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Plasticizer-free high-hydrolysis-resistance TPU (thermoplastic polyurethane) and preparation method thereof

A plasticizer and high-resistance technology, applied in the field of plasticizer-free high hydrolysis-resistance TPU and its preparation, can solve problems such as unsolved soft TPU processing cycle, achieve excellent mechanical strength, and the preparation method is simple and easy to operate, which is beneficial to The effect of industrial production

Pending Publication Date: 2022-01-11
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not solve the disadvantages of the long processing cycle of soft TPU and the addition of plasticizers.

Method used

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  • Plasticizer-free high-hydrolysis-resistance TPU (thermoplastic polyurethane) and preparation method thereof
  • Plasticizer-free high-hydrolysis-resistance TPU (thermoplastic polyurethane) and preparation method thereof
  • Plasticizer-free high-hydrolysis-resistance TPU (thermoplastic polyurethane) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A plasticizer-free high hydrolysis-resistant TPU is made of the following raw materials in parts by mass:

[0030]

[0031] The preparation method comprises the following steps:

[0032] (1) Mix the polyolefin modified polyester polyol with the chain extender, then fully stir at 90°C to obtain a premix;

[0033] (2) Add the diisocyanate and the catalyst into the storage tank A, add the pre-mixture into the storage tank B, stir at a speed of 500r / min, vacuum dehydrate at 110°C, and inject into the twin-screw extruder;

[0034] (3) React in a twin-screw extruder at 140°C and granulate to obtain TPU particles; the temperature of the feeding section of the twin-screw extruder is 120°C, the temperature of the mixing section is 150°C, and the temperature of the extrusion section is 180°C , the head temperature is 170°C.

Embodiment 2

[0036] A plasticizer-free high hydrolysis-resistant TPU is made of the following raw materials in parts by mass:

[0037]

[0038] The preparation method comprises the following steps:

[0039] (1) Mix the polyolefin modified polyester polyol with the chain extender, then fully stir at 100°C to obtain a premix;

[0040] (2) Add the diisocyanate and the catalyst into the storage tank A, add the premixture into the storage tank B, stir at a speed of 400r / min, vacuum dehydrate at 110°C, and inject into the twin-screw extruder;

[0041] (3) At 130°C, react in a twin-screw extruder and granulate to obtain TPU particles; the temperature of the feeding section of the twin-screw extruder is 110°C, the temperature of the mixing section is 130°C, and the temperature of the extrusion section is 170°C °C, the head temperature is 160 °C.

Embodiment 3

[0043] A plasticizer-free high hydrolysis-resistant TPU is made of the following raw materials in parts by mass:

[0044]

[0045] The preparation method comprises the following steps:

[0046] (1) Mix the polyolefin modified polyester polyol with the chain extender, then fully stir at 100°C to obtain a premix;

[0047] (2) Add the diisocyanate and the catalyst into the storage tank A, add the premixture into the storage tank B, stir at a speed of 600r / min, vacuum dehydrate at 110°C, and inject into the twin-screw extruder;

[0048] (3) React in a twin-screw extruder at 160°C, and granulate to obtain TPU particles; the temperature of the feeding section of the twin-screw extruder is 110°C, the temperature of the mixing section is 120°C, and the temperature of the extrusion section is 150°C. The head temperature is 150°C.

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Abstract

The invention relates to plasticizer-free high-hydrolysis-resistance TPU (thermoplastic polyurethane) and a preparation method thereof, and belongs to the technical field of thermoplastic polyurethane modification. The plasticizer-free high-hydrolysis-resistance TPU provided by the invention comprises the following raw materials in parts by mass: 10-20 parts of diisocyanate; 60-85 parts of polyolefin modified polyester polyol; 3-10 parts of a chain extender; and 0.5-1 part of a catalyst. The polyolefin modified polyester polyol is prepared by reacting at least one polyolefin polyol with at least one linear aliphatic polyol and aliphatic dicarboxylic acid. The ratio of the polyolefin polyol to the linear aliphatic diol is 1: (4-14). The plasticizer-free high-hydrolysis-resistance TPU disclosed by the invention not only has the advantages of excellent wear resistance, good mechanical strength, excellent oil resistance and excellent oxidation resistance of a thermoplastic polyurethane elastomer, but also has excellent hydrolysis stability, low-temperature performance and molding processing performance. Meanwhile, the invention provides a simple and convenient preparation method.

Description

technical field [0001] The invention relates to a plasticizer-free high hydrolysis-resistant TPU and a preparation method thereof, belonging to the technical field of thermoplastic polyurethane modification. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a high-performance polymer synthetic material, which has both the elasticity of rubber and the hardness of plastic, and also has good mechanical properties and resilience properties, and is widely used in various fields. Among them, polyester TPU has excellent mechanical properties and chemical solvent resistance, but its poor hydrolysis resistance and low temperature resistance greatly limit the scope of application. Especially for soft polyester TPU, the hydrolysis resistance decreases significantly with the increase of soft segment content. Because products with a hardness below 80 Shore A are obtained simply by adjusting the hard segment content, problems such as long processing cycle, stick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/42
CPCC08G18/4238C08G18/664C08G18/3206
Inventor 徐艳艳管永董良黄连超罗杰赵建勇
Owner SHANDONG INOV POLYURETHANE
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