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Antibacterial polyurethane slow rebound foam and preparation method thereof

A technology of slow rebound and polyurethane, which is applied in the field of polyurethane material preparation, can solve the problems that the antibacterial and antifungal properties have not been greatly improved, and the antibacterial and antifungal properties have not been greatly improved, etc. Effects of degrading biological activity, enhancing antibacterial activity, and improving solubility

Active Publication Date: 2021-08-27
JIANGSU ZHONGHENG KELAIBI FURNITURE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the antibacterial and antifungal properties have not been greatly improved.
However, the disadvantage of this method is that polyurethane coatings are prepared, and their antibacterial and antifungal properties have not been greatly improved.

Method used

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  • Antibacterial polyurethane slow rebound foam and preparation method thereof
  • Antibacterial polyurethane slow rebound foam and preparation method thereof
  • Antibacterial polyurethane slow rebound foam and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0033] see figure 1Shown, the invention provides a kind of preparation method of antibacterial polyurethane slow resilience foam, comprises the steps:

[0034] S1. Preparation of quaternary ammonium salt-modified chitosan: weigh a predetermined amount of chitosan, add 40% sodium hydroxide aqueous solution and isopropanol, stir and heat to 50-60°C for 1-3 hours of alkalization Then dropwise add 3-chloro-2-hydroxypropyltrimethylammonium chloride solution with a concentration of 35%, raise the temperature to 70-80°C for 8-10 hours, filter, wash and dry to obtain the quaternary ammonium salt Modified chitosan;

[0035] S2. Preparation of guanidinium-modified chitosan: configure a predetermined amount of 0.5mol / L hydrochloric acid solution, slowly add a predetermined amount of chitosan, stir for 40-60 minutes, then add absolute ethanol for precipitation, stir, suction filter and dry. Chitosan hydrochloride is obtained; the chitosan hydrochloride is added to deionized water and mi...

Embodiment 1

[0046] The preparation method of antibacterial polyurethane slow rebound foam:

[0047] S1. Preparation of quaternary ammonium salt modified chitosan: Weigh 5g of chitosan, add 50mL of 40% sodium hydroxide aqueous solution and 150mL of isopropanol, heat to 50°C under stirring and basify at constant temperature for 2h; slowly drop 25g 3-chloro-2-hydroxypropyltrimethylammonium chloride solution with a concentration of 35%, then heated up to 75°C, kept at a constant temperature for 9 hours, adjusted the pH to ≤7 with dilute hydrochloric acid after the reaction, filtered, washed and dried to obtain quaternary Ammonium salt modified chitosan.

[0048] S2. Preparation of guanidine-modified chitosan: configure 100 mL of 0.5 mol / L hydrochloric acid solution, then slowly add 5.0 g of chitosan, stir with a magnetic stirrer for 40 min, then add 3 times the volume of absolute ethanol for precipitation, and stir Suction filter and dry after uniformity to obtain chitosan hydrochloride; wei...

Embodiment 2-5

[0060] The difference with Example 1: in the preparation process of step S3, the massfraction of guanidino-modified chitosan and quaternary ammonium salt modified chitosan are different, other steps are all the same as Example 1, no longer repeat.

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Abstract

The invention provides an antibacterial polyurethane slow rebound foam and a preparation method thereof. First, chitosan is alkalized, and then 3-chloro-2-hydroxypropyltrimethylammonium chloride is added dropwise for modification reaction to prepare quaternary ammonium salt modified chitosan; then, the shell The polysaccharide is prepared into chitosan hydrochloride, then dicyandiamide is added to carry out the chitosan biguanide modification reaction, and the guanidine-based modified chitosan is prepared; finally, the quaternary ammonium salt modified chitosan and The guanidinium-modified chitosan is bonded to the molecular chain of the polyurethane slow-rebound foam to prepare the antibacterial polyurethane slow-rebound foam. The antibacterial polyurethane slow-rebound foam prepared by the present invention not only has excellent slow-rebound performance, but also has excellent and durable antibacterial performance and anti-mold performance, and its antibacterial rate to E. The mildew grade is 0 grade.

Description

technical field [0001] The invention relates to the field of polyurethane material preparation, in particular to an antibacterial polyurethane slow-rebound foam and a preparation method thereof. Background technique [0002] Polyurethane slow rebound foam is a viscoelastic foam, also known as memory foam because of its shape memory function. It is a special material in foam plastics. When the foam is deformed by external force, its strain lags behind the change of stress, so when the external force is applied to the foam, it does not recover immediately, but after 3 to 15 seconds. Slowly return to its original shape, so this particular foam is called slow rebound foam, also known as memory foam. Because the slow rebound polyurethane foam has good shape memory characteristics, strong energy absorption, shock absorption and shock resistance, and also has excellent resilience, sound absorption, air permeability and heat preservation, it has been widely used in the field of cus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/64C08G18/48C08G18/63C08B37/08C08G101/00
CPCC08B37/003C08G18/4081C08G18/48C08G18/632C08G18/6484C08G18/7671C08G2270/00C08G2110/0083
Inventor 赵裕祥潘敬春
Owner JIANGSU ZHONGHENG KELAIBI FURNITURE CO LTD