CN113817393A - High-temperature-resistant back-sticking PVC (polyvinyl chloride) film aqueous back coating agent and preparation method thereof - Google Patents
High-temperature-resistant back-sticking PVC (polyvinyl chloride) film aqueous back coating agent and preparation method thereof Download PDFInfo
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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
- 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
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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
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
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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
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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
- C08G18/44—Polycarbonates
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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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
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
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- Polyurethanes Or Polyureas (AREA)
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Abstract
The high-temperature-resistant back-sticking PVC film aqueous back coating agent is prepared from the following raw materials in parts by mass: 38-49 parts of a polycarbon type aqueous polyurethane dispersion, 1-2 parts of a wetting agent, 18-26 parts of low molecular alcohol, 6-10 parts of matting powder, 2-5 parts of an aqueous cross-linking agent and 8-35 parts of deionized water; the aqueous back coating agent for the PVC film is prepared by adopting the polycarbon type polyurethane resin dispersoid as basic resin, functional additives and fillers, is an environment-friendly back coating agent without VOC, pollution and odor, has good bonding strength with the PVC film, has high-temperature-resistant and anti-adhesive capacity, and meets the requirement that an enterprise does not adhere to a guide roller at a high temperature of 180 ℃ in the production process.
Description
Technical Field
The invention relates to a PVC film aqueous back coating agent and a preparation method thereof, in particular to an aqueous back coating agent which has higher bonding strength with a PVC film, and has the properties of no back adhesion and no adhesion to a guide roller at a high temperature of 180 ℃ and a preparation method thereof.
Background
Most of the PVC decorative films for plastic uptake have back coating agents, and the problem of local foaming or separation from plates of the PVC films is well solved just by using the back coating agent. However, the back coating agent currently used in the market is still mainly a solvent type, and because the back coating agent contains a large amount of organic solvent, the back coating agent has a strong smell and can affect the body and the environment to a certain extent. And the water-based back coating agent has poor bonding strength on a PVC film and cannot meet the requirement of no adhesion to a guide roller at a high temperature of 180 ℃ in the production process, so the water-based back coating agent is not widely popularized and used.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-temperature-resistant back-sticking PVC film aqueous back coating agent and a preparation method thereof. The water-based back coating agent for the PVC film is prepared by adopting the polycarbon type polyurethane resin dispersoid as basic resin, functional additives and fillers, has good adhesive force with the PVC film, and ensures that the problems of sticking guide rollers and the like cannot occur in the production and use process because the water-based back coating agent does not re-stick at the high temperature of 180 ℃.
Compared with the traditional solvent type back coating agent, the water-based back coating agent disclosed by the invention is odorless, does not contain VOC (volatile organic compounds), and is more environment-friendly. The water-based back coating agent ensures high bonding strength on a PVC film, and simultaneously solves the problem of back adhesion of the current water-based back coating agent at a high temperature of 180 ℃.
The technical scheme of the invention is as follows:
the high-temperature-resistant back-sticking PVC film aqueous back coating agent is prepared from the following raw materials in parts by mass:
38-49 parts of a polycarbon type aqueous polyurethane dispersion, 1-2 parts of a wetting agent, 18-26 parts of low molecular alcohol, 6-10 parts of matting powder, 2-5 parts of an aqueous cross-linking agent and 8-35 parts of deionized water.
The wetting agent is one or a mixture of more than two of modified polysiloxane and polyether modified polydimethylsiloxane in any proportion.
The low molecular alcohol is one or a mixture of more than two of methanol, ethanol, isopropanol and n-propanol in any proportion.
The matting powder is fumed silica, talcum powder or polyacrylamide white powder.
The water-based cross-linking agent is one or a mixture of more than two of aziridine, polycarbodiimide water solution or water-based isocyanate curing agent in any proportion.
The polycarbon type aqueous polyurethane dispersion is prepared by the following method (the following parts are all in parts by mass):
carrying out vacuum dehydration on 130 parts of polycarbonate diol with molecular weight of 2000 at 120 ℃ for 1h, cooling to 80 ℃, adding 68 parts of isophorone diisocyanate, and reacting at 80 ℃ for 2h to obtain a primary polymer; then cooling to 55 ℃, respectively adding 11.8 parts of dimethylolpropionic acid, 80 parts of acetone and 6.5 parts of triethylamine, heating to 60 ℃, continuing to react for 4 hours, and then cooling to 35 ℃ to obtain a prepolymer; respectively adding 330 parts of deionized water and 65 parts of ethylenediamine aqueous solution into the obtained prepolymer at the stirring speed of 1200rpm, continuously stirring for 30min, heating to 65 ℃, distilling under reduced pressure to remove acetone, and preparing the polycarbon type aqueous polyurethane dispersion with the softening point of 170 ℃;
the ethylenediamine aqueous solution is obtained by dissolving 5 parts of ethylenediamine in 60 parts of deionized water.
The preparation method of the high-temperature-resistant back-sticking PVC film aqueous back coating agent comprises the following steps:
according to the formula, adding the polycarbon type aqueous polyurethane dispersoid into a stirring tank, sequentially adding low molecular alcohol and deionized water at the rotating speed of 600-800 rpm, stirring for 10min, adding a wetting agent, continuously stirring for 20min, then increasing the rotating speed to 1000rpm, adding matting powder, stirring for 40min, then reducing the rotating speed to 400rpm, adding an aqueous cross-linking agent, continuously stirring for 30min, and discharging to obtain the PVC film aqueous back coating agent.
Compared with the prior art, the invention has the beneficial effects that:
1. the water-based back coating agent is an environment-friendly back coating agent without VOC, pollution and odor, and effectively solves the problems that the traditional solvent-based back coating agent has a large odor and causes adverse effects on the environment and production personnel.
2. The water-based back coating agent disclosed by the invention has good bonding strength with a PVC film, ensures that the PVC film is not separated from a plate, has high-temperature-resistant re-adhesion capability, and meets the requirement of an enterprise on no adhesion of a guide roller at a high temperature of 180 ℃ in the production process.
Detailed Description
The invention is further described below by means of specific examples, without the scope of protection of the invention being limited thereto.
The polycarbon-type aqueous polyurethane dispersions used in the following examples were prepared as follows:
130g of polycarbonate diol (Zhejiang Huafeng New Material Co., Ltd.) with molecular weight of 2000 was put into a four-neck flask equipped with an electric stirrer, a reflux condenser tube and a mercury thermometer, and vacuum-dehydrated at 120 ℃ for 1 hour, then cooled to 80 ℃ and added with 68g of isophorone diisocyanate (Vanhua chemical), and reacted at 80 ℃ for 2 hours to obtain a primary polymer. Then the temperature is reduced to 55 ℃, 11.8g of dimethylolpropionic acid (chemical reagent of national drug group, Inc.), 80g of acetone and 6.5g of triethylamine (chemical reagent of national drug group, Inc.) are respectively added, the temperature is raised to 60 ℃, the reaction is continued for 4 hours, and then the temperature is reduced to 35 ℃. And respectively adding 330g of deionized water for dispersion and emulsification and 65g of an ethylene diamine (5g of ethylene diamine is dissolved in 60g of deionized water) aqueous solution into the obtained prepolymer under the high-speed stirring of 1200rpm, continuously stirring for 30 minutes, heating to 65 ℃, and distilling under reduced pressure to remove acetone, thereby finally obtaining the polycarbonate type aqueous polyurethane dispersion with the particle size of 68nm and the solid content of 35%.
Example 1
Adding 100g of aqueous polyurethane dispersion into a stirring tank, sequentially adding 50g of ethanol and 32g of deionized water at the rotating speed of 700r/min, stirring for 10 minutes, adding 4.5g of wetting agent BYK-191 (Pick chemical China Co., Ltd.), continuously stirring for 20 minutes, then increasing the rotating speed to 1000r/min, adding 16g of talcum powder, stirring for 40 minutes, reducing the rotating speed to 400r/min, finally adding 5g of aqueous cross-linking agent XP-2487/1 (Corcission Polymer Co., Ltd.) into the stirring tank, continuously stirring for 30 minutes, and discharging to obtain the PVC film aqueous back coating agent.
Example 2
Adding 100g of aqueous polyurethane dispersion into a stirring tank, sequentially adding 50g of ethanol and 32g of deionized water at the rotation speed of 700R/min, stirring for 10 minutes, adding 4.5g of wetting agent BYK-191, continuously stirring for 20 minutes, then increasing the rotation speed to 1000R/min, adding 14g of talcum powder and 2g of fumed silica R-972 (Corsia polymer Co., Ltd.), stirring for 40 minutes, reducing the rotation speed to 400R/min, finally adding 5g of aqueous cross-linking agent XP-2487/1 into the stirring tank, continuously stirring for 30 minutes, and discharging to obtain the PVC film aqueous back coating agent.
Example 3
Adding 100g of aqueous polyurethane dispersion into a stirring tank, sequentially adding 50g of ethanol and 32g of deionized water at the rotating speed of 700R/min, stirring for 10 minutes, adding 4.5g of wetting agent BYK-191, continuously stirring for 20 minutes, then increasing the rotating speed to 1000R/min, adding 12g of talcum powder and 4g of fumed silica R-972, stirring for 40 minutes, then reducing the rotating speed to 400R/min, finally adding 5g of aqueous cross-linking agent XP-2487/1 into the stirring tank, continuously stirring for 30 minutes, and discharging to obtain the PVC film aqueous back coating agent.
Example 4
Adding 100g of aqueous polyurethane dispersion into a stirring tank, sequentially adding 50g of ethanol and 32g of deionized water at the rotating speed of 700r/min, stirring for 10 minutes, adding 4.5g of wetting agent BYK-191, continuously stirring for 20 minutes, then increasing the rotating speed to 1000r/min, adding 16g of talcum powder, stirring for 40 minutes, reducing the rotating speed to 400r/min, finally adding 7g of aqueous cross-linking agent XP-2487/1 into the stirring tank, continuously stirring for 30 minutes, and discharging to obtain the PVC film aqueous back coating agent.
And (3) performance verification test:
1. uniformly coating the water-based back coating agent on a PVC film by a roller coating mode, then vacuum-sucking and attaching the PVC film coated with the back coating agent to a density board, and finally measuring the peel strength of the PVC film and the density board (tested according to GB/T2790-1995).
2. And (3) walking the PVC film coated with the back coating agent for a circle on a guide roller at a high temperature of 180 ℃, and judging the high-temperature-resistant re-adhesion condition of the water-based back coating agent by judging whether the PVC film can adhere to the guide roller.
TABLE 1 Experimental results of examples
| Example 1 | Example 2 | Example 3 | Example 4 | Commercially available product | |
| Peel strength | 34N/cm | 32N/cm | 31N/cm | 35N/cm | 22N/cm |
| Whether or not the surface is back-adhered at 180 DEG C | Without adhesive reversion | Without adhesive reversion | Without adhesive reversion | Without adhesive reversion | Return adhesion |
As can be seen from the above table, the waterborne back coating agents in the embodiments 1 to 4 of the invention are not only obviously superior to the current commercial products in bonding strength, but also solve the problem that the current commercial products are stuck to guide rollers due to high-temperature back adhesion to affect normal production.
The above-described embodiments are intended to be illustrative of the present invention and not to be limiting, and any modifications and equivalent arrangements included within the spirit and principle of the present invention are intended to fall within the scope of the present invention.
Claims (7)
1. The high-temperature-resistant back-sticking PVC film aqueous back coating agent is characterized by comprising the following raw materials in parts by mass:
38-49 parts of a polycarbon type aqueous polyurethane dispersion, 1-2 parts of a wetting agent, 18-26 parts of low molecular alcohol, 6-10 parts of matting powder, 2-5 parts of an aqueous cross-linking agent and 8-35 parts of deionized water.
2. The high-temperature-resistant back coating agent for the PVC film, which is claimed in claim 1, is characterized in that the wetting agent is one or a mixture of more than two of modified polysiloxane and polyether modified polydimethylsiloxane in any proportion.
3. The high-temperature-resistant back coating agent for the PVC film, which is claimed in claim 1, is characterized in that the low-molecular alcohol is one or a mixture of more than two of methanol, ethanol, isopropanol and n-propanol in any proportion.
4. The high-temperature-resistant back-sticking PVC film aqueous back coating agent as claimed in claim 1, wherein the matting powder is fumed silica, talcum powder or polyacrylamide white powder.
5. The high-temperature-resistant back coating for PVC films according to claim 1, wherein the aqueous cross-linking agent is one or a mixture of more than two of aziridine, aqueous polycarbodiimide solution or aqueous isocyanate curing agent in any proportion.
6. The high-temperature-resistant back-sticking PVC film aqueous back coating agent as claimed in claim 1, wherein the polycarbon type aqueous polyurethane dispersion is prepared by the following method:
carrying out vacuum dehydration on 130 parts of polycarbonate diol with molecular weight of 2000 at 120 ℃ for 1h, cooling to 80 ℃, adding 68 parts of isophorone diisocyanate, and reacting at 80 ℃ for 2h to obtain a primary polymer; then cooling to 55 ℃, respectively adding 11.8 parts of dimethylolpropionic acid, 80 parts of acetone and 6.5 parts of triethylamine, heating to 60 ℃, continuing to react for 4 hours, and then cooling to 35 ℃ to obtain a prepolymer; respectively adding 330 parts of deionized water and 65 parts of ethylenediamine aqueous solution into the obtained prepolymer at the stirring speed of 1200rpm, continuously stirring for 30min, heating to 65 ℃, distilling under reduced pressure to remove acetone, and preparing the polycarbon type aqueous polyurethane dispersion with the softening point of 170 ℃;
the ethylenediamine aqueous solution is obtained by dissolving 5 parts of ethylenediamine in 60 parts of deionized water.
7. The preparation method of the high-temperature-resistant back-sticking PVC film aqueous back coating agent as claimed in claim 1, wherein the preparation method comprises the following steps:
according to the formula, adding the polycarbon type aqueous polyurethane dispersoid into a stirring tank, sequentially adding low molecular alcohol and deionized water at the rotating speed of 600-800 rpm, stirring for 10min, adding a wetting agent, continuously stirring for 20min, then increasing the rotating speed to 1000rpm, adding matting powder, stirring for 40min, then reducing the rotating speed to 400rpm, adding an aqueous cross-linking agent, continuously stirring for 30min, and discharging to obtain the PVC film aqueous back coating agent.
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| CN202110992315.9A CN113817393A (en) | 2021-08-27 | 2021-08-27 | High-temperature-resistant back-sticking PVC (polyvinyl chloride) film aqueous back coating agent and preparation method thereof |
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| CN202110992315.9A CN113817393A (en) | 2021-08-27 | 2021-08-27 | High-temperature-resistant back-sticking PVC (polyvinyl chloride) film aqueous back coating agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116285646A (en) * | 2022-11-30 | 2023-06-23 | 广东邦固化学科技有限公司 | Water-based paint with excellent adhesive force to polypropylene film and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110862506A (en) * | 2019-10-29 | 2020-03-06 | 中国科学院山西煤炭化学研究所 | Synthetic method of waterborne polyurethane primer |
| CN112341918A (en) * | 2020-10-23 | 2021-02-09 | 杭州海维特化工科技有限公司 | Plasticizer migration resistant PVC film water-based back coating agent and preparation method thereof |
-
2021
- 2021-08-27 CN CN202110992315.9A patent/CN113817393A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110862506A (en) * | 2019-10-29 | 2020-03-06 | 中国科学院山西煤炭化学研究所 | Synthetic method of waterborne polyurethane primer |
| CN112341918A (en) * | 2020-10-23 | 2021-02-09 | 杭州海维特化工科技有限公司 | Plasticizer migration resistant PVC film water-based back coating agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116285646A (en) * | 2022-11-30 | 2023-06-23 | 广东邦固化学科技有限公司 | Water-based paint with excellent adhesive force to polypropylene film and preparation method thereof |
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Application publication date: 20211221 |
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