High-cost-performance medical soft transparent SEBS (Styrene-Ethylene-Butylene-Styrene block copolymer) material and preparation method thereof

A soft, transparent and cost-effective technology, applied in the field of medical materials, can solve the problems of difficult promotion and high cost of soft SEBS, and achieve the effect of excellent elasticity and lower production costs.

Inactive Publication Date: 2018-05-04
常州恒方大高分子材料科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when SEBS is used as a medical consumable, polypropylene is generally added to adjust the processing fluidity, but the surface hardness of polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cost-effective medical soft transparent SEBS material, mainly made of the following raw materials in parts by weight:

[0025] 100 parts of SEBS, 30 parts of Vaseline, 10 parts of POE, 0.3 parts of antioxidant 168.

[0026] The preparation method comprises the following steps:

[0027] 1) Dry SEBS, EVA, and antioxidant 168 at 60°C for 2 hours;

[0028] 2) Melting vaseline at a temperature of 70°C;

[0029] 3) Add the raw materials in step 1) to a high-speed mixer at 60°C for mixing, and add the melted vaseline in 2) at the same time, and mix evenly;

[0030] 4) adding the mixture of step 3) into a twin-screw extruder, melt blending, and granulating;

[0031] The temperature of the first zone of the twin-screw extruder barrel is 130°C, the temperature of the second zone is 160°C, the temperature of the third zone is 190°C, the temperature of the fourth zone is 180°C, and the temperature of the head is 170°C.

Embodiment 2

[0033] A cost-effective medical soft transparent SEBS material, mainly made of the following raw materials in parts by weight:

[0034] 100 parts of SEBS, 40 parts of POE, 25 parts of Vaseline, 0.5 parts of antioxidant 168.

[0035] The preparation method comprises the following steps:

[0036] 1) Dry SEBS, EVA, and antioxidant 168 at 60°C for 2 hours;

[0037] 2) Melting vaseline at a temperature of 70°C;

[0038] 3) Add the raw materials in step 1) to a high-speed mixer at 60°C for mixing, and add the melted vaseline in 2) at the same time, mix evenly and discharge;

[0039] 4) adding the mixture of step 3) into a twin-screw extruder, melt blending, and granulating;

[0040] The temperature of the barrel of the twin-screw extruder is 140°C in the first zone, 170°C in the second zone, 180°C in the third zone, 190°C in the fourth zone, and 180°C in the head.

Embodiment 3

[0042] A cost-effective medical soft transparent SEBS material, mainly made of the following raw materials in parts by weight:

[0043] 100 parts of SEBS, 20 parts of PP, 20 parts of POE, 10 parts of Vaseline, 0.3 parts of antioxidant 168.

[0044] The preparation method comprises the following steps:

[0045] 1) Dry SEBS, EVA, PP, and antioxidant 168 at 60°C for 2 hours;

[0046] 2) Melting vaseline at a temperature of 70°C;

[0047] 3) Add the raw materials in step 1) to a high-speed mixer at 60°C for mixing, and add the melted vaseline in 2) at the same time, and mix evenly;

[0048] 4) adding the mixture of step 3) into a twin-screw extruder, melt blending, and granulating;

[0049] The temperature of the first zone of the twin-screw extruder barrel is 120°C, the temperature of the second zone is 160°C, the temperature of the third zone is 180°C, the temperature of the fourth zone is 190°C, and the temperature of the head is 180°C.

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PUM

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Abstract

The invention discloses a high-cost-performance medical soft transparent SEBS (Styrene-Ethylene-Butylene-Styrene block copolymer) material and a preparation method thereof. A low-cost medical soft transparent SEBS provided by the invention basically copies all performance of an SEBS, is high-temperature-resistant, aging-resistant, has good elasticity; meanwhile, materials with lower costs are used, and problems that an ordinary medical SEBS has higher surface hardness and is difficultly made into a softer product are solved.

Description

technical field [0001] The invention belongs to the technical field of medical materials, and relates to a high cost-effective medical soft transparent SEBS material and a preparation method thereof. Background technique [0002] Styrenic thermoplastic elastomer is a thermoplastic elastomer with the largest output and the most similar properties to rubber. It is mainly divided into 4 types, namely: styrene butadiene styrene block copolymer (SBS), styrene isoprene Diene styrene block copolymer (SIS), styrene ethylene butylene styrene block copolymer (SEBS), styrene ethylene propylene styrene block copolymer (SEPS). Among them, SEBS and SEPS are hydrogenated copolymers of SBS and SIS, respectively. [0003] SEBS is the hydrogenation product of thermoplastic elastomer SBS. The hydrogenated SBS has a higher content of 1,2 structure, and the composition after hydrogenation is polystyrene (S)-polyethylene (E)-polybutene (B) - Polystyrene (S), so it is called SEBS for short. Sin...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L91/06C08L23/08C08L23/12C08K5/526
CPCC08L53/025C08L2201/08C08L2201/10C08L2205/03C08L2205/035C08L91/06C08L23/0815C08K5/526C08L23/12
Inventor 殷海青王庆海
Owner 常州恒方大高分子材料科技有限公司
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