CN113152116B - Method for preparing hydrophobic PU leather by plasma technology - Google Patents
Method for preparing hydrophobic PU leather by plasma technology Download PDFInfo
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- CN113152116B CN113152116B CN202110472168.2A CN202110472168A CN113152116B CN 113152116 B CN113152116 B CN 113152116B CN 202110472168 A CN202110472168 A CN 202110472168A CN 113152116 B CN113152116 B CN 113152116B
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
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- D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
- D06N3/143—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer with polyurethanes and other polycondensation or polyaddition products, e.g. aminoplast
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- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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Abstract
The invention belongs to the technical field of polyurethane synthetic leather, and particularly relates to a method for preparing hydrophobic PU leather by using a plasma technology. Firstly, preparing PU wet method bass; then mixing the polyurethane base material with DMF, uniformly dispersing and defoaming to obtain a mixed solution A, and then fully and uniformly stirring the polyurethane dry-process fabric resin mixed with carbon black and the DMF, and defoaming to obtain a mixed solution B; uniformly coating the mixed solution B on the surface of release paper, drying, coating the mixed solution A on the surface of the release paper, then adhering PU wet-process bass on the surface of the release paper, and drying and stripping to obtain PU leather; the organosilicon forms a continuous and stable film on the surface of the PU leather by a plasma method, the film has high bonding fastness with the PU leather, the PU leather has hydrophobicity and long service life, and the surface contact angle of the PU leather is still 96 degrees after 200 times of cleaning; meanwhile, the invention has the advantages of better operation convenience, economy, practicability, environmental protection and safety.
Description
Technical Field
The invention belongs to the technical field of polyurethane synthetic leather, and particularly relates to a method for preparing hydrophobic PU leather by using a plasma technology.
Background
Plasma technology is common in recent years, but the hydrophobic polyurethane synthetic leather prepared by the plasma technology is very popular. Among them, the plasma technique belongs to the atmospheric pressure plasma technique, which has the advantages that the low pressure plasma technique does not have. The atmospheric pressure plasma can quickly and effectively create a plasma region in which free electrons, ions, free radicals and other types of active species can stably exist under specific conditions. The preparation method for obtaining the hydrophobic PU leather generally comprises the steps of loading fluorocarbon and organosilane on the surface of the PU leather, wherein the common fluorocarbon is C2F4、C3F6、C4F8And C6F14And the like. But the fluorocarbon forms hydrophobicToxic hydrofluoric acid is generated while the surface is sex, so that the human body and the environment are seriously harmed, and the defect is not solved all the time. Therefore, organosilicon is used as a hydrophobic material in synthetic leather, but the organosilicon has a defect that the organosilicon cannot be firmly loaded on the surface of the synthetic leather, and after 3-4 times of water washing, the organosilicon falls off from the surface of the synthetic leather, namely the organosilicon has no hydrophobic characteristics.
In order to improve the problems, the hydrophobic organic silicon is firmly loaded on the surface of the PU leather by an atmospheric pressure plasma method. The technology provides a powerful reference for the preparation of the hydrophobic PU leather.
Disclosure of Invention
At present, the plasma technology is widely applied to the fields of electronics, chemical engineering, new materials and the like, and the application and preparation technology of the plasma are quite mature. In order to enable the prepared organic silicon type hydrophobic PU leather to still have hydrophobic characteristics on the premise of repeated cleaning, a large amount of experimental researches are carried out, and the invention provides a preparation method for preparing the hydrophobic PU leather by using a plasma technology.
In order to achieve the purpose, the invention adopts the following technical scheme that the hydrophobic PU leather comprises the following components:
20-30 parts of polyurethane wet-process resin
10-20 parts of polyurethane base material
10-20 parts of polyurethane dry-process fabric resin
4-8 parts of organic silicon
50-60 parts of DMF (dimethyl formamide) solvent
A method for preparing hydrophobic PU leather by a plasma technology has a surface contact angle of 96 degrees, and after 200 times of cleaning, the surface contact angle still reaches 96 degrees and is basically unchanged, so that the hydrophobic PU leather has a good hydrophobic effect.
A method for preparing hydrophobic PU leather by using a plasma technology comprises the following steps:
(1) preparing PU wet method bass: firstly, mixing polyurethane wet-process resin with lignocellulose, black slurry and a solvent DMF, uniformly dispersing, then carrying out vacuum defoaming to obtain a mixed solution, uniformly coating the mixed solution on the surface of a leather base fabric, solidifying for a period of time after coating, taking out after solidification, and carrying out pressurized water and drying to obtain the PU wet-process bass;
(2) mixing a polyurethane substrate with DMF (dimethyl formamide), uniformly dispersing and defoaming to obtain a mixed solution A for later use;
(3) mixing the polyurethane dry-process fabric resin with carbon black and DMF (dimethyl formamide) uniformly and fully stirring and defoaming to obtain a mixed solution B for later use;
(4) preparing PU leather: uniformly coating the mixed liquid B prepared in the step (3) on the surface of release paper, drying, coating the mixed liquid A prepared in the step (2) on the surface of the release paper, sticking the PU wet-process bass prepared in the step (1) on the surface of the release paper, drying again, and finally stripping the PU wet-process bass from the surface of the release paper to obtain PU leather;
(5) PU leather pretreatment: placing the prepared PU leather in an environment with the relative humidity of 65-68%, and pretreating for a period of time under a certain temperature condition to obtain pretreated PU leather;
(6) plasma activated silicone: placing the pretreated PU leather in a plasma generator, performing discharge treatment by radio, wherein argon is used as a load gas of organic silicon, and controlling the flow rate of the argon so that the organic silicon forms a continuous film on the surface of the PU leather; the final product, namely the hydrophobic PU leather is obtained.
Preferably, the mass ratio of the polyurethane wet process resin, the lignocellulose, the black pulp and the DMF in the step (1) is 100: 30: 1: 50; the polyurethane wet process resin is purchased from Zhejiang Asahi Sichuan resin company, and is specifically one or a combination of WS-8980, WS-8706, WS-8712, WS-8915B and WS-8703.
Preferably, the dispersing condition in the step (1) is 5000-8000 r.min-1(ii) a The coating thickness is 1-1.5 mm; the solidification time is 10-15 min.
Preferably, the mass ratio of the polyurethane substrate to the DMF in the step (2) is 2: 1; the dispersion condition is 5000-8000 r-min-1(ii) a The polyurethane base material is obtained from Zhejiang Asahi Sichuan resin company, and specifically is one or a combination of more of DM-51DTS, DM-54DT, DM-55DT, DM-4027N and DM-4708.
Preferably, the mass ratio of the polyurethane dry-process fabric resin, the carbon black and the DMF in the step (3) is 100: 3: 80; the dispersion condition is 5000-8000 r-min-1(ii) a The polyurethane dry-process fabric resin is purchased from Zhejiang Asahuan resin company, and is specifically one or a combination of more of DF-2090EN, DF-2100EN, DF-80, DF-2022 and DF-2058.
Preferably, the mixed solution B in the step (4) is uniformly coated on the surface of the release paper, and the coating thickness is 0.1-0.15 mm; the thickness of the coating of the mixed solution A is 0.1-0.15 mm; the drying temperature is 110 ℃.
Preferably, the certain temperature in the step (5) is 20-23 ℃, and the period of pretreatment is 24 hours.
Preferably, the organosilicon in the step (6) is one or a combination of dimethylsilane, trimethylsilane, tetramethylsilane, hexamethyldisilane or methyltriethoxysilane; the volume of the organic silicon accounts for 2 percent of the total volume of the argon and the organic silicon.
Preferably, the argon gas flow rate in the step (6) is 6 L.min-1～9L·min-1(ii) a The power of the plasma generator is 40-70W; the time of the discharge treatment is 20-30 min.
The starting points of the above-mentioned preferable various compounds and the adjustment of physical property parameters are the results of comprehensive consideration in various aspects such as synergistic restoration effect, economic cost, environmental protection, danger, etc.
According to the invention, the polyurethane synthetic leather is prepared firstly, the silane compound is uniformly loaded on the surface of the PU leather by using a normal pressure plasma technology, and the silane compound generates active free radicals by combining the plasma technology with rare gas, so that not only can a continuous film be formed, but also the silane compound can react with organic bonds in the PU leather, and the polyurethane synthetic leather can be firmly loaded on the surface of the PU leather. The conventional method such as physically mixing organic silicon with PU resin is avoided, and although the prepared PU leather has hydrophobic property, the hydrophobic property is gradually lost after being washed for a plurality of times. The hydrophobic PU leather prepared by the plasma technology has longer service life, and the hydrophobic property of the leather is basically kept unchanged after the leather is repeatedly cleaned for a long time.
Has the advantages that:
compared with the traditional hydrophobic PU leather prepared by the plasma technology, the preparation method for preparing the hydrophobic PU leather has the following obvious advantages in several aspects: (1) the organosilicon forms a continuous and stable film on the surface of the PU leather by a plasma method, the bonding fastness of the film and the PU leather is higher, the PU leather has hydrophobicity and longer service life, the contact angle is basically unchanged after 200 times of cleaning, and the defect that the hydrophobicity of the traditional hydrophobic PU leather is lost after being cleaned for several times is avoided; (2) organic silicon is loaded on the surface of the PU leather by a plasma method, no toxic and harmful gas is discharged in the process, and no environmental pollution exists; (3) the finally prepared PU leather has a larger contact angle, namely, the hydrophobic property is better; (4) the organic silicon is more uniformly distributed on the surface of the PU leather; (5) low cost, high economic value and easy operation.
Detailed Description
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and substance of the invention.
Description of materials: selecting one or more of WS-8980, WS-8706, WS-8712, WS-8915B and WS-8703 as polyurethane wet resin;
the polyurethane backing material is selected from one or a combination of more of DM-51DTS, DM-54DT, DM-55DT, DM-4027N and DM-4708;
the polyurethane dry-process fabric resin is selected from one or a combination of more of DF-2090EN, DF-2100EN, DF-80, DF-2022 and DF-2058
WS-8980, WS-8706, WS-8712, WS-8915B, WS-8703, DM-51DTS, DM-54DT, DM-55DT, DM-4027N, DM-4708, DF-2090EN, DF-2100EN, DF-80, DF-2022 and DF-2058 were all obtained from Asahi Sichuan resin, Zhejiang.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
First, preparation process
(1) Firstly, mixing 30g of lignocellulose, 1g of black paste and 50g of DMF (dimethyl formamide) solvent with 100g of polyurethane wet-process resin in total amount, and heating at 8000 r/min-1Uniformly dispersing at a high speed, performing vacuum defoaming to obtain a mixed solution, coating the mixed solution on the surface of a leather base fabric, fully solidifying for 10min, taking out, and performing water pressing and drying to obtain the PU wet-process bass;
(2) 100g of polyurethane primer was mixed with 50g of DMF at 8000 r.min-1Dispersing uniformly at a high speed and defoaming to obtain a mixed solution A for later use;
(3) mixing 100g of polyurethane dry-process fabric resin with 3g of carbon black and 80g of DMF, and fully stirring and defoaming to obtain a mixed solution B for later use.
(4) Uniformly coating the mixed solution B prepared in the step (3) on the surface of release paper, wherein the coating thickness is 0.1mm, drying the release paper in a drying oven at 110 ℃, and coating the mixed solution A prepared in the step (2) on the surface of the release paper, wherein the coating thickness is 0.1 mm; and (2) sticking the PU wet-process Bass prepared in the step (1) on the surface of the PU wet-process Bass, drying in an oven at the temperature of 110 ℃, and finally stripping from the surface of release paper to obtain the PU leather.
(5) The prepared PU leather is placed in an environment with the relative humidity of 65% and the temperature of 20 ℃ for pretreatment for 24 hours;
(6) plasma activated silicone: and (2) placing the pretreated PU leather in a plasma generator, performing discharge treatment by radio, wherein argon is used as load gas of organic silicon, the volume of the organic silicon accounts for 2% of the total volume of the argon and the organic silicon, and controlling the flow rate of the argon gas to ensure that the organic silicon forms a continuous film on the surface of the PU leather, thus obtaining the hydrophobic PU leather product.
The contact angle of PU leather is tested to determine whether the PU leather has hydrophobic property, the PU leather is repeatedly washed, and the stability of the hydrophobic property is tested.
The examples of the raw materials adopted in each scheme are as follows: :
example 1: WS-8980100 g for polyurethane wet process resin, DM-51DTS 100g for polyurethane base material, DF-2090EN 100g for polyurethane dry process fabric resin, dimethylsilane for organosilicon and 6 L.min for argon flow-1Plasma generator power 40W.
Example 2: WS-8706100 g for polyurethane wet process resin, DM-54DT 100g for polyurethane base material, DF-2100EN 100g for polyurethane dry process fabric resin, trimethylsilane for organosilicon and argon flow rate of 7 L.min-1Plasma generator power 50W.
Example 3: WS-8712100 g for polyurethane wet process resin, DM-55DT 100g for polyurethane base material, DF-80100 g for polyurethane dry process fabric resin, tetramethylsilane for organosilicon and argon flow rate of 8L/min-1Plasma generator power 60W.
Example 4: selecting WS-8915B 100g for polyurethane wet process resin, DM-4027N 100g for polyurethane bottom material, DF-2022100 g for polyurethane dry process fabric resin, hexamethyldisilane for organosilicon, and argon flow rate of 9L/min-1Plasma generator power 70W.
Comparative example:
(1) firstly, mixing 30g of lignocellulose, 1g of black paste and 50g of DMF (dimethyl formamide) solvent with 100g of polyurethane wet-process resin in total amount, and heating at 8000 r/min-1Uniformly dispersing at a high speed, performing vacuum deaeration to obtain a mixed solution, coating the mixed solution on the surface of a leather base cloth, fully solidifying for 10min, taking out, and performing water pressing and drying to obtain the PU wet-process bass;
(2) 100g of polyurethane primer was mixed with 50g of DMF at 8000 r.min-1Dispersing uniformly at a high speed and defoaming to obtain a mixed solution A for later use;
(3) 100g of polyurethane dry-process fabric resin is mixed with 3g of carbon black, 80g of DMF and 2g of organic silicon, and the mixture B is obtained after the mixture is fully stirred and defoamed for later use.
(4) Uniformly coating the surface of release paper with the mixed solution B prepared in the step (3), wherein the coating thickness is 0.1mm, drying in a drying oven at 110 ℃, and coating the surface of the release paper with the mixed solution A prepared in the step (2), wherein the coating thickness is 0.1 mm; and (2) sticking the PU wet-process Bass prepared in the step (1) on the surface of the PU wet-process Bass, drying in an oven at the temperature of 110 ℃, and finally stripping from the surface of release paper to obtain the PU leather.
Comparative example 1: WS-8980100 g of polyurethane wet-process resin, DM-51DTS 100g of polyurethane base material, DF-2090EN 100g of polyurethane dry-process fabric resin and 2g of organosilicon anionic organosilicon.
Comparative example 2: WS-8706100 g of polyurethane wet-process resin, DM-54DT 100g of polyurethane bottom material, DF-2100EN 100g of polyurethane dry-process fabric resin and 2g of cationic organosilicon.
Comparative example 3: WS-8712100 g of polyurethane wet-process resin, DM-55DT 100g of polyurethane primer, DF-80100 g of polyurethane dry-process fabric resin and 2g of organosilicon nonionic agent organosilicon.
Comparative example 4: 100g of WS-8915B for polyurethane wet-process resin, 100g of DM-4027N for polyurethane bottom material, DF-2022100 g for polyurethane dry-process fabric resin and 2g of multi-ionic organosilicon for organosilicon.
Firstly, measuring a contact angle:
4 microliter of water was dropped on the surface of the prepared PU leather, and the contact angle data thereof was measured by a contact angle measuring instrument. A larger contact angle indicates better hydrophobicity of the PU leather.
And cleaning the PU leather for 200 times by using the laundry detergent under the same condition, then testing the contact angle of the PU leather again, and observing the service life of the hydrophobicity of the PU leather.
Conclusion
Through the research of the above examples and comparative examples, it can be seen that tables 1 and 2 show that the preparation method of the hydrophobic PU leather by using the plasma technology is really feasible, a continuous and firm thin film can be formed on the surface of the PU leather by using the organosilicon, and the performance comparison shows that the PU leather prepared by using the conventional method has an obvious advantage in the aspect of hydrophobic service life. The table shows that the performance of each aspect in the embodiment 2 is better, the invention is feasible, and provides a powerful reference for the preparation of the hydrophobic PU leather, thereby having stronger economic benefit and environmental benefit.
TABLE 1
TABLE 2
Description of the drawings: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.
Claims (9)
1. A method for preparing hydrophobic PU leather by using a plasma technology is characterized by comprising the following steps:
(1) preparing PU wet method bass: firstly, mixing polyurethane wet-process resin with lignocellulose, black slurry and a solvent DMF, uniformly dispersing, then carrying out vacuum defoamation to obtain a mixed solution, uniformly coating the mixed solution on the surface of a leather base fabric, solidifying for a period of time after coating, taking out after solidification, and carrying out water pressing and drying to obtain PU wet-process bass; the polyurethane wet-process resin is purchased from Zhejiang Asahi Sichuan resin company, and is specifically one or a combination of WS-8980, WS-8706, WS-8712, WS-8915B and WS-8703;
(2) mixing a polyurethane substrate with DMF (dimethyl formamide), uniformly dispersing and defoaming to obtain a mixed solution A for later use; the polyurethane base material is purchased from Zhejiang Asahi Sichuan resin company, and is specifically one or a combination of more of DM-51DTS, DM-54DT, DM-55DT, DM-4027N and DM-4708;
(3) mixing the polyurethane dry-process fabric resin with carbon black and DMF (dimethyl formamide), stirring uniformly and defoaming to obtain a mixed solution B for later use; the polyurethane dry-process fabric resin is purchased from Zhejiang Asahi Sichuan resin company, and is specifically one or a combination of more of DF-2090EN, DF-2100EN, DF-80, DF-2022 and DF-2058;
(4) uniformly coating the mixed liquid B prepared in the step (3) on the surface of release paper, drying, coating the mixed liquid A prepared in the step (2) on the surface of the release paper, sticking the PU wet-process bass prepared in the step (1) on the surface of the release paper, drying again, and finally stripping the PU wet-process bass from the surface of the release paper to obtain PU leather;
(5) placing the PU leather prepared in the step (4) in an environment with the humidity of 65-68%, and pretreating at the temperature of 20-23 ℃ to obtain pretreated PU leather;
(6) placing the pretreated PU leather in a plasma generator, performing discharge treatment by radio, wherein argon is used as a load gas of organic silicon, and controlling the flow rate of the argon so that the organic silicon forms a continuous film on the surface of the PU leather; obtaining hydrophobic PU leather; the organic silicon is one or a combination of several of dimethylsilane, trimethylsilane, tetramethylsilane or hexamethyldisilane.
2. The method for preparing hydrophobic PU leather by using the plasma technology according to claim 1, wherein the mass ratio of the polyurethane wet process resin, the lignocellulose, the black pulp and the DMF in the step (1) is 100: 30: 1: 50.
3. the method for preparing hydrophobic PU leather by using the plasma technology according to claim 1, wherein the dispersion condition in the step (1) is 5000-8000 r-min-1(ii) a The coating thickness is 1-1.5 mm; the solidification time is 10-15 min.
4. The method for preparing hydrophobic PU leather by using the plasma technology according to claim 1, wherein the mass ratio of the polyurethane substrate to the DMF in the step (2) is 2: 1; the dispersion condition is 5000-8000 r-min-1。
5. The method for preparing hydrophobic PU leather by using the plasma technology according to claim 1, wherein the polyurethane dry process fabric resin, the carbon black and the polyurethane dry process fabric resin in the step (3)The mass ratio of DMF is 100: 3: 80; the dispersion condition is 5000-8000 r-min-1。
6. The method for preparing hydrophobic PU leather by using the plasma technology according to claim 1, wherein the mixed solution B is uniformly coated on the surface of release paper in the step (4) and the coating thickness is 0.1-0.15 mm; the thickness of the coating of the mixed solution A is 0.1-0.15 mm; the drying temperature is 110 ℃.
7. The process for preparing hydrophobic PU leather according to the plasma technology of claim 1, wherein the pretreatment time in the step (5) is 24 h.
8. The process for preparing hydrophobic PU leather according to claim 1, wherein the volume of the organosilicon in step (6) is 2% of the total volume of the argon and the organosilicon.
9. The process for preparing hydrophobic PU leather according to claim 1, wherein the argon gas flow rate in step (6) is 6L-min-1~9 L·min-1(ii) a The power of the plasma generator is 40-70W; the time of the discharge treatment is 20-30 min.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153773A (en) * | 2011-01-25 | 2011-08-17 | 温州市登达化工有限公司 | Preparation method of polyurethane material with waterproof surface |
| CN105671989A (en) * | 2015-12-21 | 2016-06-15 | 上海汇得科技股份有限公司 | Soft sheepskin-imitating polyurethane resin, preparation method thereof, and method of producing sheepskin-imitating artificial leather therewith |
| CN108894010A (en) * | 2018-08-17 | 2018-11-27 | 浙江旭川树脂有限公司 | The synthetic leather preparation method of vapor deposition doping hydrolysis and self-cleaning polyurethane |
| CN108978241A (en) * | 2018-08-20 | 2018-12-11 | 福建华夏合成革有限公司 | A kind of metal silk protein ultra-soft leather |
| CN108977595A (en) * | 2018-07-06 | 2018-12-11 | 合肥科天水性科技有限责任公司 | A kind of method that aqueous wet process prepares corium luggage leather |
| CN109881494A (en) * | 2019-03-14 | 2019-06-14 | 加通汽车内饰(常熟)有限公司 | A kind of pliability is high, the automobile-used artificial leather of hydrolysis and preparation method thereof |
| CN112391847A (en) * | 2020-10-16 | 2021-02-23 | 清远市齐力合成革有限公司 | Super-protein skin-feel synthetic leather |
| CN112458762A (en) * | 2020-11-30 | 2021-03-09 | 盐城工学院 | Preparation method of fabric after-finishing agent with warm-keeping function |
-
2021
- 2021-04-29 CN CN202110472168.2A patent/CN113152116B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153773A (en) * | 2011-01-25 | 2011-08-17 | 温州市登达化工有限公司 | Preparation method of polyurethane material with waterproof surface |
| CN105671989A (en) * | 2015-12-21 | 2016-06-15 | 上海汇得科技股份有限公司 | Soft sheepskin-imitating polyurethane resin, preparation method thereof, and method of producing sheepskin-imitating artificial leather therewith |
| CN108977595A (en) * | 2018-07-06 | 2018-12-11 | 合肥科天水性科技有限责任公司 | A kind of method that aqueous wet process prepares corium luggage leather |
| CN108894010A (en) * | 2018-08-17 | 2018-11-27 | 浙江旭川树脂有限公司 | The synthetic leather preparation method of vapor deposition doping hydrolysis and self-cleaning polyurethane |
| CN108978241A (en) * | 2018-08-20 | 2018-12-11 | 福建华夏合成革有限公司 | A kind of metal silk protein ultra-soft leather |
| CN109881494A (en) * | 2019-03-14 | 2019-06-14 | 加通汽车内饰(常熟)有限公司 | A kind of pliability is high, the automobile-used artificial leather of hydrolysis and preparation method thereof |
| CN112391847A (en) * | 2020-10-16 | 2021-02-23 | 清远市齐力合成革有限公司 | Super-protein skin-feel synthetic leather |
| CN112458762A (en) * | 2020-11-30 | 2021-03-09 | 盐城工学院 | Preparation method of fabric after-finishing agent with warm-keeping function |
Non-Patent Citations (2)
| Title |
|---|
| Hydrophobic modification of polyurethane foam for oil spill cleanup;Hua LI,Lifen Liu,Fenglin Yang;《Marine Pollution Bulletin》;20121231;第64卷;第1648-1653页 * |
| 有机硅环氧树脂对聚氨酯防水涂料结构和耐水性能的影响;殷锦捷等;《电镀与装饰》;20101231;第29卷(第12期);第58-60页 * |
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