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Precursor for foaming thermoplastic polyester elastomer, foaming body and its preparation method

A thermoplastic polyester and elastomer technology, which is applied in the field of thermoplastic elastic material foaming, can solve the problems of coarse cell structure size, high melt fluidity, low melt viscosity, etc., and achieve the optimization of elasticity and compression performance, cell The effect of uniform diameter and wide operating temperature

Active Publication Date: 2018-01-30
唐靖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of the foamed thermoplastic polyurethane beads reported in this report are that the cell structure size is relatively thick, "wrinkles" appear on the surface of the particles, and the product yield is low. In the foaming process, n-butane is used as a blowing agent, which is easy to cause environmental pollution. question
[0004] Although thermoplastic polyester elastomer (TPEE) has better mechanical properties than thermoplastic polyolefin elastomer (SEBS) and thermoplastic polyurethane elastomer (TPU), the structural characteristics of thermoplastic polyester elastomer determine that it has a lower Melt viscosity and high melt fluidity, not conducive to foaming

Method used

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  • Precursor for foaming thermoplastic polyester elastomer, foaming body and its preparation method
  • Precursor for foaming thermoplastic polyester elastomer, foaming body and its preparation method
  • Precursor for foaming thermoplastic polyester elastomer, foaming body and its preparation method

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preparation example Construction

[0076] The invention also discloses a preparation method of the thermoplastic polyester foam as described above, which comprises the following steps:

[0077] Precursor preparation: In parts by weight, add 100 parts of thermoplastic polyester elastomer, 2-10 parts of melt melt viscosity modifier, 0.2-1.2 parts of cell size stabilizer and 0.1-0.5 parts of UV stabilizer into the high-mixer The mixture is uniformly mixed in the medium, melted and kneaded by a twin-screw extruder, and then cooled down by extruder stranding or underwater pelletizing and cutting into pellets to obtain a thermoplastic polyester elastomer foaming precursor.

[0078] In some embodiments of the present invention, it is preferable to use underwater pelletizing for pellet preparation. When underwater pelletizing is used, due to the pressure of water, the particles can be formed into water droplets and the edges of the particles are reduced, which is beneficial to improve Subsequent foaming effect.

[0079] In s...

Embodiment approach

[0082] As an alternative embodiment of the present invention, the "blowing agent penetration" step includes:

[0083] Add the thermoplastic polyester elastomer foaming precursor and water into the autoclave, add the volatile foaming agent, pressurize to form an aqueous suspension mixture, and heat up to the softening point of the thermoplastic polyester elastomer foaming precursor , Pressurization makes the volatile foaming agent in a supercritical state, heat preservation and pressure retention.

[0084] The following examples further illustrate the present invention.

[0085] The physical indicators of the thermoplastic polyester elastomer particle material used in the following embodiments are:

[0086]

[0087] The above thermoplastic polyester elastomer granular materials can be purchased from China Jiangyin Hechuang Elastomer New Material Technology Co., Ltd., China Taiwan Changchun Chemical Co., Ltd., South Korea's SK company, and the United States DuPont company.

[0088] Plast...

Embodiment 1

[0091] a) Add 100 kg of thermoplastic polyester elastomer particles A, 5 kg of ethylene-acrylate-glycidyl methacrylate, 8 kg of sorbitan monostearate, and 0.25 kg of UV stabilizer into the mixer. After mixing, it was introduced into a twin-screw extruder through a hopper for melting and kneading, and the melt flow rate was tested at a constant temperature of 230°C and a load of 8.7kg. Extrude the molten kneaded product that meets the melt flow rate index from the die hole of the extruder with a diameter of 1.5mm into a strip shape, and cool it into a shape by cooling in a cooling water tank of about 5 meters in length, and cut it into 2.5mm with a pelletizer. Long particles to obtain a precursor for thermoplastic polyester elastomer foaming.

[0092] b) Mixing 100 kg of the obtained thermoplastic polyester elastomer foaming precursor and 500 kg of purified water into the autoclave to form an aqueous suspension mixture. While stirring, 30kg of carbon dioxide volatile blowing agen...

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Abstract

The invention provides a precursor for foaming a thermoplastic polyester elastomer, which is used for overcoming the problem that the existing thermoplastic polyester elastomer is hard to foam. The precursor is prepared from thermoplastic polyester elastomer, melt viscosity regulating agent and foam hole dimension stabilizer. Meanwhile, the invention further discloses thermoplastic polyester foaming body and its preparation method. The thermoplastic polyester foaming body has the advantages of being light in weight, good in appearance and excellent in rebound resilience, and good for popularization and application.

Description

[0001] This application is based on the Chinese invention patent with the application number 201610715351.X filed on August 24, 2016, titled "A thermoplastic polyester elastomer foamed particle and its preparation method", and claims its priority. Technical field [0002] The invention belongs to the technical field of thermoplastic elastic material foaming, and specifically relates to a precursor for thermoplastic polyester elastomer foaming, a foam and a preparation method thereof. Background technique [0003] At present, the commonly used foam plastics are polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, etc. Styrofoam products are difficult to degrade and prone to "white pollution". The United Nations Environment Organization has decided to stop using PS foam products. Polyethylene foam has poor high temperature resistance and is not suitable for high temperature applications. Such products should have high surface hardness, brittle cracks under pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L23/08C08K5/1535C08J9/12
CPCC08J9/122C08J2203/182C08J2205/04C08J2367/00C08J2423/08C08J2425/08C08L67/00C08L2203/14C08L2207/04C08L23/0884C08L25/08C08J9/12C08L23/08
Inventor 胡晓华李巡天唐靖
Owner 唐靖
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