pH to 7- with ammonium hydroxide 9, be added metering crosslinking agent B stirring 30min, then plus defoaming agent, preservative after, with 200-500 mesh filter screen filter, be made room temperature Multiple self-crosslinking nano acrylic ester copolymer emulsion.
8. using the multiple self-crosslinking nano acrylic ester copolymer emulsion of room temperature of any of claims 1-6 as base-material system Standby aqueous woodware paint, which is characterized in that the composition of the aqueous woodware paint includes each component of following parts by weight:
16 parts of deionized water;75 parts of lotion;0.3 part of wetting agent;0.3 part of levelling agent;4 parts of dipropylene;Dipropylene glycol first 4 parts of ether;0.3 part of thickener;0.05 part of defoaming agent;0.05 part of preservative;0.1 part of dispersing agent;2.5 parts of scratching resistant and stearic acid 5 parts of zinc.
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