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High-comfort polyurethane sponge as well as preparation method and application product thereof

A polyurethane sponge and comfort technology, applied in bandages, absorbent pads, medical science and other directions, can solve the problems of difficult to absorb and retain wound exudate, excessively wet wound environment, difficult tissue healing, etc., to reduce extensibility and Permanent deformation, high liquid retention rate, and the effect of solving poor comfort

Pending Publication Date: 2022-05-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comfort of polyurethane sponge is slightly better than that of polyvinyl alcohol sponge, but users still feel that the sponge is relatively hard when using it, and the use feeling needs to be further improved
Moreover, the existing polyurethane sponge has poor hydrophilicity, and it is difficult to effectively absorb and retain wound exudate. In the case of non-negative pressure during the treatment process, it is easy to cause the wound to be in an over-humid environment, which is not easy for tissue healing, etc.

Method used

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  • High-comfort polyurethane sponge as well as preparation method and application product thereof
  • High-comfort polyurethane sponge as well as preparation method and application product thereof

Examples

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preparation example Construction

[0037] The embodiment of the present invention provides the preparation method of the high-comfort polyurethane sponge as described above, comprising the following steps:

[0038] Mixing and reacting the polyether polyol and toluene diisocyanate until the NCO value is stable to obtain a polyurethane sponge material A; mixing water, a crosslinking agent and a catalyst to obtain a polyurethane sponge material B;

[0039] After mixing and foaming material A and material B in an appropriate proportion, the high-comfort polyurethane sponge is obtained.

[0040] In specific embodiments of the present invention, the preparation method of described polyurethane sponge comprises:

[0041] According to the weight ratio of the composition, under the protection of nitrogen, anhydrous polyether polyol, toluene diisocyanate and lubricant can be reacted at 40-120°C until the NCO value is stable to obtain polyurethane sponge A material; Use deionized water), crosslinking agent, catalyst, por...

Embodiment 1

[0049] Under nitrogen protection, in 100g of anhydrous polyether triol (ethylene oxide: propylene oxide is 30:70, number average molecular weight is 5000), add 46.73g of toluene diisocyanate (80% by mass percentage content of 2,4-toluene diisocyanate and 20% by mass of the mixture of 2,6-toluene diisocyanate), stirring and reacting at 80°C until the NCO value is stable, to obtain polyurethane sponge A material; 95.54g of deionized Water, 74.96g of glycerin, 3.82g of triethylenediamine, 15.94g of polyoxyethylene and polyoxypropylene block polymer (L-64), 4.92g of C8-10 fatty alcohol polyoxyethylene ether, 6.38g Polyoxyethylene sorbitan fatty acid ester, 2.41g of 3-aminopropyltrimethoxysilane and 1.25g of color paste were mixed uniformly at 20°C to obtain polyurethane sponge B material; 40g of the above-mentioned A material and 55.82g of material B was mechanically stirred at 15°C to foam freely, the rotating speed was 1500rpm, and the time was 30s. After foaming, a high-comfort...

Embodiment 2

[0051] Under nitrogen protection, in 100g of anhydrous polyether triol (ethylene oxide: propylene oxide is 75:25, number average molecular weight is 4000), add 40.12g of toluene diisocyanate (80% by mass content of 2,4-toluene diisocyanate and 20% by mass of 2,6-toluene diisocyanate), stirred and reacted at 95°C until the NCO value was stable to obtain polyurethane sponge A material; 98.06g of deionized Water, 52.07g of glycerin, 22.89g of trimethylolpropane, 4.03g of triethylenediamine, 5.61g of polyoxyethylene and polyoxypropylene block polymer (L-62), 12.05g of allyl Alcohol polyoxyalkyl ether, 5.01g of C8-10 fatty alcohol polyoxyethylene ether, 7.38g of sorbitan fatty acid ester, 1.98g of 3-aminopropyltrimethoxysilane and 1.25g of color paste in Mix evenly at 40°C to obtain polyurethane sponge material B; mechanically stir 40g of the above-mentioned material A and 57.33g of material B at 25°C to foam freely at a speed of 1200rpm for 30s, and obtain high-comfort polyurethan...

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Abstract

The invention provides a high-comfort polyurethane sponge, a preparation method and an application product thereof, the polyurethane sponge is mainly prepared from polyether polyol, toluene diisocyanate, water, a cross-linking agent and a catalyst according to a certain proportion, the polyether polyol is one or more of polyether triols formed by polymerizing ethylene oxide and epoxypropane; the high-comfort polyurethane sponge is non-toxic and has certain hydrophilicity. The polyurethane sponge provided by the invention has the advantages of high comfort, good hydrophilicity, high liquid retention rate, no toxicity, no sensitization and the like. The polyurethane sponge provided by the invention can be used as a medical wound protecting material to be applied to negative-pressure closed drainage treatment, can quickly discharge liquid in a negative-pressure closed environment, and is high in discharge rate. The lubricating agent is preferably introduced into the molecular chain of the sponge material, so that the extensibility and permanent deformation of the sponge material are obviously smaller after the sponge material is soaked in a bovine serum albumin solution for 5 days, and the problem that the existing negative pressure sealing drainage wound protection sponge is poor in comfort is solved.

Description

technical field [0001] The invention relates to the technical field of medical materials, in particular to a high-comfort polyurethane sponge, its preparation method and its application products. Background technique [0002] Negative pressure sealing drainage technology is a standard treatment mode for complex wounds and deep drainage. Usually, drainage tubes are placed on the wounds, and the drainage tubes are wrapped with medical wound-protecting sponge materials, and then the wounds are sealed with bio-semipermeable films to form A closed drainage system prevents the invasion of external bacteria, improves the blood supply of the wound, and achieves the effect of rapid wound healing. Negative pressure sealing drainage technology can be applied to the treatment of various chronic wounds, including pressure sores, diabetic feet, burns, varicose ulcers of lower extremities, etc. [0003] At present, commercially available negative pressure sealing drainage wound protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48A61L15/26A61L15/42C08G101/00
CPCC08G18/4837A61L15/26A61L15/425C08G2110/0083C08G2101/00C08L75/08
Inventor 杨小牛李金歌王洪博
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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