CN1760224A - Method for preparing inflaming retarding type copolymerization latex of urethane acrylate - Google Patents

Method for preparing inflaming retarding type copolymerization latex of urethane acrylate Download PDF

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Publication number
CN1760224A
CN1760224A CN 200510030114 CN200510030114A CN1760224A CN 1760224 A CN1760224 A CN 1760224A CN 200510030114 CN200510030114 CN 200510030114 CN 200510030114 A CN200510030114 A CN 200510030114A CN 1760224 A CN1760224 A CN 1760224A
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acrylate
flame retardant
inflaming retarding
consumption
double key
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CN100413901C (en
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韩冬
吕侠
朱敏
卢斯亮
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Alligator Coatings Shanghai Co ltd
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SHANGHAI SHENZHEN ENTERPRISE DEVELOPMENT Co Ltd
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Abstract

A process for preparing the flame-retarding polyurethane-acrylate copolymer emulsion includes such steps as preparing the flame-retarding polyurethane seed emulsion containing double bond, core-shell copolymerizing between said seed emulsion and acrylate, and mixing it with the emulsion of meta-dishloroethene-acrylate copolymer.

Description

The preparation method of inflaming retarding type copolymerization latex of urethane acrylate
Technical field
The present invention relates to chemical technology field, be specifically related to a kind of preparation method of inflaming retarding type copolymerization latex of urethane acrylate.
Background technology
Along with the enhancing, particularly various countries' environmental regulation of people's environmental protection, energy consciousness strictness restriction, promoted that water-borne coatings is the development of the low-contamination type coating of representative to volatile organic matter in the coating system (VOC) content.Aqueous polyurethane (PU) emulsion and polyacrylic ester (PA) emulsion have been widely used as the base-material of coating, printing ink, tackiness agent, but its performance is difficult to match in excellence or beauty with corresponding solvent type resin usually.Yet the performance of PU and PA two class emulsions has very strong complementarity, has excellent abrasive, solvent-resisting, scratch resistance as the PU emulsion film, but aspects such as stability, solid content, gloss, cost are not fully up to expectations; The advantage of PA emulsion film is big, good with outward appearance and the relative low cost of weathering resistance of hardness, but wear resistance, chemical-resistant are relatively poor.The effective ways that improve emulsion property are with two kinds of emulsion chemistry copolymerization, and products therefrom is polyurethane/acrylate (PUA) copolymer emulsion, and its film performance combines both advantages, more and more come into one's own at present and are used widely.Along with the expansion of PUA material application surface, each industrial sector, especially furniture industry, paper industry and building industry, more and more higher to the requirement of flame retardant properties, and the preparation of inflaming retarding type copolymerization latex of urethane acrylate rarely has report simultaneously.
Find through literature search prior art, Chinese patent application number is 03113854.3 patent, this patent adopts seeded emulsion polymerization technology, the acrylate urethane copolymer emulsion that has prepared the cross linking of epoxy resin modification, its film have excellent in water resistance, solvent resistance, high rigidity and good surface appearance, but relevant fire-retardant problem is proposed.Also find in the retrieval, Chinese patent application number is 200410012458.5 patent, this patent adopts the LIPN polymerization, prepared polyurethane/polyacrylate latex interpenetrating network polymer emulsion, can be used for hide finishes, wood lacquer, automobile damping material etc., but it does not satisfy the requirement of materials such as woodenware to flame retardant properties yet.In further retrieving, find as yet and the identical or similar bibliographical information of theme of the present invention " inflaming retarding type copolymerization latex of urethane acrylate and preparation method thereof ".
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of preparation method who prepares inflaming retarding type copolymerization latex of urethane acrylate is provided.Make it pass through " particle design ",, give the PUA aqueous dispersion interior flame retardant resistance of filming, satisfying the raising to fire-retardant requirement such as furniture industry, paper industry and building industry, and enlarge the range of application of PUA flame-retardant polyurethane and acrylic ester copolymer.
The present invention is achieved by the following technical solutions, and the present invention adopts the molecular designing means, makes double bond containing flame-retardant polyurethane seed emulsion; Utilize the particle design means again, flame retardant polyurethane seed emulsion and acrylate are carried out core-shell copolymerized, promptly obtain inflaming retarding type copolymerization latex of urethane acrylate with vinylidene chloride/acrylate copolymer emulsion thorough mixing then.Method steps is as follows:
(1) earlier vulcabond, flame retardant resistance polyvalent alcohol, non-flame retardant resistance polyvalent alcohol and the compound bearing active hydrogen that has that can form hydrophilic radical are carried out the prepolymer hybrid reaction earlier, obtain flame retardant polyurethane prepolymer I;
(2) with prepolymer I and the monomer reaction that contains activity double key to-NCO content to prescribed value, add neutralizing agent and all acrylate monomer then, in and hydrophilic radical and reduce prepolymer viscosity, make the flame retardant polyurethane prepolymer II of ionic band activity double key and the mixture of acrylate monomer; (3) prepolymer II is distributed in the deionized water, adds small molecule chain extender simultaneously and carry out chain extension, make acrylate monomer swollen flame-retardant polyurethane water dispersion;
(4) with above-mentioned aqueous dispersion, heat temperature raising to 50~80 ℃ are incubated 0.5~1.5 hour; In 1~3.5 hour, initiator and remaining acrylate monomer are dropwised then, continued insulation reaction again 1~3 hour, cooling is filtered, and obtains inflaming retarding type copolymerization latex of urethane acrylate then with behind a certain amount of vinylidene chloride (VdC)/acrylate (Acrylate) copolymer emulsion thorough mixing;
Wherein the consumption of each raw material is as follows:
Described vulcabond, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 14%~55%;
Described flame retardant resistance polyvalent alcohol, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 6.5%~76%;
Described non-flame retardant resistance polyvalent alcohol, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 0%~54%;
The described compound bearing active hydrogen that has that forms hydrophilic radical, consumption account for according to its contained carboxyl quality ionic band activity double key flame retardant polyurethane prepolymer gross weight 1.4%~2.7%;
Described neutralizing agent, consumption be in the flame retardant polyurethane prepolymer of ionic band activity double key the carboxyl molar weight 70%~120%;
The described monomer that contains activity double key, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 2.5%~15%;
Described small molecule chain extender, consumption be ionic band activity double key the polyurethane prepolymer total mass 0%~12.5%;
Described vinylidene chloride/acrylate copolymer emulsion, its consumption is determined by 0%~100% of its solid part quality polyurethane prepolymer total mass that is ionic band activity double key;
Described acrylate monomer, consumption be ionic band activity double key the polyurethane prepolymer total mass 30%~150%;
Described initiator, consumption are 0.5%~1.2% of acrylate monomer total mass.
Described vulcabond is selected from tolylene diisocyanate (TDI), diphenylmethanediisocyanate (MDI), naphthalene-1,5-vulcabond (NDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), 2,6-vulcabond methyl caproate (LDI), 4,4 '-methylene radical-dicyclohexyl vulcabond (H 12MDI), xylylene diisocyanate (XDI), 1,12-dodecyl vulcabond (C 12DDI) etc. a kind of in common aromatic series and the aliphatic diisocyanate.
That described flame retardant resistance polyvalent alcohol is selected from is phosphorous, the polyvalent alcohol with anti-flaming function of one or more elements in the antimony, halogen, as one or more the mixture in phosphoric acid ester polyether glycol, phosphorus antimony chlorine ternary phosphoric acid ester polyether glycol, halogenated polyether polyvalent alcohol, dibromoneopentyl glycol, the tetrabromo-bisphenol.Wherein:
Described phosphoric acid ester polyether glycol is for being phosphide with in phosphorus trichloride, phosphoric acid or five phosphorus oxide one or more, in glycerine, TriMethylolPropane(TMP), butyleneglycol, propylene glycol, sorbyl alcohol, the tetramethylolmethane one or more are polyol, ethylene oxide, propylene oxide, epoxy chloropropane, butylene oxide ring, 1,1,1-three chloro-3, one or more in the 4-butylene oxide ring are the phosphor-containing flame-proof dibasic alcohol of feedstock production gained for epoxide;
Described phosphorus antimony chlorine ternary phosphoric acid ester polyether glycol is for being phosphide with in phosphorus trichloride, phosphoric acid or five phosphorus oxide one or more, in glycerine, TriMethylolPropane(TMP), propylene glycol, sorbyl alcohol, the tetramethylolmethane one or more are polyol, ethylene oxide, propylene oxide, epoxy chloropropane, butylene oxide ring, 1-three chloro-3, in the 4-butylene oxide ring one or more are epoxide, and butter of antimony is phosphorous, the antimony of feedstock production gained, the dibasic alcohol of three kinds of ignition-proof elements of chlorine;
Described halogenated polyether polyvalent alcohol is 4,4,4-three chloro-1, and 2-butylene oxide ring or 4,4,4-three bromo-1, the 2-butylene oxide ring is a raw material, lewis' acid is a catalyzer, the various halogenated polyether dibasic alcohol that reaction makes.
Described non-flame retardant resistance polyvalent alcohol is selected from polyether Glycols commonly used, polyester diol, polycarbonate diol, polybutadiene diol, polybutene glycol, acrylate polyvalent alcohol, polycaprolactone glycol, the mixture of one or more in the PTMG.
The described compound bearing active hydrogen that has that forms hydrophilic radical is selected from dibasic alcohol such as dimethylol propionic acid, tartrate that contains carboxyl structure and one or more the mixture in the dibasic alcohol that contains the sulfonic acid structure.
Described neutralizing agent be selected from the energy and mineral alkalis such as tertiary amines organic bases, sodium hydroxide, ammoniacal liquor such as the compound of carboxylic acid and sulfonic acid such as triethylamine in one or more mixture.
The described monomer that contains activity double key be selected from contain " C=C " double bond structure band can with the monomer of-NCO reactive activity hydrogen, as one or more mixture of Hydroxyethyl acrylate, hydroxyethyl methylacrylate, Propylene glycol monoacrylate, N hydroxymethyl acrylamide.
Described small molecule chain extender is selected from micromolecular diamine, polyamine, as quadrol, hexanediamine, diethylenetriamine, hydrazine hydrate etc.
Described vinylidene chloride/acrylate copolymer emulsion is a VdC content at vinylidene chloride/acrylate copolymer emulsion of 30%~70%.
Described acrylate monomer is selected from alkyl acrylate, alkyl methacrylate or vinyl carboxylic acid, as methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, isopropyl acrylate, isopropyl methacrylate, butyl acrylate, the mixture of one or more in butyl methacrylate, hexanediyl ester, decyl acrylate, lauryl methacrylate(LMA), hydroxyethyl methylacrylate, N hydroxymethyl acrylamide, vinyl cyanide, vinylbenzene, the acrylamide.
Described initiator is selected from water-soluble thermal initiator, oil soluble thermal initiators, redox initiator, a kind of as in Potassium Persulphate, ammonium persulphate, Diisopropyl azodicarboxylate, benzoyl peroxide, t-butyl hydroperoxide/xitix, the Potassium Persulphate/sodium bisulfite.
The preparation condition and the equipment of the preparation condition of inflaming retarding type copolymerization latex of urethane acrylate of the present invention and equipment and existing copolymerization latex of urethane acrylate are basic identical.
The inflaming retarding type copolymerization latex of urethane acrylate of the present invention's preparation is compared with existing copolymerization latex of urethane acrylate has following advantage: (1) the present invention has designed the chemical structure that has anti-flaming function on polyurethane backbone, and makes it to have prepared the good PUA copolymer emulsion that has flame retarding construction of consistency with acrylic ester copolymer; (2) chemical structure of band anti-flaming function gives the inflaming retarding type copolymerization latex of urethane acrylate goods certain interior flame retardant effect, has avoided adding fire retardant to the copolymerization latex of urethane acrylate Effect on Performance.
Embodiment
Below by embodiment embodiment of the present invention are described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
Inflaming retarding type copolymerization latex of urethane acrylate prescription one:
Raw material Quality (g)
Toluene di-isocyanate(TDI) phosphorus antimony chlorine ternary phosphoric acid ester polyether Glycols (hydroxyl value 50mgKOH/g) dihydromethyl propionic acid triethylamine hydroxyethyl methacrylate methyl methacrylate butyl acrylate EMA styrene initator 17400g 95724g 5452g 3493g 4366g 76573g 9524g 25140g 15198g 632g
In the reactor that stirring arm, thermometer and condenser are housed, add tolylene diisocyanate, hydroxyl value is the phosphorus antimony chlorine ternary phosphoric acid ester polyether Glycols of 50mgKOH/g, dimethylol propionic acid, be warming up to 60 ℃, insulation reaction 0.5 hour is warming up to 75 ℃ of reactions to-NCO content again and reaches prescribed value.The hydroxyethyl methylacrylate that adds metering, 75 ℃ of following insulation reaction 2 hours are cooled to 30 ℃ then, obtain being with activity double key flame retardant polyurethane prepolymer.Add triethylamine and all acrylate monomer, stir the miscellany that obtained end capped flame retardant polyurethane performed polymer of anionic activity double key and acrylate monomer in 0.5 hour.Above-mentioned miscellany is added deionized water carry out emulsification in emulsify at a high speed equipment, make acrylate monomer swollen flame-retardant polyurethane water dispersion.With above-mentioned aqueous dispersion heat temperature raising to 50 ℃, be incubated 1 hour; Be warming up to 80 ℃ and in 1 hour initiator is dropwised then, continued insulation reaction again 3 hours, discharging is filtered in cooling, obtains inflaming retarding type copolymerization latex of urethane acrylate.In the prescription of the present invention, NCO/OH (mol ratio) is 1.2, and-COOH mass content is 1.4%, and neutralization ratio is 85%.The flame-retardant polyurethane water dispersion of the present invention preparation be translucent, do not have mechanical impurity, no condensation product milk sap.This emulsion has good stability to hydrolysis and storage stability, and water-resistance property of coating, solvent resistance are good.The flame-retardant polyurethane water dispersion of the present invention that takes a morsel preparation is measured according to GB GB12441-1998 " finishing fire retardant paint general technical specifications ", its anti-combustion time 〉=20min, ratio≤35 are relayed in the fire combustion, reach secondary domestic enterprise production fire resistance.
Embodiment 2
Inflaming retarding type copolymerization latex of urethane acrylate prescription two:
Raw material Quality (g)
IPDI phosphoric acid ester polyether Glycols (hydroxyl value 200mgKOH/g) dibromoneopentyl glycol tartaric acid hydroxypropyl acrylate NaOH hexamethylene diamine methyl methacrylate initator vinylidene chloride/acrylate copolymer emulsion (VdC content be 50%, solid content 45%) 22200g 6626g 2907g 1682g 6007g 628g 5053g 12015g 120g 44500g
In the reactor that stirring arm, thermometer and condenser are housed, add tolylene diisocyanate, hydroxyl value is the phosphoric acid ester polyether Glycols of 200mgKOH/g, dibromoneopentyl glycol, dimethylol propionic acid, be warming up to 60 ℃, insulation reaction 1 hour is warming up to 85 ℃ of reactions to-NCO content again and reaches prescribed value.The Propylene glycol monoacrylate that adds metering, 80 ℃ of following insulation reaction 1~2 hour are cooled to 45 ℃ then, obtain being with activity double key flame retardant polyurethane prepolymer.Add NaOH and whole methyl methacrylate, stir the miscellany that obtained end capped flame retardant polyurethane performed polymer of anionic activity double key and methyl methacrylate monomer in 1 hour.Said mixture is added deionized water carry out emulsification in emulsify at a high speed equipment, make methyl methacrylate monomer swollen flame-retardant polyurethane water dispersion.With above-mentioned aqueous dispersion heat temperature raising to 60 ℃, be incubated 1 hour; In 3.5 hours initiator is dropwised then, continued insulation reaction again 2 hours, discharging is filtered in cooling, and it is even to add vinylidene chloride/acrylate copolymer emulsion thorough mixing then, obtains inflaming retarding type copolymerization latex of urethane acrylate.In the prescription of the present invention, NCO/OH (mol ratio) is 3.0, and-COOH mass content is 2.5%, and neutralization ratio is 70%.The flame-retardant polyurethane water dispersion of the present invention preparation for milky white, do not have mechanical impurity, no condensation product milk sap.This emulsion has good stability to hydrolysis and storage stability, smears water tolerance, solvent resistance is good.The flame-retardant polyurethane water dispersion of the present invention that takes a morsel preparation is measured according to GB GB12441-1998 " finishing fire retardant paint general technical specifications ", its anti-combustion time 〉=10min, ratio≤55 are relayed in the fire combustion, reach three grades of domestic enterprise's production fire resistances.
Embodiment 3
Inflaming retarding type copolymerization latex of urethane acrylate prescription three:
Raw material Quality
Hexamethylene diisocyanate phosphoric acid ester polyether Glycols (hydroxyl value 200mgKOH/g) PTMG (mean molecule quantity 1000) dihydromethyl propionic acid triethanolamine N hydroxymethyl acrylamide ethylenediamine styrene methyl methacrylate initator vinylidene chloride/acrylate copolymer emulsion (VdC content be 70%, solid content 45%) 16800g 4058g 33272g 3502g 2639g 1545g 2541g 13570g 60609g 890g 137368g
Stirring arm is being housed, in the reactor of thermometer and condenser, add hexamethylene diisocyanate, the phosphoric acid ester polyether Glycols, PTMG (molecular-weight average 1000), dimethylol propionic acid, be warming up to 60 ℃, insulation reaction 1.5 hours, be warming up to 90 ℃ of reactions to-NCO content again and reach prescribed value, the N hydroxymethyl acrylamide that adds metering, 85 ℃ of following insulation reaction 2 hours are cooled to 35 ℃ then, add trolamine and whole methyl methacrylate and vinylbenzene, stir the miscellany that obtains end capped flame retardant polyurethane performed polymer of anionic activity double key and acrylate monomer after 1 hour.Said mixture is added deionized water carry out emulsification in emulsify at a high speed equipment, make acrylate monomer swollen flame-retardant polyurethane water dispersion.With above-mentioned aqueous dispersion heat temperature raising to 50 ℃, be incubated 1.5 hours; Be warming up to 80 ℃ then and in 2.5 hours initiator dropwised, continued insulation reaction again 2 hours, cooling is filtered, and it is even to add vinylidene chloride/acrylate copolymer emulsion thorough mixing then, obtains inflaming retarding type copolymerization latex of urethane acrylate.In the prescription of the present invention, NCO/OH (mol ratio) is 2.0, and-COOH mass content is 1.9%, and neutralization ratio is 100%.The flame-retardant polyurethane water dispersion of the present invention preparation is oyster white, do not have mechanical impurity, no condensation product milk sap.The flame-retardant polyurethane water dispersion of the present invention that takes a morsel preparation is measured according to GB GB12441-1998 " finishing fire retardant paint general technical specifications ", its anti-combustion time 〉=10min, ratio≤70 are relayed in the fire combustion, reach three grades of domestic enterprise's production fire resistances.
Embodiment 4
Inflaming retarding type copolymerization latex of urethane acrylate prescription four:
Raw material Quality
4,4 '-methyl diphenylene diisocyanate (MDI) phosphoric acid ester polyether Glycols (hydroxyl value 150mgKOH/g) chloro polyether Glycols (hydroxyl value 100mgKOH/g) dihydromethyl propionic acid hydroxy-ethyl acrylate hydroxyethyl methacrylate triethylamine hexamethylene diamine methyl methacrylate butyl acrylate styrene 25000g 6904g 10355g 4169g 2620g 1076g 2671g 3127g 55350g 13006g 10837g
Initiator vinylidene chloride/acrylate copolymer emulsion (VdC content be 30%, solid content 45%) 792g 35196g
Stirring arm is being housed, in the reactor of thermometer and condenser, add 4,4 '-diphenylmethanediisocyanate, the phosphoric acid ester polyether Glycols, the chloro polyether Glycols, dimethylol propionic acid, be warming up to 60 ℃, insulation reaction 1 hour is warming up to 85 ℃ of reactions to-NCO content again and reaches prescribed value, add Hydroxyethyl acrylate and hydroxyethyl methylacrylate, 90 ℃ of following insulation reaction 2 hours are cooled to 55 ℃ then, are cooled to 40 ℃, add trolamine and all acrylate monomer and vinylbenzene, stir the miscellany that obtains end capped flame retardant polyurethane performed polymer of anionic activity double key and acrylate monomer after 1 hour.Said mixture is added deionized water carry out emulsification in emulsify at a high speed equipment, and added the hexanediamine stirring reaction 30 minutes, make acrylate monomer swollen flame-retardant polyurethane water dispersion.With above-mentioned aqueous dispersion heat temperature raising to 65 ℃, be incubated 1 hour; In 2 hours initiator is dropwised then, continued insulation reaction again 3 hours, cooling is filtered, and it is even to add vinylidene chloride/acrylate copolymer emulsion thorough mixing then, obtains inflaming retarding type copolymerization latex of urethane acrylate.In the prescription of the present invention, NCO/OH (mol ratio) is 1.7, and-COOH mass content is 2.7%, and neutralization ratio is 85%.The flame-retardant polyurethane water dispersion of the present invention preparation for milky white, do not have mechanical impurity, no condensation product milk sap.The flame-retardant polyurethane water dispersion of the present invention that takes a morsel preparation is measured according to GB GB12441-1998 " finishing fire retardant paint general technical specifications ", its anti-combustion time 〉=10min, ratio≤60 are relayed in the fire combustion, reach three grades of domestic enterprise's production fire resistances.
Embodiment 5
Flame-retardant polyurethane water dispersion prescription five:
Raw material Quality
4,4 '-methylene radical-dicyclohexyl vulcabond (H 12MDI) phosphorus antimony chlorine ternary phosphoric acid ester polyether Glycols (hydroxyl value 112mgKOH/g) polyoxypropyleneglycol (mean molecule quantity 2000) PTMG (mean molecule quantity 1000) dihydromethyl propionic acid triethylamine hydroxypropyl acrylate 26200g 14917g 9945g 4972g 4113g 2635g 3304g
Hexamethylene diamine methyl methacrylate butyl methacrylate initator vinylidene chloride/acrylate copolymer emulsion (VdC content be 50%, solid content 45%) 3681g 54312g 11774g 661g 88114g
Stirring arm is being housed, in the reactor of thermometer and condenser, add 4,4 '-methylene radical-dicyclohexyl vulcabond, phosphorus antimony chlorine ternary phosphoric acid ester polyether Glycols, the polyoxytrimethylene dibasic alcohol, PTMG, dimethylol propionic acid is warming up to 60 ℃, insulation reaction 1.5 hours, be warming up to 90 ℃ of reactions to-NCO content again and reach prescribed value, the Propylene glycol monoacrylate that adds metering, 90 ℃ of following insulation reaction 3 hours are cooled to 40 ℃, add triethylamine and all acrylate monomer, stir the miscellany that obtains end capped flame retardant polyurethane performed polymer of anionic activity double key and acrylate monomer after 1 hour.Said mixture is added deionized water carry out emulsification in emulsify at a high speed equipment, and added the hexanediamine stirring reaction 30 minutes, make acrylate monomer swollen flame-retardant polyurethane water dispersion.With above-mentioned aqueous dispersion heat temperature raising to 65 ℃, be incubated 1 hour; In 2 hours initiator is dropwised then, continued insulation reaction again 3 hours, cooling is filtered, and it is even to add vinylidene chloride/acrylate copolymer emulsion thorough mixing then, obtains inflaming retarding type copolymerization latex of urethane acrylate.Above-mentioned performed polymer is added deionized water carry out emulsification in emulsify at a high speed equipment, promptly get the polyurethane aqueous dispersions that anionic has anti-flaming function.In the prescription of the present invention, NCO/OH (mol ratio) is 1.8, and-COOH mass content is 2.2%, and neutralization ratio is 85%.The flame-retardant polyurethane water dispersion of the present invention preparation for milky white, do not have mechanical impurity, no condensation product milk sap.The flame-retardant polyurethane water dispersion of the present invention that takes a morsel preparation is measured according to GB GB12441-1998 " finishing fire retardant paint general technical specifications ", its anti-combustion time 〉=10min, ratio≤55 are relayed in the fire combustion, reach three grades of domestic enterprise's production fire resistances.

Claims (10)

1, a kind of preparation method of inflaming retarding type copolymerization latex of urethane acrylate is characterized in that, may further comprise the steps:
(1) earlier vulcabond, flame retardant resistance polyvalent alcohol, non-flame retardant resistance polyvalent alcohol and the compound bearing active hydrogen that has that can form hydrophilic radical are carried out the prepolymer hybrid reaction earlier, obtain flame retardant polyurethane prepolymer I;
(2) with prepolymer I and the monomer reaction that contains activity double key to-NCO content to prescribed value, add neutralizing agent and part or all of acrylate monomer then, in and hydrophilic radical and reduce prepolymer viscosity, make the flame retardant polyurethane prepolymer II of ionic band activity double key and the mixture of acrylate monomer;
(3) prepolymer II is distributed in the deionized water, adds small molecule chain extender simultaneously and carry out chain extension, make acrylate monomer swollen flame-retardant polyurethane water dispersion;
(4) with above-mentioned aqueous dispersion heat temperature raising to 50~80 ℃, be incubated 0.5~1.5 hour; In 1~3.5 hour, initiator, remaining acrylate monomer are dropwised then, continued insulation reaction again 1~3 hour, cooling is filtered, and obtains inflaming retarding type copolymerization latex of urethane acrylate then with behind vinylidene chloride/acrylate copolymer emulsion thorough mixing;
Wherein the consumption of each raw material is as follows:
Described vulcabond, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 14%~55%;
Described flame retardant resistance polyvalent alcohol, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 6.5%~76%;
Described non-flame retardant resistance polyvalent alcohol, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 0%~54%;
The described compound bearing active hydrogen that has that forms hydrophilic radical, consumption account for according to its contained carboxyl quality ionic band activity double key flame retardant polyurethane prepolymer gross weight 1.4%~2.7%;
Described neutralizing agent, consumption be in the flame retardant polyurethane prepolymer of ionic band activity double key the carboxyl molar weight 70%~120%;
The described monomer that contains activity double key, consumption be ionic band activity double key flame retardant polyurethane prepolymer gross weight 2.5%~15%;
Described small molecule chain extender, consumption be ionic band activity double key the polyurethane prepolymer total mass 0%~12.5%;
Described vinylidene chloride/acrylate copolymer emulsion, its consumption are that 0%~100% of ionic polyurethanes prepolymer total mass is determined by its solid part quality;
Described acrylate monomer, consumption be ionic band activity double key the polyurethane prepolymer total mass 30%~150%;
Described initiator, consumption are 0.5%~1.2% of acrylate monomer total mass.
2, the preparation method of inflaming retarding type copolymerization latex of urethane acrylate according to claim 1, it is characterized in that, in the step (1), described vulcabond is selected from tolylene diisocyanate TDI, diphenylmethanediisocyanate MDI, naphthalene-1,5-vulcabond NDI, hexamethylene diisocyanate HDI, isophorone diisocyanate IPDI, 2,6-vulcabond methyl caproate LDI, 4,4 '-methylene radical-dicyclohexyl vulcabond H 12MDI, xylylene diisocyanate XDI, 1,12-dodecyl vulcabond C 12A kind of among the DDI.
3, according to the preparation method of claim 1 or 2 described inflaming retarding type copolymerization latex of urethane acrylate, it is characterized in that, in the step (1), described flame retardant resistance polyvalent alcohol is selected from one or more the mixture in phosphoric acid ester polyether glycol, phosphorus antimony chlorine ternary phosphoric acid ester polyether glycol, halogenated polyether polyvalent alcohol, dibromoneopentyl glycol, the tetrabromo-bisphenol.
4, according to the preparation method of claim 1 or 2 described inflaming retarding type copolymerization latex of urethane acrylate, it is characterized in that, in the step (1), described non-flame retardant resistance polyvalent alcohol is selected from polyether Glycols commonly used, polyester diol, polycarbonate diol, polybutadiene diol, polybutene glycol, acrylate polyvalent alcohol, polycaprolactone glycol, the mixture of one or more in the PTMG.
5, according to the preparation method of claim 1 or 2 described inflaming retarding type copolymerization latex of urethane acrylate, it is characterized in that, in the step (1), the described compound bearing active hydrogen that has that forms hydrophilic radical is selected from the dibasic alcohol that contains carboxyl structure, is one or more the mixture in dimethylol propionic acid, tartrate and the dibasic alcohol that contains the sulfonic acid structure.
6, the preparation method of inflaming retarding type copolymerization latex of urethane acrylate according to claim 1, it is characterized in that, in the step (2), described neutralizing agent is selected from the energy and the basic cpd of carboxylic acid and sulfonic acid, is one or more the mixture in triethylamine, tri-n-butylamine, sodium hydroxide, the ammoniacal liquor.
7, according to the preparation method of claim 1 or 6 described inflaming retarding type copolymerization latex of urethane acrylate, it is characterized in that, in the step (2), the described monomer that contains activity double key be selected from contain " C==C " double bond structure band can with the monomer of-NCO reactive activity hydrogen, be one or more mixture of Hydroxyethyl acrylate, hydroxyethyl methylacrylate, Propylene glycol monoacrylate, N hydroxymethyl acrylamide.
8, the preparation method of inflaming retarding type copolymerization latex of urethane acrylate according to claim 1 is characterized in that, in the step (3), described small molecule chain extender is selected from quadrol, hexanediamine, diethylenetriamine, hydrazine hydrate.
9, the preparation method of inflaming retarding type copolymerization latex of urethane acrylate according to claim 1, it is characterized in that, in the step (4), described initiator is selected from a kind of in Potassium Persulphate, ammonium persulphate, Diisopropyl azodicarboxylate, benzoyl peroxide, t-butyl hydroperoxide/xitix, the Potassium Persulphate/sodium bisulfite; Described vinylidene chloride/acrylate copolymer emulsion is a vinylidene chloride content at vinylidene chloride/acrylate copolymer emulsion of 30%~70%.
10, the preparation method of inflaming retarding type copolymerization latex of urethane acrylate according to claim 1, it is characterized in that, described acrylate monomer is selected from methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, isopropyl acrylate, isopropyl methacrylate, butyl acrylate, the mixture of one or more in butyl methacrylate, hexanediyl ester, decyl acrylate, lauryl methacrylate(LMA), hydroxyethyl methylacrylate, N hydroxymethyl acrylamide, vinyl cyanide, vinylbenzene, the acrylamide.
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