CN110746570A - Preparation method of multi-silicon modified waterborne light-cured resin and gloss oil application thereof - Google Patents
Preparation method of multi-silicon modified waterborne light-cured resin and gloss oil application thereof Download PDFInfo
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
Abstract
The invention discloses a preparation method of multiple silicon modified waterborne light-cured resin and a gloss oil application, comprising the following steps: s1, preparing a polyurethane intermediate with a main chain soft end containing silicon and hydrophilic groups; s2, grafting acrylic ester containing active double bonds on the intermediate prepared in the S1; s3, grafting an end-capped silicon monomer on the intermediate prepared in the S2 to synthesize a prepolymer; s4, neutralizing the prepolymer prepared in the S3, and then sequentially dispersing in water and extending chain in water to prepare a water dispersion; and S5, desolventizing the aqueous dispersion prepared in the step S4 to prepare the aqueous light-cured resin. The invention not only greatly improves the physicochemical properties of the resin, such as heat resistance, anti-fouling performance, wear resistance, adhesive force, boiling resistance, solvent resistance and the like, but also improves the Tg point and the refractive index, enhances the compatibility, greatly improves the gloss, achieves and even exceeds the quality of an oily product, has good mechanical stability and storage stability of the final product, and is suitable for industrial production.
Description
Technical Field
The invention belongs to the technical field of multi-silicon structure modified polyurethane acrylic acid water-based photocuring dispersion resin, and particularly relates to multi-silicon modified water-based photocuring resin, a preparation method and application thereof, which are suitable for industries such as industrial coating, printing ink and functional material.
Background
The technology of the water-based light-cured product is rapidly developed in the last two decades in the European and American days, the product is rapidly increased by 3-5% every year, the application field of the product is deepened continuously, and the product relates to various industries such as aerospace, aviation, war industry, civil use and the like. The oil-based skin paint has the advantages of energy conservation, environmental protection, highest production efficiency, convenience for industrial production, best quality and capability of completely achieving the performance of the oil-based skin paint. At present, the domestic market has few water-based photocuring products, mainly comprising Japanese three-well chemical wood paint, Japanese clear water electrophoretic paint, silk-screen printing ink produced by Denmark and the like; the wood lacquer product is mainly used in China, and related resin manufacturers only have two families. The aqueous photocuring products applied in other fields at home are few, and the products related to foreign countries are mainly applied to functional coatings (antifogging coatings, self-cleaning sterilization coatings, stainless steel coil coatings, automobile refinishing coatings, plastic coatings, glass coatings, stone coatings and the like), printing inks (silk screen printing, gravure printing and offset printing), functional materials (high temperature resistance, insulation, resistance welding, strippability, alkaline corrosion, development and the like); the reasons for the lack of related production enterprises in this period are mainly several: 1. the waterborne light-cured product has less varieties and has the performance characteristics of low gloss (matte), poor physical and chemical properties (poor adhesive force, low hardness, poor heat resistance and stain resistance, and poor boiling and solvent resistance); 2. the product has short development time in China and laggard application technology. 3. Most of the raw materials of the product depend on import and have high cost. There are also many domestic patents and research papers about organosilicon modified polyurethane acrylic acid, and the patents and research papers mainly include the following types: (1) the organic silicon modified acrylate secondary water-based dispersion is used as industrial paint resin matched with amino resin and polyurethane water-based curing agent; (2) organic silicon modified polyurethane acrylic acid esterification light-cured resin paint; (3) modifying waterborne polyurethane by using an amino-silicon coupling agent; (4) organic silicon modified acrylate aqueous polyurethane hybrid emulsion; (5) nano silicon dioxide modified polyurethane acrylate waterborne light-cured resin coating; (6) organic silicon modified polyurethane acrylic acid dispersoid photocuring aqueous dispersoid resin and the like; combining the above types of products, the closest type to the present invention is (5), but the performance of (5) is represented by lusterless or semi-gloss, hardness is lower than H, adhesion force is poor (metal, glass, plastic, etc.), boiling water boiling resistance is not resisted, and anti-fouling and anti-wear properties are poor. Meanwhile, the emulsion has poor mechanical stability and storage stability, and is not beneficial to industrial production.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the multiple silicon structure modified polyurethane acrylic acid water-based light-cured resin which has excellent physical and chemical properties, good mechanical stability and storage stability and is convenient for industrial production and application, and the preparation method thereof, and provides the preparation method for preparing the water-based light-cured gloss oil by using the resin.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of multiple silicon modified water-based light-cured resin comprises the following steps:
s1, preparing a polyurethane intermediate with a main chain soft end containing silicon and hydrophilic groups;
s2, grafting acrylic ester containing active double bonds on the intermediate prepared in the S1;
s3, grafting an end-capped silicon monomer on the intermediate prepared in the S2 to synthesize a prepolymer;
s4, neutralizing the prepolymer prepared in the S3, and then sequentially dispersing in water and extending chain in water to prepare a water dispersion;
and S5, desolventizing the aqueous dispersion prepared in the step S4 to prepare the aqueous light-cured resin.
Specifically, step S1, adding diisocyanate, a solvent, 1/3-1/2 catalysts and an antioxidant into a reaction kettle provided with a condenser and a water separator, introducing nitrogen, heating to 80-83 ℃, respectively adding polyol, hydrophilic monomers and hydroxyl silicon, reacting for 4-6 hours, and cooling to 65-70 ℃;
wherein the dosage of the diisocyanate accounts for 30-45% of the solid content of the prepolymer, and the diisocyanate is selected from one or two of HDl, lPDl, XDl and H12 MDl;
the using amount of the polyhydric alcohol accounts for 30-35% of the solid content of the prepolymer, and three or four of caprolactone dihydric alcohol, dimer acid dihydric alcohol, carbonate dihydric alcohol, tetrahydrofuran dihydric alcohol, 1,4 butanediol, 1,6 hexanediol, trimethylolpropane, caprolactone trihydric alcohol and tetrahydrofuran trihydric alcohol are selected;
the dosage of the hydroxyl silicon accounts for 1-5% of the solid content of the prepolymer, and the hydroxyl silicon is selected from one or two of silicon dihydric alcohol and hydroxyphenyl silicon resin;
the amount of the hydrophilic monomer accounts for 4-7% of the solid content of the prepolymer, and the hydrophilic monomer is selected from one or two of nonionic modified polyester dihydric alcohol, hydroxy propionic acid, hydroxy butyric acid, methyl diethanolamine and polyester dihydric alcohol sulfonate;
the dosage of the solvent accounts for 30-50% of the solid content of the prepolymer, and the solvent is selected from two or three of methyl pyrrolidone, diethyl malonate, acetone and butanone.
Specifically, step S2, sequentially adding acrylate containing active double bonds, the rest catalyst and polymerization inhibitor into a reaction kettle, and reacting for 2-4 hours at 60-70 ℃;
wherein the dosage of the acrylate containing the active double bonds accounts for 15-25% of the solid content of the prepolymer, and the acrylate is one or two selected from hydroxyethyl methacrylate, ethylene glycol acrylate and pentaerythritol triacrylate;
the catalyst is selected from one of organic bismuth, dibutyltin dilaurate and cobalt naphthenate;
the polymerization inhibitor is selected from one of phenol, hydroxy ether phenol and tert-butyl phenol.
Specifically, step S3, cooling the materials in the reaction kettle to 35-45 ℃, adding an end-capping silicon monomer, and reacting for 30-50 min to obtain a prepolymer;
the amount of the end-capping silicon monomer accounts for 1-3% of the solid content of the prepolymer, and is selected from one of the following silicon coupling agents KH550, A1100, 1110, 1120, KBM602 and 603.
Specifically, step S4, adding a neutralizing agent into a reaction kettle, adjusting the pH to 6-7 under the condition that the temperature of the reaction kettle is lower than 25 ℃, uniformly stirring for 20-30 min, adding deionized water at the temperature of lower than 25 ℃, stirring, then adding a chain extender dissolved in water in a trickle manner, and extending the chain for 30-60 min at the temperature of 25 ℃ to obtain an aqueous dispersion;
the content of the neutralizing agent accounts for 3-5% of the solid content of the prepolymer, and the neutralizing agent is selected from one of formic acid, acetic acid, dimethylethanolamine, methyldiethanolamine and triethylamine;
the using amount of the chain extender accounts for 0-4% of the solid content of the prepolymer, and the chain extender is selected from one of ethylenediamine, adipic acid dihydrazide and isophorone diamine.
Specifically, step S5, transferring the aqueous dispersion into a desolventizing kettle provided with a condenser and a collecting tank, removing the solvent for 4-6 hours at 50-60 ℃ in vacuum until the aqueous dispersion is odorless in sampling, and filtering and discharging to obtain the aqueous photocuring resin.
The multiple silicon modified waterborne light-cured resin obtained by the preparation method is applied to preparation of gloss oil.
Preferably, the gloss oil is prepared from the following raw materials in parts by weight: 90 parts of waterborne light-cured resin, 0.4-0.8 part of wetting agent, 0-2 parts of silicon dioxide aqueous dispersion, 0.1-0.2 part of flatting agent, 0.1-0.2 part of defoaming agent, 0.3-0.5 part of neutralizing agent, 0.3-0.5 part of thickening agent, 5-8 parts of film-forming assistant, 0.5-1 part of silicon complexing agent, 3-5 parts of deionized water and 1-2 parts of photoinitiator.
Preferably, the preparation method of the gloss oil is as follows: adding 60% of aqueous light-cured resin and deionized water into a stirring kettle, stirring at 30r/min, sequentially adding a wetting agent and a film-forming auxiliary agent, then adding a photoinitiator, a silicon dioxide aqueous dispersion, a silicon complexing agent and an 1/3 defoaming agent, stirring for 15min, then rotating at a speed of 60r/min, adding a flatting agent, a neutralizing agent and a thickening agent, stirring for 10-15 min, finally reducing the rotating speed to 15r/min, adding the remaining 40% of aqueous light-cured resin and 2/3 defoaming agent, stirring for 15min, filtering and discharging at 200-300 meshes.
Preferably, the coalescent is pre-mixed with 1/3 of deionized water prior to addition.
Compared with the products in the prior art, the nano silicon material greatly improves the physical and chemical properties of heat resistance, anti-fouling property, wear resistance, adhesive force, boiling resistance, solvent resistance and the like of the resin, improves the Tg point and the refractive index, enhances the compatibility, greatly improves the gloss, achieves or even exceeds the quality of oily products, has good mechanical stability and storage stability of the final products, and is suitable for industrial production.
Detailed Description
The following is a detailed description of specific embodiments of the invention.
Example 1
The multiple silicon modified waterborne light-cured resin is prepared from the following raw materials in parts by weight: 41.57 parts of isophorone diisocyanate, 9.17 parts of polycaprolactone diol (Mn1000), 13.76 parts of polycarbonate diol (Mn1000), 0.056 part of organic bismuth, 0.84 part of trimethylolpropane, 2.9 parts of 1, 4-butanediol, 10 parts of silicon diol (Mn1000), 6.22 parts of dimethylolbutyric acid, KH 5501.5 parts of silicon coupling agent, triethylamine, 4.5 parts of adipic acid dihydrazide, 5.8 parts of deionized water, 40 parts of butanone, 5 parts of NMP, 10 parts of acetone, 10100.24 parts of antioxidant, 0.08 part of phenol and 15.5 parts of hydroxyethyl methacrylate.
The preparation method of the multiple silicon modified waterborne light-cured resin comprises the following steps:
step S1, adding isophorone diisocyanate, NMP, acetone, butanone, 1/3 organic bismuth and antioxidant 1010 into a reaction kettle provided with a condenser and a water separator, introducing nitrogen, heating to 82 ℃, respectively adding polycaprolactone diol, polycarbonate diol, trimethylolpropane, 1, 4-butanediol, dimethylolbutyric acid and silicon diol, reacting for 5 hours, and cooling to 68 ℃;
step S2, adding hydroxyethyl methacrylate, the rest 2/3 organic bismuth and phenol into the reaction kettle in sequence, and reacting for 3 hours at 65 ℃;
step S3, cooling the materials in the reaction kettle to 35-45 ℃, adding a silicon coupling agent KH550, and reacting for 40min to obtain a prepolymer;
step S4, adding triethylamine into a reaction kettle, adjusting the pH to 6-7 (weak acidity or near neutrality) under the condition that the temperature of the reaction kettle is lower than 25 ℃, stirring at a constant speed for 25min at a medium speed, adding deionized water at the temperature of lower than 25 ℃, stirring at a high speed, adding the adipic acid dihydrazide dissolved in water into the mixture in a trickle manner, and extending the chain at the temperature of 25 ℃ for 45min to obtain a water dispersion;
the above aqueous dispersion, appearance: colorless, tasteless and transparent with blue light; solid content: 36.9 percent; pH: 6-7; viscosity (mps): 762;
and step S5, transferring the aqueous dispersion into a desolventizing kettle provided with a condenser and a collecting tank, removing the solvent for 5 hours in vacuum at 55 ℃ until no odor is produced in the aqueous dispersion sample, and filtering and discharging the aqueous dispersion sample through a 300-mesh filter pump to obtain the aqueous photocuring resin.
The application of the multi-silicon modified waterborne photocurable resin obtained by the preparation method in preparing the gloss oil is as follows:
the gloss oil is prepared from the following raw materials in parts by weight: 90 parts of water-based photocuring resin, 0.62 part of wetting agent (TEGO245), 0.8 part of silicon dioxide aqueous dispersion (30%, sold in the market), 0.13 part of leveling agent (TEGO410), 0.16 part of defoaming agent (TEGO843), 0.4 part of neutralizing agent (sold in the market), 0.4 part of thickening agent (Haimines 299), 7.07 parts of film-forming assistant (sold in the market), 0.72 part of silicon complexing agent (sold in the market), 4 parts of deionized water and 1.2 parts of photoinitiator (Pasteur 2959).
The preparation method of the gloss oil comprises the following steps: adding 60% of aqueous light-cured resin and 2/3% of deionized water into a stirring kettle, stirring at the rotating speed of 30r/min, sequentially adding a wetting agent and a film-forming auxiliary agent (pre-mixing with 1/3% of deionized water before adding), then adding a photoinitiator, a silicon dioxide aqueous dispersion, a silicon complexing agent and a 1/3 defoaming agent, stirring for 15min, then regulating the rotating speed to 60r/min, adding a flatting agent, a neutralizing agent and a thickening agent, stirring for 15min, finally reducing the rotating speed to 15r/min, adding the remaining 40% of aqueous light-cured resin and 2/3 defoaming agent, stirring for 15min, and filtering by a 300-mesh sieve to discharge.
The gloss oil prepared by the method is used for construction test:
1. base material: stainless steel, aluminum alloy, glass, stone, and the like;
2. pretreatment of a base material: polishing the metal surface, and ultrasonically washing the surfaces of glass and stone;
3. coating: spraying → leveling (1-2 minutes) → IR (ultra-red heating for 5 minutes) → ultraviolet irradiation after surface drying for 10-20 seconds → molding;
4. performance detection
4.1 gloss (60) > 96; the hardness is more than 4H; adhesion force: level 0; positive recoil (50 cm): passing;
4.2 boiling resistant for 4 h: no change is made; alcohol resistance (95% alcohol, 2 h): no change is made; acid resistance (sulfuric acid 10%, 2 h): no change is made; alkali resistance (sodium hydroxide 10%, 2 h): no change is made; salt resistance (10% sodium chloride, 144 h): no change is made; abrasion resistance (750g/500r) < 0.02; heat resistance (160, 24 h): no change is made; yellowing resistance (200W uv lamp, 144 h): no change is made;
4.3 stain resistance (fountain pen, soy sauce, shoe polish): can be wiped off;
4.4 Cold-Heat cycle (70/4h, -20/4h, 25/16 h): the grid is scribed for three times without falling off.
Example 2
The multiple silicon modified waterborne light-cured resin is prepared from the following raw materials in parts by weight: 24 parts of hydrogenated MDl diisocyanate, 10 parts of isophorone diisocyanate, 30 parts of polycarbonate diol (Mn2000), 0.1 part of dibutyltin dilaurate, 1.4 parts of trimethylolpropane, 1.63 parts of 1, 4-butanediol, 1 part of silicon diol (Mn2000), 3 parts of dimethylolpropionic acid, 1 part of silicon coupling agent KBM 6021, 2.27 parts of triethylamine, 8 parts of isophorone diamine, 156 parts of deionized water, 50 parts of butanone, 8.6 parts of polyester diol sulfonate (Mn750), 20 parts of diethylene glycol malonate, 10100.2 parts of antioxidant, 0.08 part of hydroxy ether phenol and 19 parts of pentanediol triacrylate.
The preparation method of the multiple silicon modified waterborne light-cured resin comprises the following steps:
step S1, adding hydrogenated MDl diisocyanate, isophorone diisocyanate, diethyl malonate, butanone, 1/3 dibutyltin dilaurate and antioxidant 1010 into a reaction kettle provided with a condenser and a water separator, introducing nitrogen, heating to 83 ℃, respectively adding polycarbonate diol, trimethylolpropane, 1, 4-butanediol, dimethylolpropionic acid, polyester diol sulfonate and silicon diol, reacting for 6 hours, and cooling to 70 ℃;
step S2, adding pentaerythritol triacrylate, the rest of 2/3 dibutyltin dilaurate and hydroxy ether phenol into a reaction kettle in sequence, and reacting at 70 ℃ for 4 hours;
step S3, cooling the materials in the reaction kettle to 45 ℃, adding a silicon coupling agent KBM602, and reacting for 50min to obtain a prepolymer;
step S4, adding triethylamine into a reaction kettle, adjusting the pH to 6-7 (weak acidity or near neutrality) under the condition that the kettle temperature is lower than 25 ℃, stirring at a constant speed for 30min, adding deionized water at a temperature lower than 25 ℃, stirring (dispersing at a high speed), adding water-dissolved isophorone diamine into the mixture in a trickle flow, and extending the chain at a temperature of 25 ℃ for 60min to obtain a water dispersion;
the above aqueous dispersion, appearance: colorless, tasteless and transparent with blue light; solid content: 49.6 percent; pH: 6-7; viscosity (mps): 805;
and step S5, transferring the aqueous dispersion into a desolventizing kettle provided with a condenser and a collecting tank, removing the solvent for 6 hours in vacuum at 60 ℃ until no odor is produced in the aqueous dispersion sample, and filtering and discharging the aqueous dispersion through a 300-mesh filter pump to obtain the aqueous photocuring resin.
The application of the multi-silicon modified waterborne photocurable resin obtained by the preparation method in preparing the gloss oil is as follows:
the gloss oil is prepared from the following raw materials in parts by weight: 90 parts of water-based photocuring resin, 0.73 part of wetting agent (TEGO245), 0.72 part of silicon dioxide aqueous dispersion (30%, sold in the market), 0.15 part of leveling agent (TEGO410), 0.14 part of defoaming agent (TEGO843), 0.3 part of neutralizing agent (sold in the market), 0.5 part of thickening agent (Haimines 299), 6.96 parts of film-forming assistant (sold in the market), 0.8 part of silicon complexing agent (sold in the market), 3.7 parts of deionized water and 1.5 parts of photoinitiator (Pasteur 2959).
The preparation method of the gloss oil comprises the following steps: adding 60% of aqueous light-cured resin and 2/3% of deionized water into a stirring kettle, stirring at the rotating speed of 30r/min, sequentially adding a wetting agent and a film-forming auxiliary agent (pre-mixing with 1/3% of deionized water before adding), then adding a photoinitiator, a silicon dioxide aqueous dispersion, a silicon complexing agent and a 1/3 defoaming agent, stirring for 15min, then regulating the rotating speed to 60r/min, adding a flatting agent, a neutralizing agent and a thickening agent, stirring for 15min, finally reducing the rotating speed to 15r/min, adding the remaining 40% of aqueous light-cured resin and 2/3 defoaming agent, stirring for 15min, and filtering by a 300-mesh sieve to discharge.
The gloss oil prepared by the method is used for construction test:
1. base material: plastics (PVC, PS, PET, ABS and PC), organic glass, and the like;
2. pretreatment of a base material: electrophoretic plasma treatment;
3. coating: spraying → leveling (1-2 minutes) → IR (ultra-red heating for 5 minutes) → ultraviolet irradiation after surface drying for 10-20 seconds → molding;
4. performance detection
4.1 gloss (60) > 96; the hardness is more than 4H; adhesion force: level 0; positive recoil (50 cm): passing;
4.2 boiling resistant for 4 h: no change is made; alcohol resistance (95%, alcohol 2 h): no change is made; acid resistance (sulfuric acid 10%, 2 h): no change is made; alkali resistance (sodium hydroxide 10%, 2 h): no change is made; salt resistance (10% sodium chloride, 144 h): no change is made; abrasion resistance (750g/500r) < 0.02; heat resistance (160, 24 h): no change is made; yellowing resistance (200W uv lamp, 144 h): no change is made;
4.3 stain resistance (fountain pen, soy sauce, shoe polish): can be wiped off;
4.4 Cold-Heat cycle (70/4h, -20/4h, 25/16 h): the grid is scribed for three times without falling off.
Example 3
The multiple silicon modified waterborne light-cured resin is prepared from the following raw materials in parts by weight: 41 parts of hydrogenated MDl diisocyanate, 10.45 parts of nonionic modified polyester diol (Mn1000), 15 parts of polycarbonate diol (Mn2000), 0.1 part of cobalt naphthenate, 1.4 parts of trimethylolpropane, 1.63 parts of 1,6 hexanediol, 2 parts of silicon diol (Mn2000), 4 parts of methyldiethanolamine, 11001 parts of silicon coupling agent A, 3 parts of acetic acid, 185 parts of deionized water, 45 parts of butanone, 5 parts of NMP, 20 parts of acetone, 10100.2 parts of antioxidant, 0.08 part of tert-butylphenol and 16 parts of ethylene glycol acrylate.
The preparation method of the multiple silicon modified waterborne light-cured resin comprises the following steps:
step S1, adding hydrogenated MDl diisocyanate, butanone 4, NMP, acetone, 1/3 cobalt naphthenate and an antioxidant 1010 into a reaction kettle provided with a condenser and a water separator, introducing nitrogen, heating to 80 ℃, respectively adding polycarbonate diol, trimethylolpropane, 1,6 hexanediol, nonionic modified polyester diol, methyl diethanolamine and silicon diol, reacting for 4 hours, and cooling to 65 ℃;
step S2, adding ethylene glycol acrylate, the rest 2/3 cobalt naphthenate and tert-butylphenol into a reaction kettle in sequence, and reacting for 2 hours at 60 ℃;
step S3, cooling the materials in the reaction kettle to 35 ℃, adding a silicon coupling agent A1100, and reacting for 30min to obtain a prepolymer;
step S4, adding acetic acid into a reaction kettle, adjusting the pH to 6-7 (weak acidity or near neutrality) under the condition that the temperature of the reaction kettle is lower than 25 ℃, stirring at a constant speed for 20min at a medium speed, adding deionized water at the temperature of lower than 25 ℃, stirring at a high speed, adding deionized water in a trickle manner, and extending the chain at the temperature of 25 ℃ for 60min to obtain a water dispersion;
the above aqueous dispersion, appearance: colorless, tasteless and transparent with blue light; solid content: 35.6 percent; pH: 7; viscosity (mps): 1000, parts by weight;
and step S5, transferring the aqueous dispersion into a desolventizing kettle provided with a condenser and a collecting tank, removing the solvent for 4 hours in vacuum at 55 ℃ until no odor is produced in the aqueous dispersion sample, and filtering and discharging the aqueous dispersion through a 300-mesh filter pump to obtain the aqueous photocuring resin.
The application of the multi-silicon modified waterborne photocurable resin obtained by the preparation method in preparing the gloss oil is as follows:
the gloss oil is prepared from the following raw materials in parts by weight: 90 parts of water-based photocuring resin, 0.52 part of wetting agent (TEGO245), 1.88 parts of silicon dioxide aqueous dispersion (30%, sold in the market), 0.2 part of leveling agent (TEGO410), 0.2 part of defoaming agent (TEGO843), 0.3 part of neutralizing agent (sold in the market), 0.3 part of thickening agent (Haimines 299), 5.83 parts of film-forming assistant (sold in the market), 0.98 part of silicon complexing agent (sold in the market), 3 parts of deionized water and 2 parts of photoinitiator (Pasteur 2959).
The preparation method of the gloss oil comprises the following steps: adding 60% of aqueous light-cured resin and 2/3% of deionized water into a stirring kettle, stirring at the rotating speed of 30r/min, sequentially adding a wetting agent and a film-forming auxiliary agent (pre-mixing with 1/3% of deionized water before adding), then adding a photoinitiator, a silicon dioxide aqueous dispersion, a silicon complexing agent and a 1/3 defoaming agent, stirring for 15min, then regulating the rotating speed to 60r/min, adding a flatting agent, a neutralizing agent and a thickening agent, stirring for 10-15 min, finally reducing the rotating speed to 15r/min, adding the remaining 40% of aqueous light-cured resin and 2/3 defoaming agent, stirring for 15min, and filtering and discharging at a 200-300 mesh sieve.
The gloss oil prepared by the method is used for construction test:
1. base material: plastics (PP, XPE), nylon, bass, etc.;
2. pretreatment of a base material: removing dirt and dust;
3. coating: spraying → leveling (1-2 minutes) → IR (ultra-red heating for 5 minutes) → ultraviolet irradiation after surface drying for 10-20 seconds → molding;
4. performance detection
4.1 gloss (60) > 96; the hardness is more than 4H; adhesion force: level 0; elongation percentage: 400 percent; positive recoil (50 cm): passing;
4.2 boiling resistant for 4 h: no change is made; alcohol resistance (95% alcohol, 2 h): no change is made; acid resistance (sulfuric acid 10%, 2 h): no change is made; alkali resistance (sodium hydroxide 10%, 2 h): no change is made; salt resistance (10% sodium chloride, 144 h): no change is made; abrasion resistance (750g/500r) < 0.02; heat resistance (160, 24 h): no change is made; yellowing resistance (200W uv lamp, 144 h): no change is made;
4.3 stain resistance (fountain pen, soy sauce, shoe polish): can be wiped off;
4.4 Cold-Heat cycle (70/4h, -20/4h, 25/16 h): the grid is scribed for three times without falling off.
The above embodiments are merely preferred embodiments of the present invention, and any simple modification, modification and substitution changes made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The preparation method of the multiple silicon modified waterborne photocurable resin is characterized by comprising the following steps:
s1, preparing a polyurethane intermediate with a main chain soft end containing silicon and hydrophilic groups;
s2, grafting acrylic ester containing active double bonds on the intermediate prepared in the S1;
s3, grafting an end-capped silicon monomer on the intermediate prepared in the S2 to synthesize a prepolymer;
s4, neutralizing the prepolymer prepared in the S3, and then sequentially dispersing in water and extending chain in water to prepare a water dispersion;
and S5, desolventizing the aqueous dispersion prepared in the step S4 to prepare the aqueous light-cured resin.
2. The method for preparing the multiple silicon modified waterborne photocurable resin of claim 1, wherein in step S1, diisocyanate, a solvent, 1/3-1/2 catalyst and an antioxidant are added into a reaction kettle provided with a condenser and a water separator, nitrogen is introduced, the temperature is raised to 80-83 ℃, polyol, hydrophilic monomer and hydroxyl silicon are respectively added, the reaction is carried out for 4-6 hours, and the temperature is lowered to 65-70 ℃;
wherein the dosage of the diisocyanate accounts for 30-45% of the solid content of the prepolymer, and the diisocyanate is selected from one or two of HDl, lPDl, XDl and H12 MDl;
the using amount of the polyhydric alcohol accounts for 30-35% of the solid content of the prepolymer, and three or four of caprolactone dihydric alcohol, dimer acid dihydric alcohol, carbonate dihydric alcohol, tetrahydrofuran dihydric alcohol, 1,4 butanediol, 1,6 hexanediol, trimethylolpropane, caprolactone trihydric alcohol and tetrahydrofuran trihydric alcohol are selected;
the dosage of the hydroxyl silicon accounts for 1-5% of the solid content of the prepolymer, and the hydroxyl silicon is selected from one or two of silicon dihydric alcohol and hydroxyphenyl silicon resin;
the amount of the hydrophilic monomer accounts for 4-7% of the solid content of the prepolymer, and the hydrophilic monomer is selected from one or two of nonionic modified polyester dihydric alcohol, hydroxy propionic acid, hydroxy butyric acid, methyl diethanolamine and polyester dihydric alcohol sulfonate;
the dosage of the solvent accounts for 30-50% of the solid content of the prepolymer, and the solvent is selected from two or three of methyl pyrrolidone, diethyl malonate, acetone and butanone.
3. The method for preparing the multiple silicon modified waterborne photocurable resin as claimed in claim 2, wherein in step S2, acrylate containing active double bonds, the rest catalyst and polymerization inhibitor are sequentially added into a reaction kettle, and the reaction is carried out at 60-70 ℃ for 2-4 h;
wherein the dosage of the acrylate containing the active double bonds accounts for 15-25% of the solid content of the prepolymer, and the acrylate is one or two selected from hydroxyethyl methacrylate, ethylene glycol acrylate and pentaerythritol triacrylate;
the catalyst is selected from one of organic bismuth, dibutyltin dilaurate and cobalt naphthenate;
the polymerization inhibitor is selected from one of phenol, hydroxy ether phenol and tert-butyl phenol.
4. The preparation method of the multiple silicon modified waterborne photocurable resin as claimed in claim 3, wherein in step S3, the temperature of the materials in the reaction kettle is reduced to 35-45 ℃, the end-capped silicon monomer is added, and the reaction is carried out for 30-50 min to obtain a prepolymer;
the amount of the end-capping silicon monomer accounts for 1-3% of the solid content of the prepolymer, and is selected from one of the following silicon coupling agents KH550, A1100, 1110, 1120, KBM602 and 603.
5. The method for preparing the multiple silicon modified waterborne photocurable resin as claimed in claim 4, wherein in step S4, a neutralizing agent is added into a reaction kettle, the pH value is adjusted to 6-7 under the condition that the temperature of the kettle is lower than 25 ℃, the mixture is uniformly stirred for 20-30 min, deionized water with the temperature lower than 25 ℃ is added for stirring, then a water-dissolved chain extender is added in a trickle manner, and the chain extension is carried out for 30-60 min at 25 ℃ to obtain an aqueous dispersion;
the content of the neutralizing agent accounts for 3-5% of the solid content of the prepolymer, and the neutralizing agent is selected from one of formic acid, acetic acid, dimethylethanolamine, methyldiethanolamine and triethylamine;
the using amount of the chain extender accounts for 0-4% of the solid content of the prepolymer, and the chain extender is selected from one of ethylenediamine, adipic acid dihydrazide and isophorone diamine.
6. The method for preparing the multiple silicon modified aqueous photocurable resin according to claim 5, wherein in step S5, the aqueous dispersion is transferred into a desolventizing kettle provided with a condenser and a collecting tank, the solvent is removed in vacuum at 50-60 ℃ for 4-6 h until the aqueous dispersion is odorless after sampling, and the discharging is filtered to obtain the aqueous photocurable resin.
7. The application of the multiple silicon modified water-based light-cured resin obtained by the preparation method of any one of claims 1 to 6 in preparation of gloss oil.
8. The application of the multiple silicon modified waterborne photocurable resin of claim 7 in preparing gloss oil, wherein the gloss oil is prepared from the following raw materials in parts by weight: 90 parts of waterborne light-cured resin, 0.4-0.8 part of wetting agent, 0-2 parts of silicon dioxide aqueous dispersion, 0.1-0.2 part of flatting agent, 0.1-0.2 part of defoaming agent, 0.3-0.5 part of neutralizing agent, 0.3-0.5 part of thickening agent, 5-8 parts of film-forming assistant, 0.5-1 part of silicon complexing agent, 3-5 parts of deionized water and 1-2 parts of photoinitiator.
9. The application of the multiple silicon modified water-based light-cured resin in preparing gloss oil according to claim 8, wherein the preparation method of the gloss oil comprises the following steps: adding 60% of aqueous light-cured resin and deionized water into a stirring kettle, stirring at 30r/min, sequentially adding a wetting agent and a film-forming auxiliary agent, then adding a photoinitiator, a silicon dioxide aqueous dispersion, a silicon complexing agent and an 1/3 defoaming agent, stirring for 15min, then rotating at a speed of 60r/min, adding a flatting agent, a neutralizing agent and a thickening agent, stirring for 10-15 min, finally reducing the rotating speed to 15r/min, adding the remaining 40% of aqueous light-cured resin and 2/3 defoaming agent, stirring for 15min, filtering and discharging at 200-300 meshes.
10. The use of the multiple silicon-modified waterborne photocurable resin of claim 9 in the preparation of a gloss oil, wherein said coalescent is pre-mixed with 1/3 deionized water prior to addition.
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| CN111334152A (en) * | 2020-04-17 | 2020-06-26 | 杭州海维特化工科技有限公司 | Water-based flame-retardant gloss oil and preparation method thereof |
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