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Method for preparing high-performance thermoplastic polyurethane elastomer

A thermoplastic polyurethane and elastomer technology, which is applied in the field of preparation of high-performance thermoplastic polyurethane elastomers, can solve problems affecting the linear structure of polymers and processing performance, and achieve strong operability, improved molecular weight and performance, and simple production processes Effect

Active Publication Date: 2018-05-29
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blending objects involved in this patent are poly(vinyl alcohol), poly(hydroxyethyl methacrylate) and its copolymers, poly(acrylic acid), poly(vinylpyrrolidone), polyamide, poly(ethylene-co-acetic acid) ethyl ester), poly(vinyl acetate), poly(formaldehyde), copolyesters, copolyamides, poly(acrylates) and poly(alkyl acrylates), with the addition of polyisocyanate compounds, It aims to improve the compatibility of thermoplastic polyurethane elastomers with other polymers through bonding reactions. Although this method can also improve melt strength and mechanical properties, it may have a partially crosslinked or branched structure, which affects the polymer. Linear structure, which in turn affects processability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of high-performance thermoplastic polyurethane elastomer, the steps are as follows:

[0042] (1) Oligomer polyol PBA2000 (polybutylene adipate diol, molecular weight is 2000) 600kg, small molecule chain extender BDO (1,4-butanediol) 89.5kg and diisocyanate MDI ( 4,4'-diphenylmethane diisocyanate) 310.5kg mixed, then add 0.06kg of organic tin catalyst, 0.9kg of antioxidant 1010, 0.6kg of antioxidant 264, 1.8kg of UV-49, 0.9kg of polyethylene wax and polycarbodiimide 1.8kg, injected into a twin-screw reactive extruder, set the reaction temperature at 160-190°C, and prepared a hydroxyl-terminated thermoplastic polyurethane elastomer through underwater pelletizing and dehumidification drying. The isocyanate index R 1 The value is 0.96, and the hard segment content is 40%;

[0043] (2) Oligomer polyol PBA2000 (polybutylene adipate diol, molecular weight is 2000) 600kg, small molecule chain extender BDO (1,4-butanediol) 82.8kg and diisocyanate MDI ( 4,4...

Embodiment 2

[0047] A preparation method of high-performance thermoplastic polyurethane elastomer, the steps are as follows:

[0048] (1) Oligomer polyol PBA2000 (polybutylene adipate diol, molecular weight is 2000) 600kg, small molecule chain extender BDO (1,4-butanediol) 87.7kg, diisocyanate MDI ( 4,4'-diphenylmethane diisocyanate) 312.3kg mixed, then add 0.06kg of organic tin catalyst, 0.9kg of antioxidant 1010, 0.6kg of antioxidant 264, 1.8kg of UV-49, 0.9kg of polyethylene wax and polycarbodiimide 1.8kg, injected into a twin-screw reactive extruder, set the reaction temperature at 160-190°C, and prepared a hydroxyl-terminated thermoplastic polyurethane elastomer through underwater pelletizing and dehumidification drying. The isocyanate index R 1 The value is 0.98, and the hard segment content is 40%;

[0049] (2) Oligomer polyol PBA2000 (polybutylene adipate diol, molecular weight is 2000) 600kg, small molecule chain extender BDO (1,4-butanediol) 83.6kg, diisocyanate MDI ( 4,4'-diph...

Embodiment 3

[0053] A preparation method of high-performance thermoplastic polyurethane elastomer, the steps are as follows:

[0054] (1) The oligomer polyol PTMEG1000 (polytetrahydrofuran diol, molecular weight is 1000) 600kg, small molecule chain extender BDO (1,4-butanediol) 69.8kg, diisocyanate MDI (4,4'-diol) Phenylmethane diisocyanate) 330.2kg mix, then add organotin catalyst 0.09kg, antioxidant 1010 is 0.9kg, antioxidant 264 is 0.6kg, UV-328 is 1.8kg and polyethylene wax 0.9kg, injects twin-screw reactive Extruder, set the reaction temperature at 160-190°C, and prepare a thermoplastic polyurethane elastomer terminated with hydroxyl groups through underwater pelletizing and dehumidification drying. Its isocyanate index R 1 The value is 0.96, and the hard segment content is 40%;

[0055] (2) The oligomer polyol PTMEG1000 (polytetrahydrofuran diol, molecular weight is 1000) 600kg, small molecule chain extender BDO (1,4-butanediol) 62.7kg, diisocyanate MDI (4,4'-diol) Phenylmethane di...

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PUM

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Abstract

The invention belongs to the technical field of high polymer materials and in particular relates to a method for preparing a high-performance thermoplastic polyurethane elastomer. According to the method, a novel idea is adopted, the defect that the molecular weight of a polyurethane elastomer is controlled by a single R value is avoided, although preparation of certain molecular weights of thermoplastic polyurethane elastomers sealed by different groups can be stilled affected by factors such as equipment metering precision and moisture at an early stage, the molecular weights can be remarkably increased when being compared with those of early-stage products after two times of polymerization at a later stage, and the viscosity and the mechanical properties can be remarkably improved; themethod is simple in production process and high in operability, and the absolute number-average molecular weight of the prepared thermoplastic polyurethane elastomer is 80.000 g / mol or greater (GPC (Gel Permeation Chromatography), light scattering methods).

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a high-performance thermoplastic polyurethane elastomer. Background technique [0002] Thermoplastic polyurethane elastomer is a segmented linear macromolecule, which is mainly composed of hard segments formed by the reaction of diisocyanate and small molecule chain extenders, and soft segments formed by the reaction of diisocyanates and oligomer polyols. Hardness depends on the content of hard segments. The isocyanate index R value refers to the ratio of isocyanate groups to hydroxyl groups. When R>1, thermoplastic polyurethane elastomers terminated with isocyanate groups are often prepared, and when R<1, thermoplastic polyurethane elastomers terminated with hydroxyl groups are often prepared. Theoretically, the closer the R value is to 1, the higher the molecular weight of the thermoplastic polyurethane elastomer. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G18/48
CPCC08G18/3206C08G18/4238C08G18/4854C08G18/664C08G18/6674C08G18/7671
Inventor 刘建文宋红玮张生王仁鸿王黑龙
Owner MIRACLL CHEM
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