CN108948316B - Organic silicon modified polyurethane emulsion, wood lacquer, preparation method and application thereof - Google Patents
Organic silicon modified polyurethane emulsion, wood lacquer, preparation method and application thereof Download PDFInfo
- Publication number
- CN108948316B CN108948316B CN201810629583.2A CN201810629583A CN108948316B CN 108948316 B CN108948316 B CN 108948316B CN 201810629583 A CN201810629583 A CN 201810629583A CN 108948316 B CN108948316 B CN 108948316B
- Authority
- CN
- China
- Prior art keywords
- parts
- wood lacquer
- modified polyurethane
- polyurethane emulsion
- organic silicon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6659—Compounds of group C08G18/42 with compounds of group C08G18/34
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/61—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6541—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/34
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to an organic silicon modified polyurethane emulsion, wood lacquer, a preparation method and application thereof, wherein the organic silicon modified polyurethane emulsion is mainly prepared from the following components in parts by mass: 80-120 parts of carbon dioxide copolymer polyol, 2-20 parts of hydroxyl silicone oil, 20-60 parts of aromatic diisocyanate, 0.1-5 parts of micromolecular chain extender, 2-10 parts of hydrophilic chain extender, 1-10 parts of salt forming agent and 150-250 parts of solvent. A paint film formed by the organosilicon modified polyurethane emulsion has high mechanical strength and high water resistance and chemical resistance.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to an organic silicon modified polyurethane emulsion, wood lacquer, a preparation method and application thereof.
Background
With the rapid development of economy, environmental pollution is becoming more serious, and national haze is formed in autumn and winter every year, and in order to solve the problem, the state academy promotes ecological civilization construction and environmental protection work since 2015, and the central environment protection is supervised to be in a normal state, so that national green storms are more and more advanced. The solvent-based wood lacquer has a large usage amount, generates a large amount of Volatile Organic Compounds (VOC) emission, and gradually limits the usage of solvent-based coatings and adhesives nationwide. Coatings made from waterborne polyurethanes can greatly ameliorate this problem and are therefore widely used. However, the aqueous polyurethane emulsion contains more hydrophilic groups, and after the aqueous polyurethane emulsion is mixed with the acrylic emulsion to prepare a coating product, the coating product is easy to absorb water, so that the product has poor adhesive force, is not resistant to water immersion, is easy to corrode by chemical reagents, seriously influences the service life of related products, and limits the application of the coating product.
Disclosure of Invention
Based on the above, it is necessary to provide an organosilicon modified polyurethane emulsion and a wood lacquer with strong water resistance and chemical resistance, and a preparation method and an application thereof.
An organic silicon modified polyurethane emulsion is mainly prepared from the following components in parts by mass: 80-120 parts of carbon dioxide copolymer polyol, 2-20 parts of hydroxyl silicone oil, 20-60 parts of aromatic diisocyanate, 0.1-5 parts of micromolecular chain extender, 2-10 parts of hydrophilic chain extender, 1-10 parts of salt forming agent and 150-250 parts of solvent.
The organic silicon modified polyurethane emulsion adopts carbon dioxide copolymer polyol, hydroxyl silicone oil and aromatic diisocyanate as raw materials, and is supplemented with a small molecular chain extender, a hydrophilic chain extender and a salt forming agent in proper amounts, so that the mechanical property of a glue film formed by the prepared organic silicon modified polyurethane emulsion is greatly improved. The carbon dioxide copolymer polyol molecule contains a large amount of carbonate bonds and ether bonds, the aromatic diisocyanate contains aromatic groups with strong rigidity, and the bonds enable the polyurethane to be prepared easily through forming strong intramolecular and intermolecular hydrogen bonds, so that the product has high mechanical properties; in addition, the carbon dioxide copolymer polyol contains a large amount of side methyl groups, and the side methyl groups limit the internal rotation of a carbonate bond and an ether bond, so that the surface of the prepared waterborne polyurethane adhesive film has higher hardness, and the mechanical property of the polyurethane emulsion adhesive film is obviously improved.
In one embodiment, the carbon dioxide copolymer polyol is 90 to 110 parts, the hydroxyl silicone oil is 5 to 10 parts, the aromatic diisocyanate is 25 to 50 parts, the small molecular chain extender is 0.5 to 3 parts, the hydrophilic chain extender is 4 to 8 parts, the salt forming agent is 3 to 8 parts, and the solvent is 180 to 220 parts.
In one embodiment, the carbon dioxide copolymer polyol is 95 to 105 parts, the hydroxyl silicone oil is 6 to 8 parts, the aromatic diisocyanate is 30 to 40 parts, the small molecular chain extender is 0.5 to 3 parts, the hydrophilic chain extender is 4 to 8 parts, the salt forming agent is 3 to 8 parts, and the solvent is 190 to 210 parts.
In one embodiment, the aromatic diisocyanate is selected from one or more of toluene diisocyanate and diphenylmethane diisocyanate.
The aromatic diisocyanate is selected to enhance the mechanical property of the adhesive film of the organosilicon modified polyurethane emulsion.
In one embodiment, the carbon dioxide copolymer polyol has a number average molecular weight of 1000 to 8000g/mol, a hydroxyl functionality of 2 to 6, and a mole fraction of carbonate groups in a molecule of 0.25 to 0.45.
In one embodiment, the hydroxyl silicone oil has a hydroxyl content of 4-12%.
In one embodiment, the hydroxyl silicone oil has a hydroxyl content of 6-10%.
In one embodiment, the mass ratio of the salt forming agent to the hydrophilic chain extender is 1: (1.2-1.4).
In one embodiment, the salt forming agent is selected from one or more of triethylamine, tripropylamine, tributylamine, sodium hydroxide and ammonia.
In one embodiment, the hydrophilic chain extender is selected from one or more of N, N-dihydroxyethyl monomaleamic acid, dimethylolpropionic acid, dimethylolbutyric acid, N- (2-hydroxyethyl) -2-aminoethanesulfonic acid, and N- (2-aminoethyl) -2-aminopropanesulfonic acid.
In one embodiment, the small molecule chain extender is selected from one or more of ethylene glycol, butylene glycol, diethylene glycol, dipropylene glycol, 1, 6-hexanediol, 1, 3-propanediol, 1, 2-propanediol, 1, 4-hydroxymethylcyclohexane, trimethylpentanediol, di-n-butylamine, ethylenediamine, trimethylhexamethylenediamine, tetraethylenepentamine, diethylenetriamine and isophorone diamine.
In one embodiment, the solvent is water.
A method for preparing the organosilicon modified polyurethane emulsion comprises the following steps:
mixing the carbon dioxide copolymer polyol, the hydroxyl silicone oil and the hydrophilic chain extender, adding the aromatic diisocyanate at the temperature of 30-60 ℃, and uniformly stirring;
stirring at 75-95 deg.C for 3-5 hr; cooling to 50-75 ℃, adding the small molecular chain extender, and uniformly stirring;
cooling to 10-50 deg.C, adding the salt forming agent, and stirring;
and adding the solvent, and dispersing to obtain the organic silicon modified polyurethane emulsion.
According to the preparation method of the organic silicon modified polyurethane emulsion, the components are added step by step at different temperatures, so that the polymerization reaction is more sufficient, the yield can be obviously improved, and the physical properties of the obtained emulsion can be ensured. In addition, the preparation method is simple and easy to implement, does not need special instruments and operation requirements, and is suitable for industrial production and application.
The application of the organic silicon modified polyurethane emulsion in the preparation of wood lacquer.
The glue film formed by the organic silicon modified polyurethane emulsion has water resistance and chemical resistance, and is suitable for preparing wood lacquer.
A wood lacquer is mainly prepared from the following components in parts by weight: 30-80 parts of the organic silicon modified waterborne polyurethane emulsion, 5-50 parts of waterborne acrylic emulsion, 0.5-20 parts of additive and 10-30 parts of solvent.
The wood lacquer is prepared by mixing the organic silicon modified waterborne polyurethane emulsion and the waterborne acrylic emulsion in a specific ratio, so that an interpenetrating network structure is formed after the two are formed into a film, the crosslinking density is improved, and the water resistance and the chemical property of the wood lacquer are obviously improved.
In addition, the wood lacquer introduces organic silicon onto a molecular chain of the waterborne polyurethane through copolymerization modification, so that the film forming property of the obtained wood lacquer is improved, and a formed film has good smooth hand feeling.
In one embodiment, the organosilicon modified waterborne polyurethane emulsion is 40-70 parts, the waterborne acrylic emulsion is 10-45 parts, the additive is 3-10 parts, and the solvent is 20-30 parts.
In one embodiment, the organosilicon modified waterborne polyurethane emulsion is 45-60 parts, the waterborne acrylic emulsion is 10-45 parts, the additive is 3-10 parts, and the solvent is 20-30 parts.
In one embodiment, the glass transition Temperature (TG) of the aqueous acrylic emulsion is 40-45 ℃.
In one embodiment, the aqueous acrylic emulsion is an aqueous hydroxy acrylic emulsion with a hydroxyl value of 1.2-1.8%.
In one embodiment, the additive comprises the following components in parts by weight: 0.1-0.5 part of defoaming agent, 0.1-0.5 part of bactericide, 0.2-1 part of wetting agent, 0.2-1 part of flatting agent, 0.1-0.8 part of pH regulator, 0.2-2 parts of film-forming assistant, 0.2-4 parts of thickening agent and 0-10 parts of color concentrate.
In one embodiment, the defoamer is one or more of BKY024, BKY028, BYK018, BYK019, and BYK 1770.
In one embodiment, the germicide is the dow LXE.
In one embodiment, the leveling agent is one or more of BKY333, BYK190, BYK191, BYK192, BYK2055, and BYK 2060.
In one embodiment, the wetting agent is one or more of TEGO450 and TEGO 500.
In one embodiment, the pH regulator is one or more of ammonia, triethylamine, dimethylethanolamine and 2-amino-2-methyl-1-propanol.
In one embodiment, the coalescent is one or more of alcohol ester 12, dipropylene glycol methyl ether, dipropylene glycol butyl ether, propylene glycol, and ethylene glycol.
In one embodiment, the thickener is one or more of Rohm and Haas 8w, Rohm and Haas RM2020, Rohm and Haas TT935, Rohm and Haas ASE-60, BYK420 and BYK 425.
In one embodiment, the color concentrate is an aqueous color concentrate.
In one embodiment, the solvent is water.
The method for preparing the wood lacquer comprises the following steps:
preparing the organic silicon modified polyurethane emulsion;
and mixing the organic silicon modified polyurethane emulsion, the water-based acrylic emulsion and the additive with the solvent, and uniformly dispersing to obtain the coating.
The method is simple and convenient to operate, does not need special instruments, and is suitable for industrial production and application.
The wood lacquer is applied to the preparation of wooden furniture.
The paint film formed by the wood lacquer has high water resistance, high chemical resistance and good smoothness, is suitable for preparing wood furniture, and can obviously prolong the service life of the furniture.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
(1) Preparation of organosilicon modified polyurethane emulsion
Adding 100 parts of carbon dioxide copolymer polyol (Mn is 3000), 6 parts of hydroxy silicone oil and 7 parts of dimethylolpropionic acid under the stirring condition of 500RPM, and heating to 60 ℃; adding 47 parts of toluene diisocyanate, and stirring for 0.5 hour; heating to 85 ℃ and reacting for 3 hours; cooling to 70 ℃, adding 1 part of ethylene glycol, reacting for 1 hour, adding 5.2 parts of triethylamine, and stirring for 0.5 hour; and (3) adding 200 parts of water under the high-speed stirring condition of 1500RPM, and stirring for 15 minutes to obtain the organic silicon modified polyurethane emulsion of the embodiment 1.
And (3) forming the prepared organic silicon modified polyurethane emulsion into a film at normal temperature for 24 hours, and drying at the temperature of 80 ℃ for 12 hours to obtain the waterborne polyurethane adhesive film of the embodiment 1.
(2) Preparation of wood lacquer
Under the stirring condition of 500PRM, adding 27 parts of water into a dispersion cylinder, and then respectively adding 0.2 part of BKY333, 0.1 part of Dow LXE, 0.4 part of TEGO450 and 0.1 part of BKY024, and dispersing for 5-30min by using a film-forming aid, namely dipropylene glycol butyl ether; dispersing for 5-30 min; then 45 parts of the organosilicon modified polyurethane emulsion and 10 parts of the aqueous acrylic emulsion (TG value is 40 ℃) are added, and the dispersion is carried out for 5-30min at the rotating speed of 500-1500PRM, and then 0.3 part of pH regulator, 2 parts of thickening agent, 8 parts of aqueous color concentrate and the dispersion is carried out for 5-30min at the rotating speed of 500-1500PRM are added, thus obtaining the wood lacquer of the embodiment 1.
Example 2
(1) Preparation of organosilicon modified polyurethane emulsion
Adding 100 parts by mass of carbon dioxide copolymer polyol (Mn is 3000), 10 parts of hydroxy silicone oil and 8 parts of dimethylolpropionic acid under the stirring condition of 500RPM, and heating to 60 ℃; adding 50 parts of toluene diisocyanate, and stirring for 0.5 hour; heating to 80 ℃ and reacting for 4 hours; cooling to 70 ℃, adding 3 parts of butanediol, reacting for 1 hour, adding 6 parts of triethylamine by mass, and stirring for 0.5 hour; and (3) adding 200 parts of water under the high-speed stirring condition of 1500RPM, and stirring for 15 minutes to obtain the organic silicon modified polyurethane emulsion of the embodiment 2.
And (3) forming the prepared organic silicon modified polyurethane emulsion into a film at normal temperature for 24 hours, and drying the film at the temperature of 80 ℃ for 12 hours to obtain the waterborne polyurethane adhesive film of the embodiment 2.
(2) Preparation of wood lacquer
Under the stirring condition of 500PRM, adding 27 parts of water into a dispersion cylinder, and then respectively adding 0.2 part of BKY333, 0.1 part of Dow LXE, 0.4 part of TEGO450 and 0.1 part of BKY024, and dispersing for 5-30min by using a film-forming aid, namely dipropylene glycol butyl ether; dispersing for 5-30 min; and adding 50 parts of the organic silicon modified polyurethane emulsion and 15 parts of the water-based acrylic emulsion, dispersing at the rotation speed of 500 plus 1500PRM for 5-30min, adding 0.3 part of pH regulator, 2 parts of thickening agent, 8 parts of water-based color concentrate, and dispersing at the rotation speed of 500 plus 1500PRM for 5-30min to obtain the wood lacquer of the embodiment 2.
Example 3
(1) Preparation of organosilicon modified polyurethane emulsion
Adding 100 parts of carbon dioxide copolymer polyol (Mn is 3000), 5 parts of hydroxyl silicone oil and 8 parts of dimethylolpropionic acid under the stirring condition of 500RPM, heating to 60 ℃, adding 50 parts of toluene aromatic diisocyanate, and stirring for 0.5 hour; heating to 80 ℃ and reacting for 4 hours; cooling to 70 ℃, adding 3 parts of butanediol, reacting for 1 hour, adding 6 parts of triethylamine, and stirring for 0.5 hour; 200 parts of water was added thereto under high-speed stirring at 1500RPM, and stirred for 15 minutes to obtain the silicone-modified polyurethane emulsion of example 3.
And (3) forming the prepared organic silicon modified polyurethane emulsion into a film at normal temperature for 24 hours, and drying at the temperature of 80 ℃ for 12 hours to obtain the waterborne polyurethane adhesive film of the embodiment 3.
(2) Preparation of wood lacquer
Under the stirring condition of 500PRM, adding 27 parts of water into a dispersion cylinder, and then respectively adding 0.2 part of BKY333, 0.1 part of Dow LXE, 0.4 part of TEGO450 and 0.1 part of BKY024, and dispersing for 5-30min by using a film-forming aid, namely dipropylene glycol butyl ether; dispersing for 5-30 min; and then 55 parts of the organic silicon modified polyurethane emulsion and 20 parts of the water-based acrylic emulsion are added, and the mixture is dispersed for 5-30min at the rotation speed of 500 plus 1500PRM, and then 0.3 part of pH regulator, 2 parts of thickener, 8 parts of water-based color concentrate and 500 plus 1500PRM are added, and the wood lacquer of the embodiment 3 is obtained.
Example 4
(1) Preparation of organosilicon modified polyurethane emulsion
Adding 100 parts of carbon dioxide copolymer polyol (Mn ═ 2000), 10 parts of hydroxy silicone oil and 8 parts of dimethylolpropionic acid under the stirring condition of 500RPM, and heating to 60 ℃; stirring for 0.5 hour while adding 65 parts of toluene aromatic diisocyanate; heating to 80 ℃ for reaction for 4 hours, cooling to 70 ℃, adding 3 parts of butanediol, reacting for 1 hour, adding 6 parts of triethylamine by mass, and stirring for 0.5 hour; and (3) adding 200 parts of water under the high-speed stirring condition of 1500RPM, and stirring for 15 minutes to obtain the organic silicon modified polyurethane emulsion of the embodiment 4.
And (3) forming the prepared organic silicon modified polyurethane emulsion into a film at normal temperature for 24 hours, and drying at the temperature of 80 ℃ for 12 hours to obtain the waterborne polyurethane adhesive film of the embodiment 4.
(2) Preparation of wood lacquer
Under the stirring condition of 500PRM, adding 27 parts of water into a dispersion cylinder, and then respectively adding 0.2 part of BKY333, 0.1 part of Dow LXE, 0.4 part of TEGO450 and 0.1 part of BKY024, and dispersing for 5-30min by using a film-forming aid, namely dipropylene glycol butyl ether; dispersing for 5-30 min; and adding 70 parts of the organic silicon modified polyurethane emulsion, 40 parts of the aqueous acrylic emulsion, dispersing at the rotation speed of 500 plus 1500PRM for 5-30min, adding 0.3 part of pH regulator, 2 parts of thickener, 8 parts of aqueous color concentrate, and dispersing at the rotation speed of 500 plus 1500PRM for 5-30min to obtain the wood lacquer of the embodiment 4.
Comparative example 1
Substantially the same as in example 4, except that no hydroxy silicone oil was added in the preparation of the silicone-modified polyurethane emulsion.
Comparative example 2
The same as example 4 except that polyoxypropylene diol (Mn ═ 2000) was used in place of carbon dioxide copolymer polyol in the preparation of the silicone-modified polyurethane emulsion.
Comparative example 3
The same as in example 4 except that polybutylene adipate diol (Mn 2000) was used instead of the carbon dioxide copolymer polyol in preparing the silicone-modified polyurethane emulsion.
Comparative example 4
The same as in example 4 except that isophorone diisocyanate was used instead of toluene diisocyanate in preparing the silicone-modified polyurethane emulsion.
Performance testing
Tensile strength, hardness, dirt resistance, aging resistance, contact angle and water resistance tests were respectively carried out on the aqueous polyurethane adhesive films of examples 1 to 4 and comparative examples 1 to 4, and the test results are shown in Table 1.
The wood paints of examples 1 to 4 and comparative examples 1 to 4 were coated on the same material substrate (thickness about 2 to 3 mm) to prepare a coated product, and the coated products were tested, respectively, and the test results are shown in table 2.
The test method is as follows:
(1) the test was carried out using a bench top electronic universal tensile machine model CMT4204 from MTS corporation, usa. The tensile test is carried out according to the GB/T1040-92 standard, the test gauge length is 30mm, and the tensile rate is 200 mm/min.
(2) Pencil hardness was determined according to the national standard GB/T6739-1996 method for measuring film pencil hardness.
(3) The dirt resistance test adopts an oil pen to scratch a paint film once, and then the paint film is wiped by a cloth, and the degree of difficulty of wiping the paint film clean is observed.
(4) Aging resistance the paint film was exposed to the sun for 6 months, then the dust was washed, dried and observed.
(5) The method is characterized in that a Chengdu and an instrument JY-PHb type contact angle tester are adopted for testing, the water contact angle is measured by deionized water, the volume of a liquid drop is about 2.5ul, a picture is taken 15s after the water drop is on a sample adhesive film, and the size of the contact angle is measured by a dose angle method.
(6) The water resistance is carried out according to GB/T4893.1-2005 and GB/T23999-2009;
(7) alkali resistance was carried out according to GB/T23999-2009.
TABLE 1
TABLE 2
As can be seen from table 1 and table 2 above, the organosilicon modified polyurethane emulsions of examples 1 to 4 and the wood lacquer prepared from the emulsions have high water resistance and chemical resistance.
In addition, as can be seen from comparative examples 1 to 4, when the hydroxyl silicone oil was removed (comparative example 1), the water resistance and chemical resistance of the wood lacquer were reduced; when polyoxypropylene glycol was used instead of carbon dioxide copolymer polyol (comparative example 2), the hardness and chemical resistance of the wood lacquer decreased somewhat; when the carbon dioxide copolymer polyol is replaced by the polybutylene adipate glycol (comparative example 3), the hardness and the water resistance of the wood lacquer are reduced; when aliphatic diisocyanate was used instead of toluene diisocyanate (comparative example 4), the hardness of the wood lacquer decreased.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The wood lacquer is characterized by being mainly prepared from the following components in parts by weight: 30-80 parts of organic silicon modified polyurethane emulsion, 5-50 parts of water-based acrylic emulsion, 0.5-20 parts of additive and 10-30 parts of water;
the organic silicon modified polyurethane emulsion is mainly prepared from the following components in parts by mass: 80-120 parts of carbon dioxide copolymer polyol, 2-20 parts of hydroxyl silicone oil, 20-60 parts of aromatic diisocyanate, 0.1-5 parts of micromolecular chain extender, 2-10 parts of hydrophilic chain extender, 1-10 parts of salt forming agent and 150-250 parts of solvent; the hydroxyl content of the hydroxyl silicone oil is 4-12%; the water-based acrylic emulsion is water-based hydroxyl acrylic emulsion with the hydroxyl value of 1.2-1.8%;
the carbon dioxide copolymer polyol has the number average molecular weight of 1000-8000 g/mol, the hydroxyl functionality of 2-6 and the mole fraction of carbonate groups in molecules of 0.25-0.45.
2. The wood lacquer according to claim 1, wherein the aromatic diisocyanate is selected from one or more of toluene diisocyanate and diphenylmethane diisocyanate.
3. The wood lacquer according to claim 1, wherein the silicone-modified polyurethane emulsion is prepared by the following method:
mixing the carbon dioxide copolymer polyol, the hydroxyl silicone oil and the hydrophilic chain extender, adding the aromatic diisocyanate at the temperature of 30-60 ℃, and uniformly stirring;
stirring at 75-95 deg.C for 3-5 hr;
cooling to 50-75 ℃, adding the small molecular chain extender, and uniformly stirring;
cooling to 10-50 deg.C, adding the salt forming agent, and stirring;
and adding the solvent, and dispersing to obtain the organic silicon modified polyurethane emulsion.
4. The wood lacquer according to claim 1, wherein said additive comprises, in parts by weight: 0.1-0.5 part of defoaming agent, 0.1-0.5 part of bactericide, 0.2-1 part of wetting agent, 0.2-1 part of flatting agent, 0.1-0.8 part of pH regulator, 0.2-2 parts of film-forming assistant, 0.2-4 parts of thickening agent and 0-10 parts of color concentrate.
5. The wood lacquer according to claim 1, wherein the glass transition temperature of the aqueous acrylic emulsion is 40-45 ℃.
6. The wood lacquer according to claim 1, wherein the mass ratio of the salt forming agent to the hydrophilic chain extender is 1: (1.2-1.4).
7. The wood lacquer according to claim 1, wherein the hydrophilic chain extender is selected from one or more of N, N-dihydroxyethyl monomaleamic acid, dimethylolpropionic acid, dimethylolbutyric acid, N- (2-hydroxyethyl) -2-aminoethanesulfonic acid and N- (2-aminoethyl) -2-aminopropanesulfonic acid.
8. The wood lacquer according to claim 1, wherein the small molecule chain extender is selected from one or more of ethylene glycol, butylene glycol, diethylene glycol, dipropylene glycol, 1, 6-hexanediol, 1, 3-propanediol, 1, 2-propanediol, 1, 4-hydroxymethylcyclohexane, trimethylpentanediol, di-n-butylamine, ethylenediamine, trimethylhexanediamine, tetraethylenepentamine, diethylenetriamine and isophorone diamine.
9. The method for preparing the wood lacquer according to any one of claims 1 to 8, comprising the steps of:
preparing the organic silicon modified polyurethane emulsion;
and mixing the organic silicon modified polyurethane emulsion, the water-based acrylic emulsion and the additive with the water, and uniformly dispersing to obtain the wood lacquer.
10. Use of the wood lacquer according to any one of claims 1 to 8 for the preparation of wood furniture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629583.2A CN108948316B (en) | 2018-06-19 | 2018-06-19 | Organic silicon modified polyurethane emulsion, wood lacquer, preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629583.2A CN108948316B (en) | 2018-06-19 | 2018-06-19 | Organic silicon modified polyurethane emulsion, wood lacquer, preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108948316A CN108948316A (en) | 2018-12-07 |
| CN108948316B true CN108948316B (en) | 2021-03-30 |
Family
ID=64490708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810629583.2A Active CN108948316B (en) | 2018-06-19 | 2018-06-19 | Organic silicon modified polyurethane emulsion, wood lacquer, preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108948316B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613993A (en) * | 2013-11-21 | 2014-03-05 | 武汉大学 | Hydroxyl silicone oil modified waterborne UV (Ultraviolet) printing ink and preparation method thereof |
| CN105385334A (en) * | 2015-12-16 | 2016-03-09 | 江南大学 | Preparation method of two-component aqueous polyurethane transparent thermal conductive coating |
| CN106947377A (en) * | 2017-04-07 | 2017-07-14 | 广州冠志新材料科技有限公司 | A kind of aqueous woodware paint repaiies coloured light oil and its preparation method and application |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134387B (en) * | 2010-12-27 | 2013-07-31 | 山东省农业科学院中心实验室 | Method for reactive-organosilicon-modified aqueous polyurethane |
| TWI496794B (en) * | 2014-05-30 | 2015-08-21 | Champward Chemical Ind Co Ltd | Preparing method for aqueous emulsion via water dispersible polyurethane grafted acrylate copolymerization |
| CN105860005B (en) * | 2016-04-18 | 2019-01-08 | 广东工业大学 | A kind of aqueous polyurethane emulsion and preparation method thereof of low cost high rigidity |
| CN105885666B (en) * | 2016-04-18 | 2018-06-05 | 广东工业大学 | A kind of aqueous polyurethane emulsion of the high glued membrane hardness of color inhibition and preparation method thereof |
| CN106832882A (en) * | 2017-01-18 | 2017-06-13 | 广东达志环保科技股份有限公司 | A kind of enhanced water resistance, aqueous polyurethane emulsion of high adhesion force and preparation method thereof |
-
2018
- 2018-06-19 CN CN201810629583.2A patent/CN108948316B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613993A (en) * | 2013-11-21 | 2014-03-05 | 武汉大学 | Hydroxyl silicone oil modified waterborne UV (Ultraviolet) printing ink and preparation method thereof |
| CN105385334A (en) * | 2015-12-16 | 2016-03-09 | 江南大学 | Preparation method of two-component aqueous polyurethane transparent thermal conductive coating |
| CN106947377A (en) * | 2017-04-07 | 2017-07-14 | 广州冠志新材料科技有限公司 | A kind of aqueous woodware paint repaiies coloured light oil and its preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108948316A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3493796B2 (en) | Waterborne polyurethane resin paint | |
| CN104212330B (en) | A kind of preparation method of baking vanish type water-polyurethane/amido resin compounded emulsion | |
| CN107674173B (en) | Waterborne polyurethane crosslinking agent and preparation method thereof | |
| JP2013151645A (en) | Aqueous urethane resin composition | |
| CN110669419A (en) | Water-based acrylic polyurethane coating and preparation method thereof | |
| JPWO2009060838A1 (en) | Polyurethane for printing ink binder, its production method and printing ink | |
| CN108753139B (en) | Compound water-based paint and preparation method and application thereof | |
| CN112852273B (en) | Water-based matte scratch-resistant paint and application thereof | |
| CN108997554B (en) | Organosilicon modified polyurethane emulsion, paint, and preparation method and application thereof | |
| CN112812670A (en) | Bi-component PU coating and application thereof | |
| CN110885629A (en) | Tin-free catalysis of silane-functional polyurethane crosslinkers | |
| CN112646114A (en) | Triplecene derivative modified polyurethane aqueous resin and preparation method thereof | |
| KR101531569B1 (en) | Water-soluble paint composition and method for producing the same | |
| CN114736596B (en) | Quick-drying type single-component polyurethane waterproof coating and preparation method thereof | |
| CN114316173B (en) | Organosilicon modified hydroxyl polyacrylate dispersion and preparation method and application thereof | |
| CN108276884A (en) | Urethane composition and coating and polyolefine material and its surface treatment method | |
| CN108948316B (en) | Organic silicon modified polyurethane emulsion, wood lacquer, preparation method and application thereof | |
| CN112662282A (en) | Polyurethane modified epoxy coating and preparation method thereof | |
| KR20050069730A (en) | Method for preparing water dispersion polyurethane resin composition for coating of automotive plastic interior materials, and paint composition prepared using the same | |
| CN113956442B (en) | Preparation method of polyurethane modified nonionic aqueous amine epoxy resin curing agent | |
| CN108715727B (en) | Compound wood lacquer and preparation method and application thereof | |
| Vincent et al. | Waterborne polyurethane from polycaprolactone and tetramethylxylene diisocyanate: Synthesis by varying NCO/OH ratio and its characterization as wood coatings | |
| CN114933846A (en) | Non-isocyanate polyurethane coating and preparation method and application thereof | |
| WO1991015531A1 (en) | Urethane prepolymer and polyurethane composition | |
| CN110669196A (en) | Waterborne polyurethane and method for preparing transfer agent by using same and application of waterborne polyurethane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |