CN1284837C - Water-based antibacterial wood varnish - Google Patents

Abstract

The invention discloses a water-based antibacterial wood varnish. The main components of the paint and their weight proportions are: 55%-90% of water-based resin with a solid content of 25%-50%, 0.05%-2.5% of a defoamer, Dispersant 0.05%～5%, thickener 0.1%～2%, leveling agent 0.1%～1%, antifreeze 1%～10%, antibacterial agent 0.5%～10%, film-forming aid 1%～6 % and water 0-40%. The water-based antibacterial wood varnish of the present invention can be coated on the surface of wood products such as wooden furniture and wooden floors to form an antibacterial film, which can inhibit and kill a variety of common bacteria. It has high antibacterial efficiency, long-lasting drug effect, low cost and good decorative effect And the construction is simple, and can be widely used in the coating of modern wooden furniture or the decoration of homes and offices.

Description

Water-based antibacterial wood varnish

technical field

The invention relates to a water-based wood coating, in particular to a matte or bright water-based antibacterial wood varnish.

Background technique

There are harmful bacteria on the surface of wood products such as wooden furniture and wooden floors. In order to keep the surface of the products hygienic, external measures are usually taken, such as spraying drugs, wiping drugs, etc. Its disadvantages are easy loss of medicines, easy regeneration of bacteria, short antibacterial time, low antibacterial efficiency and high cost.

Contents of the invention

The technical problem to be solved by the present invention is to provide a water-based antibacterial wood varnish which is not easy to lose medicine, has long-lasting antibacterial ability, high efficiency and low cost.

The technical solution of the present invention to solve the above-mentioned technical problems is to adopt a water-based antibacterial wood varnish, the main components of the paint and their weight ratios are: 55%-90% water-based resin with a solid content of 25%-50%, disinfectant Foaming agent 0.05%-2.5%, dispersant 0.05%-5%, thickener 0.1%-2%, leveling agent 0.1%-1%, antifreeze 1%-10%, isothiazolinone antibacterial agent 0.5 %-10%, film-forming aid 1%-6%, and water 0-40%; wherein the water-based resin is water-based polyurethane dispersion, or polyacrylate emulsion or their mixture.

When the components of the paint do not contain a matting agent, the prepared paint is a bright paint, and when a matte paint needs to be prepared, a matting agent with a weight ratio of 0-15% must be added.

When preparing matte paint, the components used in the paint and their weight ratios are: 78% of water-based resin with a solid content of 32%, 1.5% of defoamer, 1.5% of dispersant, 0.7% of thickener, fluid 0.3% leveling agent, 2% antifreeze, 4% isothiazolinone antibacterial agent, 3% film-forming aid, 4% matting agent and 5% water.

Among the above components, the defoamer is polysiloxane-polyether copolymer emulsion, polypropylene glycol, polyethylene glycol-hydrophobic solid-polysiloxane mixture, mineral oil base or their mixture; the dispersant is polyacrylic acid ammonium salts, modified polyacrylic acid solutions, modified polycarboxylates or mixtures thereof; the thickener is non-ionic polyurethane associative type, alkali-swellable emulsion non- Association type, hydrophobic alkali swelling emulsion association type or their mixture; the film-forming aid is 2,2,4-trimethyl-1,3-pentanediol-monoisobutyrate, propylene glycol Methyl ether, propylene glycol butyl ether, diethylene glycol butyl ether or their mixtures; the antifreeze is propylene glycol or ethylene glycol or their mixtures; the matting agent is organic modified fumed silica, fumed Silicone, matting wax emulsions or their mixtures.

The specific components used in the paint are as follows: the water-based resin uses water-based polyurethane dispersion, the defoamer uses polyethylene glycol-hydrophobic solid-polysiloxane mixture, and the dispersant uses polyacrylic acid ammonium salt The thickener uses non-ionic polyurethane associative type, the leveling agent uses polysiloxane-polyether copolymers, the matting agent uses organic modified fumed silica, and the composition The membrane aid uses propylene glycol butyl ether, and the antifreeze agent uses propylene glycol.

Compared with the prior art, the water-based antibacterial wood varnish of the present invention is to add film-forming substances and antibacterial agents in the coating additives, which can form antibacterial films on the surfaces of wood products such as wooden furniture and wooden floors, thereby preventing various common bacteria. It has antibacterial effect, and because the drug is sealed by the paint film and is not easy to lose, it has high-efficiency and long-lasting antibacterial ability. According to the test of Guangdong Institute of Microbiology, its antibacterial efficiency is 99.99%, and the antibacterial persistence is greater than 95%, and the cost is low. Good decorative effect, easy construction.

Detailed ways

The present invention will be further described below in conjunction with embodiment.

The water-based antibacterial wood varnish of the present invention can be divided into two types: matte and glossy, wherein the components of the glossy paint and their weight ratios are: 55%-90% of water-based resin with a solid content of 25%-50%, defoaming agent 0.05%～2.5%, dispersant 0.05%～5%, thickener 0.1%～2%, leveling agent 0.1%～1%, antifreeze 1%～10%, antibacterial agent 0.5%～10%, film forming 1% to 6% of additives and 0% to 40% of water. For matt paint, add 0% to 15% matting agent to the above components.

Among the above components:

The water-based resin can be self-produced or can use the water-based polyurethane dispersion produced by Jieyang Tianyin Chemical Co., Ltd. or Shunde New Oriental Chemical Co., Ltd., or polyacrylate emulsion, other water-based resins, other emulsions, or their mixture;

Described antifoaming agent can adopt polysiloxane-polyether copolymer emulsion class, as the TEG0805 that German Tego Chemical Co., Ltd. produces; Polypropylene glycol, as the Pluriol P 2000 that German BASF Chemical Co., Ltd. produces; Polyethylene glycol -Hydrophobic solid-polysiloxane mixtures, such as BYK024 produced by German BYK Chemical (Asia Pacific) Private Limited; mineral oil-based products, such as Foamster309A produced by Shenzhen Haichuan Chemical Co., Ltd., etc. or their mixtures.

Described dispersant can adopt polyacrylic acid ammonium salt class, as the Hydropalat640A that Shenzhen Haichuan Chemical Co., Ltd. produces; Such as Sokalan PA30CL produced by BASF Chemical Co., Ltd., Germany, etc. or their mixtures.

The thickener can adopt non-ionic polyurethane associative type, such as PU40 produced by Shenzhen Mingjia Technology Co., Ltd.; non-associative type of alkali swelling emulsion, such as RM-2020 and ACRYSOL ASE produced by Rohm and Haas Company of the United States. -60; Hydrophobic alkali-swellable emulsion association type, such as ACRYSOL DR-1 produced by Rohm and Haas Company of the United States, etc. or their mixtures.

The anti-edge shrinkage agent can be polysiloxane-polyether copolymers produced by German Tego Chemical Co., Ltd., such as TEG0245 and the like.

The leveling agent can be polysiloxane-polyether copolymer produced by German Tego Chemical Co., Ltd., such as TEGOGlide450; high molecular weight dimethyl polysiloxane emulsion, such as TEGO Glide482, etc.

The matting agent can be organic modified fumed silica, such as ED30 produced by U.S. Grace Company; or fumed silica, such as matting agent 938 produced by Guangdong Yangshan Weida Chemical Co., Ltd.; matting wax emulsion , such as BYK263 produced by German BYK Chemicals (Asia Pacific) Private Limited, etc. or their mixtures.

The antifreeze can be propylene glycol or ethylene glycol or their mixtures produced by American Dow Chemical Pacific Co., Ltd. or Guangzhou Deyuan Trading Co., Ltd.

The antibacterial agent can adopt the isothiazolinone antibacterial agent, nanometer inorganic antibacterial agent, silver ion antibacterial agent, etc. or their mixture produced by Japan SR Commercial Co., Ltd. or Anshan Yuyuan Wangjiao Antibacterial Agent Company.

The film-forming aid can adopt 2,2,4-trimethyl-1,3-pentanediol-monoisobutyrate, Propylene Glycol Methyl Ether, Propylene Glycol Butyl Ether, Diethylene Glycol Butyl Ether or their mixtures.

Components and weight ratios thereof that are specifically adopted in the water-based antibacterial wood varnish (matte) of the present invention can be:

Formula 1. Waterborne polyurethane dispersion (solid content: 32%) is 78%, polyethylene glycol-hydrophobic solid-polysiloxane mixture defoamer BYK024 is 1.5%, polyacrylic acid ammonium salt dispersant Hydropalat 640A 1.5%, non-ionic polyurethane associative thickener RM-2020 is 0.7%, polysiloxane-polyether copolymer leveling agent TEGO Glide450 is 0.3%, organic modified fumed silica matting agent 4% of ED30, 2% of propylene glycol antifreeze, 4% of isothiazolinone antibacterial agent, 3% of propylene glycol butyl ether coalescent and 5% of water.

Formula 2, water-based polyurethane dispersion (solid content: 32%) is 70%, polyethylene glycol-hydrophobic solid-polysiloxane mixture defoamer BYK024 is 1%, polyacrylate ammonium salt dispersant Hydropalat 640A 2%, non-ionic polyurethane associative thickener RM-2020 is 1.2%, polysiloxane-polyether copolymer leveling agent TEGO Glide450 is 0.6%, organic modified fumed silica matting agent ED30 is 6.2%, propylene glycol antifreeze is 4%, isothiazolinone antibacterial agent is 3%, propylene glycol butyl ether coalescent is 2%, and water is 10%.

Among them, formula one is the best formula.

Components and weight ratios thereof that are specifically adopted in the water-based antibacterial wood varnish (bright light) of the present invention can be:

Formula 1. Waterborne polyurethane dispersion (solid content: 32%) is 78%, polyethylene glycol-hydrophobic solid-polysiloxane mixture defoamer BYK024 is 1.5%, polyacrylic acid ammonium salt dispersant Hydropalat 640A 1.5%, non-ionic polyurethane associative thickener RM-2020 is 0.7%, polysiloxane-polyether copolymer leveling agent TEGO Glide450 is 0.3%, propylene glycol antifreeze is 2%, isothiazoline 4% ketone antibacterial agent, 3% propylene glycol butyl ether coalescence aid and 9% water.

Formula 2, water-based polyurethane dispersion (solid content: 32%) is 70%, polyethylene glycol-hydrophobic solid-polysiloxane mixture defoamer BYK024 is 1%, polyacrylate ammonium salt dispersant Hydropalat 640A 2%, non-ionic polyurethane associative thickener RM-2020 is 1.2%, polysiloxane-polyether copolymer leveling agent TEGO Glide450 is 0.6%, propylene glycol antifreeze is 4%, isothiazoline Ketone antibacterial agent is 3%, propylene glycol butyl ether film-forming aid is 2% and water is 16.2%.

When preparing, fully disperse the water-based resin, antifreeze agent, defoamer, dispersant, leveling agent, film-forming aid and other coating additives, and then add isothiazolinone antibacterial agent to disperse evenly. When painting, you can add appropriate amount of water to adjust the viscosity according to the specific situation, and then apply the paint to the surface of furniture, wooden floors and other wood products by brushing or spraying to fully seal it.

After testing, the main quality technical index of water-based antibacterial wood varnish of the present invention is as follows: serial number Test items test result Testing method 1 Coating Appearance Flat and smooth surface visual inspection 2 Drying time (25℃) surface dry 40min GB/T 1728-89 (method B) hard work ≤24h GB/T 1728-89 (Method A) 3 Adhesion ≤Level 3 GB/T9286-1998 4 Hardness (pencil method, 72h) HB GB/T 6739-1996 (Method A) 5 Pendulum hardness ≥0.36 GB/T1730-1993 6 Water resistance (25℃, 24h) Non-foaming, non-flaking, non-wrinkling, slight blushing allowed, restorable GB/T 1733-93 (A method) 7 Heat resistance (60℃, 2h) no change GB/T1735-79 8 Volatile Organic Compounds (VOCs) ≤250g/L HBC12-2002 9 Impact resistance, kg·cm ≥45 GB/T1732-1993 10 Flexibility, mm ≤2 GB/T1731-1993

Claims (8)

1. A water-based antibacterial wood varnish, characterized in that: the main components of the paint and their weight ratios are: 55%-90% of water-based resin with a solid content of 25%-50%, and 0.05%-2.5% of a defoamer %, dispersant 0.05%~5%, thickener 0.1%~2%, leveling agent 0.1%~1%, antifreeze agent 1%~10%, isothiazolinone antibacterial agent 0.5%~10%, component 1%-6% of film aid and 0-40% of water; wherein the water-based resin is water-based polyurethane dispersion, or polyacrylate emulsion or their mixture. 2. The water-based antibacterial wood varnish according to claim 1, characterized in that: the varnish further comprises a matting agent with a weight ratio of 0-15%. 3. The water-based antibacterial wood varnish according to claim 2, characterized in that: the components of the paint and their weight ratios are: 78% of water-based resin with a solid content of 32%, 1.5% of defoaming agent, dispersant 1.5%, thickener 0.7%, leveling agent 0.3%, antifreeze 2%, isothiazolinone antibacterial agent 4%, film-forming aid 3%, matting agent 4% and water 5%. 4. The water-based antibacterial wood varnish according to claim 1, 2 or 3, characterized in that: the defoamer is polysiloxane-polyether copolymer emulsion, polypropylene glycol, polyethylene glycol-phobic Water solids-polysiloxane hybrids, mineral oil based or mixtures thereof. 5. The water-based antibacterial wood varnish according to claim 1, 2 or 3, characterized in that: the dispersant is polyacrylic acid ammonium salt, modified polyacrylic acid solution, modified polycarboxylate or their Mixture; the thickener is non-ionic polyurethane associative type, alkali-swellable emulsion non-associative type, hydrophobic alkali-swellable emulsion associative type or their mixture. 6. The water-based antibacterial wood varnish according to claim 1, 2 or 3, characterized in that: the film-forming aid is 2,2,4-trimethyl-1,3-pentanediol-monoisobutyl Ester, propylene glycol methyl ether, propylene glycol butyl ether, diethylene glycol butyl ether or their mixtures; the antifreeze is propylene glycol or ethylene glycol or their mixtures. 7. The water-based antibacterial wood varnish according to claim 2 or 3, characterized in that: the matting agent is organic modified fumed silica, fumed silica, matting wax emulsion or a mixture thereof. 8. The water-based antibacterial wood varnish according to claim 3, characterized in that: the water-based resin is water-based polyurethane dispersion, the defoamer is polyethylene glycol-hydrophobic solid-polysiloxane mixture, The dispersant is polyacrylic acid ammonium salt, the thickener is nonionic polyurethane associative type, the leveling agent is polysiloxane-polyether copolymer, and the matting agent is organic modified Fumed silicon dioxide, the film-forming aid uses propylene glycol butyl ether, and the antifreeze agent uses propylene glycol.