CN104179016A - Antibacterial composite coating for fabric and preparation method thereof - Google Patents

Abstract

An antibacterial composite coating for fabric and a preparation method thereof. The antibacterial composite coating consists of a base material coating and a surface coating. The base material coating comprises the following raw materials in parts by weight: 60-70 parts of unsaturated polyester resin, 4-5 parts of silver-coated copper powder, 3-8 parts of 1, 4-butanediol, 10-13 parts of triethylamine, 1-3 parts of nano zinc oxide and 0.2-0.5 part of jade powder; the surface coating comprises the following raw materials in parts by weight: 10-15 parts of polyvinyl alcohol, 10-15 parts of tea tree oil, 8-9 parts of zinc sulfide, 1-5 parts of butadiene-styrene, 0.1-1.3 parts of adipate polyester plasticizer, 1-4 parts of magnesium-containing alumina and 0.2-0.6 part of fumed silica. The fabric coating has good antibacterial performance and is harmless to human bodies.

Description

Antibacterial composite coating for fabric and preparation method thereof

the

technical field

The invention belongs to the field of antibacterial coatings, and relates to an antibacterial composite coating for fabrics and a preparation method thereof. the

Background technique

With the improvement of living standards, people pay more and more attention to the quality of life, hoping to obtain comfortable clothing and a healthy living environment. The requirements for various textiles are getting higher and higher, especially the formation of "green" concepts such as safety, security, comfort, health, hygiene, and cleanliness, which makes the antibacterial, mildew-proof, and deodorant finishing of textiles more popular among people. Pay attention to. the

In life, people inevitably come into contact with various bacteria, fungi and other microorganisms. Under suitable external conditions, these microorganisms will multiply rapidly and spread diseases through contact and other ways, affecting people's health and normal life. Work, study and live. Fiber is a porous material, and after superposition and weaving, it will form a multi-layer body with numerous voids, so the fabric is easier to absorb fungi. Antibacterial finishing is to make the fabric have the function of inhibiting the growth of fungi, maintain a hygienic clothing and living environment, and ensure human health. the

In the 21st century, with the advent of an aging society, the number of elderly people who are bedridden and recuperating at home is gradually increasing, and the demand for elderly care products to prevent bedsores is also increasing. Due to the transition from a production-based society to a life-based concept, it will be an important issue in the future to develop and research products that are beneficial to human health and the global environment. Therefore, antibacterial finishing is increasingly valued by people. the

In the 1960s, people mostly used organic antibacterial agents to produce antibacterial textiles; with the successful development of inorganic antibacterial agents in 1984, antibacterial finishing developed rapidly, making antibacterial agents not only used in fibers and textiles, but also in plastics and building materials etc. products. At present, Japan is the most active in antibacterial and deodorant research, with leading technology, and its products have expanded to sportswear, carpets, medical supplies and other fields. In recent years, the focus of antimicrobial research has shifted from protecting textiles from bacteria to protecting the environment and users from bacteria. 

At present, there are three main antibacterial mechanisms: controlled release, regenerative principle, and barrier or blocking effect. CN2011104017686 relates to a high-efficiency, environment-friendly, antibacterial and anti-virus inorganic composite nano-coating and a preparation method thereof, including inorganic composite nano-antibacterial agent concentrated slurry, negative ion powder, emulsion and the like. The disadvantage of this technology is that the raw materials used are many and complicated, and the coatings such as maleic anhydride dust and steam are obviously irritating, which can cause pharyngitis, bronchitis, etc. after inhalation, and direct contact with the skin has obvious irritating effects and causes burns.

Contents of the invention

The object of the present invention is exactly to aim at above-mentioned technical defect, provides a kind of antibacterial composite coating for fabric, and this fabric coating has good antibacterial property, and is harmless to human body. the

Another object of the present invention is to provide a method for preparing an antibacterial composite coating for fabrics, which has simple process, low production cost and good industrial applicability. the

The present invention is achieved by the following technical means:

An antibacterial composite paint for fabric is characterized in that it is composed of base paint and surface paint.

An antibacterial composite coating for fabrics as described above, characterized in that: the base coating comprises the following raw materials in parts by weight: 60-70 parts of unsaturated polyester resin, 4-5 parts of silver-coated copper powder, 3 parts -8 parts of 1,4-butanediol, 10-13 parts of triethylamine, 1-3 parts of nano zinc oxide, 0.2-0.5 parts of jade powder; the surface coating includes the following raw materials in parts by weight: 10-15 parts Polyvinyl alcohol, 10-15 parts of tea tree oil, 8-9 parts of zinc sulfide, 1-5 parts of butadiene-styrene, 0.1-1.3 parts of adipate polyester plasticizer, 1-4 parts of magnesium Alumina, 0.2-0.6 parts fumed silica. the

An antibacterial composite coating for fabrics as described above is characterized in that: the substrate coating also includes a composite filler, and the composite filler is calcined kaolin modified with an aluminum-titanium composite coupling agent. the

An antibacterial composite coating for fabrics as described above, characterized in that: the filler is calcined kaolin modified with an aluminum-titanium composite coupling agent, and the preparation method is: drying the kaolin at 80°C before modification 10 hours, then mixed with the aluminum-titanium composite coupling agent according to the mass ratio of 97:1, and finally stirred at a high speed in a mixing mixer at 100 ° C, wherein the aluminum-titanium composite coupling agent is a commercially available product, purchased from Shanxi Chemical Research Institute , the grade is OL-AT1618. 

A kind of preparation method of antibacterial composite coating for fabric as above, it is characterized in that it is carried out as follows: Prepare substrate coating: first 1/3 unsaturated polyester resin and 1,4-butanediol, triethylene glycol Mix the amine components and stir evenly at a stirring speed of 380-470r/min, then add the remaining unsaturated polyester resin and nano-zinc oxide and stir evenly at a stirring speed of 350-400r/min; add dry and ground The silver-coated copper powder and the remaining ingredients are stirred at a stirring speed of 1000-2000r/min for 10-20 minutes, and the substrate coating is obtained after defoaming;

Preparation of surface coating: fully grind zinc sulfide with appropriate amount of water, add dilute inorganic acid to adjust the pH value to 5-6, add polyvinyl alcohol and fumed silica and stir at 30-40°C for 10-20 minutes, add caustic soda to adjust the pH value To neutrality, continue to stir at a stirring speed of 350-400r/min and at the same time add the remaining raw materials for mixing, and obtain a surface coating after defoaming.

An application of the above-mentioned antibacterial composite coating for fabrics on the fabric coating, characterized in that: after the substrate coating is scraped repeatedly on the fabric for 1-3 times, the thickness is 100-150um, and it is baked at 100-150°C Dry for 2-5 minutes; then brush the surface coating 1-3 times, the thickness of the coating is 150-270um, put it in a cool place for 12-15 hours to dry, and fully cure to form an antibacterial coating. the

The unsaturated polyester resin used in the present invention is a 191 series unsaturated polyester resin, and the dilute inorganic acid can be selected from industrial-grade hydrochloric acid with a concentration of 10-15%, and dilute nitric acid with a concentration of 35-40%. the

Compared with traditional antibacterial coatings, the combined use of substrate coatings and surface coatings has the advantages of enhanced antibacterial effect, improved antibacterial durability, good stability and practicability. the

The benefit of batch mixing and choosing a specific mixing speed is that it mixes the composite paint better than other methods.

The adipate ester polyester used in the present invention is dioctyl adipate, n-octyl-n-decyl adipate, 2-n-hexyl adipate etc., adopt above material, when the coating that produces is applied to fabric, It has the advantages of high plasticizing efficiency, small migration, good heat resistance, and excellent durability. the

The fumed silica used in the present invention has a relatively high specific surface area, and can play the roles of thickening, anti-sedimentation, matting and reinforcement in the coating. Due to the hydrogen bonding on the surface of fumed silica, a three-dimensional cross-linked network can be formed in the coating system, so that the viscosity of the coating is increased, the use is stable, and it has excellent processing performance in practical applications. the

Example

Some sources of raw materials:

Silver-coated copper powder (shape: flake; particle size: 10-15um; silver powder content: 19-21%) is purchased from Shanghai Danze Metal Powder Co., Ltd.

The aluminum-titanium composite coupling agent is a commercially available product purchased from Shanxi Institute of Chemical Industry with the brand name OL-AT1618.

Example 1

The preparation of the substrate coating comprises the following raw materials by weight: 60 parts of unsaturated polyester resin, 5 parts of silver-coated copper powder, 3 parts of 1,4-butanediol, 10 parts of triethylamine, 3 parts of nano-zinc oxide, 0.2 parts of jade powder;

Prepare the surface coating and include the following raw materials in parts by weight: 10 parts of polyvinyl alcohol, 15 parts of tea tree oil, 9 parts of zinc sulfide, 1 part of butadiene-styrene, 1.3 parts of adipate ester polyester plasticizer, 4 parts Parts of magnesium-containing alumina, 0.2 parts of fumed silica.

To carry out antibacterial composite coating treatment on polyester fabric, adopt the following steps:

After scraping the substrate paint on the fabric 3 times repeatedly, the thickness is 150um, and drying at 150°C for 5 minutes; then brush the surface paint 3 times, the thickness of the coating is 270um, put it in a cool place for 15 hours to dry, fully Cures to form an antimicrobial coating.

Example 2

The preparation of the substrate coating includes the following raw materials in parts by weight: 65 parts of unsaturated polyester resin, 4 parts of silver-coated copper powder, 7 parts of 1,4-butanediol, 10 parts of triethylamine, 3 parts of nano-zinc oxide, 0.5 parts of jade powder, 0.3 parts of calcined kaolin modified by aluminum-titanium composite coupling agent;

Prepare the surface coating and include the following raw materials in parts by weight: 13 parts of polyvinyl alcohol, 13 parts of tea tree oil, 8 parts of zinc sulfide, 5 parts of butadiene-styrene, 1.3 parts of adipate ester polyester plasticizer, 4 parts Parts of magnesium-containing alumina, 0.4 parts of fumed silica.

To treat pure cotton fabrics with antibacterial composite coatings, the following steps are adopted:

After scraping the substrate paint on the fabric 3 times repeatedly, the thickness is 130um, and drying at 150°C for 4 minutes; then brush the surface paint 1 time, the thickness of the coating is 150um, put it in a cool place for 12 hours to dry, fully Cures to form an antimicrobial coating.

comparative example

The preparation of antibacterial coatings includes the following raw materials by weight: 60 parts of unsaturated polyester resin, 3 parts of 1,4-butanediol, 10 parts of triethylamine, 3 parts of nano-zinc oxide, 0.2 parts of jade powder, 10 parts of Polyvinyl alcohol, 1 part of butadiene-styrene, 1.3 parts of adipate polyester plasticizer.

To carry out antibacterial composite coating treatment on polyester fabric, adopt the following steps:

After repeatedly scraping the paint on the fabric for 4 times, the thickness is 160um, dried at 100°C for 6 minutes, the thickness of the coating is 270um, placed in a cool place for 15 hours to dry, and fully cured to form an antibacterial coating.

The antibacterial properties of the treated fabrics were tested by the People's Republic of China Textile Industry Standard Fabric Antibacterial Performance Test Method as shown in Table 1. the

Table 1 Antibacterial test results

In addition, the results show that the fabric after antibacterial finishing can basically kill Staphylococcus aureus, Staphylococcus epidermidis, Bacillus cereus, Streptococcus, Pneumococcus, Meningococcus, Neisseria gonorrhoeae, Escherichia coli, Shigella, Salmonella typhi, pneumonia Bacillus, Pseudomonas aeruginosa, Bacillus subtilis, Epidermophyton flocculus, Trichophyton gypsum, Candida albicans, Penicillium, Aspergillus niger and other harmful bacteria. Neisseria gonorrhoeae (941748 domestic strains), Neisseria gonorrhoeae (WHO Q6 international standard drug-resistant strain), Staphylococcus aureus (ATCC 6389), Escherichia coli (ATCC 8099), Candida albicans (ATCC l0231), Microsporum gypsum , flocculent epidermophyton, trichophyton rubrum, subtilis black variant spores (ATCC 9372), etc. do not grow at all on antibacterial fabrics that have not been washed or washed 50 times, and the antibacterial rate reaches more than 90%. The antibacterial composite coating of the present invention The finished fabric has excellent washing resistance.

Claims (6)

1. an antibacterial composite coating for fabric is characterized in that it is made up of base coating and surface coating. 2. a kind of antibacterial composite coating for fabric as claimed in claim 1, is characterized in that: The base coating includes the following raw materials in parts by weight: 60-70 parts of unsaturated polyester resin, 4-5 parts of silver-coated copper powder, 3-8 parts of 1,4-butanediol, 10-13 parts Triethylamine, 1-3 parts of nano zinc oxide, 0.2-0.5 parts of jade powder; The surface coating comprises the following raw materials in parts by weight: 10-15 parts of polyvinyl alcohol, 10-15 parts of tea tree oil, 8-9 parts of zinc sulfide, 1-5 parts of butadiene-styrene, 0.1-1.3 parts of hexyl Diacid ester polyester, 1-4 parts of magnesium-containing alumina, 0.2-0.6 parts of fumed silica. 3. An antibacterial composite coating for fabrics as claimed in claim 2, characterized in that: the base material coating also includes a composite filler, and the composite filler is calcined kaolin modified with an aluminum-titanium composite coupling agent. 4. an antibacterial composite paint for fabric as claimed in claim 3, is characterized in that: described filler is the calcined kaolin that adopts aluminum-titanium composite coupling agent to modify, and its preparation method is: kaolin is mixed in before modification Dry at 80°C for 10 hours, then mix with the aluminum-titanium composite coupling agent at a mass ratio of 97:1, and finally stir at a high speed in a mixing mixer at 100°C, wherein the aluminum-titanium composite coupling agent is a commercially available product, purchase in Shanxi Institute of Chemical Industry. 5. a preparation method of antibacterial composite coating for fabric as claimed in claim 1-4, is characterized in that carrying out as follows: Preparation of substrate coating: first mix one-third of unsaturated polyester resin with 1,4-butanediol and triethylamine components, stir evenly at a stirring speed of 380-470r/min, and then add the remaining Stir the unsaturated polyester resin and nano-zinc oxide at a stirring speed of 350-400r/min evenly; add the dry and ground silver-coated copper powder and the remaining ingredients, and then stir at a stirring speed of 1000-2000r/min for 10-20 Minutes, get the substrate coating after degassing; Preparation of surface coating: fully grind zinc sulfide with appropriate amount of water, add dilute inorganic acid to adjust the pH value to 5-6, add polyvinyl alcohol and fumed silica and stir at 30-40°C for 10-20 minutes, add caustic soda to adjust the pH value To neutrality, continue to stir at a stirring speed of 350-400r/min and at the same time add the remaining raw materials for mixing, and obtain a surface coating after defoaming. 6. the application of an antibacterial composite paint on fabric coating as claimed in claim 1-4, is characterized in that: After scraping the substrate paint on the fabric repeatedly for 1-3 times, the thickness is 100-150um, and drying at 100-150°C for 2-5 minutes; Then brush the surface paint 1-3 times, the thickness of the coating is 150-270um, put it in a cool place for 12-15 hours to dry, and fully cure to form an antibacterial coating.