Antibacterial polymer-based waterproof coating and preparation method thereof

A technology of waterproof coatings and polymers, applied in the direction of antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of reduced waterproof performance, easy growth of bacteria and deterioration, etc., to achieve optimized film-forming performance, good Bioactivity and antibacterial effect, uniform particle size effect

Inactive Publication Date: 2021-02-26
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the current problems that polymer waterproof coatings are easy to grow bacteria and deteriorate in humid environments, resulting in reduced waterproof performance and the existing antibacterial coatings in the prior art, the present invention proposes an antibacterial polymer-based waterproof coating and its preparation method

Method used

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  • Antibacterial polymer-based waterproof coating and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0030] After adding 3 parts by weight of sodium hydrogen phosphate into 10 parts by weight of water to dissolve, continue to add 2 parts by weight of nano-silver and 2 parts by weight of nano-zinc oxide to stir and disperse, and then slowly add 5 parts by weight of chitosan acetic acid solution with a mass concentration of 10%. , after mixing evenly, add 5 parts by weight of saturated calcium nitrate solution dropwise at a constant speed, adjust the pH to 11 with ammonia water after the dropwise addition, continue stirring for 1 hour, let stand at room temperature for 10 hours, filter and then vacuum dry at 100 ° C, pulverize Pass through a 100-mesh sieve to obtain the chitosan-calcium hydroxyphosphate composite material loaded with nano-silver and nano-zinc oxide antibacterial agent. 1 part by weight of antibacterial agent and 30 parts by weight of acrylic acid emulsion with a solid content of 57%, 30 parts by weight of acrylic acid emulsion with a solid content of 55%, 0.2 pa...

Embodiment 2

[0032] After adding 4 parts by weight of sodium hydrogen phosphate to 12 parts by weight of water to dissolve, continue to add 3 parts by weight of nano-silver and 3 parts by weight of nano-zinc oxide to stir and disperse, and then slowly add 6 parts by weight of chitosan acetic acid solution with a mass concentration of 10%. , after mixing evenly, add 6 parts by weight of saturated calcium nitrate solution dropwise at a constant speed, adjust the pH to 10 with ammonia water after the dropwise addition, continue stirring for 2 hours, let stand at room temperature for 11 hours, filter and then vacuum dry at 100 ° C, pulverize Pass through a 100-mesh sieve to obtain the chitosan-calcium hydroxyphosphate composite material loaded with nano-silver and nano-zinc oxide antibacterial agent. 2 parts by weight of antibacterial agent and 33 parts by weight of acrylic acid emulsion with a solid content of 57%, 32 parts by weight of acrylic acid emulsion with a solid content of 55%, 0.3 pa...

Embodiment 3

[0034] After adding 6 parts by weight of sodium hydrogen phosphate into 15 parts by weight of water to dissolve, continue to add 4 parts by weight of nano-silver and 4 parts by weight of nano-zinc oxide to stir and disperse, and then slowly add 8 parts by weight of chitosan acetic acid solution with a mass concentration of 10%. , after mixing evenly, add 8 parts by weight of saturated calcium nitrate solution dropwise at a constant speed, adjust the pH to 10 with ammonia water after the dropwise addition, continue stirring for 1 hour, let stand at room temperature for 10 hours, filter and then vacuum dry at 100 ° C, pulverize Pass through a 100-mesh sieve to obtain the chitosan-calcium hydroxyphosphate composite material loaded with nano-silver and nano-zinc oxide antibacterial agent. 3 parts by weight of antibacterial agent and 36 parts by weight of propylene styrene emulsion with a solid content of 57%, 35 parts by weight of acrylic acid emulsion with a solid content of 55%, ...

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Abstract

The invention discloses an antibacterial polymer-based waterproof coating and a preparation method thereof. An antibacterial agent material with good biological activity and antibacterial effect is obtained by loading nano-silver and nano-zinc oxide on an in-situ synthesized chitosan hydroxyl calcium phosphate composite material, and then is added into a polymer-based waterproof coating formula toobtain the antibacterial polymer-based waterproof coating. The chitosan hydroxyl calcium phosphate loaded nano-silver and nano-zinc oxide antibacterial agent synthesized in situ is uniform in particle size and good in dispersity, can firmly load nano-particles, cannot fall off from a load body and cannot be agglomerated again, and the chitosan hydroxyl calcium phosphate loaded nano-silver and nano-zinc oxide antibacterial agent synthesized in situ has good compatibility with the polymer so that when the coating is prepared, the antibacterial additive is not separated from a polymer matrix substance, and the performance and the antibacterial effect of the coating are not reduced; meanwhile, the chitosan-modified antibacterial agent has optimized film-forming property when being added intothe coating for use.

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to an antibacterial polymer-based waterproof coating and a preparation method thereof. Background technique [0002] Polymer cement-based waterproof coatings in waterproof coatings are composed of emulsions synthesized by various water-based polymers and high-quality cement mixed with various additives. The flexibility of polymers and the rigidity of cement are integrated, making it impermeable and stable Excellent performance in performance, durability, etc., and convenient construction, low overall cost, non-toxic and environmentally friendly. However, many waterproof coatings are used in humid and dark environments. In such environments, the organic components in the coatings are prone to breed various bacteria and molds, resulting in deterioration of waterproof coatings and reduced waterproof performance. If left untreated for a long time, the paint will lose its waterproof p...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D131/04C09D7/62C09D5/14
CPCC08K2003/0893C08K2003/2296C08K2201/011C08L2205/035C09D5/14C09D133/04C09D7/62C08L31/04C08L1/284C08K13/06C08K9/12C08K3/08C08K3/22C08K3/34C08K3/36
Inventor 陈庆陈巧和司文彬白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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