CN116987376A - Thermoplastic elastomer for photochromic automobile protective film and preparation method thereof - Google Patents

Thermoplastic elastomer for photochromic automobile protective film and preparation method thereof Download PDF

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CN116987376A
CN116987376A CN202311239519.0A CN202311239519A CN116987376A CN 116987376 A CN116987376 A CN 116987376A CN 202311239519 A CN202311239519 A CN 202311239519A CN 116987376 A CN116987376 A CN 116987376A
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thermoplastic elastomer
protective film
photochromic material
photochromic
parts
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CN116987376B (en
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李玉清
杨洪治
张朝勇
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Hebei Shulaimeide Plastic Film Material Technology Co ltd
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Hebei Shulaimeide Plastic Film Material Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • C08K2003/2258Oxides; Hydroxides of metals of tungsten
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/16Applications used for films
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00Properties characterising the ingredient of the composition
    • C08L2207/04Thermoplastic elastomer

Abstract

The invention relates to the technical field of high polymer materials, and provides a thermoplastic elastomer for a photochromic automobile protective film and a preparation method thereof. The thermoplastic elastomer for the photochromic automobile protective film comprises the following components in parts by mass: 100 parts of TPU, 5-15 parts of inorganic photochromic material, 1-3 parts of lubricant and 0.5-1.5 parts of antioxidant; the inorganic photochromic material comprises a silane coupling agent modified inorganic photochromic material and a PMMA modified inorganic photochromic material; the preparation method of the thermoplastic elastomer for the photochromic automobile protective film comprises the steps of mixing and melting the components in parts by mass, and extruding and granulating to obtain the thermoplastic elastomer for the photochromic automobile protective film. By the technical scheme, the problems of poor compatibility of the inorganic photochromic material and the high polymer material and uneven dispersion in the high polymer material in the prior art are solved.

Description

Thermoplastic elastomer for photochromic automobile protective film and preparation method thereof
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a thermoplastic elastomer for a photochromic automobile protective film and a preparation method thereof.
Background
Along with the development of science and technology and the improvement of living standard of people, automobiles are gradually popular in the life of people, the demands of people on automobile protective films are gradually changed from practicability into diversity and functionality, and a photochromic film is a functional material capable of reversibly changing color along with the change of external illumination, can meet the demands of people on diversity and functionality, and is widely applied to the field of automobile protective films.
At present, the photochromic automobile protective film is prepared by coating a photochromic substance on the surface of a base film, and the problems of low rate of color change reaction, short color change duration, poor thermal stability, easy detachment of photochromic powder and the like exist in the process by utilizing the principle that the color of the photochromic substance is reversibly changed after the photochromic substance absorbs visible light and ultraviolet light under the irradiation of sunlight. Therefore, more preparation processes are used in actual production, namely, photochromic substances and high polymer materials are physically blended and then molded to prepare the photochromic automobile protective film.
Photochromic substances can be classified into organic photochromic materials and inorganic photochromic materials, and inorganic photochromic materials have many characteristics superior to organic photochromic materials, such as rapid rate of color change reaction, strong aging resistance, long duration of color change, good thermal stability, etc., but inorganic photochromic materials are usually metal oxides such as tungsten oxide (WO 3 ) Molybdenum trioxide (MoO) 3 ) And the like, the compatibility of the metal oxide and the high polymer material and the dispersibility of the metal oxide in the high polymer material are technical problems which are difficult to solve, and when the compatibility of the inorganic photochromic material and the high polymer material is poor and the dispersion in the high polymer material is uneven, the light transmittance and the mechanical strength of the automobile protective film are reduced.
Disclosure of Invention
The invention provides a thermoplastic elastomer for a photochromic automobile protective film and a preparation method thereof, which solve the problems of poor compatibility of inorganic photochromic materials and high polymer materials and uneven dispersion in the high polymer materials in the related technology.
The technical scheme of the invention is as follows:
the thermoplastic elastomer for the photochromic automobile protective film comprises the following components in parts by mass: 100 parts of TPU, 5-15 parts of inorganic photochromic material, 1-3 parts of lubricant and 0.5-1.5 parts of antioxidant;
the inorganic photochromic material comprises a silane coupling agent modified inorganic photochromic material and a PMMA modified inorganic photochromic material.
As a further technical scheme, the mass ratio of the silane coupling agent modified inorganic photochromic material to the PMMA modified inorganic photochromic material is 1:0.25-1.5.
As a further technical scheme, the mass ratio of the silane coupling agent modified inorganic photochromic material to the PMMA modified inorganic photochromic material is 3:2.
As a further technical scheme, the silane coupling agent modified inorganic photochromic material is prepared by the following method: adding the ethanol-water solution of the silane coupling agent into the inorganic photochromic material while stirring, continuously stirring, separating and drying to obtain the silane coupling agent modified inorganic photochromic material.
As a further technical scheme, the mass concentration of the silane coupling agent in the ethanol-water solution of the silane coupling agent is 5-10%.
As a further technical scheme, the mass ratio of the inorganic photochromic material to the silane coupling agent is 20:1.
As a further technical scheme, the silane coupling agent modified inorganic photochromic material comprises one or more of KH560 modified inorganic photochromic material, KH550 modified inorganic photochromic material and KH570 modified inorganic photochromic material.
As a further technical scheme, the silane coupling agent modified inorganic photochromic material comprises one or more of KH560 modified inorganic photochromic material and KH550 modified inorganic photochromic material.
As a further technical scheme, the silane coupling agent modified inorganic photochromic material is KH560 modified inorganic photochromic material.
As a further technical scheme, the preparation method of the PMMA modified inorganic photochromic material comprises the following steps:
s1, adding an ethanol-water solution of a coupling agent into an inorganic photochromic material while stirring, continuously stirring, separating and drying to obtain a double bond modified inorganic photochromic material;
s2, mixing the double bond modified inorganic photochromic material obtained in the step S1 with an emulsifying agent, a buffering agent, an initiator and water, heating, adding MMA, and reacting to obtain the PMMA modified inorganic photochromic material.
As a further technical scheme, the coupling agent in S1 comprises one or two of triacetoxy vinyl silane and vinyl methyl silicon (glycol) diacetate.
As a further technical scheme, the coupling agent in the S1 is triacetoxy vinyl silane.
As a further technical scheme, the mass ratio of the inorganic photochromic material to the coupling agent in the S1 is 20:1.
As a further technical scheme, the lubricant comprises one or more of methyl silicone oil, ethyl silicone oil and benzyl silicone oil;
the antioxidant comprises one or more of antioxidant 1010, antioxidant 264 and antioxidant 1076.
As a further technical scheme, the inorganic photochromic material comprises WO 3 、MoO 3 One or more of them.
The invention also provides a preparation method of the thermoplastic elastomer for the photochromic automobile protective film, which comprises the steps of mixing and melting the components in parts by mass, and extruding and granulating to obtain the thermoplastic elastomer for the photochromic automobile protective film.
The invention also provides an application of the thermoplastic elastomer for the photochromic automobile protective film or the thermoplastic elastomer for the photochromic automobile protective film prepared by the preparation method in the automobile protective film.
The working principle and the beneficial effects of the invention are as follows:
1. according to the invention, the silane coupling agent is used for modifying the inorganic photochromic material and the PMMA modified inorganic photochromic material to be matched, so that the aggregation of the inorganic photochromic material is eliminated, the inorganic photochromic material is uniformly dispersed into the high polymer material, the compatibility of the inorganic photochromic material and the high polymer material is improved, and the tensile strength and the light transmittance of the thermoplastic elastomer are improved.
2. According to the invention, KH560 modified inorganic photochromic material and PMMA modified inorganic photochromic material with the mass ratio of 1:0.25-1.5 are used, so that the tensile strength and the light transmittance of the thermoplastic elastomer are further improved.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a graph of water contact angle measurements of films made from the thermoplastic elastomer material of example 1 of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The volume ratio of ethanol to water in the ethanol-water solution in the following examples and comparative examples was 1:1.
Example 1
S1, preparation of KH560 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH560 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH560 modified WO 3 ,WO 3 The mass ratio of KH560 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Placing into a stirrer, stirring while addingAdding 8wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 6 parts of KH560 into WO 3 PMMA modified WO 4 parts 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Example 2
S1, preparation of KH560 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH560 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH560 modified WO 3 ,WO 3 The mass ratio of KH560 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 8 parts of KH560 into WO 3 2 parts of PMMA modified WO 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, and transferring to double snailsIn a rod extruder, the thermoplastic elastomer material is obtained by melt extrusion and pelletization at 190 ℃.
Example 3
S1, preparation of KH560 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH560 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH560 modified WO 3 ,WO 3 The mass ratio of KH560 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 4 parts of KH560 into WO 3 PMMA modified WO 6 parts 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Example 4
S1, preparation of KH550 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH550 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH550 modified WO 3 ,WO 3 The mass ratio of KH550 to KH550 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 6 parts of KH550 into WO 3 PMMA modified WO 4 parts 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Example 5
S1, preparation of KH570 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH570 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH570 modified WO 3 ,WO 3 The mass ratio of KH570 to KH570 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 6 parts of KH570 into WO 3 PMMA modified WO 4 parts 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Example 6
S1, preparing KH560Modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH560 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH560 modified WO 3 ,WO 3 The mass ratio of KH560 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding ethanol-water solution of 8wt% vinyl methyl silicon (glycol) diacetate, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain vinyl methyl silicon (glycol) diacetate modified WO 3 ,WO 3 The mass ratio of the vinyl methyl silicon (glycol) diacetate to the vinyl methyl silicon (glycol) diacetate is 20:1; 10g of vinyl methyl silicon (diol) diacetate modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 6 parts of KH560 into WO 3 PMMA modified WO 4 parts 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Example 7
S1, preparing KH560 modified MoO 3 : moO is carried out 3 Adding into a stirrer, stirring while adding 5wt% KH560 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH560 modified MoO 3 ,MoO 3 The mass ratio of KH560 is 20:1;
s2, preparing PMMA modified MoO 3 : moO is carried out 3 Adding into a stirrer, stirring while adding 5wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified MoO 3 ,MoO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified MoO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified MoO 3
S3, modifying 100 parts of TPU and 3 parts of KH560 into MoO 3 2 parts of PMMA modified MoO 3 Mixing 1 part of ethyl silicone oil and 0.5 part of antioxidant 1076 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Example 8
S1, preparation of KH560 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 10wt% KH560 ethanol-water solution, stirring at 30deg.C for 24 hr, separating solid and liquid, washing with ethanol solution for 2 times, and drying to obtain KH560 modified WO 3 ,WO 3 The mass ratio of KH560 is 20:1;
s2, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 10wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S3, modifying 100 parts of TPU and 9 parts of KH560 into WO 3 PMMA modified WO 6 parts 3 Mixing 3 parts of benzyl silicone oil and 1.5 parts of antioxidant 264 uniformly in a mixer, transferring into a double-screw extruder, carrying out melt extrusion at 190 ℃, and granulating to obtain the thermoplastic elastomer material.
Comparative example 1
S1, preparation of KH560 modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% KH560 ethanol-water solution, stirring at 30deg.C for 24After h, solid-liquid separation, washing 2 times with ethanol solution, drying to obtain KH560 modified WO 3 ,WO 3 The mass ratio of KH560 is 20:1;
s2, 100 parts of TPU and 10 parts of KH560 are modified to WO 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Comparative example 2
S1, preparing PMMA modified WO 3 : WO is incorporated into 3 Adding into a stirrer, stirring while adding 8wt% of ethanol-water solution of triacetoxy vinyl silane, stirring at 30deg.C for 24 hr, separating solid from liquid, washing with ethanol solution for 2 times, and drying to obtain triacetoxy vinyl silane modified WO 3 ,WO 3 The mass ratio of the catalyst to the triacetoxy vinylsilane is 20:1; 10g of triacetoxyvinylsilane modified WO 3 Putting 0.5g of sodium dodecyl benzene sulfonate, 3g of sodium bicarbonate, 0.5g of ammonium persulfate and 1L of water into a three-neck flask, heating to 75 ℃, adding 20g of MMA to react for 5 hours, cooling at room temperature, performing solid-liquid separation, washing, and drying to obtain PMMA modified WO 3
S2, modifying 100 parts of TPU and 10 parts of PMMA to WO 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Comparative example 3
100 parts of TPU, 10 parts of WO 3 Mixing 2 parts of methyl silicone oil and 1 part of antioxidant 1010 uniformly in a mixer, transferring into a double-screw extruder, and carrying out melt extrusion and granulation at 190 ℃ to obtain the thermoplastic elastomer material.
Performance test:
(1) The thermoplastic elastomer materials obtained in examples 1 to 8 and comparative examples 1 to 3 were referred to GB/T1040.1-2018 "determination of Plastic tensile Properties part 1: testing tensile strength by a method of general rule;
(2) The thermoplastic elastomer materials obtained in examples 1 to 8 and comparative examples 1 to 3 were hot-pressed into films 1mm thick, and the transmittance was measured by using an ultraviolet-visible near-infrared spectrophotometer Cary 5000, and calculated according to the following formula;
light transmittance T (%) = (T) 555 +T 700 +T 900 )÷3
The results are recorded in table 1.
TABLE 1 tensile Strength and light transmittance of thermoplastic elastomer materials
As can be seen from Table 1, the thermoplastic elastomer material provided by the invention has tensile strength of more than 50.2MPa, light transmittance of more than 74.6%, and good mechanical strength and light transmittance.
Example 1 KH560 modified WO used in example 1 compared with comparative examples 1 to 3 3 And PMMA modified WO 3 KH560 modified WO in comparative example 1 3 Modification of WO with PMMA in comparative example 2 3 No WO is available in comparative example 3 3 The tensile strength and transmittance of the modified thermoplastic elastomer material obtained in example 1 were higher than those of comparative examples 1 to 3, indicating that WO was modified with KH560 3 And PMMA modified WO 3 The inorganic photochromic material can be uniformly dispersed into the high polymer material by matching, and meanwhile, the compatibility of the inorganic photochromic material and the high polymer material is improved, so that the tensile strength and the light transmittance of the thermoplastic elastomer are greatly improved.
The thermoplastic elastomer material obtained in example 1 was hot-pressed into a film having a thickness of 1mm, and the water contact angle was measured by a water contact angle tester, and the measurement results are shown in FIG. 1.
As can be seen from fig. 1, the water contact angle of the thermoplastic elastomer material provided in embodiment 1 of the present invention reaches 117.2 °, and the water contact angle of the thermoplastic elastomer material obtained in other embodiments is similar to that of embodiment 1, so that the thermoplastic elastomer materials obtained in embodiments 1 to 8 of the present invention can achieve a good self-cleaning effect when applied to an automobile protective film during rain washing.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. The thermoplastic elastomer for the photochromic automobile protective film is characterized by comprising the following components in parts by mass: 100 parts of TPU, 5-15 parts of inorganic photochromic material, 1-3 parts of lubricant and 0.5-1.5 parts of antioxidant;
the inorganic photochromic material comprises a silane coupling agent modified inorganic photochromic material and a PMMA modified inorganic photochromic material.
2. The thermoplastic elastomer for a photochromic automobile protective film according to claim 1, wherein the mass ratio of the silane coupling agent modified inorganic photochromic material to the PMMA modified inorganic photochromic material is 1:0.25-1.5.
3. The thermoplastic elastomer for a photochromic automobile protective film according to claim 1, wherein said silane coupling agent modified inorganic photochromic material is prepared by the following method: adding the ethanol-water solution of the silane coupling agent into the inorganic photochromic material while stirring, continuously stirring, separating and drying to obtain the silane coupling agent modified inorganic photochromic material.
4. The thermoplastic elastomer for a photochromic automotive protective film according to claim 3, wherein the mass concentration of the silane coupling agent in the ethanol-water solution of the silane coupling agent is 5 to 10%.
5. The thermoplastic elastomer for a photochromic automobile protective film according to claim 1, wherein said silane coupling agent modified inorganic photochromic material comprises one or more of KH560 modified inorganic photochromic material, KH550 modified inorganic photochromic material, KH570 modified inorganic photochromic material.
6. The thermoplastic elastomer for a photochromic automobile protective film according to claim 1, wherein said method for preparing a PMMA modified inorganic photochromic material comprises the steps of:
s1, adding an ethanol-water solution of a coupling agent into an inorganic photochromic material while stirring, continuously stirring, separating and drying to obtain a double bond modified inorganic photochromic material;
s2, mixing the double bond modified inorganic photochromic material obtained in the step S1 with an emulsifying agent, a buffering agent, an initiator and water, heating, adding MMA, and reacting to obtain the PMMA modified inorganic photochromic material.
7. The thermoplastic elastomer for a photochromic automotive protective film of claim 6 wherein the coupling agent in S1 comprises one or both of triacetoxy vinyl silane, vinyl methyl silicon (diol) diacetate.
8. The thermoplastic elastomer for a photochromic automobile protective film according to claim 1, wherein said lubricant comprises one or more of methyl silicone oil, ethyl silicone oil, benzyl silicone oil;
the antioxidant comprises one or more of antioxidant 1010, antioxidant 264 and antioxidant 1076.
9. The method for producing a thermoplastic elastomer for a photochromic automotive protective film according to any one of claims 1 to 8, wherein the thermoplastic elastomer for a photochromic automotive protective film is obtained by mixing and melting the components in parts by mass and then extruding and granulating the mixture.
10. The thermoplastic elastomer for a photochromic automobile protective film according to any one of claims 1 to 8 or the use of the thermoplastic elastomer for a photochromic automobile protective film prepared by the preparation method according to claim 9 in an automobile protective film.
CN202311239519.0A 2023-09-25 2023-09-25 Thermoplastic elastomer for photochromic automobile protective film and preparation method thereof Active CN116987376B (en)

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