CN111074654A - Color-fixing wax-feeling leather surface layer polishing treatment agent and preparation method thereof - Google Patents
Color-fixing wax-feeling leather surface layer polishing treatment agent and preparation method thereof Download PDFInfo
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- CN111074654A CN111074654A CN201911368253.3A CN201911368253A CN111074654A CN 111074654 A CN111074654 A CN 111074654A CN 201911368253 A CN201911368253 A CN 201911368253A CN 111074654 A CN111074654 A CN 111074654A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
- D06P1/5285—Polyurethanes; Polyurea; Polyguanides
-
- 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
-
- 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
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
-
- 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
- C08G18/4283—Hydroxycarboxylic acid or ester
-
- 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
-
- 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
- C08G18/6603—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6607—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/16—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using dispersed, e.g. acetate, dyestuffs
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67383—Inorganic compounds containing silicon
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides a color-fixing wax-feeling leather surface polishing treatment agent, which comprises the following components: the coating comprises water-based PU, a wetting agent, silicon dioxide matting powder, a dispersing agent, a wax feeling agent, a thickening agent and water. Wherein the aqueous PU is prepared by the following steps: pre-polymerization reaction is carried out on the highly branched polyhydroxy-carboxylic acid polymer and polyisocyanate to obtain a prepolymer; adding polyol into the prepolymer, and polymerizing again; adding a hydrophilic chain extender, a dye and a solvent for chain extension, measuring the content of NCO after reaction, and then cooling; adding acetone to reduce the viscosity of the system and reduce the temperature, adding deionized water for dispersion under high-speed shearing, and removing the acetone in the system under reduced pressure to obtain the aqueous PU. The color fastness grade of the treating agent is high.
Description
Technical Field
The invention relates to a color-fixing wax-feeling leather surface polishing treatment agent. The invention also relates to a preparation method of the color-fixing wax-feeling leather surface polishing treatment agent.
Background
Synthetic leather is a plastic article that mimics the composition and structure of natural leather (see leather) and serves as a substitute material therefor. Synthetic leather typically uses a dye-containing treatment to impart a desired color. The dye can be inorganic dye and organic dye, and the organic dye can be divided into organic micromolecular dye and dye. General small molecule dyes are fixed on a polyurethane matrix through ionic bonds, hydrogen bonds and the like, however, the binding force between the dyes and the matrix is weak, small molecules are easy to migrate to the surface of a material during use, and the dyeing fastness is poor. The dye needs to react active hydrogen in the dye with isocyanate groups, and dye molecules are connected into a polyurethane matrix to realize the color fixing effect. However, problems also arise when using such dyes. When the molecular weight of the aqueous polyurethane dye is smaller, the number of polar groups on a molecular chain is smaller, so that the dyeing firmness is poorer, and when the molecular weight of the aqueous polyurethane dye is larger, the hand feeling effect of a dyed object is reduced. Accordingly, there is a need to provide a polyurethane dye treatment that is more readily available and has high color fastness.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a color-fixing wax-feeling leather surface layer polishing treatment agent and a preparation method thereof. The treating agent enables the waterborne polyurethane to be dyed more easily and remarkably improves the dyeing fastness.
According to an aspect of the present invention, there is provided a fixed waxy feel leather surface finish treatment comprising the following components:
the water-based PU is prepared from the following steps of:
pre-polymerization reaction is carried out on the highly branched polyhydroxy-carboxylic acid polymer and polyisocyanate to obtain a prepolymer;
adding polyol into the prepolymer, and polymerizing again;
adding a hydrophilic chain extender, a dye and a solvent for chain extension, measuring the content of NCO after reaction, and cooling after reaching an ideal value;
adding acetone to reduce the viscosity of the system and reduce the temperature, adding deionized water for dispersion under high-speed shearing, and removing the acetone in the system under reduced pressure to obtain the aqueous PU.
According to one embodiment of the invention, the color-fixing waxy-feeling leather surface layer polishing treatment agent comprises the following components in parts by weight: 40-60 parts of water-based PU, 1-3 parts of wetting agent, 5-8 parts of silicon dioxide matting powder, 5-10 parts of dispersing agent, 5-10 parts of wax feeling hand feeling agent, 5-8 parts of thickening agent and 30-50 parts of water.
According to one embodiment of the invention, the highly branched polyhydroxy-carboxylic acid polymer is self-polymerized from dimethylolpropionic acid.
According to one embodiment of the present invention, the R value of the polyisocyanate and polyhydroxy-carboxylic acid polymer is about 2. The R value of the polyisocyanate with the polyol was 1.5.
According to one embodiment of the present invention, the polyisocyanate includes one or both of toluene diisocyanate and isophorone diisocyanate.
According to one embodiment of the invention, the polyol comprises one or more of a polypropylene glycol polyether polyol and a polytetrahydrofuran ether glycol having a molecular weight between that of the polypropylene glycol polyether polyol and the polytetrahydrofuran ether glycol.
According to one embodiment of the invention, the dye is selected from at least one of disperse red 91, disperse blue 14, solvent red L-B, basic red 2. The amount of dye used is determined according to the dyeing requirements and the type of dye selected.
According to another aspect of the present invention, there is provided a method for preparing the above fixed waxy-feel leather surface finish treatment, comprising the steps of: (1) preparing an aqueous PU comprising: pre-polymerization reaction is carried out on the highly branched polyhydroxy-carboxylic acid polymer and polyisocyanate to obtain a prepolymer; adding polyol into the prepolymer, and polymerizing again; adding a hydrophilic chain extender, a dye and a solvent for chain extension, measuring the content of NCO after reaction, and then cooling; adding acetone to reduce the viscosity of the system and reduce the temperature, adding deionized water for dispersion under high-speed shearing, and removing the acetone in the system under reduced pressure to obtain aqueous PU; (2) mixing and stirring aqueous PU, a wetting agent, silicon dioxide matting powder, a dispersing agent, a wax feeling agent, a thickening agent and water.
According to one embodiment of the present invention, the reaction temperature for the prepolymerization reaction of the polyhydroxy-carboxylic acid polymer with the polyisocyanate is 60 to 70 ℃ and the reaction time is 10 to 30 minutes.
According to one embodiment of the present invention, the polymerization temperature of the prepolymer and the polyol is 70 to 100 ℃ and the reaction time is 1 to 3 hours.
The color-fixing wax-feeling leather surface polishing treatment agent and the preparation method thereof disclosed by the invention can obtain the following beneficial effects: when the aqueous PU is prepared, firstly, polyisocyanate and the highly branched polyhydroxy-carboxylic acid polymer are subjected to prepolymerization reaction, and the introduction of the highly branched polyhydroxy-carboxylic acid polymer generates a part of loose structure, so that dye molecules can penetrate into the polymer conveniently. Moreover, the highly branched structure contains a large number of end groups, which is more beneficial to forming chemical bonds with dye molecules or generating adsorption effect on the dye molecules, thereby improving the dyeing firmness.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Preparing water-based PU:
three different aqueous PU's, respectively designated PU0.25, PU0.45 and PU0.65, were prepared by reacting a polyester prepared by polymerization of dimethylolpropionic acid as a polyhydroxy-carboxylic acid polymer with a polyester having a degree of branching of 0.25, 0.45 and 0.65.
The preparation of aqueous PU is described below:
the polyester with the branching degree of 0.25, 0.45 and 0.65 is respectively used for carrying out prepolymerization reaction with toluene diisocyanate, wherein the R value is set to be 1.5, the temperature is set to be 60 ℃, and the reaction time is 30 minutes.
Adding polypropylene glycol polyether glycol with molecular weight of 800 into the prepolymer. The R value of the initial toluene diisocyanate and polypropylene glycol polyether polyol was set to 1.5. The temperature was raised to 70 ℃ to conduct polymerization again for 3 hours. 1, 4-butanediol, disperse Red 91 and N-methylpyrrolidone were then added for chain extension, the amount of dye used being 15% by weight of the polyurethane synthesized. After the reaction, the NCO content is determined, and the temperature is reduced to 60 ℃ after the theoretical value meets the requirement.
Adding acetone into the reaction system to reduce the viscosity of the system, cooling to 40 ℃, adding deionized water under high-speed shearing for dispersing, and finally removing the acetone in the system under reduced pressure to obtain aqueous PU0.25, PU0.45 and PU 0.65.
Example 2
Weighing the following substances in parts by weight: 40 parts by weight of aqueous PU0.25, 1 part by weight of wetting agent, 5 parts by weight of silicon dioxide matting powder, 5 parts by weight of dispersing agent, 5 parts by weight of wax feeling agent, 5 parts by weight of thickening agent and 30 parts by weight of water.
And mixing and stirring the mixture uniformly to obtain the color-fixing wax-feeling leather surface polishing treatment agent 1.
Example 3
Weighing the following substances in parts by weight: 40 parts by weight of aqueous PU0.45, 1 part by weight of wetting agent, 5 parts by weight of silicon dioxide matting powder, 5 parts by weight of dispersing agent, 5 parts by weight of wax feeling agent, 5 parts by weight of thickening agent and 30 parts by weight of water.
And mixing and stirring the mixture uniformly to obtain the color-fixing wax-feeling leather surface polishing treatment agent 2.
Example 4
Weighing the following substances in parts by weight: 40 parts by weight of aqueous PU0.65, 1 part by weight of wetting agent, 5 parts by weight of silicon dioxide matting powder, 5 parts by weight of dispersing agent, 5 parts by weight of wax feeling agent, 5 parts by weight of thickening agent and 30 parts by weight of water.
And mixing and stirring the mixture uniformly to obtain the color-fixing wax-feeling leather surface polishing treatment agent 3.
Example 5
Weighing the following substances in parts by weight: 50 parts by weight of aqueous PU0.45, 2 parts by weight of wetting agent, 6 parts by weight of silicon dioxide matting powder, 7 parts by weight of dispersing agent, 8 parts by weight of wax feeling agent, 6 parts by weight of thickening agent and 40 parts by weight of water.
And mixing and stirring the mixture uniformly to obtain the color-fixing wax-feeling leather surface polishing treatment agent 2-2.
Example 6
Weighing the following substances in parts by weight: 60 parts by weight of aqueous PU0.45, 3 parts by weight of wetting agent, 8 parts by weight of silicon dioxide matting powder, 10 parts by weight of dispersing agent, 10 parts by weight of wax feeling agent, 8 parts by weight of thickening agent and 50 parts by weight of water.
And mixing and stirring the mixture uniformly to obtain the color-fixing wax-feeling leather surface polishing treatment agent 2-3.
The methods of heating and cooling used in the above preparation process are all conventional methods in the art.
The theoretical NCO (nitrogen carbon oxygen) value of example 1 is generally N (NCO)/n (OH) and is about 0.94 to 1.06.
The color-fixing waxy-feeling leather surface layer polishing treatment agent prepared according to the embodiment is prepared into an adhesive film, the adhesive film is fixed on a rubbing color fastness instrument, and a rubbing head coated with white cloth is adopted to perform a dry rubbing test on the adhesive film at a constant pressure of 9N. The speed of rubbing was 60 times/min, and the number of rubbing was 10 times. After the completion, the white cloth on the rubbing head is taken down, and the white cloth is compared with a staining card according to GB/T251-.
And in addition, carrying out wet rubbing color fastness test on the adhesive film. Wetting the white cloth to ensure that the water absorption rate of the white cloth is between 95 and 105 percent, wrapping the wet white cloth on a friction head, and carrying out a dry friction test on the adhesive film at a constant pressure of 9N. The speed of rubbing was 60 times/min, and the number of rubbing was 10 times. After the completion, the white cloth on the rubbing head is taken down, and the white cloth is compared with a staining card according to GB/T251-.
The technical performance indexes of the color-fixing wax-feeling leather surface polishing treatment agent prepared in the above embodiments are shown in table 1:
TABLE 1
The test results show that the color-fixing wax-feeling leather surface polishing treatment agent prepared by the preparation method has excellent friction firmness and can reach higher dry and wet friction resistance level.
If the dye in example 1 is replaced by disperse blue 14, solvent red L-B or basic red 2, and other conditions are not changed, the color-fixing wax-feeling leather surface polishing treatment agent with high color fastness can be obtained.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present 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.
Claims (10)
1. The color-fixing wax-feeling leather surface polishing treatment agent is characterized by comprising the following components:
the water-based PU is prepared from the following steps of:
pre-polymerization reaction is carried out on the highly branched polyhydroxy-carboxylic acid polymer and polyisocyanate to obtain a prepolymer;
adding polyol into the prepolymer, and polymerizing again;
adding a hydrophilic chain extender, a dye and a solvent for chain extension, measuring the content of NCO after reaction, and then cooling;
adding acetone to reduce the viscosity of the system and reduce the temperature, adding deionized water for dispersion under high-speed shearing, and removing the acetone in the system under reduced pressure to obtain the aqueous PU.
2. The color-fixing waxy-feeling leather surface layer polishing treatment agent according to claim 1, which is characterized by comprising the following components in parts by weight: 40-60 parts of water-based PU, 1-3 parts of wetting agent, 5-8 parts of silicon dioxide matting powder, 5-10 parts of dispersing agent, 5-10 parts of wax feeling hand feeling agent, 5-8 parts of thickening agent and 30-50 parts of water.
3. The fixed waxy-feel leather skin polishing treatment according to claim 1 wherein the highly branched polyhydroxy-carboxylic acid polymer is self-polymerized from dimethylolpropionic acid.
4. The fixed waxy feel leather skin polishing treatment according to claim 1 wherein the R value of the polyisocyanate and polyhydroxy-carboxylic acid polymer is about 1.5.
5. The fixed waxy feel leather skin finishing treatment according to claim 1 wherein the polyisocyanate comprises one or both of toluene diisocyanate and isophorone diisocyanate.
6. The polishing treatment agent for the surface layer of leather with fixed color and waxy feel as claimed in claim 1, wherein the polyol comprises one or more of polypropylene glycol polyether polyol and polytetrahydrofuran ether glycol with molecular weight of 800-1500.
7. The finishing agent for the surface layer of leather having fixed color and waxy feel according to claim 1, wherein the dye is at least one selected from disperse red 91, disperse blue 14, solvent red L-B, and basic red 2.
8. A process for preparing the fixed waxy feel leather skin polishing treatment according to any one of claims 1-7 comprising the steps of:
(1) preparing an aqueous PU comprising:
pre-polymerization reaction is carried out on the highly branched polyhydroxy-carboxylic acid polymer and polyisocyanate to obtain a prepolymer;
adding polyol into the prepolymer, and polymerizing again;
adding a hydrophilic chain extender, a dye and a solvent for chain extension, measuring the content of NCO after reaction, and then cooling;
adding acetone to reduce the viscosity of the system and reduce the temperature, adding deionized water for dispersion under high-speed shearing, and removing the acetone in the system under reduced pressure to obtain aqueous PU;
(2) mixing and stirring aqueous PU, a wetting agent, silicon dioxide matting powder, a dispersing agent, a wax feeling agent, a thickening agent and water.
9. The method as claimed in claim 8, wherein the reaction temperature for the prepolymerization reaction of the polyhydroxy-carboxylic acid polymer with the polyisocyanate is 60-70 ℃ and the reaction time is 10-30 minutes.
10. The process according to claim 8, wherein the polymerization of the prepolymer and the polyol is carried out at a temperature of 70 to 100 ℃ and for a time of 1 to 3 hours.
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| CN107385922A (en) * | 2017-08-18 | 2017-11-24 | 江苏宝泽高分子材料股份有限公司 | A kind of water-based sense polishing agent and preparation method thereof |
| CN109486285A (en) * | 2018-10-30 | 2019-03-19 | 浙江蓝宇数码科技股份有限公司 | A kind of paint ink and preparation method of the dispersing agent containing super branched polyurethane |
| CN109880060A (en) * | 2019-02-01 | 2019-06-14 | 安徽建筑大学 | A kind of dendroid water polyurethane base high molecular dye and preparation method |
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