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A kind of shape memory rigid polyurethane foam medical splint material and preparation method thereof

A technology of rigid polyurethane and foaming materials, which is applied in the manufacturing field of rigid polyurethane foamed medical splint materials, can solve the problems of poor air permeability, high density, slow deformation memory speed, etc. The effect of process performance

Active Publication Date: 2020-09-29
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of high density, poor gas permeability, slow deformation and slow memory speed of existing shape memory splint materials, and proposes a new preparation method of shape memory rigid polyurethane foam

Method used

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  • A kind of shape memory rigid polyurethane foam medical splint material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Component A (isocyanate component): Obtained according to the following preparation method: by weight percentage, 32.4% of polytetrahydrofuran ether polyol (PTMG-1000) with 2 functionalities and molecular weight of 1000, diphenylmethane diisocyanate (MDI-100 ) 67.6%, reacted at 80°C for 2 to 3 hours to obtain a prepolymer with an isocyanate content of 20%.

[0073] Component B (polyol component): obtained according to the following preparation method: in parts by weight, polytetrahydrofuran ether polyol (PTMG-2000) 20 with a molecular weight of 2000, polyethylene adipate polyol with a molecular weight of 2000 (PEA-2000) 80, chain extender EG 5.0, chain extender TMP 4.0, catalyst stannous octoate 0.05, catalyst A33 0.05, antioxidant 1010 0.5, blowing agent deionized water 0.4, blowing agent HCFC-141b 5 , foam stabilizer DC193 0.5, cell opener Ortegol 501 2, stir well with a high-speed mixer.

[0074] The isocyanate component and the polyol component are mixed and reacte...

Embodiment 2

[0076] Component A (isocyanate component): Obtained according to the following preparation method: by weight percentage, 32.4% of polycaprolactone polyol (210) with 2 functionalities and a molecular weight of 1000, diphenylmethane diisocyanate (MDI-100) 67.6%, react at 80°C for 2 to 3 hours to obtain a prepolymer with an isocyanate content of 20%.

[0077] Component B (polyol component): Obtained according to the following preparation method: in parts by weight, polyethylene adipate polyol (PEA-2000) 40 with a molecular weight of 2000, polyphthalic anhydride polyester polyol with a molecular weight of 1000 Alcohol (PD-110LV) 60, chain extender EG 4, chain extender DMTDA 3, catalyst stannous octoate 0.05, catalyst A33 0.05, antioxidant 1010 0.5, blowing agent deionized water 0.4, blowing agent cyclopentane 5. Foam stabilizer AK-8804 0.5, cell opener AK-9901 0.9, stir evenly with a high-speed mixer.

[0078]The isocyanate component and the polyol component are mixed and reacted...

Embodiment 3

[0080] Component A (isocyanate component): Obtained according to the following preparation method: by weight percentage, 19.67% of polycaprolactone polyol (210) with 2 functionalities and a molecular weight of 1000, diphenylmethane diisocyanate

[0081] (MDI-100) 48.03%, carbodiimide modified diphenylmethane diisocyanate

[0082] (MDI-100LL) 32.30%, react at 80°C for 2 to 3 hours to obtain a prepolymer with an isocyanate content of 25%.

[0083] Component B (polyol component): obtained according to the following preparation method: in parts by weight, polycaprolactone polyol (210) 60 with a molecular weight of 1000, polycaprolactone polyol (220) 40 with a molecular weight of 2000, Chain extender BDO 3.5, chain extender DEOA3.5, catalyst stannous octoate 0.05, catalyst A33 0.05, antioxidant 1010 0.5, foaming agent deionized water 0.4, foaming agent HCFC-141b 5 foam stabilizer DC193 0.5, Cell opener Ortegol 501 1, stir well with a high-speed mixer.

[0084] The isocyanate comp...

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Abstract

The invention relates to lightweight shape-memory rigid polyurethane foam plastic composition with high porosity and high hardness and a preparation method of the composition. The composition is prepared from a prepolymer component and a polyol component by reaction. The preparation method is simple; the obtained product has higher hardness and lower density, is safe and environmentally friendly and has good process performance.

Description

technical field [0001] The invention belongs to the manufacturing method of rigid polyurethane foam plastic medical splint material, in particular to a rigid polyurethane foam material with light weight, high porosity and excellent shape memory, which is prepared by liquid reaction injection molding technology and applied to medical splint and its preparation method. Background technique [0002] The polyurethane material is composed of a hard segment with a large cohesive energy and a soft segment with a small cohesive energy. The soft segment and the hard segment are thermodynamically incompatible, so a microphase-separated structure will be formed, which is its The shape memory property provides certain conditions, in which the hard segment phase has chemical cross-linking, and the temperature rise will not affect its cross-linked three-dimensional configuration, so it can play a role in memory of the initial shape, while the soft segment phase is due to the molecular cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/38C08G18/40C08G18/42C08G18/44C08G18/48C08G18/10C08G18/32C08J9/08C08J9/14C08G101/00
CPCC08G18/10C08G18/3275C08G18/3857C08G18/4018C08G18/4202C08G18/4208C08G18/4238C08G18/4277C08G18/44C08G18/4854C08G18/6611C08G18/6651C08G18/6655C08G2280/00C08J9/08C08J9/141C08J9/144C08G2110/0025C08G2110/0066C08G18/3206
Inventor 刘锦春秦贤玉孙秀利刘晓文
Owner QINGDAO UNIV OF SCI & TECH
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