CN112239528B - Environment-friendly TPU film for table mat and preparation method thereof - Google Patents

Environment-friendly TPU film for table mat and preparation method thereof Download PDF

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Publication number
CN112239528B
CN112239528B CN202010988945.4A CN202010988945A CN112239528B CN 112239528 B CN112239528 B CN 112239528B CN 202010988945 A CN202010988945 A CN 202010988945A CN 112239528 B CN112239528 B CN 112239528B
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parts
polyol
tpu film
diisocyanate
tpu
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CN112239528A (en
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何建雄
杨博
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Dongguan Xionglin New Materials Technology Co Ltd
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Dongguan Xionglin New Materials Technology Co Ltd
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Abstract

The invention provides an environment-friendly TPU film for a table mat and a preparation method thereof. The TPU film comprises the following raw material components in parts by weight: 20-30 parts of diisocyanate, 80-100 parts of oligomer polyol, 5-10 parts of thermosetting fluorocarbon resin, 20-30 parts of polyvinyl butyral, 4-8 parts of chain extender and 0.1-1 part of catalyst. The TPU film is prepared by dewatering and mixing oligomer polyalcohol, thermosetting fluorocarbon resin and polyvinyl acetal to obtain a mixed solution, extruding and granulating the mixed solution and other raw material components through an extruder, banburying through a mixer, and rolling to form a film. The environment-friendly TPU film for the table mat, provided by the invention, has the advantages of good stain resistance and adhesion, higher flexibility and strength, no volatile organic substance, safety and environmental friendliness, and is suitable for table mat products.

Description

Environment-friendly TPU film for table mat and preparation method thereof
Technical Field
The invention belongs to the technical field of polyurethane elastomer materials, and particularly relates to an environment-friendly TPU film for a table mat and a preparation method thereof.
Background
Thermoplastic polyurethane elastomer (TPU) is a linear or slightly branched and crosslinked polymer material with hard block and soft block structures, and is one of six synthetic materials with development prospects in the world currently. The TPU has a wide hardness range (Shore A60-Shore D80), high elasticity in the whole hardness range, good flexibility in a wide temperature range (-40-120), high tensile strength, high elongation, low compression set, wear resistance, tear resistance and the like.
With the development of technology, TPU materials have been widely used in the fields of conveyor belts, hoses, automobile parts, shoe soles, synthetic leathers, paints, electric wires and cables, and the like. The nature of TPU materials is often very large, depending on the field of application, and it is often necessary to design specific molecular structures depending on the application.
The table mat is one of the application fields of TPU materials. Conventional materials for tablemats include cloth, PVC (polyvinyl chloride), soft glass, and the like. The cloth table mat has the advantages that the cloth table mat is easy to clean, but has no buffering effect and no waterproof and oilproof effects; the PVC table mat has waterproof capability, but is hard in texture, easy to crack, easy to cover with a layer of oil stain after being used for a period of time and difficult to clean; soft glass table mats also have similar disadvantages as PVC table mats.
The TPU material is soft in texture and high in strength, and the table mat adopting the TPU material has good buffering performance, can improve the comfort of the arms of people, and is widely used in various mat products. However, TPU as an organic polymer material also has the disadvantage of poor stain resistance. In addition, skid resistance is one of the targets that needs to be paid attention to table mat materials, but it is often contrary to stain resistance. Therefore, a table mat material having both good stain resistance and good adhesiveness has yet to be studied.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an environment-friendly TPU film for a table mat and a preparation method thereof. The TPU film has good stain resistance and adhesiveness, does not contain volatile organic substances, is safe and environment-friendly, and is suitable for being used in table mat products.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an environment-friendly TPU film for a table mat, which comprises the following raw material components in parts by weight:
20-30 parts of diisocyanate, 80-100 parts of oligomer polyol, 5-10 parts of thermosetting fluorocarbon resin, 20-30 parts of polyvinyl butyral, 4-8 parts of chain extender and 0.1-1 part of catalyst.
In the invention, the thermosetting fluorocarbon resin and the polyvinyl butyral can react with diisocyanate to form a main part of a molecular chain of the polyurethane material together with the oligomer polyol. The thermosetting fluorocarbon resin contains a large amount of fluorine elements, so that the surface tension of the TPU film can be obviously reduced, the stain resistance of the TPU film is improved, and meanwhile, the friction coefficient of the TPU film is low, so that the TPU film is not easy to attach to a table top; the polyvinyl butyral contains a large number of polar groups, has good adhesion to wood fibers, metal and polymers, and is beneficial to improving the friction force between the TPU film and table tops made of various materials. According to the invention, through the matching of the components, the TPU film which is soft in texture, resistant to contamination, firmly attached to a table top and not easy to slip is obtained.
In the invention, the dosage of the thermosetting fluorocarbon resin and the polyvinyl butyral needs to be kept in the range, and if the dosage of the thermosetting fluorocarbon resin is too much, the compatibility with a polyurethane matrix is poor, so that the TPU film has low strength and poor adhesiveness; if the dosage of the polyvinyl butyral is too much, the surface of the TPU film is easily sticky, and solid particles and oil stains are easily adsorbed and are not easy to clean.
In the present invention, the weight part of the diisocyanate may be 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, or the like.
The oligomer polyol may be present in an amount of 80 parts, 82 parts, 83 parts, 85 parts, 87 parts, 88 parts, 90 parts, 92 parts, 94 parts, 95 parts, 96 parts, 98 parts, 100 parts, or the like by weight.
The thermosetting fluorocarbon resin may be 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, or the like, by weight.
The polyvinyl butyral may be present in an amount of 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, or 30 parts by weight, or the like.
The weight portion of the chain extender can be 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts or 8 parts, etc.
The weight portion of the catalyst can be 0.1 portion, 0.2 portion, 0.3 portion, 0.4 portion, 0.5 portion, 0.6 portion, 0.7 portion, 0.8 portion, 0.9 portion or 1 portion, etc.
The following is a preferred technical solution of the present invention, but not a limitation to the technical solution provided by the present invention, and the object and advantageous effects of the present invention can be better achieved and achieved by the following preferred technical solution.
In a preferred embodiment of the present invention, the diisocyanate is an aliphatic diisocyanate and/or an aromatic diisocyanate.
Preferably, the content of aliphatic diisocyanate in the diisocyanate is more than 80 wt%; for example, it may be 80 wt%, 82 wt%, 85 wt%, 88 wt%, 90 wt%, 93 wt%, 95 wt%, 97 wt%, 100 wt%, or the like.
Preferably, the aliphatic diisocyanate is selected from one or a combination of at least two of hexamethylene diisocyanate, cyclohexanedimethylene diisocyanate and isophorone diisocyanate.
Preferably, the aromatic diisocyanate is selected from one or a combination of at least two of diisocyanate selected from toluene diisocyanate, diphenylmethane diisocyanate, p-phenylene diisocyanate or naphthalene diisocyanate.
In a preferred embodiment of the present invention, the oligomer polyol is polyether polyol and/or polyester polyol.
Preferably, the polyether polyol has a hydroxyl number of 75-80mg KOH/g (e.g., 75mg KOH/g, 76mg KOH/g, 77mg KOH/g, 78mg KOH/g, 79mg KOH/g, or 80mg KOH/g, etc.), and a number average molecular weight of 1000-2000 (e.g., 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, or 2000, etc.).
Preferably, the polyester polyol has a hydroxyl value of 50 to 60mg KOH/g (e.g., 50mg KOH/g, 51mg KOH/g, 52mg KOH/g, 53mg KOH/g, 54mg KOH/g, 55mg KOH/g, 56mg KOH/g, 57mg KOH/g, 58mg KOH/g, 59mg KOH/g, or 60mg KOH/g, etc.), and a number average molecular weight of 2000-4000 (e.g., 2000, 2200, 2400, 2600, 2800, 3000, 3200, 3400, 3600, 3800, or 4000, etc.).
Preferably, the polyether polyol is selected from one or a combination of at least two of polyoxyethylene polyol, polyoxypropylene polyol and polytetrahydrofuran polyol.
Preferably, the polyester polyol is selected from one or a combination of at least two of polycaprolactone polyol, polyhexamethylene adipate polyol, polyethylene adipate polyol, and polycarbonate polyol.
As a preferred technical solution of the present invention, the thermosetting fluorocarbon resin is a trifluoroethylene-vinyl ether-vinyl ester copolymer.
In a preferred embodiment of the present invention, the chain extender is one or a combination of at least two selected from the group consisting of 1, 4-butanediol, 1, 6-hexanediol, diethylene glycol, diethylaminoethanol, N-dihydroxy (diisopropyl) aniline, ethylenediamine, and 3,3 '-dichloro-4, 4' diamino-diphenylmethane.
In a preferred embodiment of the present invention, the catalyst is one or a combination of at least two selected from triethanolamine, N-methylmorpholine, N' -dimorpholinyldiethylether, tetra-N-butyltin, stannous chloride, stannous octoate, hydroxy-trimethyltin, or dibutyl-tin dilaurate.
As a preferred technical scheme of the invention, the TPU film also comprises 8-15 parts of a flame retardant; for example, it may be 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, or the like.
Preferably, the flame retardant is selected from one or a combination of at least two of melamine, melamine cyanuric acid, melamine phosphate, triphenyl phosphate, tris (β -chloroethyl) phosphate (TCEP), tris (β -chloropropyl) phosphate (TCPP), tris (2, 3-dichloropropyl) phosphate (TDCPP), polyphosphate.
In a second aspect, the present invention provides a method for preparing the TPU film of the first aspect, the method comprising the steps of:
(1) dehydrating and mixing the oligomer polyol, the thermosetting fluorocarbon resin and the polyvinyl acetal;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, and extruding while reacting to form TPU particles;
(3) banburying the TPU particles obtained in the step (2) through a mixer, and then rolling to form a film to obtain the TPU film.
In a preferred embodiment of the present invention, the dehydration in the step (1) is performed under vacuum.
Preferably, the temperature of the feeding section of the twin-screw extruder in step (2) is 100-.
Preferably, the banburying temperature in step (3) is 180-.
Preferably, the temperature of the rolling in step (3) is 150-.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
(1) mixing oligomer polyol, thermosetting fluorocarbon resin and polyvinyl acetal, and dehydrating for 1-2 hours under the vacuum condition of-0.085 to-0.095 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 100-;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, carrying out internal mixing at the temperature of 180 ℃ and 220 ℃ for 20-40min, and then rolling at the temperature of 150 ℃ and 180 ℃ to form a film to obtain the TPU film.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the components are matched with each other at a specific ratio to obtain the TPU film with good stain resistance and adhesiveness, the stain resistance of the TPU film reaches level 1, the dry friction static friction coefficient reaches 1-1.2, and the TPU film does not contain volatile organic substances, is safe and environment-friendly, and is suitable for being used in table mat products.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Part of the raw materials adopted in the embodiment of the invention are as follows:
trifluoroethylene-vinyl ether-vinyl ester copolymer: lumiflon LF710, Asahi glass Co., Ltd;
polyvinyl butyral: japanese kohli B20H.
Example 1:
the embodiment provides an environment-friendly TPU film for a table mat, which comprises the following raw material components in parts by weight:
Figure BDA0002690192110000071
wherein the diisocyanate consists of hexamethylene diisocyanate and diphenylmethane diisocyanate in a weight ratio of 90:10, the polyoxyethylene polyol has a hydroxyl value of 78KOH/g and a number average molecular weight of 1600.
The preparation method of the environment-friendly TPU film comprises the following steps:
(1) mixing polyoxyethylene polyol, trifluoroethylene-vinyl ether-vinyl ester copolymer and polyvinyl acetal, and dehydrating for 1h under the vacuum condition of-0.085 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 110 ℃, the temperature of a mixing section to be 140 ℃, the temperature of an extrusion section to be 180 ℃, the temperature of a machine head to be 170 ℃, and extruding while reacting to form TPU particles;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, internally mixing for 30min at 200 ℃, and then pressing into a film at 160 ℃ to obtain the environment-friendly TPU film.
Example 2:
the embodiment provides an environment-friendly TPU film for a table mat, which comprises the following raw material components in parts by weight:
Figure BDA0002690192110000072
Figure BDA0002690192110000081
wherein, the diisocyanate is composed of cyclohexane dimethylene diisocyanate and toluene diisocyanate according to the weight ratio of 82:18, the oligomer polyol is composed of polytetrahydrofuran polyol and polycaprolactone polyol according to the weight ratio of 50:50, the hydroxyl value of the polytetrahydrofuran polyol is 75KOH/g, the number average molecular weight is 1000, the hydroxyl value of the polycaprolactone polyol is 60KOH/g, and the number average molecular weight is 4000.
The preparation method of the environment-friendly TPU film comprises the following steps:
(1) mixing polytetrahydrofuran polyol, polycaprolactone polyol, trifluoroethylene-vinyl ether-vinyl ester copolymer and polyvinyl acetal, and dehydrating for 1.5h under the vacuum condition of-0.05 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 110 ℃, the temperature of a mixing section to be 130 ℃, the temperature of an extrusion section to be 170 ℃, the temperature of a machine head to be 180 ℃, and extruding while reacting to form TPU particles;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, carrying out internal mixing at 190 ℃ for 40min, and then rolling at 150 ℃ to form a film, thus obtaining the environment-friendly TPU film.
Example 3:
the embodiment provides an environment-friendly TPU film for a table mat. The material comprises the following raw material components in parts by weight:
Figure BDA0002690192110000082
Figure BDA0002690192110000091
wherein the oligomer polyol consists of polytetrahydrofuran polyol and polycarbonate polyol according to a weight ratio of 63:37, the polytetrahydrofuran polyol has a hydroxyl value of 75KOH/g and a number average molecular weight of 1000, and the polycarbonate polyol has a hydroxyl value of 55KOH/g and a number average molecular weight of 3000.
The preparation method of the environment-friendly TPU film comprises the following steps:
(1) mixing polytetrahydrofuran polyol, polycarbonate polyol, trifluoroethylene-vinyl ether-vinyl ester copolymer and polyvinyl acetal, and dehydrating for 1.2h under the vacuum condition of 0.015 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 100 ℃, the temperature of a mixing section to be 145 ℃, the temperature of an extrusion section to be 160 ℃, the temperature of a machine head to be 160 ℃, and extruding while reacting to form TPU particles;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, internally mixing for 20min at 210 ℃, and then rolling to form a film at 170 ℃ to obtain the environment-friendly TPU film.
Example 4:
the embodiment provides an environment-friendly TPU film for a table mat, which comprises the following raw material components in parts by weight:
Figure BDA0002690192110000092
wherein, the diisocyanate consists of isophorone diisocyanate and p-phenylene diisocyanate according to the weight ratio of 85:15, the hydroxyl value of the polyethylene adipate polyol is 50KOH/g, and the number average molecular weight is 2000.
The preparation method of the environment-friendly TPU film comprises the following steps:
(1) mixing poly adipic acid hexanediol ester polyol, trifluoroethylene-vinyl ether-vinyl ester copolymer and polyvinyl acetal, and dehydrating for 2 hours under the vacuum condition of 0.04 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 130 ℃, the temperature of a mixing section to be 150 ℃, the temperature of an extrusion section to be 200 ℃, the temperature of a machine head to be 150 ℃, and extruding while reacting to form TPU particles;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, internally mixing for 25min at 180 ℃, and then pressing into a film at 165 ℃ to obtain the environment-friendly TPU film.
Example 5:
the embodiment provides an environment-friendly TPU film for a table mat, which comprises the following raw material components in parts by weight:
Figure BDA0002690192110000101
wherein the polyoxypropylene polyol has a hydroxyl value of 80KOH/g and a number average molecular weight of 2000.
The preparation method of the environment-friendly TPU film comprises the following steps:
(1) mixing polyoxypropylene polyalcohol, trifluoroethylene-vinyl ether-vinyl ester copolymer and polyvinyl acetal, and dehydrating for 1.8h under the vacuum condition of 0.065 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 120 ℃, the temperature of a mixing section to be 160 ℃, the temperature of an extrusion section to be 190 ℃, the temperature of a machine head to be 200 ℃, and extruding while reacting to form TPU particles;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, internally mixing for 35min at 220 ℃, and then rolling and forming a film at 180 ℃ to obtain the environment-friendly TPU film.
Example 6:
the embodiment provides an environment-friendly TPU film for a table mat, which comprises the following raw material components in parts by weight:
Figure BDA0002690192110000111
wherein the hydroxyl value of the polyethylene adipate polyol is 57KOH/g, and the number average molecular weight is 3400.
The preparation method of the environment-friendly TPU film comprises the following steps:
(1) mixing polyoxypropylene polyol, trifluoroethylene-vinyl ether-vinyl ester copolymer and polyvinyl acetal, and dehydrating for 1.6h under the vacuum condition of 0.095 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 115 ℃, the temperature of a mixing section to be 155 ℃, the temperature of an extrusion section to be 175 ℃, and the temperature of a machine head to be 190 ℃, and extruding while reacting to form TPU particles;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, internally mixing for 20min at 195 ℃, and then rolling to form a film at 175 ℃ to obtain the environment-friendly TPU film.
Comparative example 1
The difference from example 2 is that the weight part of trifluoroethylene-vinyl ether-vinyl ester copolymer is 2 parts, and the rest is the same as example 2.
Comparative example 2
The difference from example 3 is that the weight part of trifluoroethylene-vinyl ether-vinyl ester copolymer is 15 parts, and the rest is the same as example 3.
Comparative example 3
The difference from example 4 is that the polyvinyl butyral has a weight fraction of 15 parts, which is otherwise the same as in example 4.
Comparative example 4
The difference from example 5 is that the polyvinyl butyral has a weight ratio of 35 parts, and the rest is the same as example 5.
The TPU films provided in the above examples and comparative examples were tested for their performance, with the following test criteria:
stain resistance: testing the anti-contamination performance of the TPU film to an oil marking pen according to the specification of JGT 304-2011 standard; grade 1 indicates that the cleaning agent can be removed by dry lint-free cotton cloth, grade 2 indicates that the cleaning agent can be removed by 1% neutral water-based weak cleaning agent, grade 3 indicates that the cleaning agent can be removed by orange-based cleaning agent, grade 4 indicates that the cleaning agent can be removed by absolute ethyl alcohol, and the 'unremovable' indicates that the four cleaning materials can not be removed or the materials are discolored or damaged due to light loss after cleaning;
dry friction coefficient of static friction: the test was carried out according to the method of GB/T3903.6-2005.
The results of the above property tests are shown in table 1 below:
TABLE 1
Figure BDA0002690192110000121
Figure BDA0002690192110000131
The results in table 1 show that the TPU film provided by the invention has a level 1 stain resistance, a dry friction coefficient of static friction of 1-1.2, good stain resistance and adhesiveness, no volatile organic substances, safety and environmental protection, and is suitable for being used in table mat products.
In comparative example 1, the amount of thermosetting fluorocarbon resin used was too small compared to example 2, and the resulting TPU film had an improved coefficient of friction and better adhesion, but had significantly reduced stain resistance. Compared with example 3, the excessive amount of thermosetting fluorocarbon resin used in comparative example 2 results in lower surface tension of the TPU film, significantly lower friction coefficient, and poor adhesion.
In comparative example 3, the coefficient of friction of the TPU film was lower and the adhesion was poor, compared to example 4, because the polyvinyl butyral was added in an excessively small amount. Compared with example 5, the addition amount of the polyvinyl butyral in comparative example 4 is too much, which causes the surface of the TPU film to be sticky, oil stains are easily adsorbed, and the anti-stain property is poor.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (17)

1. The environment-friendly TPU film for the table mat is characterized by comprising the following raw materials in parts by weight:
20-30 parts of diisocyanate, 80-100 parts of oligomer polyol, 5-10 parts of thermosetting fluorocarbon resin, 20-30 parts of polyvinyl butyral, 4-8 parts of chain extender and 0.1-1 part of catalyst;
the oligomer polyol is polyether polyol and/or polyester polyol;
the hydroxyl value of the polyether polyol is 75-80mg KOH/g, and the number average molecular weight is 1000-2000;
the hydroxyl value of the polyester polyol is 50-60mg KOH/g, and the number average molecular weight is 2000-4000;
the thermosetting fluorocarbon resin is trifluoroethylene-vinyl ether-vinyl ester copolymer.
2. The TPU film of claim 1 wherein the diisocyanate is an aliphatic diisocyanate and/or an aromatic diisocyanate.
3. The TPU film of claim 2 wherein the diisocyanate has an aliphatic diisocyanate content of greater than 80 weight percent.
4. The TPU film of claim 2, wherein the aliphatic diisocyanate is selected from the group consisting of one or a combination of at least two of hexamethylene diisocyanate, cyclohexanedimethylene diisocyanate, and isophorone diisocyanate.
5. The TPU film of claim 2 wherein the aromatic diisocyanate is selected from one or a combination of at least two of toluene diisocyanate, diphenylmethane diisocyanate, p-phenylene diisocyanate, or naphthalene diisocyanate.
6. The TPU film of claim 1 or 2 wherein the polyether polyol is selected from one or a combination of at least two of polyoxyethylene polyol, polyoxypropylene polyol, polytetrahydrofuran polyol.
7. The TPU film of claim 1 wherein the polyester polyol is selected from one or a combination of at least two of polycaprolactone polyol, polyhexamethylene adipate polyol, polyethylene adipate polyol, polycarbonate polyol.
8. The TPU film of claim 1 wherein the chain extender is selected from one or a combination of at least two of 1, 4-butanediol, 1, 6-hexanediol, diethylene glycol, diethylaminoethanol, N-dihydroxy (diisopropyl) aniline, ethylenediamine, 3 '-dichloro-4, 4' diamino-diphenylmethane.
9. The TPU film of claim 1 wherein the catalyst is selected from the group consisting of triethanolamine, N-methylmorpholine, N' -dimorpholinyldiethylether, tetra N-butyltin, stannous chloride, stannous octoate, dibutyl tin dilaurate, or combinations of at least two thereof.
10. The TPU film of claim 1 further comprising 8 to 15 parts flame retardant.
11. The TPU film of claim 10 wherein the flame retardant is selected from one or a combination of at least two of melamine, melamine cyanuric acid, melamine phosphate, triphenyl phosphate, tris (β -chloroethyl) phosphate, tris (β -chloropropyl) phosphate, tris (2, 3-dichloropropyl) phosphate, polyphosphate.
12. A process for the preparation of the TPU film of any of claims 1-11 comprising the steps of:
(1) dehydrating and mixing the oligomer polyol, the thermosetting fluorocarbon resin and the polyvinyl acetal;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, and extruding while reacting to form TPU particles;
(3) banburying the TPU particles obtained in the step (2) through a mixer, and then rolling to form a film to obtain the TPU film.
13. The method according to claim 12, wherein the dehydration in step (1) is performed under vacuum.
14. The method as claimed in claim 12, wherein the temperature of the feeding section of the twin-screw extruder in step (2) is 100-.
15. The method as claimed in claim 12, wherein the temperature for banburying in step (3) is 180-220 ℃ for 20-40 min.
16. The production method as claimed in claim 12, wherein the temperature of the rolling in the step (3) is 150-180 ℃.
17. The method of manufacturing according to claim 12, comprising the steps of:
(1) mixing oligomer polyol, thermosetting fluorocarbon resin and polyvinyl acetal, and dehydrating for 1-2 hours under the vacuum condition of-0.085 to-0.095 MPa;
(2) adding the mixed solution obtained in the step (1) and other raw material components into a double-screw extruder, controlling the temperature of a feeding section of the double-screw extruder to be 100-;
(3) and (3) adding the TPU particles obtained in the step (2) into an internal mixer, carrying out internal mixing at the temperature of 180 ℃ and 220 ℃ for 20-40min, and then rolling at the temperature of 150 ℃ and 180 ℃ to form a film to obtain the TPU film.
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