Composite antibacterial polyurethane block polymer and preparation and application thereof

A polyurethane block and composite antibacterial technology, which is applied in the field of composite antibacterial polyurethane block polymers and its preparation and application, can solve the problems of poor antibacterial properties, and achieve the effect of improving antibacterial properties and improving mechanical properties

Active Publication Date: 2019-01-04
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a composite antibacterial polyurethane block polymer and its

Method used

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  • Composite antibacterial polyurethane block polymer and preparation and application thereof
  • Composite antibacterial polyurethane block polymer and preparation and application thereof
  • Composite antibacterial polyurethane block polymer and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Add 20 parts by weight of PEG-2000 and 4 parts by weight of PPG-3050D into the reaction bottle, heat to 120°C and vacuum dry for 2 hours to cool down to room temperature, add 17 parts by weight of MDI-50, 1.5 parts by weight of composite reactive antibacterial agent, and heat up to 80 ℃ reaction, use di-n-butylamine acetone method to titrate the isocyanate content, reach the predetermined value, stop the reaction, and obtain A component. The dihydroxy quaternary ammonium salt: polyhexamethylene guanidine salt in the compound reaction antibacterial agent is 1:5 (mass ratio).

[0032] Add 100 parts by weight of PPG-2000D, 20 parts by weight of PPG-3050D and 0.48 parts by weight of catalyst into the reaction bottle, dry it in vacuum at 120°C for 2 hours, cool down to room temperature, add 6 parts by weight of E-300, heat to 90°C-100°C, and vacuum Dry for 1 hour, lower to room temperature, add 0.25 parts by weight of dehydrated s-triazine to prepare component B.

[0033] Th...

Embodiment 2

[0035] Add 40 parts by weight of PPG-4000D and 10 parts by weight of PPG-3050D into the reaction bottle, heat to 120°C and vacuum dry for 2 hours and cool down to room temperature. ℃ reaction, use di-n-butylamine acetone method to titrate the isocyanate content, reach the predetermined value, stop the reaction, and obtain A component. The dihydroxy quaternary ammonium salt: polyhexamethylene guanidine salt in the compound reaction antibacterial agent is 1:3 (mass ratio).

[0036] Add 60 parts by weight of PPG-2000D, 30 parts by weight of PPG-3050D and 0.36 parts by weight of catalyst into the reaction bottle, dry it in vacuum at 120°C for 2 hours, cool down to room temperature, add 8 parts by weight of E-300, heat to 90°C-100°C, and vacuum Dry for 1 hour, cool down to room temperature, and add 0.19 parts by weight of dehydrated s-triazine to prepare component B.

[0037] The ratio of isocyanate group to active hydrogen is 1.05, A and B are mixed, stirred and degassed, and cur...

Embodiment 3

[0039] Add 20 parts by weight of PPG-1000D and 8 parts by weight of PPG-3050D into the reaction bottle, heat to 120°C and vacuum-dry for 2 hours to cool down to room temperature, add 20 parts by weight of MDI-50, 2.5 parts by weight of composite reactive antimicrobial agent, and heat up to 80°C For the reaction, titrate the isocyanate content with the di-n-butylamine acetone method to reach a predetermined value, stop the reaction, and obtain component A. The dihydroxy quaternary ammonium salt: polyhexamethylene guanidine salt in the composite reaction antibacterial agent is 1:1 (mass ratio).

[0040] Add 80 parts by weight of PPG-2000D, 40 parts by weight of PPG-3050D and 0.48 parts by weight of catalyst into the reaction flask, dry it in vacuum at 120°C for 2 hours, cool down to room temperature, add 8 parts by weight of E-300, 2 parts by weight of E-100, and heat to 90°C-100°C, vacuum-dried for 1 hour, lowered to room temperature, and added 0.26 parts by weight of dehydrati...

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Abstract

The invention relates to a composite antibacterial polyurethane block polymer and preparation and application thereof. A double-component solvent-free synthesis method is mainly adopted, and polyisocyanates, a mixed hydroxyl polymer, a liquid diamine chain extender, hyamine and guanidinium composite reaction type antibacterial functional monomers and s-triazine are subjected to copolycondensationto synthesize the composite antibacterial polyurethane block polymer. According to the preparation method, di-hydroxyl hyamine and polyhexamethylene guanidine are grafted into a polyurethane main chain, the two types of antibacterial agents are compounded in use, and the advantages of the two antibacterial agents are given full play to respectively. While the polyurethane material modified throughthe complex of the hyamine and the guanidinium reserves the original advantages of polyurethane, the antibacterial property and the lasting antibacterial performance of the polyurethane are improved,but the mechanical property is slightly reduced; in order to solve the problem that the mechanical property is reduced, the antibacterial agent s-triazine is added, the s-triazine contains three hydroxy groups which can react with -NCO, the mechanical property of the PU can be improved, and safe, nontoxic and long-acting antibacterial effects are achieved.

Description

technical field [0001] The invention belongs to antibacterial agent modified polyurethane materials, in particular to a composite antibacterial polyurethane block polymer and its preparation and application. Background technique [0002] Polyurethane (PU), namely polyurethane formate, is a polymer containing many repeating carbamate groups (-NHCOO-) on the main chain of the polymer, and is usually formed by stepwise polymerization of polyisocyanate and polyol. made. Polyurethane is composed of a soft segment (soft segment) whose glass transition temperature is lower than room temperature and a rigid segment (hard segment) whose glass transition temperature is higher than room temperature. [0003] While polyurethane has good mechanical properties, its structure has amide groups and ester groups similar to those of human proteins, and it has good biocompatibility. Applications in fields such as medical materials and food packaging have attracted attention. However, during ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/32C08G18/40C08G18/48C08G18/64
CPCC08G18/3819C08G18/3851C08G18/4018C08G18/4804C08G18/64C08G18/6685
Inventor 陈汉佳周新婷石旭华
Owner SHANTOU UNIV
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