CN112778506B - Transparent high polymer material and preparation method and application thereof - Google Patents

Transparent high polymer material and preparation method and application thereof Download PDF

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CN112778506B
CN112778506B CN202011547289.0A CN202011547289A CN112778506B CN 112778506 B CN112778506 B CN 112778506B CN 202011547289 A CN202011547289 A CN 202011547289A CN 112778506 B CN112778506 B CN 112778506B
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毛丽娟
孙洁
刘树柏
宋金鸽
丁轶凡
陈俊
赵成世
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Shaoxing Ruikang Biotechnologes Co inc
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16Dicarboxylic acids and dihydroxy compounds
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    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
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    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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Abstract

The invention relates to a low-conjugation transmissibility and low-toxicity high-molecular transparent material, a high-polymerization-degree high-hardness transparent high-polymer product obtained by catalytic condensation of the high-molecular transparent material, and a preparation method and application of the high-polymerization-degree high-hardness transparent high-polymer product. The invention aims to design and synthesize a low-toxicity transparent high polymer material with low or no visible light interference, and selects, optimizes and screens a catalyst suitable for condensation polymerization. The method is characterized in that isophthalic acid or dimethyl isophthalate is used as one of conjugated hindered monomers for the first time, another aliphatic diol without conjugation property and with certain controllable rigidity and diol containing cyclohexyl are selected as diol monomers to synthesize the transparent polyester polymer material, and the purpose is to reduce visible light interference phenomenon as much as possible, ensure low toxicity and controllable hardness, and meet the physical property requirement of the transparent material under the application of specific temperature. To achieve this goal, all possible effective and smooth conjugation is first avoided, while non-toxic monomers, low-toxicity catalysts and certain controlled rigidity monomers are selected.

Description

Transparent high polymer material and preparation method and application thereof
Technical Field
The invention relates to a low-conjugation transmission degree and low-toxicity high-molecular transparent material, a catalytic condensation high-polymerization degree and high-hardness transparent high polymer product, and a preparation method and application thereof.
Background
Transparent high molecular materials are widely applied in the fields of optical components, packaging, buildings, medical supplies, optical fibers, optical disc materials, daily necessities and the like, and the material has the characteristic that the light transmittance in daily light reaches more than 80%.
The following classes of transparent polymer materials exist so far:
(1) polycarbonate resin
The transparency of Polycarbonate (PC) can reach 89%, the haze is 1%, the product has good dimensional stability and high mechanical property, and can be used for a long time at the temperature of 135 ℃. Polycarbonates have the disadvantage of low surface hardness, are not resistant to abrasion, yellow on exposure to ultraviolet light or radiation, and, in addition, have a higher birefringence than PMMA and glass. Several PC manufacturers develop new PC optical disc varieties by improving the melt fluidity, optical purity, birefringence reduction and the like of PC, such as Calibre 080PC resin produced by Dow plastic company by adopting a continuous synthesis process, wherein the MFI is 80g/10 min. Makrolon DP1-1265 from Bayer, which has a melt flow rate of 75g/lOmin, improves PC to meet DVD product performance requirements.
The typical chemical structure of the polycarbon is:
Figure BDA0002856053090000011
(2) thermoplastic polyester
Polyethylene terephthalate (PET) is a transparent polymer material, and PET films are widely used for transparent packaging materials for various products, and have a disadvantage of poor heat resistance. The improved transparent polymer material developed by Eastman of the united states is amorphous polyester PETG, which is developed rapidly by substituting a part of ethylene glycol with cyclohexane dimethanol (CHDM) to retard crystallization thereof, resulting in a transparent material having excellent weather resistance and impact resistance, excellent processability and low cost. PETG does not have the drawback of being hygroscopic like PC and acrylic resins and will therefore be a strong competitor to other transparent materials. In addition, the new generation of transparent materials developed by Eastman is known as Tritan Copolyester, which is a Copolyester obtained by polycondensation of terephthalic acid with tetramethylcyclobutanediol (CBDO), cyclohexanediol. Tritan (fig. 1 shows rainbow interference generated by PC and Tritan transparent materials, and the comparison of visible light interference between two transparent materials in fig. 1 shows that PC has severe visible light interference, and Tritan transparent materials show little visible light interference, on the contrary.) contains no bisphenol a, has passed FDA certification in the united states, and has been adopted by partially lotto, nikk products.
Typical chemical structure of heat shrinkable polyester:
Figure BDA0002856053090000021
(3) free radical polymerization type acrylate
The polymethacrylate is transparent plastic appearing as early as 30 years, and has light transmittance of more than 92%, haze of 0.2%, and good mechanical property and processability. The optical fiber is used as the material of airplane cabin window glass, optical lens, optical fiber core material, building skylight, decorative plate, optical disk and the like. Its disadvantages are low heat resistance, poor toughness, and the occurrence of crazes and cracks during use. Other monomers are introduced to be copolymerized with the methyl methacrylate, so that a novel transparent material can be prepared, and the performance of the methyl methacrylate homopolymer can be improved. The heat distortion temperature can be increased when methyl acrylate or ethyl acrylate is introduced into the molecule, the heat distortion temperature of the improved PMMA is increased from 100 ℃ to 127 ℃, and the melt fluidity of the copolymer is improved along with the increase of the content of methyl acrylate or ethyl acrylate monomer in the molecular structure. The copolymer (MBS) of methyl methacrylate, butadiene and styrene is a transparent material with high impact toughness, and the impact toughness and the transparency are improved after the MBS is blended with polyvinyl chloride. The strength of the HP multi-component blend sheet material which is introduced by the American Cyro company is 10 times higher than that of general acrylic resin, and the cost is low, so that the HP multi-component blend sheet material is used as a substitute of a polycarbonate transparent material.
Typical chemical structure of free radical polymerization polyester:
Figure BDA0002856053090000031
(4) polystyrene
Polystyrene is also a high polymer material with high transparency, has light transmittance of 90 percent, refractive index of 1.60 and low water absorption, and can be used for manufacturing optical parts. However, it has low surface hardness and high brittleness, and is liable to cause crazing (Craze) and cracking, thereby limiting the range of applications. The SBS is a styrene-butadiene block copolymer, a corresponding product of the SBS has transparent K glue, the SBS can be used for injection molding of parts, extrusion, film drawing and other applications, the light transmittance is over 90 percent, the haze is 0.1-1.2 percent, the density is small, the water absorption is low, and the impact toughness is slightly higher than that of polystyrene, AS copolymer and PMMA. The Asahi chemical company develops a transparent high-impact PS through graft modification, the PS is similar to HIPS, the impact property and the transparency of the material are balanced, the refractive index of the resin can be adjusted through copolymerization of styrene, methacrylate and acrylate comonomer ratios, and the resin has the transparency, strength and printability required by shrink external packaging.
(5) Polyolefin transparent material
Atactic polypropylene is a highly transparent material with appropriate stiffness, and has been used in large quantities for disposable syringes and the like. With the application of metallocene catalysts in polyolefin production, various properties of polyethylene and polypropylene products are greatly improved. Several large companies in succession have developed metallocene-catalyzed polyethylene (mPE) and polypropylene (mPP) products of high strength and high clarity. The high transparent thermoplastic resin Topos series amorphous cycloolefin copolymer is produced by copolymerization reaction of ethylene and norbornene under the catalysis of metallocene catalyst and is mainly applied to electronic, medicine package and optical disc package film. Compared with the traditional PP, the PP produced by the M Novolen metallocene catalyst reported by BASF has higher toughness and obviously improved transparency. The light transmittance of the homopolymerized PPH reaches 93 percent, and the light transmittance of the random copolymerization PPC reaches 96 percent. The metallocene PP has good transparency and other properties are obviously improved.
(6) Nylon transparent material
The transparent nylon has the characteristics of good light transmittance which can reach 90 percent, and better transparency than polycarbonate which is close to polymethyl methacrylate (PMMA). In addition, the composite material has good thermal stability, impact toughness, electrical insulation, dimensional stability and aging resistance, corrosion resistance, wear resistance, scratch resistance and the like, low odor and toxicity, dilute acid resistance, alkali resistance, aliphatic hydrocarbon/aromatic hydrocarbon/ester/ether/oil and fat resistance, alcohol resistance and environmental stress cracking resistance, and is superior to polycarbonate and polymethyl methacrylate. The transparent nylon has a water absorption of 0.41% which is lower than that of nylon 6 and nylon 66, and this water absorption hardly affects its mechanical and electrical properties. The automobile air conditioner is widely applied to automobile electronic and electric appliances, lighting, cooling and air conditioning systems, oil circuit systems, power systems, automobile body chassis, interior trims and oil cups; electrical equipment, connectors, lighting, optical instruments and computer parts, surveillance windows for industrial production, X-ray instruments' sight windows, metering instruments, xerographic developer reservoirs, cell phones and other portable devices. It can also be used in industrial heating systems, household goods, food packaging, hydraulic and pneumatic, mechanical engineering, medical goods, transmission, bathroom, water and gas supply, sports and consumer goods, tools and parts; the liquid crystal display device is also widely applied to lenses, optical components, safety glasses, sunglasses, containers of lens frames contacting with petroleum, oil filters, butane lighter of oil storage depots, windows of oil meters and the like.
The transparent nylon has the defects that the transparent nylon is very easy to generate light-induced yellowing and absorb water, the dimensional stability and the electrical property are influenced when the water absorption is high to a certain degree, and the mechanical strength of the plastic is also greatly reduced when the water absorption is high. The technical requirements of the antistatic nylon injection molding are strict, the existence of trace moisture can cause damage to the molding quality, and the uneven wall thickness can cause the distortion and deformation of a workpiece; the requirement on the precision of equipment is high during the post-processing of the finished piece.
Disclosure of Invention
The invention hopes to provide a more green and environment-friendly polyester transparent high polymer material and a preparation method and application thereof, and the specific scheme is as follows:
a transparent polymer material has the following structural formula:
Figure BDA0002856053090000051
the product is obtained by condensation polymerization operation with dimethyl isophthalate as a monomer raw material.
Starting stirring under the protection of nitrogen, adding 1, 4-cyclohexanedimethanol, dimethyl isophthalate, titanate organic tin composite catalyst and condensation polymerization high-temperature stabilizer phosphoric acid or triphenyl phosphate into a reaction bottle, vacuumizing to 5-25mmHg, then heating to 80-95 ℃, and controlling the stirring speed to avoid wall splashing; reacting at 80-95 ℃ for 1-3 hours, and distilling off a methanol by-product; heating to 110-135 deg.c and stirring for 3-5 hr to evaporate out methanol as side product fast; heating to 170-190 ℃ for reaction for 4-6 hours, continuing heating to 200-230 ℃ for reaction for 3-8 hours, gradually stopping stirring in the temperature range, and keeping the temperature for 2-5 hours to obtain the product.
The product is obtained by condensation polymerization operation with isophthalic acid as a monomer raw material.
Starting stirring under the protection of nitrogen, adding 1, 4-cyclohexanedimethanol, isophthalic acid, titanate organic tin composite catalyst and condensation polymerization high-temperature stabilizer phosphoric acid or triphenyl phosphate into a reaction bottle, vacuumizing to 5-25mmHg, then heating to 110-130 ℃, and controlling the stirring speed at the condition of no wall splashing phenomenon; reacting at 110-130 deg.C for 2-3 h, heating to 150-185 deg.C, stirring for 4-7 h, and evaporating the by-product; heating to 210-235 ℃ for reaction for 4-8 hours, continuing heating to 250-270 ℃ for reaction for 3-10 hours, gradually stopping stirring in the temperature range, and keeping the temperature for 2-5 hours to obtain the product.
The innovative transparent material can be used for outdoor high-weather-resistance transparent plates or electronic screen related materials and the like, such as stadium top plates, overhead sound insulation transparent plate materials and electronic advertisement screens.
The invention aims to design and synthesize a low-toxicity transparent high polymer material with low visible light interference or without visible light interference, and selects, optimizes and screens a catalyst suitable for condensation polymerization. The method is characterized in that isophthalic acid or dimethyl isophthalate is used as one of conjugated hindered monomers for the first time, another aliphatic diol without conjugation property and with certain controllable rigidity and diol containing cyclohexyl are selected as diol monomers to synthesize the transparent polyester polymer material, and the transparent polyester polymer material aims to reduce visible light interference phenomena as much as possible, ensure low toxicity and controllable hardness, and meet the physical property requirements of the transparent material under the application of specific temperature. To achieve this goal, all possible effective and smooth conjugation is first avoided, while non-toxic monomers, low-toxicity catalysts and certain controlled rigidity monomers are selected.
The invention designs the low-conjugation transmission degree and low-toxicity transparent high polymer material, designs and optimizes the organic metal catalyst, achieves high-temperature condensation polymerization, and forms the high-polymerization degree and high-hardness transparent high polymer material. And provides a novel synthetic low-conjugation transmission degree and low-toxicity polyester transparent material, and provides more opportunities and choices for low-degree visible light interference or non-transparent materials. Can provide a more green and environment-friendly synthetic method of the transparent material for the market.
The invention relates to a low-toxicity condensation polymerization type polyester transparent high polymer material with low visible light interference or without visible light interference, which is synthesized by taking conjugated hindered isophthalic acid or dimethyl isophthalate as one of monomer raw materials and diol containing six-membered aliphatic ring rigidity as a non-conjugated type high polymer material hardness adjustable monomer for the first time. Such design choices can maintain a certain desired range of light transmission (83-92%) while the degree of transparency required at application temperatures and the hardness of the material can be adjusted by the degree of polymerization and the cycloalkyl-containing diol.
In addition, the organic metal catalyst is another key element for synthesizing the transparent polyester condensation polymer material by condensation polymerization. Titanate catalysts have been tried, which exhibit better polymerization degree controllability and color stain controllability in the condensation polymerization of isophthalic acid and diol; the composite formula of the antimony metal catalyst and the organic tin is also a better high-efficiency catalytic condensation catalyst, but has no colored pollution phenomenon when the catalyst is kept for a long time at the high temperature of 230 ℃ and 250 ℃; titanate is one of the other polyester condensation polymerization catalysts tried in the patent, but certain color pollution phenomenon is caused when the condensation time is long in the high-temperature section in the condensation polymerization reaction; the titanate and organic metallic tin complex compound catalyst shows relatively better results, and the relative proportion of the titanate and the organic metallic tin complex compound catalyst has certain influence on the polymerization degree and the color pollution; the addition amount (0.01-0.9%) of organic titanate, organic tin and organic aluminum ternary catalyst has great influence on polymerization degree and color pollution; the composite catalyst (0.01-0.9%) of titanate complex and organic tin complex has relatively better effect, especially has obvious phenomenon of lightening high-temperature color pollution, and the control of polymerization degree in high-temperature polymerization reaction is easier to achieve the target; the organic aluminum complex is used as a condensation polymerization catalyst independently, so that the color pollution is obvious; the organotin complex alone catalyzes the condensation polymerization reaction (0.01 to 0.9%) of dimethyl isophthalate or isophthalic acid with 1, 4-cyclohexanediol or 1, 4-cyclohexanedimethanol, and the control of the color smear and the degree of polymerization of the transparent material also show relatively better results.
The invention designs an innovative transparent polymer transparent material with low conjugation transmission degree and low toxicity by taking isophthalic acid or methyl ester thereof as a monomer; designing and optimizing a colorless organic metal condensation polymerization catalyst; different diol monomer molecules and isophthalic acid are designed to be condensed and polymerized to form transparent high polymer materials with different transparencies and different hardnesses.
The effective condensation polymerization reaction adopted by the invention is realized according to the following reaction route and reaction equation, which are expressed as follows:
Figure BDA0002856053090000071
if the reaction formula of the condensation polymerization catalyst is one of the other key elements in the condensation polymerization reaction, in the condensation polymerization reaction of dimethyl isophthalate, firstly, a composite formula of titanate and organic aluminum metal complex (5:2 to 49:1) is selected as a first-choice catalyst, and the effect is better when the proportion of titanate is increased. The polymerization degree or viscosity of the condensation polymerization reaction product catalyzed by the composite formula catalyst within the temperature range of 230-270 ℃ has little difference within the range of 0.70-0.83dL/g, but the yellowing degree of the polymer products is different, and the color change is more sensitive when the proportion of the organic aluminum catalyst is increased. In addition, heat stabilizers can play an important role in the color of this polycondensation product.
In the reaction equation, when the monomer is dimethyl isophthalate, the methanol-removing condensation polymerization conditions are relatively mild, the highest condensation reaction temperature can be controlled within the range of 230-260 ℃, the reaction time is 2-9 hours, the high-temperature polymerization stabilizer can be added, generally the addition range is 0.005-0.07%, the high-temperature polymerization stabilizer can be triphenyl phosphate, or substituted calcium phenylphosphonate, or zinc salt or cobalt salt, or simple phosphorus, phosphonic acid, or esters, and the like.
The organotin complex and the titanate composite catalyst show better color change controllability in the condensation polymerization reaction of the reaction equation, and particularly when the ratio of organotin in the organotin and titanate composite formula is increased to 25-35:1, the color pollution phenomenon in the 230-270 ℃ high-temperature condensation polymerization reaction is obviously reduced. The pure organotin as the condensation polymerization catalyst of fig. 5 has better anti-color pollution performance than the organotitanate and organoaluminum complex compound catalyst.
The composite catalytic condensation polymerization reaction of the antimony catalyst and the titanate is better, but the transparency of the polymer product is reduced.
The diol containing cyclohexane group can also be selected from 1, 4-cyclohexanediol, and the hardness of the polycondensation product is higher when the content of trans-1, 4-cyclohexanediol is increased.
The present invention solves the following problems:
(1) the transparent high polymer material with low or no visible light interference is provided for the market, and more glass materials which are easy to break and have insufficient strength are obtained.
(2) The newly designed low-toxicity transparent high-molecular material replaces a toxic transparent material with bisphenol A.
(3) The novel organic metal catalyst of the invention forms a colorless and pollution-free high-molecular transparent material in high-temperature condensation polymerization.
Drawings
FIG. 1 shows the rainbow interference phenomenon generated by PC and Tritan transparent materials;
FIG. 2 is a schematic representation of a transparent polymer material 1 prepared in example 1;
FIG. 3 preparation of transparent Polymer Material 1 obtained in example 1 1 H NMR spectrum;
FIG. 4 shows a FT-IR test spectrum of the transparent polymer material 1 obtained in example 1;
FIG. 5 TGA/DSC thermogram results of the polymeric transparent material 1 prepared in example 1;
FIG. 6 is a schematic representation of a transparent polymer material 2 obtained in example 2;
FIG. 7 preparation of transparent Polymer Material 2 according to example 2 1 H NMR spectrum;
FIG. 8 is a FT-IR test spectrum of the transparent polymer material 2 obtained in example 2;
FIG. 9 TGA/DSC thermal curve results for polymeric transparent material 2 made in example 2;
FIG. 10 shows the UV-Vis spectrum of the transparent polymer material 1 obtained in example 1;
FIG. 11 shows the UV-visible spectrum of the transparent polymer material 2 prepared in example 2.
Detailed Description
Example 1 (Polymer transparent Material 1)
The condensation polymerization operation step takes dimethyl isophthalate as a monomer raw material.
Starting stirring under the protection of nitrogen, adding 1, 4-cyclohexanedimethanol (> 80% trans-form, 1.0mmol), dimethyl isophthalate (1.05-1.2mmol), titanate organic tin composite catalyst (0.03-0.5% w/w) and condensation polymerization high-temperature stabilizer phosphoric acid or triphenyl phosphate (0.003-0.07%) into a reaction bottle, vacuumizing to 5-25mmHg, then heating to 80-95 ℃, and controlling the stirring speed to avoid wall splashing. Reacting at 80-95 ℃ for 1-3 hours, and evaporating the methanol by-product; heating to 110-135 deg.c and stirring for 3-5 hr to evaporate out the side product methanol fast; heating to 170-190 deg.C for 4-6 h, continuing heating to 200-230 deg.C for 3-8 h, stopping stirring, and maintaining the temperature for 2-5 h to obtain transparent material (see figure 2). The temperature of 10% weight loss is 391.49 ℃, and the temperature of 50% weight loss is 415.06 ℃.
The results of the structural analysis are shown in 1H-NMR (FIG. 3), FT-IR (FIG. 4) and TGA/DSC curves (FIG. 5).
Example 2 (Polymer transparent Material 2)
The condensation polymerization operation step with isophthalic acid as monomer material.
Starting stirring under the protection of nitrogen, adding 1, 4-cyclohexanedimethanol (> 80% trans, 1.05-1-25mmol), isophthalic acid (1.0mmol), titanate organic tin composite catalyst (0.03-0.5% w/w) and condensation polymerization high-temperature stabilizer phosphoric acid or triphenyl phosphate (0.003-0.07%) into a reaction bottle, vacuumizing to 5-25mmHg, then heating to 110 ℃ and 130 ℃, and controlling the stirring speed to avoid the wall splashing phenomenon. Reacting at 110-130 deg.C for 2-3 h, heating to 150-185 deg.C, stirring for 4-7 h, and evaporating the by-product; heating to 210-235 ℃ for reaction for 4-8 hours, continuing heating to 250-270 ℃ for reaction for 3-10 hours, gradually stopping stirring in the temperature range, and keeping the temperature for 2-5 hours to obtain the transparent material (see figure 6). The temperature of 10 percent weight loss is 397.38 ℃, and the temperature of 50 percent weight loss is 418.34 ℃. The results of the structural analysis are shown in 1H-NMR (FIG. 7), FT-IR (FIG. 8) and TGA/DSC curves (FIG. 9).
As shown by the results of comparing the structural analysis results of the high molecular transparent material 1 and the high molecular transparent material 2, when dimethyl isophthalate is used as a polymerization monomer, the softening point of the obtained high molecular transparent material is lower (see thermal analysis curve 5), 1 further analysis of the H NMR spectrum showed that the area ratio of the double peak at 4.15ppm to the double peak at 4.2ppm was about two times larger, indicating that dimethyl isophthalate was used as a raw material monomer, and the cis structure of cyclohexanedimethanol in the condensation polymerization transparent polymer material is mainly involved in the polymerization product. In contrast, when isophthalic acid is used as the monomer for the condensation polymerization, the softening point of the obtained polymer transparent material is higher (see the thermal curve in FIG. 9) 1 On an H NMR spectrum, the area ratio of the double peak at 4.15ppm to the double peak at 4.2ppm is about 1:1, which indicates that the ratio of 1, 4-cyclohexanedimethanol participating in condensation polymerization by trans-diol is increased in the condensation polymerization reaction catalyzed by the same catalyst by using isophthalic acid as a monomer, and a transparent high polymer material with higher hardness can be obtained.
The results of uv-vis spectroscopy analysis of the polymer transparent material 1 and the polymer transparent material 2 (fig. 10 and fig. 11) show that the two transparent materials only exhibit weak absorption in the range of 220-255nm, which can confirm that the two transparent materials have conjugation blocking and no conjugation transmitting ability, and thus have low probability of generating visible light interference.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, but these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims (4)

1. The preparation method of the transparent high polymer material is characterized by comprising the following steps:
dimethyl isophthalate is taken as a monomer raw material, and the condensation polymerization operation is carried out under the catalysis of a titanate organic tin composite catalyst to obtain a product;
or
Using isophthalic acid as a monomer raw material, and carrying out condensation polymerization operation under the catalysis of a titanate organic tin composite catalyst to obtain a product;
the structural formula of the product is as follows:
Figure 703102DEST_PATH_IMAGE001
n=150-450。
2. the method for preparing the transparent polymer material according to claim 1, comprising the following steps: starting stirring under the protection of nitrogen, adding 1, 4-cyclohexanedimethanol, dimethyl isophthalate, titanate organic tin composite catalyst and condensation polymerization high-temperature stabilizer phosphoric acid or triphenyl phosphate into a reaction bottle, vacuumizing to 5-25mmHg, and heating to 80-95% o C, controlling the stirring speed to be free of wall splashing; at 80-95 o C, reacting for 1-3 hours, and evaporating a methanol by-product; heating to 110- o C, continuously stirring for 3-5 hours, and increasing the evaporation speed of the by-product methanol; the temperature is raised to 170 DEG and 190 DEG o C reacting for 4-6 hours, and continuously heating to 200- o C, reacting for 3-8 hours, and stirring gradually in the temperature rangeAnd (3) stopping stirring, and keeping the temperature for 2-5 hours to obtain the product.
3. The method for preparing the transparent polymer material according to claim 1, comprising the following steps: starting stirring under the protection of nitrogen, adding 1, 4-cyclohexanedimethanol, isophthalic acid, titanate organic tin composite catalyst and condensation polymerization high-temperature stabilizer phosphoric acid or triphenyl phosphate into a reaction bottle, vacuumizing to 5-25mmHg, and then heating to 110- o C, controlling the stirring speed to be free of wall splashing; at 110- o Reacting for 2-3 hours under C, raising the temperature to 150- o C, continuing stirring for 4-7 hours, and evaporating a byproduct, namely water; heating to 210- o C reacting for 4-8 hours, and continuously heating to 250-270- o C, reacting for 3-10 hours, gradually stopping stirring in the temperature range, and keeping the temperature for 2-5 hours to obtain the product.
4. The transparent polyester polymer material prepared by the preparation method of the transparent polymer material according to any one of claims 1 to 3 is applied to outdoor high-weather-resistance transparent plates or electronic screen related materials.
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