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SBS (Styrene-Butadiene-Styrene) crosslinking elastomer composite material and preparation method thereof

A technology of cross-linked elastomers and composite materials, applied in the direction of coating, etc., can solve the problems of excessive particles, puncture debris, turbidity of liquid medicine, etc., and achieve the effect of stable performance, reasonable formula and good heat resistance

Active Publication Date: 2012-07-25
WEIHAI JIERUI MEDICAL PRODUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, butyl pistons, rubber plugs and rubber pads are prone to problems such as turbidity of liquid medicine, excessive particles, and puncture debris during use. This is mainly because raw rubber and oligomers, fillers, and metal oxidation Metal ions, rubber additives, vulcanizing agents, vulcanizing activators, coloring agents, etc. in the product interact with the drug

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The preparation method of the SBS cross-linked elastomer composite material of the present invention, the extrusion of the twin-screw extruder is divided into five sections from the feeding port to the machine head, and the temperature control is: the first section is 170~180°C, and the second section is 170°C. ~180°C, the third stage is 190~200°C, the fourth stage is 170~185°C, the fifth stage is 170~180°C, and the head temperature is 170°C.

[0018] In the preparation method of the SBS cross-linked elastomer composite material of the present invention, the injection molding of the injection molding machine is divided into four sections, and the temperature control is as follows: the first section is 150~160°C, the second section is 160~170°C, and the third section is 175~185°C. ℃, the fourth section is 165~175℃.

[0019] The preparation method of SBS cross-linked elastomer composite material of the present invention, described irradiation is at room temperature, carri...

Embodiment 1

[0021] Example 1: Weigh 100 parts of SBS (PS%: 24%, MI: 3g / min), 40 parts of SIS (PS%: 18%, MI: 21g / min), 20 parts of LDPE (MI: 5.5g / min) Put the mixture into a rotary mixer and mix evenly, and then put the mixture into a twin-screw extruder to extrude. It is divided into five sections from the feeding port to the machine head, and the processing temperature is controlled within the range of 170~185°C to obtain composite pellets. . Put the composite pellets into the barrel of the injection molding machine and inject 150mm*150mm*2mm strips in the injection molding machine. The injection molding is divided into four sections, and the processing temperature is controlled at 150~185°C. All strips were run in an air atmosphere at room temperature with a dose rate of 10 KGy / min 60 The Coγ radiation source was irradiated, and the irradiation dose was 400KGy. The irradiated strips have been tested for tensile strength of 7.5MPa, elongation at break of 430%, and compression set of 35...

Embodiment 2

[0022] Example 2: Weigh 100 parts of SBS (PS%: 24%, MI: 3g / min), 30 parts of SIS (PS%: 18%, MI: 21g / min), 15 parts of HDPE (MI: 2.4g / min) Put the mixture into a rotary mixer and mix evenly, and then put the mixture into a twin-screw extruder to extrude. It is divided into five sections from the feeding port to the machine head, and the processing temperature is controlled within the range of 170~195°C to obtain composite pellets. . Put the composite pellets into the barrel of the injection molding machine and inject 150mm*150mm*2mm strips in the injection molding machine. The injection molding is divided into four sections, and the processing temperature is controlled at 160~185°C. All strips were run in an air atmosphere at room temperature with a dose rate of 10 KGy / min 60 The Coγ radiation source was irradiated, and the irradiation dose was 290KGy. The irradiated strips have been tested with a tensile strength of 5.1MPa, an elongation at break of 485%, and a compression s...

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Abstract

The invention relates to a SBS (Styrene-Butadiene-Styrene) crosslinking elastomer composite material and a preparation method thereof. The SBS crosslinking elastomer composite material comprises 100 parts of SBS segmented copolymer, 10-14 parts of styrene-isoprene-styrene (SIS) segmented copolymer and 10-20 parts of polyethylene (PE); and the elastomer composite material is prepared through technologies such as extrusion, injection molding and irradiation. The macromolecular free radicals of the PE, SBS and SIS, which are excited by gamma rays, are crosslinked by self or mutually crosslinked to form a three-dimensional network structure; and networks are interpenetrated so that the permeation of water is more difficult, thereby the friction resistance and creep resistance performance as well as the mechanical performance at a high temperature of the composite material are increased. The SBS crosslinking elastomer composite material is mainly applied to medical pistons, rubber plugs and rubber mats, makes up the shortcoming of butyl pistons, rubber plugs and rubber mats and can completely replace butyl rubbers.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to SBS cross-linked elastomer composite materials and a preparation method thereof. Background technique [0002] Styrene-butadiene-styrene block copolymer (SBS) is a tri-block copolymer of styrene and butadiene as monomers, which has the characteristics of plastic and rubber, and is called "third-generation synthetic rubber". Similar to styrene-butadiene rubber, SBS can be in contact with water, weak acid, alkali, etc. It has excellent tensile strength, large surface friction coefficient, good low-temperature performance, and good processing performance. It has become the most consumed thermoplastic elastomer at present. SBS has incomparable advantages in processing and application of thermosetting rubber: (1) It can be processed and formed by thermoplastic processing equipment, such as extrusion, injection, blow molding, etc., and the molding speed is faster than traditional vulc...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L23/06B29B9/06B29C45/00B29C47/00B29C71/04
Inventor 杨志华唐雷王以秀李忠志
Owner WEIHAI JIERUI MEDICAL PRODUCTS CO LTD