CN1580166A - Hydrophobic coating for fresh-retaining paperbox and its preparing method - Google Patents

Abstract

The invention relates to a kind of water proofing paint for preserving carton and the preparation method. The composition follows this by weight. Wax mixture is 10-30 share, non ionic emulsifier is 1-8 share, third silicone resin emulsion is 10-30 share and quality silicone oils is 0-5 share. After fine grind the mixture of inorganic nanometer photocatalyst, dispersing agent and part of non ionic emulsifier, mix the outcome with wax mixture, the remainder non ionic emulsifier and quality silicone oils and then heat up and add boiling water with stirring-up. After this, add third silicone resin emulsion to force to produce a little lacto and remainder water, cool with stirring-up to produce the end product. The invention is fit to be operate in flow line production and it can defend water efficiently. The dosing is little and it can not give off noxious gas. Besides, it can kill bacterium and preserve stuff.

Description

Fresh-keeping corrugated box is with refusing water paint and preparation method thereof

Technical field: the invention belongs to a kind of coating, be specifically related to a kind of fresh-keeping corrugated box with refusing water paint and preparation method thereof.

Background technology: traditional fresh-keeping corrugated box comprises two big classes with refusing water paint, and a class is a solvent-borne type, is characterized in that rate of drying is fast, and luminance brightness is good, but poisonous and harmful has peculiar smell, the cost height, thereby do not meet environmental requirement; Another kind of is water aqua type, and these product are nontoxic, no environmental protection problem, but exist rate of drying slow, film-forming properties is poor, can not adopt problems such as streamline moulding; It is CN1109084A that Chinese patent discloses publication number, and project name is the water aqua type coating of moistureproof coating for paper products and preparation method thereof, and it is not suitable for streamline production, refuses the water weak effect, and consumption is many.

Summary of the invention: the purpose of this invention is to provide and a kind ofly be suitable for streamline production, refuse that water is effective, goods are not easy to change in the technological process, and make carton have controlled atmosphere, decompose ethene, antibacterial, suppress the fresh-keeping corrugated box of functions such as fruits and vegetables breathing with refusing water paint.

Another object of the present invention provides a kind of fresh-keeping corrugated box preparation method who refuses water paint.

The present invention is achieved in that a kind of fresh-keeping corrugated box is with refusing water paint, it is made of by weight following material, wax mixture 10---30 part, nonionic emulsifier 1---8 part, organosilicon acrylic resin emulsion 10---30 part, modified silicon oil 0---5 part, inorganic nano photocatalyst 1---5 part, dispersion agent 0.5---2 part, surplus are water.

Realize that a kind of better mode of the present invention is that a kind of fresh-keeping corrugated box is with refusing water paint, it is made of by weight following material, wax mixture 15--25 part, nonionic emulsifier 2---5 part, organosilicon acrylic resin emulsion 15---25 part, modified silicon oil 0---5 part, inorganic nano photocatalyst 2---4 part, dispersion agent 1---1.8 part, surplus are water.

Realize a kind of best mode of the present invention be a kind of fresh-keeping corrugated box with refusing water paint, it is made of by weight following material, 20 parts of wax mixtures, 5 parts of nonionic emulsifier, 20 parts of organosilicon acrylic resin emulsions, 2 parts of modified silicon oils, 3 parts of inorganic nano photocatalysts, 1.5 parts of dispersion agents, surplus is a water.

A kind of fresh-keeping corrugated box of the present invention is with refusing water paint, and its described inorganic nano photocatalyst is for being matrix with the adulterated titanium-containing oxide of semiconductor material, and coated conjugated system organism on described matrix surface; Dispersion agent is that a kind of molecular weight is the macromolecular tensio-active agent of 2000----8000.

To achieve these goals, a kind of fresh-keeping corrugated box preparation method who refuses water paint of the present invention, it comprises following processing step:

A utilizes nano-photocatalyst, dispersion agent, part nonionic emulsifier and adopts behind the high speed dispersor premix nano-dispersed machine to be finely ground to require fineness;

B with a step mixture, wax mixture, remainder emulsifying agent, modified silicon oil thorough mixing, stirs under heating condition and is warming up to 145-150 ℃, makes its complete fusion, forms transparent melten gel;

C slowly adds boiling water, is stirred to 55-65 ℃, adds the organosilicon acrylic resin emulsion;

D adopts the high pressure homogenization machine to force micro emulsion, adds surplus water, stirs and is cooled to normal temperature;

E adopts high pressure homogenization machine second emulsifying, obtains finished product.

A kind of fresh-keeping corrugated box of the present invention is with wax mixture with refusing water paint, nonionic emulsifier, organosilicon acrylic resin emulsion, modified silicon oil, the inorganic nano photocatalyst, the dispersion agent of sodium rice titanium series photocatalyst is formed, the employing micro-emulsion technology is produced, its active particle particle diameter≤1um.Owing to adopted nano-photocatalyst, and nano-photocatalyst is for being matrix with the adulterated titanium-containing oxide of semiconductor material, and coated conjugated system organism on described matrix surface; Under the effect of dispersion agent, these product have does not have the light source requirements of initiation, and good anti-bacterial effect can be decomposed the thalline residue, and functions such as airborne organic gas are decomposed in photochemical catalytic oxidation; And can kill the microorganism that is in contact with it, decompose airborne a small amount of obnoxious flavour, as ethene, acetaldehyde, ethanol etc.

As follows through Performance Detection:

Outward appearance: pure white emulsion

Smell: tasteless

PH value: 7-9

Time of drying (min): surface drying 3

Thorough drying 30

Viscosity (s): 20 ± 5

Solid content (%): 40% (suggestion dilution during use)

Sticking power (level): Pyatyi

Thermotolerance (℃): 50 ℃ of no changes

Water tolerance: soaking 3hr does not have infiltration

Resin added (g/m ²): 30

Antibacterial effect detects:

For the examination microorganism strains	The sterilizing rate (%) of natural lighting antibiotic plastic film	The sterilizing rate (%) of poor light condition antibiotic plastic film
			Intestinal bacteria	????99.97	????99.92
Streptococcus aureus	????99.97	????96.94
			The mutation of subtilis black	????97.42	????92.75

Organic gas degradation experiment result:

Time (h)	Blank concentration of formaldehyde (mg/m 3)	Add concentration of formaldehyde (mg/m behind the material 3)	Purification efficiency (%)
				????0	????1.457	????1.457	????-
????1	????1.171	????0.263	????77.5
				????2	????0.994	????0.160	????83.9
????3	????0.869	????0.131	????84.9
				????4	????0.869	????0.091	????89.5
????5	????0.766	????0.074	????90.3
				????6	????0.686	????0.040	????94.2
????7	????0.680	????0.040	????94.1

Because adopt technique scheme, compared with the prior art fresh-keeping corrugated box of the present invention has following unusual effect with refusing water paint: 1, water repellency is good, consumption is few, product film forming rate of drying is fast, suitable fresh-keeping corrugated box streamline is produced; Thereby preserving fruit and vegetable utilizing had following positively effect;

2, can form one deck transparent wax protective layer as thin as a wafer at the carton internal surface, reduce the interior fruits and vegetables moisture evaporation of carton and scatter and disappear, and wax layer hardness be low, can reduce the surperficial corrupted that causes because of collision in fruit vegetables storing, the transportation again; Gases such as the ethene that produces when 3, decomposing the fruit storage, acetaldehyde, ethanol, reducing the fruits and vegetables that cause because of the above-mentioned gas dematuration rots; 4, kill the various attached microorganisms of posting, reduce the fruits and vegetables that cause because of microbial reproduction and rot.

Below in conjunction with specific embodiment method of the present invention is described further:

Embodiment: embodiment 1: taking by weighing with the adulterated titanium-containing oxide of semiconductor material is matrix, and coated 5 kilograms of conjugated system organism on described matrix surface, molecular weight is 0.5 kilogram in 2000 a macromolecular tensio-active agent, and 0.5 kilogram of nonionic emulsifier utilizes and adopts the nano-dispersed machine to be finely ground to behind the high speed dispersor premix to require fineness; With 0.5 kilogram of said mixture and 10 kilograms of wax mixtures, residue nonionic emulsifier, thorough mixing stirs under heating condition and is warming up to 145 ℃, make its complete fusion, form transparent melten gel, slowly add 25 kilograms of boiling water, stir and be cooled to 55 ℃, 10 kilograms of organosilicon acrylic resin emulsions that add 50% solid content, adopt high pressure homogenizer to force micro emulsion, add remaining 48.5 kg water, stir and be cooled to room temperature, adopt high pressure homogenizer to carry out second emulsifying once more, make finished product.

Specific embodiment 2: taking by weighing with the adulterated titanium-containing oxide of semiconductor material is matrix, and coated 1 kilogram of conjugated system organism on described matrix surface, molecular weight is 2 kilograms of 8000 molecules surfactants, and 4 kilograms of nonionic emulsifier utilize and adopt the nano-dispersed machine to be finely ground to behind the high speed dispersor premix to require fineness; With 30 kilograms of said mixture and wax mixtures, 4 kilograms of remaining nonionic emulsifier, 5 kilograms of modified silicon oils, thorough mixing stirs under heating condition and is warming up to 150 ℃, makes its complete fusion, form transparent melten gel, slowly add 15 kilograms of boiling water, stir and be cooled to 65 ℃, 30 kilograms of organosilicon acrylic resin emulsions that add 50% solid content, adopt high pressure homogenizer to force micro emulsion, add remaining 9 kg water, stir and be cooled to room temperature, adopt high pressure homogenizer to carry out second emulsifying once more, make finished product.

Specific embodiment 3: taking by weighing with the adulterated titanium-containing oxide of semiconductor material is matrix, and coated 2 kilograms of conjugated system organism on described matrix surface, molecular weight is 1 kilogram of 4000 a molecules surfactant, and 2 kilograms of nonionic emulsifier utilize and adopt the nano-dispersed machine to be finely ground to behind the high speed dispersor premix to require fineness; With 25 kilograms of said mixture and wax mixtures, 3 kilograms of remaining nonionic emulsifier, 5 kilograms of modified silicon oils, thorough mixing stirs under heating condition and is warming up to 148 ℃, makes its complete fusion, form transparent melten gel, slowly add 30 kilograms of boiling water, stir and be cooled to 60 ℃, 15 kilograms of organosilicon acrylic resin emulsions that add 50% solid content, adopt high pressure homogenizer to force micro emulsion, add remaining 17 kg water, stir and be cooled to room temperature, adopt high pressure homogenizer to carry out second emulsifying once more, make finished product.

Specific embodiment 4: taking by weighing with the adulterated titanium-containing oxide of semiconductor material is matrix, and coated 4 kilograms of conjugated system organism on described matrix surface, molecular weight is 1.8 kilograms of 5000 molecules surfactants, and 1 kilogram of nonionic emulsifier utilizes and adopts the nano-dispersed machine to be finely ground to behind the high speed dispersor premix to require fineness; With 15 kilograms of said mixture and wax mixtures, 1 kilogram of remaining nonionic emulsifier, thorough mixing, under heating condition, stir and be warming up to 145 ℃, make its complete fusion, form transparent melten gel, slowly add 20 kilograms of boiling water, stirring is cooled to 55 ℃, adds 25 kilograms of the organosilicon acrylic resin emulsions of 50% solid content, adopts high pressure homogenizer to force micro emulsion, add remaining 30.2 kg water, stirring is cooled to room temperature, adopts high pressure homogenizer to carry out second emulsifying once more, makes finished product.

Specific embodiment 5: taking by weighing with the adulterated titanium-containing oxide of semiconductor material is matrix, and coated 3 kilograms of conjugated system organism on described matrix surface, molecular weight is 1.5 kilograms of 6000 molecules surfactants, and 2 kilograms of nonionic emulsifier utilize and adopt the nano-dispersed machine to be finely ground to behind the high speed dispersor premix to require fineness; With 20 kilograms of said mixture and wax mixtures, 3 kilograms of remaining nonionic emulsifier, 2 kilograms of modified silicon oils, thorough mixing stirs under heating condition and is warming up to 150 ℃, makes its complete fusion, form transparent melten gel, slowly add 20 kilograms of boiling water, stir and be cooled to 60 ℃, 20 kilograms of organosilicon acrylic resin emulsions that add 50% solid content, adopt high pressure homogenizer to force micro emulsion, add residue 28.5 kg water, stir and be cooled to room temperature, adopt high pressure homogenizer to carry out second emulsifying once more, make finished product.

Claims (5)

1, a kind of fresh-keeping corrugated box is with refusing water paint, it is made of by weight following material, wax mixture 10---30 part, nonionic emulsifier---8 parts, organosilicon acrylic resin emulsion 10---30 part, modified silicon oil 0---5 part, inorganic nano photocatalyst 1---5 part, dispersion agent 0.5---2 part, surplus are water.

2, by the described a kind of fresh-keeping corrugated box of claim 1 with refusing water paint, it is made of by weight following material, wax mixture 15--25 part, nonionic emulsifier---5 parts, organosilicon acrylic resin emulsion 15---25 part, modified silicon oil 1---4 part, the inorganic nano photocatalyst---4 parts, dispersion agent 1---1.8 part, surplus are water.

3, by the described a kind of fresh-keeping corrugated box of claim 2 with refusing water paint, it is made of by weight following material, 20 parts of wax mixtures, 5 parts of nonionic emulsifier, 20 parts of organosilicon acrylic resin emulsions, 2 parts of modified silicon oils, 3 parts of inorganic nano photocatalysts, 1.5 parts of dispersion agents, surplus is a water.

4, by claim 1 or 2 or 3 described a kind of fresh-keeping corrugated boxs with refusing water paint, it is characterized in that described inorganic nano photocatalyst for being matrix with the adulterated titanium-containing oxide of semiconductor material, and coated conjugated system organism on described matrix surface; Dispersion agent is the macromolecular tensio-active agent of 2000----8000 for a part amount.

5, described any one fresh-keeping corrugated box preparation method who refuses water paint of claim 1----4 comprises following processing step:

A utilizes nano-photocatalyst, dispersion agent, part nonionic emulsifier and adopts behind the high speed dispersor premix nano-dispersed machine to be finely ground to require fineness;

B with a step mixture, wax mixture, remainder emulsifying agent, modified silicon oil thorough mixing, stirs under heating condition and is warming up to 145-150 ℃, makes its complete fusion, forms transparent melten gel;

C slowly adds boiling water, is stirred to 55-65 ℃, adds the organosilicon acrylic resin emulsion;

D adopts the high pressure homogenization machine to force micro emulsion, adds surplus water, stirs and is cooled to normal temperature; E adopts high pressure homogenization machine second emulsifying, obtains finished product.