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A kind of foamed thermoplastic elastomer and preparation method thereof

A technology of elastomer and foaming heat, applied in the field of foamed thermoplastic elastomer and its preparation, can solve the problems of rough surface of foamed products, fast foaming rate, easy defoaming or opening holes, etc., to reduce production process, The effect of good touch and uniform cell distribution

Active Publication Date: 2019-03-01
NINGBO TAIYONG AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the known method for preparing foamed thermoplastic elastomers is to prepare thermoplastic elastomers first, then mix thermoplastic elastomers with foaming agents, and prepare foamed products through heating extrusion or heating injection molding. , the thermoplastic elastomer and foaming agent must be mixed evenly before continuous extrusion, the process is complicated and more equipment is invested
And the foaming agent that existing foaming material is selected is based on thermal decomposition type, as sodium bicarbonate, azobisisobutyronitrile etc., foaming speed is fast, and foaming amount is difficult to control, and the uniformity of foaming is poor, easily disappears. Bubbles or open cells, the surface of the prepared foamed product is rough

Method used

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  • A kind of foamed thermoplastic elastomer and preparation method thereof
  • A kind of foamed thermoplastic elastomer and preparation method thereof
  • A kind of foamed thermoplastic elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Components and weight fractions of foamed thermoplastic elastomers:

[0036] EPDM rubber: 50 parts

[0037] Ethylene homopolymer: 50 parts

[0038] High melt strength olefin: 10 parts

[0039] Paraffin oil: 10 parts

[0040] Microcapsule foaming agent: 5 parts

[0041] Nano-montmorillonite: 1 part

[0042] tert-butyl peroxybenzoate: 1 part

[0043] Trimethylolpropane: 0.5 parts.

[0044] Preparation:

[0045] The twin-screw diameter is 70mm, the length-to-diameter ratio is 60, and it is divided into 12 heating zones. The temperature and component feeding position of each heating zone are shown in Table 1 below.

[0046] Table 1 Twin-screw heating zone temperature and component feeding position

[0047]

[0048] Weigh EPDM rubber, ethylene homopolymer, high-melt strength olefin, and nano-montmorillonite, add them into the twin-screw extruder in heating zone 1, and add 50% by weight in heating zone 3 Paraffin oil, 6 heating zones add trimethylolpropane and 25%...

Embodiment 2

[0050] Components and weight fractions of foamed thermoplastic elastomers:

[0051] EPDM-g-GMA: 30 parts

[0052] Homopolymer PP: 20 parts

[0053] High melt strength olefin: 8 parts

[0054] Microcapsule foaming agent: 5 parts

[0055] White oil: 10 parts

[0056] Nano silica: 3 parts

[0057] Alkylphenol formaldehyde resin: 1 part

[0058] Tetramethylthiuram disulfide: 0.5 parts

[0059] Antioxidant 1010: 0.01 parts

[0060] Antioxidant 1068: 0.02 parts.

[0061] Preparation:

[0062] The diameter of the twin-screw is 80 mm, the length-to-diameter ratio is 65, and it is divided into 12 heating zones. The temperature and component feeding position of each heating zone are shown in Table 2 below.

[0063] Table 2 Twin-screw heating zone temperature and component feeding position

[0064]

[0065]

[0066] Weigh EPDM-g-GMA, homopolymer PP, high melt strength olefin, nano-silica, antioxidant 1010, and antioxidant 1068, add them to the twin-screw extruder in heati...

Embodiment 3

[0068] Components and weight fractions of foamed thermoplastic elastomers:

[0069] EPDM-g-GMA: 60 parts

[0070] Ethylene-octene copolymer: 55 parts

[0071] Naphthenic oil: 30 parts

[0072] High melt strength olefin: 15 parts

[0073] Microcapsule foaming agent: 10 parts

[0074] Nano calcium carbonate: 3 parts

[0075] Benzoyl peroxide: 2 parts

[0076] Dibenzothiazole disulfide: 2 parts.

[0077] Preparation:

[0078] The twin-screw diameter is selected to be 90 mm, and the length-to-diameter ratio is 55. It is divided into 11 heating zones. The temperature and component feeding position of each heating zone are shown in Table 3 below.

[0079] Table 3 Twin-screw heating zone temperature and component feeding position

[0080]

[0081] Weigh EPDM-g-GMA, ethylene-octene copolymer, high-melt strength olefin, and nano-calcium carbonate, and add them to the twin-screw extruder in heating zone 1. After the distribution is uniform, add 35% by weight in heating zone 4...

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Abstract

The invention relates to a foamed thermoplastic elastomer and a preparation method thereof, and belongs to the technical field of thermoplastic elastomer engineering. The foamed thermoplastic elastomer comprises the following components in parts by weight: 10-90 parts of ethylene-propylene-diene-terpolymer rubber, 10-85 parts of olefin copolymer plastic, 5-30 parts of high melt strength olefin, 5-65 parts of a rubber softening agent, 1-30 parts of a capsule foaming agent, 1-5 parts of a vulcanizing agent, 0.5-5 parts of an assistant vulcanizing agent and 1-5 parts of nanoparticles. According to the foamed thermoplastic elastomer and the preparation method thereof provided by the invention, through reasonable matching of the components of the raw materials, and by using a matching preparation method, a foamed product can be directly prepared, a production process of the foamed thermoplastic elastomer can be simplified, and the foaming ratio and the foam uniformity of the foamed thermoplastic elastomer can be improved.

Description

technical field [0001] The invention relates to a foamed thermoplastic elastomer and a preparation method thereof, belonging to the technical field of thermoplastic elastomer engineering. Background technique [0002] In recent years, foam moldings, a material with a soft touch, have been widely used in various fields in order to deal with vibration and noise problems in automotive interior and exterior parts, home appliances, office equipment, etc. Thermoplastic elastomer materials are favored for their ease of molding and foaming. [0003] At present, the known method for preparing foamed thermoplastic elastomers is to prepare thermoplastic elastomers first, then mix thermoplastic elastomers with foaming agents, and prepare foamed products through heating extrusion or heating injection molding. , the thermoplastic elastomer and foaming agent must be mixed evenly before continuous extrusion, the process is complicated and more equipment is invested. And the foaming agent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/06C08L51/04C08L51/00C08L23/08C08L23/12C08L23/14C08L91/06C08L91/00C08K3/34C08K5/053C08K3/36C08K5/40C08K3/26C08K5/47C08J9/32
CPCC08J9/32C08J2203/22C08J2323/06C08J2323/16C08J2351/00C08J2351/04C08K2201/011C08L23/06C08L23/16C08L51/003C08L51/04C08L2203/14C08L2205/02C08L2205/035C08L2207/04C08L23/12C08L23/14C08L91/06C08K3/346C08K5/053C08L91/00C08K3/36C08K5/40C08L23/0815C08K2003/265C08K5/47
Inventor 李文斌
Owner NINGBO TAIYONG AUTOMOTIVE PARTS