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Preparation method of medical TPU developing material

A raw material, butanediol technology, applied in the field of preparation of medical TPU imaging materials, can solve the problems of cumbersome preparation process and low output, and achieve the effect of no local irritation and no allergic reaction

Inactive Publication Date: 2020-06-23
安徽精卫医用材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation process of the existing medical TPU imaging material is cumbersome and the output is low, so we introduce a preparation method of medical TPU imaging material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of a medical TPU developing material proposed by the present invention comprises the following raw materials in parts by weight: 4-4-diphenylmethane diisocyanate 44, polytetrahydrofuran 23, 1, 4-butanedi Alcohol 20.

[0017] The present invention also proposes a preparation method of a medical TPU imaging material, comprising the following steps:

[0018] S1: After measuring and mixing the raw materials, pour them into the twin-screw reactor;

[0019] S2: At high temperature 140°C-250°C, extrusion pressure 4MPa-7MPa, continuous granulation under water;

[0020] S3, then aging to obtain the finished product; the conveyor belt method is to measure and mix the raw materials, pour them on the conveyor belt with a heating system, pass through the drying tunnel for aging, and then crush and granulate to obtain the finished product.

Embodiment 2

[0022] A preparation method of a medical TPU developing material proposed by the present invention comprises the following raw materials in parts by weight: 4-4-diphenylmethane diisocyanate 44, polytetrahydrofuran 23, 1, 4-butanedi Alcohol 20, medical alcohol 4, coupling agent 3, antioxidant 3, and the balance is other additives.

[0023] The present invention also proposes a preparation method of a medical TPU imaging material, comprising the following steps:

[0024] S1: After measuring and mixing the raw materials, pour them into the twin-screw reactor;

[0025] S2: At high temperature 140°C-250°C, extrusion pressure 4MPa-7MPa, continuous granulation under water;

[0026] S3, then aging to obtain the finished product; the conveyor belt method is to measure and mix the raw materials, pour them on the conveyor belt with a heating system, pass through the drying tunnel for aging, and then crush and granulate to obtain the finished product.

Embodiment 3

[0028] A preparation method of a medical TPU developing material proposed by the present invention comprises the following raw materials in parts by weight: 4-4-diphenylmethane diisocyanate 44, polytetrahydrofuran 23, 1, 4-butanedi Alcohol 20.

[0029] The present invention also proposes a preparation method of a medical TPU imaging material, comprising the following steps:

[0030] S1: After measuring and mixing the raw materials, pour them into the twin-screw reactor;

[0031] S2: At high temperature 140°C-250°C, extrusion pressure 4MPa-7MPa, continuous granulation under water;

[0032] S3, then aging to obtain the finished product; the conveyor belt method is to measure and mix the raw materials, pour them on the conveyor belt with a heating system, pass through the drying tunnel for aging, and then crush and granulate to obtain the finished product.

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Abstract

The invention discloses a preparation method of a medical TPU developing material. The medical TPU developing material comprises the following raw materials in parts by weight: 35-45 parts of 4-4-diphenylmethane diisocyanate, 18-30 parts of polytetrahydrofuran and 15-25 parts of 1, 4-butanediol. The preparation method of the medical TPU developing material comprises the following steps: S1, metering and mixing the raw materials, and pouring the raw materials into a twin-screw reactor; S2, under the conditions that the high temperature is 140-250 DEG C and the extrusion pressure is 4-7 MPa, underwater continuous granulation is conducted; s3, curing to obtain a finished product. The conveyor belt method comprises the following steps: metering and mixing the raw materials, pouring onto a conveyor belt with a heating system, curing in a drying tunnel, crushing, and granulating to obtain the finished product. The TPU prepared in the invention has excellent biocompatibility, no toxicity, noanaphylactic reactivity, no local irritation and no pyrogenicity, so that the TPU is widely applied to medical and sanitary related products and sports and protective equipment.

Description

technical field [0001] The invention relates to the technical field of TPU preparation methods, in particular to a preparation method of a medical TPU developing material. Background technique [0002] TPU name is thermoplastic polyurethane elastomer rubber. It is mainly divided into polyester type and polyether type. It has a wide range of hardness (60HA-85HD), wear resistance, oil resistance, transparency, and good elasticity. It is widely used in daily necessities, sporting goods, toys, decorative materials and other fields. Halogen-free resistance Burning TPU can also replace soft PVC to meet environmental protection requirements in more and more fields. [0003] The preparation process of the existing medical TPU imaging material is cumbersome and the yield is low, so we introduce a preparation method of medical TPU imaging material. Contents of the invention [0004] Based on the technical problems existing in the background technology, the present invention propos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32
CPCC08G18/3206C08G18/4854C08G18/6674C08G18/7671
Inventor 张宏姜军旗
Owner 安徽精卫医用材料科技有限公司
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