CN108219599B - Coating solution of cellulose membrane - Google Patents
Coating solution of cellulose membrane Download PDFInfo
- Publication number
- CN108219599B CN108219599B CN201711445499.7A CN201711445499A CN108219599B CN 108219599 B CN108219599 B CN 108219599B CN 201711445499 A CN201711445499 A CN 201711445499A CN 108219599 B CN108219599 B CN 108219599B
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- Prior art keywords
- coating solution
- cellulose
- vinyl chloride
- vinyl acetate
- cellulose membrane
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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
- C09D127/00—Coating compositions based on 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; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on 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; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/04—Coating compositions based on 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; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C09D127/06—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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a coating solution of a cellulose membrane, which is prepared by taking a mixed solvent as a solvent, dissolving a copolymer containing vinyl chloride and vinyl acetate, a cross-linking agent and an auxiliary agent, coating the surface of the cellulose membrane with the coating solution, and drying and humidifying the cellulose membrane. The coating solution endows the cellulose membrane with good performances such as barrier property, heat sealing property, thermal stability, light stability and the like.
Description
Technical Field
The invention relates to a coating solution of a cellulose membrane, which can be used for preparing a coated cellulose membrane and belongs to the field of coated cellulose products.
Background
With the continuous development of the packaging industry and the continuous improvement of the requirements of people on packaging products, the coated cellulose films with different degrees of water vapor barrier performance are more and more favored by customers, and the annual demand of products is continuously increased. At present, domestic coated cellulose membranes mainly comprise high-water-vapor-barrier coated cellulose membranes such as PVDC (polyvinylidene chloride) coating, nitrocellulose coating and the like, and the production process has the problems of serious toluene pollution, high solvent recovery cost and the like, and environmental protection and cost; the domestic production of the coated cellulose membrane with medium water vapor barrier property which has vigorous market demand is still blank. The invention provides a coating solution of a cellulose membrane, which is a benzene-free solvent-type environment-friendly coating and can be used for preparing a coated cellulose membrane with medium water vapor barrier property.
Disclosure of Invention
The invention provides a coating solution of a cellulose membrane, which can be used for preparing the cellulose membrane and endows the cellulose membrane with good barrier property, heat sealing property, thermal stability, light stability and other properties.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coating solution of a cellulose membrane takes a mixed solvent as a solvent, and a copolymer containing vinyl chloride and vinyl acetate, a cross-linking agent and an auxiliary agent are dissolved in the coating solution.
Preferably, the mixed solvent is a mixed solvent prepared from ethyl acetate and butanone according to a certain proportion.
Preferably, the copolymer containing vinyl chloride and vinyl acetate is one or more of copolymers containing vinyl chloride and vinyl acetate as comonomers.
Preferably, the crosslinking agent is an isocyanate crosslinking agent.
Preferably, the auxiliaries include an anti-blocking agent, a light stabilizer and a heat stabilizer.
Preferably, the anti-sticking agent is silica sol and the light stabilizer is a hindered amine light stabilizer.
Preferably, the mass ratio of ethyl acetate to butanone in the mixed solvent is 1:1-2: 1.
Preferably, the mass content of the chloroethylene in the copolymer containing chloroethylene and vinyl acetate is 60-90%, and the mass content of the vinyl acetate is 1-40%.
Preferably, the mass content of the copolymer containing vinyl chloride and vinyl acetate in the coating solution is 5-15%.
Preferably, the mass content of the cross-linking agent in the coating solution is 1 to 10%.
The copolymer containing the vinyl chloride and the vinyl acetate has good film forming property, and the film has proper water vapor barrier property; the copolymer has good compatibility with cellulose, and can form good adhesion on a cellulose membrane, and the added cross-linking agent can further improve the adhesion of the coating on the cellulose membrane; the used solvent has strong dissolving capacity and is environment-friendly.
The coating solution can be used for preparing a coating cellulose film through conventional coating, drying and humidifying treatment, and the prepared coating cellulose film product has the following indexes: heat seal strength: not less than 350g/37 mm; water vapor permeability value: 400-inch square meter is used for 600 g/square meter 24 h; thermal stability: heating at 130 deg.C for 10min to obtain a heat sealing value and water vapor permeability value which are not affected; light stability: the coating is not embrittled after being exposed for 15 days in the sun, and the heat sealing value and the water vapor permeability value are basically not influenced.
The beneficial technical effects of the invention are as follows: by means of the characteristics of the coating copolymer and the characteristics of the formula auxiliary agent, the cellulose membrane can be endowed with proper water vapor barrier property, high heat sealing property, good heat stability, light stability and other properties, and can adapt to various use environments; the cellulose coating film prepared by the coating solution can solve the problems of environmental protection and cost such as toluene residue, high solvent recovery cost and the like of the traditional cellulose coating film.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The coating solution of the cellulose membrane takes a mixed solvent as a solvent, is dissolved with a copolymer containing vinyl chloride and vinyl acetate, a cross-linking agent and an auxiliary agent, and specifically comprises the following components:
1. mixing solvent: 75g of ethyl acetate and 75g of butanone;
2. copolymers containing vinyl chloride and vinyl acetate: the copolymer consists of three copolymers a, b and c, wherein the three copolymers contain vinyl chloride and vinyl acetate as comonomers, namely: a (88% of vinyl chloride and 1% of vinyl acetate) 5.87g, b (84% of vinyl chloride and 15% of vinyl acetate) 3.91g, and c (60% of vinyl chloride and 40% of vinyl acetate) 1.96 g;
3. 3.06g of isocyanate crosslinking agent;
4. auxiliary agent: 0.2g of heat stabilizer, 0.4g of light stabilizer and 0.2g of anti-sticking agent.
The above components were added to a conical flask, and stirred and mixed to obtain a coating solution.
The coating solution can further adjust the viscosity by adding the mixed solvent, the coating solution is coated on the surface of the cellulose membrane, and the cellulose membrane is prepared after drying and humidifying treatment, wherein the heat seal strength of the cellulose membrane is as follows: 421g/37 mm; moisture permeability value for 24 h: 522 g/(. square meter. 24 h); thermal stability: heating at 130 deg.C for 10min to obtain heat sealing value and water vapor permeability value; light stability: the coating is not embrittled after being exposed for 15 days in the sun, and the heat sealing value and the water vapor permeability value are not influenced. By contrast, when the coating solution is not used, the water vapor permeability value of the cellulose membrane for 1 hour is 200 g/square meter 1 hour, and an accurate value cannot be obtained due to an overlarge water vapor permeability value in a 24-hour test.
Example 2
The coating solution of the cellulose membrane takes a mixed solvent as a solvent, is dissolved with a copolymer containing vinyl chloride and vinyl acetate, a cross-linking agent and an auxiliary agent, and specifically comprises the following components:
1. mixing solvent: 100g ethyl acetate and 50g butanone;
2. copolymers containing vinyl chloride and vinyl acetate: the copolymer consists of three copolymers a, b and c, wherein the three copolymers contain vinyl chloride and vinyl acetate as comonomers, namely: a (88% of vinyl chloride and 1% of vinyl acetate) 5.87g, b (84% of vinyl chloride and 15% of vinyl acetate) 2.94g, and c (60% of vinyl chloride and 40% of vinyl acetate) 2.94 g;
3. 2.3g of isocyanate crosslinking agent;
4. auxiliary agent: 0.4g of heat stabilizer, 0.8g of hindered amine light stabilizer and 0.4g of anti-sticking agent silica sol.
The above components were added to a conical flask, and stirred and mixed to obtain a coating solution.
The coating solution can further adjust the viscosity by adding the mixed solvent, the coating solution is coated on the surface of the cellulose membrane, and the heat seal strength of the coated cellulose membrane product is as follows: 452g/37 mm; water vapor permeability value: 489 g/square meter (24 h); thermal stability: heating at 130 deg.C for 10min to obtain heat sealing value and water vapor permeability value; light stability: the coating is not embrittled after being exposed for 15 days in the sun, and the heat sealing value and the water vapor permeability value are not influenced. By contrast, when the coating solution is not used, the water vapor permeability value of the cellulose membrane for 1 hour is 200 g/square meter 1 hour, and an accurate value cannot be obtained due to an overlarge water vapor permeability value in a 24-hour test.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and variations which do not require inventive efforts and are made by those skilled in the art are still within the scope of the present invention.
Claims (7)
1. The cellulose coating film is characterized by being prepared from a cellulose film and a coating solution, wherein the coating solution takes a mixed solvent as a solvent, a copolymer containing vinyl chloride and vinyl acetate, a cross-linking agent and an auxiliary agent are dissolved in the solvent, the mixed solvent is a mixed solvent prepared from ethyl acetate and butanone according to a certain proportion, the proportion of the ethyl acetate to the butanone in the mixed solvent is 1:1-2:1, the mass content of vinyl chloride in the copolymer containing the vinyl chloride and the vinyl acetate is 60-90%, and the mass content of the vinyl acetate is 1-40%.
2. The cellulose coating film according to claim 1, wherein the copolymer containing vinyl chloride and vinyl acetate is one or more of copolymers containing vinyl chloride and vinyl acetate as comonomers.
3. The cellulose coating film according to claim 1, wherein the crosslinking agent is an isocyanate crosslinking agent.
4. The cellulose coating film according to claim 1, wherein the auxiliary agents include anti-sticking agents, light stabilizers and heat stabilizers.
5. The cellulose coating film according to claim 4, wherein the anti-adhesive agent in the coating solution is silica sol and the light stabilizer is hindered amine light stabilizer.
6. The cellulose coating film according to claim 1, wherein the coating solution contains 5 to 15% by mass of a copolymer containing vinyl chloride and vinyl acetate.
7. The cellulose coating film according to claim 1, wherein the mass content of the cross-linking agent in the coating solution is 1-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445499.7A CN108219599B (en) | 2017-12-27 | 2017-12-27 | Coating solution of cellulose membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445499.7A CN108219599B (en) | 2017-12-27 | 2017-12-27 | Coating solution of cellulose membrane |
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| Publication Number | Publication Date |
|---|---|
| CN108219599A CN108219599A (en) | 2018-06-29 |
| CN108219599B true CN108219599B (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711445499.7A Active CN108219599B (en) | 2017-12-27 | 2017-12-27 | Coating solution of cellulose membrane |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1927901A (en) * | 2006-09-20 | 2007-03-14 | 北京展辰化工有限公司 | High weatherability resin, preparation method thereof and coating composition containing the same |
| CN101402772A (en) * | 2008-10-30 | 2009-04-08 | 匡建钢 | Low-temperature plasticizing type PVC plastic colloidal sols and method of producing the same |
| CN105385252A (en) * | 2015-11-16 | 2016-03-09 | 国网山东省电力公司电力科学研究院 | Undersurface integrated heavy anticorrosion coating |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3402063A (en) * | 1963-10-08 | 1968-09-17 | Fmc Corp | Curl-resistant moistureproof regenerated cellulose film |
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2017
- 2017-12-27 CN CN201711445499.7A patent/CN108219599B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1927901A (en) * | 2006-09-20 | 2007-03-14 | 北京展辰化工有限公司 | High weatherability resin, preparation method thereof and coating composition containing the same |
| CN101402772A (en) * | 2008-10-30 | 2009-04-08 | 匡建钢 | Low-temperature plasticizing type PVC plastic colloidal sols and method of producing the same |
| CN105385252A (en) * | 2015-11-16 | 2016-03-09 | 国网山东省电力公司电力科学研究院 | Undersurface integrated heavy anticorrosion coating |
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| CN108219599A (en) | 2018-06-29 |
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