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High-absorption polyurethane foam and preparation method thereof

A technology of polyurethane foam and high absorption, which can be used in absorbent pads, bandages, medical science, etc. It can solve the problems of insufficient absorption, reduce the risk of impregnation of wounds, reduce torture, and reduce nursing costs.

Inactive Publication Date: 2022-06-07
广东舒尔康生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current material is still not good enough for absorbency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A highly absorbent polyurethane foam comprising a component A and a component B, wherein:

[0027] Component A is composed of hydrophilic polyurethane prepolymer and croscarmellose sodium. Take 900 grams of hydrophilic polyurethane prepolymer and 1 gram of croscarmellose sodium. The hydrophilic polyurethane prepolymer is a prepolymer with a terminal NCO group, wherein the NCO content is 3%, and the viscosity range is 10000mpa.s.

[0028] Component B consists of purified water, sodium hyaluronate and surfactant. Take 900 grams of purified water, 1 gram of surfactant, and 1 gram of sodium hyaluronate. The molecular weight range of sodium hyaluronate is 20,000 Daltons, and the surfactant is Span 20.

[0029] The A component and the B component are mixed according to the mass percentage of 1:1.

[0030] It can be prepared by the following steps:

[0031] Step 1, prepare component A: first put the hydrophilic polyurethane into the stirring device and stir at 50RPM, then a...

Embodiment 2

[0036] A highly absorbent polyurethane foam comprising a component A and a component B, wherein:

[0037] Component A is composed of hydrophilic polyurethane prepolymer and croscarmellose sodium. Take 950 grams of hydrophilic polyurethane prepolymer and 50 grams of croscarmellose sodium. The hydrophilic polyurethane prepolymer is a NCO-terminated prepolymer, wherein the NCO content is 7% and the viscosity range is 20000mpa.s.

[0038] Component B consists of purified water, sodium hyaluronate and surfactant. Take 950 grams of purified water, 50 grams of surfactant, and 50 grams of sodium hyaluronate. The molecular weight range of sodium hyaluronate is 25,000 Daltons, and the surfactant is Span 60.

[0039] The A component and the B component are mixed according to the mass percentage of 1:1.

[0040] It can be prepared by the following steps:

[0041] Step 1, prepare component A: first put the hydrophilic polyurethane into the stirring device and stir at 100RPM, then add th...

Embodiment 3

[0046] A highly absorbent polyurethane foam comprising a component A and a component B, wherein:

[0047] Component A is composed of hydrophilic polyurethane prepolymer and croscarmellose sodium. Take 999 grams of hydrophilic polyurethane prepolymer and 100 grams of croscarmellose sodium. The hydrophilic polyurethane prepolymer is a prepolymer with a terminal NCO group, wherein the NCO content is 10%, and the viscosity range is 30000mpa.s.

[0048] Component B is composed of purified water, sodium hyaluronate and surfactant. Take 999 grams of purified water, 100 grams of surfactant, and 100 grams of sodium hyaluronate. The molecular weight range of sodium hyaluronate is 20000-300000 Daltons, the surfactant is a mixture of Span 20 and Span 60, and the mass percentage of Span 20 and Span 60 is 1:1.

[0049] The A component and the B component are mixed according to the mass percentage of 3:1.

[0050]It can be prepared by the following steps:

[0051] Step 1, prepare componen...

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Abstract

The invention discloses high-absorption polyurethane foam and a preparation method thereof.The high-absorption polyurethane foam comprises a component A and a component B. The component A is composed of, by weight, 900-999 parts of hydrophilic polyurethane prepolymer and 1-100 parts of cross-linked sodium carboxymethyl cellulose, and the component B is composed of, by weight, 900-999 parts of hydrophilic polyurethane prepolymer and 1-100 parts of cross-linked sodium carboxymethyl cellulose; the component B is prepared from the following components in parts by weight: 900 to 999 parts of purified water, 1 to 100 parts of surfactant and 1 to 100 parts of sodium hyaluronate; the component A and the component B are mixed according to the mass percent of 1: 1-3: 1. The wound dressing has the capacity of absorbing wound exudate and can firmly lock the exudate, the risk that the wound is soaked is reduced, and a more favorable environment is provided for wound healing.

Description

technical field [0001] The invention relates to the field of medical dressing materials, in particular to a high absorption polyurethane foam and a preparation method thereof. Background technique [0002] With the increasing aging phenomenon in China, the incidence of various chronic wounds such as ulcers, bedsores, and diabetic foot is also on the rise. At present, the dressings used in the field of chronic wound care in China are still mainly traditional gauze. In the process of nursing chronic wounds, gauze still has major defects, mainly manifested in low rate of absorbing wound exudate, high frequency of dressing change, and easy adhesion to the wound during dressing change, causing secondary damage to the wound. Therefore, In the context of the rising incidence of chronic wounds, a material with high absorption and non-adhesion to wounds is urgently needed to replace traditional gauze. [0003] Polyurethane foam has become a medical wound dressing material. 202110490...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/26A61L15/28A61L15/42
CPCA61L15/26A61L15/28A61L15/425A61L15/42C08L75/04C08L1/286C08L5/08
Inventor 张华泉廖芸程聪
Owner 广东舒尔康生物科技有限公司
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