Preparation method of biologically degradable thermoplastic polyurethane elastomer

A thermoplastic polyurethane and elastomer technology, applied in the field of preparation of biodegradable thermoplastic polyurethane elastomer, can solve the problems of high cost, secondary pollution, long degradation cycle, etc., and achieve the advantages of avoiding pollution, high modulus and excellent mechanical properties Effect

Active Publication Date: 2014-04-16
SHANDONG INOV POLYURETHANE
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of preparation method of biodegradable thermoplastic polyurethane elastomer, overcome the shortcoming of long degradation period of traditional aliphatic polyester type TPU and high cost of polycaprolactone type TPU, solve the two problems caused by waste TPU to the environment secondary pollution

Method used

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  • Preparation method of biologically degradable thermoplastic polyurethane elastomer

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Effect test

Embodiment 1

[0016] Preparation of biodegradable thermoplastic polyurethane elastomer: by weight, polybutylene adipate diol (PBA2000, M=2000): 240g, polycaprolactone diol (PCL2000): 60g, diphenylmethane Diisocyanate (MDI): 87.2g, 1,4-Butanediol (BDO): 18.2g, Isocyanate Index r 0 =0.99. Dehydrate PBA2000 at 110°C for 2 hours, then lower the temperature to 80°C, add BDO, mix well, add MDI and mix and stir for 15s, inject it into the mold, press it into a 1mm TPU sheet in a 100°C flat vulcanizer, and keep it at 100°C for vulcanization 4h, and then placed in a blast oven for 8h at 80°C. Embed the prepared TPU flakes in the sludge with a depth of about 15 cm and an ambient temperature of 25°C. After 3 months, take out the test weight loss and observe the appearance of the thin slice, and express the degree of degradation with the thin slice weight loss rate. The results are shown in Table 1.

Embodiment 2

[0018] According to the preparation method of embodiment 1.

[0019] Preparation of biodegradable thermoplastic polyurethane elastomer: measured by weight, PBA2000: 240g, PCL2000: 60g, MDI: 128.4g, BDO: 33.2g.

[0020] The results of antimicrobial performance of TPU buried in soil are shown in Table 1.

Embodiment 3

[0022] According to the preparation method of embodiment 1.

[0023] Preparation of biodegradable thermoplastic polyurethane elastomer: measured by weight, PBA2000: 240g, PCL2000: 60g, MDI: 189.9g, BDO: 55.6g.

[0024] The results of antimicrobial performance of TPU buried in soil are shown in Table 1.

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Abstract

The invention belongs to the technical field of chemical engineering synthesis, and particularly relates to a preparation method of biologically degradable thermoplastic polyurethane elastomer. According to the invention, a simple one-stage method is adopted, and polymer polyol, diisocyanate, and a chain extender are used to synthesize the biologically degradable thermoplastic polyurethane elastomer. The synthesized elastomer keeps excellent mechanical property, wear resistance, oil resistance, high strength, high modulus and other performance, and has the prominent characteristic of being able to achieve auto-biodegradation for a proper duration or under a proper natural environment, so that no toxic material or pollution is generated, and the pollution of the environment by the waste material is effectively avoided. The preparation method can overcome the defects of long degradation period in the conventional aliphatic polyester TPU and of high manufacturing cost in polycaprolactone TPU, and is widely applied to various fields.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of a biodegradable thermoplastic polyurethane elastomer. Background technique [0002] With the rapid growth of plastic production, the post-processing of waste plastics and the environmental pollution caused by them have attracted more and more attention from all countries. The waste of raw materials and environmental pollution caused by plastic waste has become a global problem. Developing degradable plastics is an effective way to solve plastic pollution. [0003] Thermoplastic polyurethane elastomer (TPU) is a kind of polyurethane material that can be plasticized by heating and can be dissolved by solvent. It is widely used in many fields because it has the elasticity of rubber and the processability of plastic. Polyester polyurethane elastomer not only has excellent mechanical properties, high strength, high elongation and high e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32
CPCC08G18/4238C08G18/4277C08G18/664C08G2230/00
Inventor 陈淑海李健陈海良高振胜
Owner SHANDONG INOV POLYURETHANE
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