CN114437308A - Waterborne polyurethane gloss oil resin and preparation method thereof - Google Patents
Waterborne polyurethane gloss oil resin and preparation method thereof Download PDFInfo
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- CN114437308A CN114437308A CN202111617479.XA CN202111617479A CN114437308A CN 114437308 A CN114437308 A CN 114437308A CN 202111617479 A CN202111617479 A CN 202111617479A CN 114437308 A CN114437308 A CN 114437308A
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- 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
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- 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
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- 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
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
-
- 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
- C08G18/65—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
- 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
- C09D175/06—Polyurethanes from polyesters
Abstract
The invention discloses a waterborne polyurethane gloss oil resin which comprises the following components in parts by weight: carbon dioxide copolymer polyol: 200-400 parts of diisocyanate: 100-300 parts; chain extension crosslinking agent: 5-30 parts of a solvent; hydrophilic chain extender: 10-30 parts; organometallic catalysts: 0.01-1 part; deionized water: 400-700 parts of a binder; salt forming agent: 10-30 parts; solvent: 61-160 parts. According to the invention, more low molecular weight dihydric alcohol is introduced in the prepolymerization stage, so that the emulsion after film formation shows higher hardness and high gloss. The reaction time is short, the reaction temperature is low, the reaction process is simple, and the obtained waterborne polyurethane resin has the characteristics of excellent adhesive force after being coated on a PET film and dried, no back adhesion at normal temperature, good scratch resistance, high hardness, high brightness, high fullness, certain toughness of a formed film, high solid content, low viscosity and good stability.
Description
Technical Field
The invention relates to an aqueous polyurethane gloss oil resin and a preparation method thereof.
Background
Compared with the traditional solvent-based coating, the water-based coating has the advantages of low price, safe use, resource and energy conservation, environmental pollution and public nuisance reduction, and the like, thereby becoming the main direction for developing the coating industry at present. After the water-based polyurethane gloss oil resin is formed into a film, the glossiness is high, the transparency is good, the friction resistance and the bending resistance are good, the heat resistance is good, the sealing performance is good, the dry rubbing resistance is high, the formed film is soft and does not become hard, and the like. Low smell, energy saving and environmental protection.
At present, the domestic synthetic process of the waterborne polyurethane gloss oil resin is less, and most factories depend on imported resin. Most of the traditional polyurethane resin is soft, and a certain film-forming toughness and a certain scratch resistance are required in the gloss oil industry. The water-based polyurethane gloss oil resin has the characteristics of good scratch resistance, good wear resistance, excellent brightening capability, permeable paint film and the like, has a certain waterproof capability, is widely applied to top-layer extinction scratch-resistant coatings of various papers, gold and silver cards and leather, can replace a film laminating process to realize plasticization, has excellent folding crack resistance and wear resistance and water resistance after being coated on paper product packages, and can be coated on line or off line.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of low hardness and general glossiness of a paint film of conventional polyurethane in the prior art, such as softness, good stretchability, and the like, and provides a waterborne polyurethane gloss oil resin and a preparation method thereof.
In order to solve the technical problems, the invention provides the following technical scheme:
the waterborne polyurethane gloss oil resin comprises the following components in parts by weight:
carbon dioxide copolymer polyol: 200-400 parts;
diisocyanate: 100-300 parts;
chain extension crosslinking agent: 5-30 parts of a solvent;
hydrophilic chain extender: 10-30 parts;
organometallic catalysts: 0.01-1 part;
deionized water: 400-700 parts of a binder;
salt forming agent: 10-30 parts;
solvent: 61-160 parts;
preferably, the salt forming agent is selected from one or more of diethanolamine, triethylamine or dimethylethanolamine.
Preferably, the hydrophilic chain extender is selected from one or more of 1, 4-butanediol-2-sodium sulfonate, dimethylolpropionic acid, dimethylolbutyric acid or 1, 2-propanediol-3-sodium sulfonate.
Preferably, the chain-extending crosslinking agent is selected from one or more of diethylene glycol, dipropylene glycol, ethylene glycol, butanediol, 1, 6-hexanediol, 1, 3-propanediol, di-n-butylamine, ethylenediamine, 1, 2-propanediol, 1, 4-hydroxymethylcyclohexane, trimethylhexamethylenediamine or tetraethylenepentamine.
Preferably, the molecular weight of the carbon dioxide copolymer polyol is 1000-4000 g/mol, and the hydroxyl functionality of the carbon dioxide copolymer polyol is 2-4;
preferably, the diisocyanate is selected from one or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, liquefied diphenylmethane diisocyanate, hexamethylene diisocyanate and hydrogenated diphenylmethane diisocyanate.
Preferably, the solvent is selected from one or more of dimethylacetamide, N-methylpyrrolidone and acetone.
Preferably, the organometallic catalyst is selected from one or more of stannous isooctanoate, stannous octoate, dibutyltin dilaurate and organic bismuth.
The preparation method of the waterborne polyurethane adhesive resin comprises the following steps:
3) adding 200-400 parts of carbon dioxide copolymer polyol into a reaction kettle, and dehydrating at 100 ℃ for 1h to obtain anhydrous carbon dioxide copolymer polyol;
4) adding anhydrous carbon dioxide copolymer polyol into a reaction kettle, heating to 70 ℃, then adding 5-30 parts of chain extension crosslinking agent and 10-50 parts of solvent, stirring for 10min, then adding 100-200 parts of diisocyanate, and stirring for 10 min; and then adding 0.01-1 part of organic metal catalyst, raising the temperature to 80-85 ℃, stirring and reacting for 10min, then adding 1-10 parts of chain extension crosslinking agent, 10-30 parts of hydrophilic chain extension crosslinking agent and 50-100 parts of solvent, and stirring and reacting for 3 h. And cooling to 70 ℃, adding 10-30 parts of a salt forming agent and 1-10 parts of a solvent, stirring for 10min, then adding 400-700 parts of deionized water while stirring at a high speed, and stirring for 30 min. And finally, cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain the waterborne polyurethane gloss oil resin.
Preferably, the emulsion of the present invention comprises the following components in parts by weight:
carbon dioxide copolymer polyol: 200 parts of (A);
diisocyanate: 130 parts of (1);
chain extension crosslinking agent: 14 parts of (1);
hydrophilic chain extender: 20 parts of (1);
organometallic catalysts: 0.01 part;
deionized water: 550 parts of a mixture;
salt forming agent: 15 parts of (1);
solvent: 65 parts of (1);
wherein the salt forming agent is triethylamine hydrophilic chain extender is dimethylolpropionic acid; the chain extension crosslinking agent is ethylene glycol; the carbon dioxide copolymer polyol is a polyester diol; the molecular weight of the carbon dioxide copolymer polyol is 2000g/mol, and the hydroxyl functionality is 2; the diisocyanate is diphenylmethane diisocyanate; the organometallic catalyst is dibutyltin dilaurate; the solvent is dimethylacetamide.
The invention has the following beneficial effects:
according to the invention, more low molecular weight dihydric alcohol is introduced in the prepolymerization stage, so that the emulsion after film formation shows higher hardness and high gloss. The obtained waterborne polyurethane resin has the characteristics of excellent adhesive force after being coated on a PET film and dried, no adhesive reversion at normal temperature, good scratch resistance, high hardness, high brightness, high fullness, certain toughness of a formed film, high solid content, low viscosity and good stability.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
1) 200g of poly adipic acid-1, 4-butanediol diol with molecular weight of 2000 is added into a reaction kettle, and the mixture is dehydrated for 1h at 100 ℃ to obtain the anhydrous poly adipic acid-1, 4-butanediol diol.
2) Adding anhydrous poly adipic acid-1, 4-butanediol ester diol into a reaction kettle, heating to 70 ℃, adding 2g of ethylene glycol and 30g of dimethylacetamide, stirring at 500rpm for 10min, adding 130g of diphenylmethane diisocyanate, and stirring at 500rpm for 10min. Then, 0.01g of dibutyltin dilaurate was added, the temperature was raised to 85 ℃ and the reaction was carried out with stirring for 10min, and then, 2g of ethylene glycol, 20g of dimethylolpropionic acid and 30g of dimethylacetamide were added and the reaction was carried out with stirring for 3 hours. The temperature is reduced to 70 ℃, 15g of triethylamine and 5g of dimethylacetamide are added, and stirring is carried out for 10min. Then 550g of deionized water was added while stirring at high speed, and stirred for 30 min. And finally, cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain the waterborne polyurethane gloss oil resin sample 1.
Example 2
1) 100g of poly adipic acid-1, 4-butanediol diol with molecular weight of 1000 is added into a reaction kettle and dehydrated for 1h at 100 ℃ to obtain the anhydrous poly adipic acid-1, 4-butanediol diol.
2) Adding anhydrous poly adipic acid-1, 4-butanediol ester diol into a reaction kettle, heating to 70 ℃, adding 2g of ethylene glycol and 30g of dimethylacetamide, stirring at 500rpm for 10min, adding 130g of diphenylmethane diisocyanate, and stirring at 500rpm for 10min. Then, 0.01g of dibutyltin dilaurate was added, the temperature was raised to 85 ℃ and the reaction was carried out with stirring for 10min, and then, 2g of ethylene glycol, 20g of dimethylolpropionic acid and 30g of dimethylacetamide were added and the reaction was carried out with stirring for 3 hours. The temperature is reduced to 70 ℃, 15g of triethylamine and 5g of dimethylacetamide are added, and stirring is carried out for 10min. Then 370g of deionized water was added while stirring at high speed, and the mixture was stirred for 30 min. And finally, cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain the waterborne polyurethane gloss oil resin sample 2.
Example 3
1) 200g of polycaprolactone diol with molecular weight of 2000 is added into a reaction kettle, and the reaction kettle is dehydrated for 1 hour at 100 ℃ to obtain the anhydrous polycaprolactone diol.
2) Adding anhydrous polycaprolactone diol into a reaction kettle, heating to 70 ℃, then adding 2g of ethylene glycol and 30g of dimethylacetamide, stirring at 500rpm for 10min, then adding 130g of diphenylmethane diisocyanate, and stirring at 500rpm for 10min. Then, 0.01g of dibutyltin dilaurate was added, the temperature was raised to 85 ℃ and the reaction was carried out with stirring for 10min, and then, 2g of ethylene glycol, 20g of dimethylolpropionic acid and 30g of dimethylacetamide were added and the reaction was carried out with stirring for 3 hours. The temperature is reduced to 70 ℃, 15g of triethylamine and 5g of dimethylacetamide are added, and stirring is carried out for 10min. Then 550g of deionized water was added while stirring at high speed, and stirred for 30 min. And finally, cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain the waterborne polyurethane gloss oil resin sample 3.
The technical parameters of the aqueous acrylic resin prepared in the above examples 1 to 3 were detected according to the following procedures:
1) appearance inspection (eye detection method)
The emulsion sample was poured into a colorimetric cylinder, and the color, shape, transparency, and the like of the emulsion were observed visually under sufficient natural light conditions.
2) Viscosity testing (NDJ-1 rotational viscometer)
The viscosity was measured with an NDJ-1 rotational viscometer.
3) Solid content detection (oven baking method)
Weighing the tinfoil cup by mass M1; the temperature of the oven is raised to 130 ℃, the mass M of the weighed sample is put into a small tin foil cup, and the small tin foil cup is carefully put into a constant-temperature oven; after baking for 1 hour, the sample was taken out and placed in a desiccator, and the mass M2 was measured after cooling to room temperature.
The solid content is calculated according to the following formula: x ═ M2-M1)/M × 100%.
4) pH value detection
General method for determining pH value in GB/T23769-2009 aqueous solution
5) Gloss and transparency test of paint film (visual test method)
Scraping a sample on the aluminum plating surface of the PET aluminum plating film by using a No. 1 RK wire rod, baking for 30s in an oven at 130 ℃, taking out after drying, cooling to room temperature, and observing the glossiness of a paint film of the sample by using a glossiness instrument under the condition of sufficient natural light. The transparency of the paint film was observed visually.
6) Scratch and abrasion resistance test of paint film (test of ink printing decoloration tester)
Scraping the emulsion on an aluminum foil by using a No. 1 RK (potassium permanganate) wire rod, baking the emulsion in an oven at the temperature of 130 ℃ for 30s, taking out the emulsion after drying, and testing by using an ink printing and decoloring tester at the pressure of 4 pounds and the speed of 43 times/minute and the friction times of 30 times; the coating was observed for wear.
7) Hardness of paint film
The emulsion was scraped on aluminum foil with a # 2 RK wire rod, oven-dried at 130 ℃ for 30s and then taken out, and the hardness was measured using a film coating hardness pencil.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The waterborne polyurethane gloss oil resin is characterized by comprising the following components in parts by weight:
carbon dioxide copolymer polyol: 200-400 parts;
diisocyanate: 100-300 parts;
chain extension crosslinking agent: 5-30 parts of a solvent;
hydrophilic chain extender: 10-30 parts;
organometallic catalysts: 0.01-1 part;
deionized water: 400-700 parts of a binder;
salt forming agent: 10-30 parts;
solvent: 61-160 parts.
2. The aqueous polyurethane gloss oil resin of claim 1, wherein the salt forming agent is one or more selected from diethanolamine, triethylamine and dimethylethanolamine.
3. The aqueous polyurethane varnish resin of claim 1, wherein the hydrophilic chain extender is one or more selected from the group consisting of sodium 1, 4-butanediol-2-sulfonate, dimethylolpropionic acid, dimethylolbutyric acid and sodium 1, 2-propanediol-3-sulfonate.
4. The aqueous polyurethane varnish resin of claim 1, wherein the chain-extending cross-linking agent is one or more selected from the group consisting of diethylene glycol, dipropylene glycol, ethylene glycol, butylene glycol, 1, 6-hexanediol, 1, 3-propanediol, di-n-butylamine, ethylenediamine, 1, 2-propanediol, 1, 4-hydroxymethylcyclohexane, trimethylhexamethylenediamine, and tetraethylenepentamine.
5. The aqueous polyurethane varnish resin of claim 1, wherein the carbon dioxide copolymer polyol has a molecular weight of 1000 to 4000g/mol and a hydroxyl functionality of 2 to 4.
6. The aqueous polyurethane varnish resin of claim 1, wherein the diisocyanate is selected from one or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, liquefied diphenylmethane diisocyanate, hexamethylene diisocyanate, and hydrogenated diphenylmethane diisocyanate.
7. The aqueous polyurethane gloss oil resin according to claim 1, wherein the solvent is one or more selected from the group consisting of dimethylacetamide, N-methylpyrrolidone, and acetone.
8. The aqueous polyurethane gloss oil resin of claim 1, wherein the organometallic catalyst is selected from one or more of stannous isooctanoate, stannous octoate, dibutyltin dilaurate, and organic bismuth.
9. The aqueous polyurethane varnish resin of claim 1, wherein the aqueous polyurethane varnish resin comprises the following components in parts by weight:
carbon dioxide copolymer polyol: 200 parts of (a);
diisocyanate: 130 parts of (1);
chain extension crosslinking agent: 14 parts of (1);
hydrophilic chain extender: 20 parts of (1);
organometallic catalysts: 0.01 part;
deionized water: 550 parts of a mixture;
salt forming agent: 15 parts of (1);
solvent: 65 parts of (1);
wherein the salt forming agent is triethylamine hydrophilic chain extender is dimethylolpropionic acid; the chain extension crosslinking agent is ethylene glycol; the carbon dioxide copolymer polyol is a polyester diol; the molecular weight of the carbon dioxide copolymer polyol is 2000g/mol, and the hydroxyl functionality is 2; the diisocyanate is diphenylmethane diisocyanate; the organometallic catalyst is dibutyltin dilaurate; the solvent is dimethylacetamide.
10. The preparation method of the aqueous polyurethane gloss oil resin of claim 1, which is characterized by comprising the following steps:
1) adding 200-400 parts of carbon dioxide copolymer polyol into a reaction kettle, and dehydrating at 100 ℃ for 1h to obtain anhydrous carbon dioxide copolymer polyol;
2) adding anhydrous carbon dioxide copolymer polyol into a reaction kettle, heating to 70 ℃, then adding 5-30 parts of chain extension crosslinking agent and 10-50 parts of solvent, stirring for 10min, then adding 100-200 parts of diisocyanate, and stirring for 10 min; then adding 0.01-1 part of organic metal catalyst, raising the temperature to 80-85 ℃, stirring and reacting for 10min, then adding 1-10 parts of chain extension crosslinking agent, 10-30 parts of hydrophilic chain extension crosslinking agent and 50-100 parts of solvent, and stirring and reacting for 3 h; cooling to 70 ℃, adding 10-30 parts of a salt forming agent and 1-10 parts of a solvent, stirring for 10min, then adding 400-700 parts of deionized water while stirring at a high speed, and stirring for 30 min; and finally, cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain the waterborne polyurethane gloss oil resin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111617479.XA CN114437308A (en) | 2021-12-27 | 2021-12-27 | Waterborne polyurethane gloss oil resin and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111617479.XA CN114437308A (en) | 2021-12-27 | 2021-12-27 | Waterborne polyurethane gloss oil resin and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105801810A (en) * | 2016-05-18 | 2016-07-27 | 长春工业大学 | Preparation method of high-glossiness high-water-permeability polyurethane resin |
| CN105885666A (en) * | 2016-04-18 | 2016-08-24 | 广东工业大学 | Anti-yellowing waterborne polyurethane emulsion with high glue film hardness and preparation method of anti-yellowing waterborne polyurethane emulsion |
| CN106674475A (en) * | 2017-01-17 | 2017-05-17 | 广东工业大学 | Polyurethane aqueous material and preparation method and application thereof |
-
2021
- 2021-12-27 CN CN202111617479.XA patent/CN114437308A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105885666A (en) * | 2016-04-18 | 2016-08-24 | 广东工业大学 | Anti-yellowing waterborne polyurethane emulsion with high glue film hardness and preparation method of anti-yellowing waterborne polyurethane emulsion |
| CN105801810A (en) * | 2016-05-18 | 2016-07-27 | 长春工业大学 | Preparation method of high-glossiness high-water-permeability polyurethane resin |
| CN106674475A (en) * | 2017-01-17 | 2017-05-17 | 广东工业大学 | Polyurethane aqueous material and preparation method and application thereof |
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Application publication date: 20220506 |