CN114456343A - Waterborne polyurethane bright gum resin and preparation method thereof - Google Patents
Waterborne polyurethane bright gum resin and preparation method thereof Download PDFInfo
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- CN114456343A CN114456343A CN202111617496.3A CN202111617496A CN114456343A CN 114456343 A CN114456343 A CN 114456343A CN 202111617496 A CN202111617496 A CN 202111617496A CN 114456343 A CN114456343 A CN 114456343A
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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
- C08G18/28—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
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6692—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/34
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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
- C08G18/28—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
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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
- C08G18/28—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
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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
- C08G18/28—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
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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
- C08G18/28—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
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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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
- C08G18/28—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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
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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
- C08G2170/00—Compositions for adhesives
Abstract
The invention discloses a waterborne polyurethane bright back adhesive resin which comprises the following components in parts by weight: carbon dioxide copolymer polyol: 100-200 parts; diisocyanate: 20-80 parts of a solvent; chain extension crosslinking agent: 1-20 parts; hydrophilic chain extender: 5-20 parts of an organic metal catalyst: 0.01-1 part; deionized water: 200-500 parts; salt forming agent: 5-20 parts. The invention also discloses a preparation method thereof, the reaction time is short, the reaction temperature is low, the reaction process is simple, the obtained waterborne polyurethane resin does not re-stick at normal temperature after being coated and dried, the adhesiveness is recovered at 120-140 ℃, and the waterborne polyurethane resin has the advantage of being stably stored at normal temperature; the waterborne polyurethane resin obtained by the invention has the advantages of good viscosity retention, high brightness, soft film forming and certain toughness; the waterborne polyurethane resin obtained by the invention has the characteristics of high solid content, low viscosity and good stability.
Description
Technical Field
The invention relates to a waterborne polyurethane bright back adhesive resin and a preparation method thereof.
Background
The water-based polyurethane adhesive is formed by dissolving or dispersing polyurethane in water, and has the advantages of no solvent, no pollution, good film forming property, strong bonding force, easy mixing with other polymers, particularly emulsion polymers, and the like, compared with a solvent type adhesive. And thus has become the main direction in which the coating industry is currently being developed.
The aqueous polyurethane resin uses water as a diluent and does not contain an organic solvent, so that the aqueous polyurethane resin does not contain toxic chemicals. The water-based product has non-flammable fire resistance, and effectively reduces the occurrence of fire. Has extremely high adhesive force with the substrate and higher surface glossiness. The waterborne polyurethane resin has the advantages of good environmental protection, no toxicity, no flammability and no explosion, and is extremely safe in storage and transportation. The ink takes water as a medium, is non-toxic and non-combustible, is pollution-free, non-dangerous, small in smell, free of environmental pollution, energy-saving, high in viscosity, good in flexibility and strong in bonding force to various types of paper, is suitable for a base material which is easy to be corroded by an organic solvent, can be mixed with various aqueous resins, is beneficial to improving performance and reducing cost, is suitable for dye ink, is an ideal product for promotion and advertisement and exhibition, is bright in printing effect and good in ink absorption, and is popular with customers.
However, the existing waterborne polyurethane adhesive has poor glossiness, and the using effect is influenced.
Disclosure of Invention
Aiming at the defects that the existing waterborne polyurethane adhesive has poor glossiness and influences the using effect, the invention provides the waterborne polyurethane glossy back adhesive resin.
The waterborne polyurethane bright back adhesive resin comprises the following components in parts by weight:
carbon dioxide copolymer polyol: 100-200 parts;
diisocyanate: 20-80 parts of a solvent;
chain extension crosslinking agent: 1-20 parts;
hydrophilic chain extender: 5-20 parts of a solvent;
organometallic catalysts: 0.01-1 part;
deionized water: 200-500 parts;
salt forming agent: 5-20 parts of a solvent;
solvent: 40-190 parts of a binder;
preferably, the salt forming agent is selected from one or more of triethylamine, dimethylethanolamine or diethanolamine.
Preferably, the hydrophilic chain extender is selected from one or more of dimethylolpropionic acid, dimethylolbutyric acid, sodium 1, 4-butanediol-2-sulfonate or sodium 1, 2-propanediol-3-sulfonate.
Preferably, the chain-extending crosslinking agent is selected from one or more of ethylene glycol, di-n-butylamine, ethylenediamine, dipropylene glycol, 1, 6-hexanediol, 1, 3-propanediol, 1, 2-propanediol, 1, 4-hydroxymethylcyclohexane, diethylene glycol or trimethylhexamethylenediamine.
Preferably, the molecular weight of the carbon dioxide copolymer polyol is 1000-3000 g/mol, and the hydroxyl functionality of the carbon dioxide copolymer polyol is 2-4;
preferably, the diisocyanate is one or more of hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, liquefied diphenylmethane diisocyanate, isophorone diisocyanate, toluene diisocyanate or hydrogenated diphenylmethane diisocyanate.
Preferably, the organometallic catalyst is selected from one or more of stannous isooctanoate, dibutyltin dilaurate, stannous octoate or organic bismuth.
Preferably, the solvent is selected from acetone.
Preferably, the waterborne polyurethane bright back adhesive resin emulsion is prepared from the following raw materials in parts by weight:
carbon dioxide copolymer polyol: 100 parts of (A);
diisocyanate: 50 parts of a mixture;
chain extension crosslinking agent: 12.6 parts;
hydrophilic chain extender: 8 parts of a mixture;
organometallic catalysts: 0.018 parts by weight;
deionized water: 300 parts of (A);
salt forming agent: 6 parts of (1);
solvent: 78 portions of
The salt forming agent is triethylamine;
the hydrophilic chain extender is dimethylolpropionic acid;
chain extension crosslinking agent: three parts of 1, 6-hexanediol and one part of trimethylolpropane;
the carbon dioxide copolymer polyol is polyester diol, the molecular weight is 1000g/mol, and the hydroxyl functionality of the carbon dioxide copolymer polyol is 2;
the diisocyanate is dicyclohexylmethane diisocyanate;
the organometallic catalyst is dibutyltin dilaurate;
the solvent being acetone
The preparation method of the waterborne polyurethane adhesive resin comprises the following steps:
4) adding 100-200 parts of carbon dioxide copolymer polyol into a reaction kettle, and dehydrating at 100 ℃ for 1h to obtain the anhydrous carbon dioxide copolymer polyol.
5) Adding anhydrous carbon dioxide copolymer polyol into a reaction kettle, heating to 70 ℃, then adding 10-20 parts of hydrophilic chain extender, 0.5-5 parts of chain extension cross-linking agent and 10-50 parts of solvent, then adding 20-80 parts of diisocyanate, and stirring for 10 min; 0.01-1 part of organic metal catalyst, raising the temperature to 80-85 ℃, stirring and reacting for 2 hours, then adding 1-10 parts of chain extension cross-linking agent and 20-100 parts of acetone, and stirring and reacting for 2 hours; and cooling to 60 ℃, adding 5-20 parts of salt forming agent and 10-40 parts of acetone, and stirring for 20 min. And then adding 200-400 parts of deionized water while stirring at a high speed, and stirring for 30 min. And finally, cooling to 50-55 ℃ and recovering the acetone in vacuum. And cooling to room temperature, and filtering with a 200-mesh filter screen to obtain the waterborne polyurethane bright gum resin.
According to the invention, the polyurethane emulsion with a relatively large molecular weight is polymerized by a special process, so that the film-forming adhesive has stronger viscosity, the film-forming hardness and the film-forming brightness are improved on the premise of ensuring the viscosity, and the formed film is soft and has certain toughness. Is suitable for the bright gum industry.
The invention has the following beneficial effects: after being coated and dried, the waterborne polyurethane resin obtained by the invention does not re-stick at normal temperature, recovers the adhesiveness at 120-140 ℃, and has the advantage of being stably stored at normal temperature; the waterborne polyurethane resin obtained by the invention has the advantages of good viscosity retention, high brightness, soft film forming and certain toughness; the waterborne polyurethane resin obtained by the invention has the characteristics of high solid content, low viscosity and good stability.
The invention aims to solve the technical problem of overcoming the defects that the conventional polyurethane back adhesive in the prior art is softer, has good stretchability and strong adhesive force, but a paint film is more adhesive at normal temperature, has low brightness and low toughness, and provides the waterborne polyurethane bright back adhesive resin and the preparation method thereof.
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) 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 8g of dimethylolpropionic acid, 1g of trimethylolpropane and 30g of acetone, adding 50g of diisocyanate, and stirring for 10 min. 0.018g of dibutyltin dilaurate was added, the temperature was raised to 85 ℃ and the reaction was carried out with stirring for 2 hours, then 3g of 1, 6-hexanediol and 38g of acetone were added and the reaction was carried out with stirring for 2 hours. The temperature is reduced to 60 ℃, 6g of triethylamine and 10g of acetone are added, and the mixture is stirred for 20 min. Then 300g of deionized water was added while stirring at high speed, and stirred for 30 min. And finally, cooling to 50-55 ℃ and recovering the acetone in vacuum. And cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain a waterborne polyurethane resin sample 1.
Example 2
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 8g of dimethylolpropionic acid, 1g of trimethylolpropane and 30g of acetone, adding 50g of diisocyanate, and stirring for 10 min. 0.018g of dibutyltin dilaurate was added, the temperature was raised to 85 ℃ and the reaction was carried out with stirring for 2 hours, then 3g of 1, 6-hexanediol and 38g of acetone were added and the reaction was carried out with stirring for 2 hours. The temperature is reduced to 60 ℃, 6g of triethylamine and 10g of acetone are added, and the mixture is stirred for 20 min. 485g of deionized water is added while stirring at high speed, and stirring is carried out for 30 min. And finally, cooling to 50-55 ℃ and recovering the acetone in vacuum. And cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain a water-based polyurethane resin sample 2.
Example 3
1) 100g of polytetrahydrofuran ether glycol with the molecular weight of 1000 is added into a reaction kettle and dehydrated for 1h at 100 ℃ to obtain the anhydrous polytetrahydrofuran ether glycol.
2) Adding anhydrous polytetrahydrofuran ether glycol into a reaction kettle, heating to 70 ℃, then adding 8g of dimethylolpropionic acid, 1g of trimethylolpropane and 30g of acetone, then adding 50g of diisocyanate, and stirring for 10 min. 0.018g of dibutyltin dilaurate was added, the temperature was raised to 85 ℃ and the reaction was carried out with stirring for 2 hours, then 3g of 1, 6-hexanediol and 38g of acetone were added and the reaction was carried out with stirring for 2 hours. The temperature is reduced to 60 ℃, 6g of triethylamine and 10g of acetone are added, and the mixture is stirred for 20 min. Then 300g of deionized water was added while stirring at high speed, and stirred for 30 min. And finally, cooling to 50-55 ℃ and recovering the acetone in vacuum. And cooling to room temperature, and filtering by using a 200-mesh filter screen to obtain a waterborne polyurethane resin sample 3.
The technical parameters of the aqueous polyurethane resin prepared in the above examples 1 to 3 were detected according to the following procedure:
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 sample is weighed and 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) Paint film adhesion detection of PET film aluminum-plated surface and PET film surface (3M adhesive tape test method)
Scraping samples on the aluminized surface and the thin film surface of the PET aluminized film by using a No. 1 RK wire rod, baking the samples in an oven at 130 ℃ for 30s, taking the dried samples out, placing the dried samples on a smooth and clean glass test bed, attaching a 18mm 3M transparent adhesive tape on the paint film, and then pressing the paint film by using a thumb; after placing for 30s, rapidly pulling up the adhesive tape with force; and judging the adhesion according to the falling and falling conditions of the paint film. The decision levels are as follows:
a is not pulled off, B is less than 1/3, C is 1/3-1/2, D is 1/2-2/3, E is 2/3-complete, and F is completely light and easy to pull off;
7) permanent adhesion of paint film
And scraping the aluminum plating surface of the PET aluminum plating transfer film by using a No. 1 RK wire rod, baking the PET aluminum plating transfer film in an oven at 130 ℃ for 30s, and taking out the PET aluminum plating transfer film after drying. And (3) attaching the coated surface to the synthetic leather surface, pressing and attaching the coated surface and the synthetic leather surface by using a pressing machine at the temperature of 120 ℃, under the pressure of 3kg for 3 seconds, and tearing off the transfer film. Standing for one week, sticking the synthetic leather to an aluminum surface by using a 3M transparent adhesive tape, and pressing by using a thumb; after placing for 30s, rapidly pulling up the adhesive tape with force; and observing whether the aluminum plating layer is stripped. )
8) 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.
9) Folding-resistant toughness of diaphragm
Pouring 10g of the emulsion sample into a culture dish with the diameter of 10 cm, putting the culture dish into an oven, drying the culture dish at the constant temperature of 65 ℃ for 24 hours, taking out the membrane, cooling the membrane to the room temperature, cutting the membrane into small pieces of 2x3cm, repeatedly bending the membrane, and recording the bending times when the membrane is broken. The molecular weight of the obtained polyurethane is 40000-80000.
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 (9)
1. The waterborne polyurethane glossy back adhesive resin is characterized by comprising the following components in parts by weight:
carbon dioxide copolymer polyol: 100-200 parts;
diisocyanate: 20-80 parts of a solvent;
chain extension crosslinking agent: 1-20 parts;
hydrophilic chain extender: 5-20 parts of a solvent;
organometallic catalysts: 0.01-1 part;
deionized water: 200-500 parts;
salt forming agent: 5-20 parts of a solvent;
solvent: 40-190 parts.
2. The waterborne polyurethane glossy back gum resin of claim 1, wherein the salt forming agent is one or more selected from triethylamine, dimethylethanolamine or diethanolamine.
3. The waterborne polyurethane glossy back adhesive resin of claim 1, wherein the hydrophilic chain extender is one or more selected from dimethylolpropionic acid, dimethylolbutyric acid, sodium 1, 4-butanediol-2-sulfonate and sodium 1, 2-propanediol-3-sulfonate.
4. The waterborne polyurethane glossy back gum resin of claim 1, wherein the chain-extending crosslinking agent is one or more selected from the group consisting of ethylene glycol, di-n-butylamine, ethylenediamine, dipropylene glycol, 1, 6-hexanediol, 1, 3-propanediol, 1, 2-propanediol, 1, 4-hydroxymethylcyclohexane, diethylene glycol, and trimethylhexamethylenediamine.
5. The waterborne polyurethane glossy back adhesive resin of claim 1, wherein the molecular weight of the carbon dioxide copolymer polyol is 1000-3000 g/mol, and the hydroxyl functionality is 2-4.
6. The waterborne polyurethane glossy back gum resin of claim 1, wherein the diisocyanate is one or more of hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, liquefied diphenylmethane diisocyanate, isophorone diisocyanate, toluene diisocyanate, or hydrogenated diphenylmethane diisocyanate.
7. The waterborne polyurethane glossy back gum resin of claim 1, wherein the organometallic catalyst is selected from one or more of stannous isooctanoate, dibutyltin dilaurate, stannous octoate, or organic bismuth.
8. The waterborne polyurethane glossy back adhesive resin of claim 1, which comprises the following components in parts by weight:
carbon dioxide copolymer polyol: 100 parts of (A);
diisocyanate: 50 parts of a mixture;
chain extension crosslinking agent: 12.6 parts;
and (3) hydrophilic chain extender: 8 parts of a mixture;
organometallic catalysts: 0.018 parts by weight;
deionized water: 300 parts of (A);
salt forming agent: 6 parts of (1);
the salt forming agent is triethylamine;
the hydrophilic chain extender is dimethylolpropionic acid;
the chain extension crosslinking agent is: three parts of 1, 6-hexanediol and one part of trimethylolpropane;
the carbon dioxide copolymer polyol is polyester diol, the molecular weight is 1000g/mol, and the hydroxyl functionality of the carbon dioxide copolymer polyol is 2;
the diisocyanate is dicyclohexylmethane diisocyanate;
the organometallic catalyst is dibutyltin dilaurate.
The solvent is acetone.
9. The method of preparing an aqueous polyurethane adhesive resin of claim 1, comprising the steps of:
1) adding 100-200 parts of carbon dioxide copolymer polyol into a reaction kettle, and dehydrating to obtain anhydrous carbon dioxide copolymer polyol;
2) adding anhydrous carbon dioxide copolymer polyol into a reaction kettle, heating to 70 ℃, then adding 10-20 parts of hydrophilic chain extender, 0.5-5 parts of chain extension cross-linking agent and 10-50 parts of acetone, then adding 20-80 parts of diisocyanate, and stirring; 0.01-1 part of organic metal catalyst, raising the temperature to 80-85 ℃, stirring and reacting for 2 hours, then adding 1-10 parts of chain extension cross-linking agent and 20-100 parts of acetone, and stirring and reacting for 2 hours; cooling to 60 ℃, adding 5-20 parts of salt forming agent and 10-40 parts of acetone, and stirring for 20 min; then, adding 200-400 parts of deionized water while stirring at a high speed, and stirring for 30 min;
3) and cooling to 50-55 ℃, recovering acetone in vacuum, cooling to room temperature, and filtering with a 200-mesh filter screen to obtain the waterborne polyurethane bright back adhesive resin.
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| 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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2021
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| 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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