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Application of multifunctional interpenetrating network polymer emulsion in polyurethane flexible foam plastic modification

A technology of polymer emulsion and polyurethane soft foam, which is applied in the field of polyvinylpyrrolidone chain and alkoxy polyethylene glycol, and can solve the problems of reduced concentration of antibacterial agents, poor safety of inorganic antibacterial agents, and uncertain safety.

Active Publication Date: 2021-01-22
JIANGSU OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of using inorganic antibacterial agents through physical doping or adsorption is added to polyurethane foam dressings. When polyurethane foam dressings come into contact with wounds, they will be released and precipitated under the action of wound exudate to achieve the purpose of killing bacteria. One process has the problem that the concentration of antibacterial agents decreases with time, and the antibacterial persistence is poor. On the other hand, inorganic antibacterial agents also have certain toxicity to the human body, and their safety is uncertain. Poor persistence and poor safety of inorganic antibacterial agents
[0005] In summary, polyurethane foam dressings mainly focus on the preparation of water-absorbing or antibacterial materials. Polyurethane foam dressings have a single function and cannot meet the multifunctional requirements of wound dressings.

Method used

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  • Application of multifunctional interpenetrating network polymer emulsion in polyurethane flexible foam plastic modification
  • Application of multifunctional interpenetrating network polymer emulsion in polyurethane flexible foam plastic modification
  • Application of multifunctional interpenetrating network polymer emulsion in polyurethane flexible foam plastic modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 40 grams of 6950F brand toluene isocyanate trimer with a solid content of about 50% produced by Shandong Wanhua Company and add it to the reaction kettle, then add 22 grams of polyethylene glycol-2000 monomethyl ether, 30 grams of quality The average molecular weight is 2000 single-terminal hydroxyl polyvinylpyrrolidone, 25 grams of hydroxyl-terminated polyether quaternary ammonium salts of structure shown in formula (1-1), 0.18 gram of dibutyltin dilaurate, 0.13 gram of triethylenediamine add reaction Kettle, N 2 Under protection and stirring, control the temperature of the material in the reactor to 50-65°C, and control the reaction time of gradual addition polymerization for 2 hours; then add 25 grams of dry-processed 2,000 mass average molecular weight produced by Shandong Lanxing Dongda Chemical Co., Ltd. Polyether diol DL-2000D, 3.5 grams of glycerin and 12 grams of toluene diisocyanate (TDI80 / 20), react at a temperature of 70~80°C for 2 hours; when the mate...

Embodiment 2

[0052] According to the method and operating steps of Example 1, the formula (1-1) hydroxyl-terminated polyether quaternary ammonium salt in Example 1 is replaced by formula (1-2) hydroxyl-terminated polyether quaternary ammonium salt, toluene isocyanate trimer Change to diphenylmethane diisocyanate trimer, and toluene diisocyanate to diphenylmethane diisocyanate to prepare multifunctional interpenetrating network polymer-2 emulsion.

[0053] Wherein formula (1-2) hydroxyl-terminated polyether quaternary ammonium salt structure is as follows:

[0054]

[0055] Set the relative density to 0.85 g / cm 3 、The cell diameter is 40~120 µm, the opening rate is 70~90%, and the moisture permeability is 3600 g / cm under normal conditions 2 24 hours of commercially available 10*2*0.2 cm polyurethane soft foam sheets were placed in ethanol, ultrasonically cleaned for 30 minutes, taken out and dried, then immersed in the multi-functional interpenetrating network polymer-1 emulsion and squ...

Embodiment 3

[0057] According to the method and operation steps of embodiment 1, the formula (1-1) hydroxyl-terminated polyether quaternary ammonium salt in embodiment 1 is changed into formula (1-3) hydroxyl-terminated polyether quaternary ammonium salt, polyethylene glycol- 2000 monomethyl ether is replaced by polyethylene glycol-2000 monolauryl ether, toluene isocyanate trimer is replaced by diphenylmethane diisocyanate trimer, toluene diisocyanate is replaced by diphenylmethane diisocyanate, and multifunctional Interpenetrating network polymer-3 emulsion.

[0058] Wherein formula (1-3) hydroxyl-terminated polyether quaternary ammonium salt structure is as follows:

[0059]

[0060] Set the relative density to 0.18 g / cm 3 , The cell diameter is 200~400 µm, the opening rate is 70~90%, and the moisture permeability is 8600 g / cm under normal conditions 2 24 hours of commercially available 10*2*0.2 cm polyurethane soft foam sheets were placed in ethanol, ultrasonically cleaned for 30 m...

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Abstract

The invention provides an application of a multifunctional interpenetrating network polymer emulsion in polyurethane flexible foam plastic modification. The invention especially relates to an application of a polyurethane polyacrylate interpenetrating network polymer emulsion, in particular to an application of a polyurethane polyacrylate interpenetrating network polymer emulsion with a side chaingrafted with a quaternary ammonium cation polyether chain, a polyvinylpyrrolidone chain and an alkoxy polyethylene glycol chain in hydrophilic sterilization modification of commercially available polyurethane flexible foam plastics. The invention relates to a polyurethane flexible foam plastic subjected to surface hydrophilic sterilization modification as a filtering material in medical dressingsor air purifiers.

Description

technical field [0001] The invention relates to the application of a multifunctional interpenetrating network polymer emulsion in the modification of polyurethane soft foam plastics, in particular to the modification of side chains grafted with quaternary ammonium cationic polyether chains, polyvinylpyrrolidone chains and alkoxy polyethylene glycol chains Application of polyurethane-polyacrylate interpenetrating network polymer emulsion in the hydrophilic sterilization modification of commercially available polyurethane soft foam plastics, and the hydrophilic sterilization modified polyurethane soft foam plastics are used as filter materials in medical dressings or air purifiers , belonging to the field of functional polymer materials. Background technique [0002] Polyurethanes (PUs) is a general term for a large class of polymers containing urethane (-NHCOO-) repeating units in the main chain. It is usually produced by the polyaddition reaction of polyols and polyisocyanat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C08F283/00C08F220/14C08F212/08C08F220/18C08F222/14C08L75/04A61L15/26A61L15/42A61L15/46A61L15/60
CPCC08J9/42C08F283/008A61L15/26A61L15/42A61L15/425A61L15/46A61L15/60C08J2375/04C08J2475/14C08J2433/12A61L2400/04C08F220/14C08F212/08C08F220/1811C08F222/102C08L75/04
Inventor 斯琴高娃于法港吴国浩张源源张田林
Owner JIANGSU OCEAN UNIV
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