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A kind of preparation method of highly transparent thermoplastic polyurethane elastomer

A thermoplastic polyurethane and elastomer technology, which is applied in the field of polymer material preparation, can solve problems such as complex process and inconvenient operation, and achieve the effect of simple process, convenient operation, and reduced degree of phase separation

Active Publication Date: 2020-02-07
苏州奥斯汀新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of highly transparent thermoplastic polyurethane elastomer, in order to solve the problem in the prior art that IPDI is used for the complicated operation of preparing highly transparent thermoplastic polyurethane elastomer

Method used

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  • A kind of preparation method of highly transparent thermoplastic polyurethane elastomer
  • A kind of preparation method of highly transparent thermoplastic polyurethane elastomer
  • A kind of preparation method of highly transparent thermoplastic polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) 500g of PTMEG, 50g of PCDL, 0.5g of 2,6-di-tert-butyl-4-methylphenol, 0.5g of UV absorber, 1.5g of two (2,6-diisopropyl Add phenyl)carbodiimide into a three-necked flask equipped with a thermometer and a stirrer, dehydrate for 2 hours at 100-110°C and a vacuum lower than 133Pa, then cool to below 60°C, add 250g of methyl titanate catalyst mixed in advance IPDI, prepolymerized at 80~100℃ for 4.5h;

[0026] 2) Add a mixed chain extender of ethylene glycol and cis-1,3-cyclohexanedimethanol with a total mass of 46g and a mass ratio of 1.5:1, react uniformly until completely transparent, and obtain a prepolymer by vacuum defoaming , Pour the prepolymer into the mold and cure it step by step at 60-120°C for 8 hours to obtain a highly transparent thermoplastic polyurethane elastomer.

[0027] The performance test of high transparent thermoplastic polyurethane elastomer is as follows:

[0028] Shore hardness is tested according to GB / T531.1-2008; elongation and tensile str...

Embodiment 2

[0030] 1) 500g of PTMEG, 75g of PCDL, 0.5g of 2,6-di-tert-butyl-4-methylphenol, 0.5g of UV absorber, 1.5g of two (2,6-diisopropylbenzene Add carbodiimide into a three-necked flask equipped with a thermometer and a stirrer, dehydrate for 2 hours at 100-110°C and a vacuum lower than 133Pa, then cool to below 60°C, add 225g of methyl titanate catalyst mixed in advance IPDI, pre-polymerized at 80-100°C for 5 hours;

[0031] 2) Add a mixed chain extender of ethylene glycol and cis-1,3-cyclohexanedimethanol with a total mass of 85g and a mass ratio of 3:1, react uniformly until completely transparent, and obtain a prepolymer by vacuum defoaming , Pour the prepolymer into the mold and cure it step by step at 60-120°C for 8 hours to obtain a highly transparent thermoplastic polyurethane elastomer.

[0032] The performance test is the same as in Example 1.

Embodiment 3

[0034] 1) 500g of PTMEG, 100g of PCDL, 0.5g of 2,6-di-tert-butyl-4-methylphenol, 0.5g of hindered amine stabilizer, 1.5g of bis(2,6-diisopropyl Add phenyl) carbodiimide into a three-necked flask equipped with a thermometer and a stirrer, dehydrate for 2 hours at 100-110°C and a vacuum lower than 133Pa, then cool to below 60°C, add 220g of methyl titanate in advance Catalyst IPDI, pre-polymerized at 80-100°C for 6h;

[0035] 2) Add a mixed chain extender with a total mass of 103g and a mass ratio of 5:1 between 1,3-propanediol and trans-1,3-cyclohexanedimethanol, react uniformly until completely transparent, and obtain the pre- Pour the prepolymer into the mold and cure it step by step at 60-120°C for 8 hours to obtain a highly transparent thermoplastic polyurethane elastomer.

[0036] The performance test is the same as in Example 1.

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Abstract

The invention relates to a preparation method of a high-transparency thermoplastic polyurethane elastomer. The preparation method comprises the following steps: firstly, adding PTMEG, PCDL, an antioxidant, a light stabilizer and a hydrolysis resisting agent into a three-neck flask filled with a thermometer and a stirrer; after dehydration, cooling to below 60 DEG C, adding an IPDI premixed with titanate and / or an organic bismuth catalyst, and prepolymerizing at the temperature of 80 to 100 DEG C for 4 to 6 hours; secondly, adding a mixed chain extender of a non-cyclic chain extender and a cyclic chain extender, uniformly reacting until a mixture is completely transparent, and carrying out vacuum defoamation to obtain a prepolymer; pouring the prepolymer into a die, and carrying out stage-by-stage curing at the temperature of 60 to 120 DEG C for 8 to 12 hours to obtain the high-transparency thermoplastic polyurethane elastomer. According to the preparation method disclosed by the invention, a product prepared from an isocyanate component taking the IPDI as resin has good compatibility and high transparency; by adding the PCDL, light transmittance of the product is further improved; in addition, the preparation method is simple and convenient in process and convenient to operate.

Description

technical field [0001] The invention relates to the field of polymer material preparation, in particular to a preparation method of a highly transparent thermoplastic polyurethane elastomer. Background technique [0002] As a class of synthetic polymer materials, polyurethane can obtain various excellent properties by adjusting the chemical composition, and is widely used in the automotive industry, medical equipment, aerospace and other fields. However, ordinary polyurethane elastomers have poor heat resistance, unsatisfactory weather resistance and optical transparency, and their application range is limited, especially in some fields involving special performance technologies such as optics and protection. Therefore, the research and development of high-performance transparent polyurethane materials has attracted more and more attention, and has become a research hotspot in recent years. [0003] Transparent thermoplastic polyurethane elastomer has excellent optical prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/44C08G18/40C08G18/32C08G18/12
CPCC08G18/12C08G18/4018C08G18/44C08G18/4825C08G18/755C08G18/3206C08G18/3212C08G18/3228
Inventor 周述明邓春艳汪泽恒杨向宏
Owner 苏州奥斯汀新材料科技有限公司