CN102888158B - Preparation method of high-resistance polymer coating liquid - Google Patents
Preparation method of high-resistance polymer coating liquid Download PDFInfo
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Abstract
A preparation method of high-resistance polymer coating liquid comprises the following steps of: firstly, adding the water-soluble high polymer with high hydroxyl density into part of water with a temperature of 92-99 DEG C, stirring to obtain a solution of the water-soluble high polymer with high hydroxyl density and reducing the temperature to be 30-40 DEG C for later use; secondly, adding nano metal oxide, a viscosity modifier, a polymer dispersant and a coupling agent into part of water and stirring to obtain a homogeneous and transparent dispersion liquid; and thirdly, mixing the solution of the water-soluble high polymer with high hydroxyl density prepared in the first step with the homogeneous and transparent dispersion liquid prepared in the second step, then sequentially adding the balance of water, a drying regulator and a cross-linking agent, stirring at the speed of 50-500 rpm for 30-60 minutes and filtering by using a stainless steel filter with 200-800 meshes to obtain the high-resistance coating liquid. The multi-component environment-friendly coating liquid prepared in the invention has excellent oxygen-resistance performance under the condition that a relatively thin coating is formed and simultaneously has the advantages of simple preparation process and stable performance.
Description
Technical field
The present invention relates to the preparation method of the high-barrier polymkeric substance of high oxygen barrier after a kind of film forming.
Background technology
In food storing transportation, cause the factor of food spoilage a lot, wherein mainly food contacts with the oxygen in air the food spoilage caused.And for liquid-food, in order to improve storage time and the shelf-lives of food, usually adopting has the material of high obstructing performance to pack to oxygen, this packaging will have enough water resistances to run off to prevent content from occurring to leak simultaneously.
For water tolerance, if select non-polar polymeric material as polyolefine, comprise polyethylene, polypropylene etc., the progressive die of adequate thickness can provide good block-water performance; And for the very little oxygen of molecular diameter, stronger polarity must be adopted, high crystallization, high fine and close material could obtain low OTR oxygen transmission rate.
The polymer substance of good barrier is had mainly to comprise polymeric amide (PA), polyester (PET), polyvinylidene dichloride (PVDC), polyvinyl alcohol (PVA), ethylene-vinyl alcohol (EVOH), starch (Starch) and Mierocrystalline cellulose etc. to oxygen.Wherein PVA, EVOH, PVDC are high barrier material, and these three kinds of materials respectively have obvious shortcoming: EVOH has enough barriers and processibility, but cost is very high; PVDC molecule is strong polarity, although oxygen barrier is every wet, because decomposition temperature and fusing point are very close, processing difficulties, is not shaped by extrusion method.And packaging function uses up rear very difficult recycling, PVDC burning can produce a large amount of toxic gaseous hydrochlorides (HCl), and its environmental-protecting performance is very poor, and in today that environmental problem is becoming increasingly acute, be eliminated just matter of time; The hydroxy density of PVA is high, polar molecule interchain bond is tight, degree of crystallinity is very high, to nonpolar oxygen molecule, there is excellent barrier property, but high-crystallinity causes processing difficulties, processing temperature is even higher than its fusing point, although can improve its processing characteristics by interpolation starch, glyceride type softening agent, effect is unsatisfactory.And have enterprise to use casting method film forming, but it is thicker to have film, and product stock comparatively strictly to environment (is crossed dry film to become fragile, is crossed wet then adhesion), complex procedures, the shortcoming high to equipment requirements.
Summary of the invention
For this reason, technical problem to be solved by this invention is that the existing macromolecular material difficulty being used as high-resistance polymer coating fluid is processed, not easily reclaimed, the invention provides the preparation method of a kind of multicomponent environment-friendly high every polymer coating fluid for this reason, namely the coating fluid utilizing the method to prepare has the oxygen barrier property of excellence in compared with shallow layer situation being formed, this coating fluid has preparation technology simply simultaneously, the advantage of stable performance.
For achieving the above object, the technical solution adopted in the present invention is:
(1) water-soluble high hydroxy density high molecular polymer is added in the part water of 92-100 DEG C, stir, obtain the solution (being called solution A) of water-soluble high hydroxy density high molecular polymer, and be cooled to 30-40 DEG C for subsequent use;
(2) nano-metal-oxide, viscosity modifier, macromolecule dispersing agent, coupling agent are added in part water, stir and obtain transparent and homogeneous dispersion liquid (being called B dispersion liquid);
(3) after B dispersion liquid mixing prepared by solution A step (1) prepared and step (2), add the water of surplus, drying regulator and linking agent more successively, 50-500rpm stirs 30-60min, 200-400 order Stainless Steel Filter and filters and obtain high barrier coating fluid.
Preferably, the preparation method of described high-resistance polymer coating fluid is:
(1) water-soluble high hydroxy density high molecular polymer is added in the part water of 92-100 DEG C, stir, obtain the solution (being called solution A) of water-soluble high hydroxy density high molecular polymer, and be cooled to 30-40 DEG C for subsequent use;
(2) nano-metal-oxide, part viscosity modifier, macromolecule dispersing agent, coupling agent are added in part water, use 100-400 order metre filter after stirring 30-60min under stirring velocity 4000-8000rpm condition, obtain transparent and homogeneous dispersion liquid (being called B dispersion liquid);
(3) after B dispersion liquid mixing prepared by solution A step (1) prepared and step (2), add the water of surplus, the viscosity modifier of surplus, drying regulator and linking agent more successively, 50-500rpm stirs 30-60min, 200-400 order Stainless Steel Filter and filters and obtain high barrier coating fluid.
Further preferably, the preparation method of described high-resistance polymer coating fluid is:
(1) water-soluble high hydroxy density high molecular polymer is added in the part water of 92-100 DEG C, stir, obtain the solution (being called solution A) of water-soluble high hydroxy density high molecular polymer, and be cooled to 30-40 DEG C for subsequent use;
(2) nano-metal-oxide, part viscosity modifier, macromolecule dispersing agent, coupling agent, part siccative are added in part water, use 100-400 order metre filter after stirring 30-60min under stirring velocity 4000-8000rpm condition, obtain transparent and homogeneous dispersion liquid (being called B dispersion liquid);
(3) after B dispersion liquid mixing prepared by solution A step (1) prepared and step (2), add the water of surplus, the viscosity modifier of surplus, surplus drying regulator and linking agent more successively, 50-500rpm stirs 30-60min, 200-400 order Stainless Steel Filter and filters and obtain high barrier coating fluid.
The high-resistance polymer coating fluid of preparation contains following component:
A kind of high-resistance polymer coating fluid, comprises following component:
Water-soluble high hydroxy density high molecular polymer 6-18wt%;
Nano-metal-oxide 0-7wt%;
Silane coupling agent 0-1.3wt%;
Viscosity modifier 0.01-2.5wt%;
Macromolecule dispersing agent 0.1-6wt%;
Linking agent 0.45-1.2wt%;
Drying regulator 1-28wt%;
With water 40-92.44wt%.
Preferably, described high-resistance polymer coating fluid comprises following component:
Water-soluble high hydroxy density high molecular polymer 8-14wt%;
Nano-metal-oxide 2-5wt%;
Silane coupling agent 0.5-0.9wt%;
Viscosity modifier 0.8-1.6wt%;
Macromolecule dispersing agent 3-4.5wt%;
Linking agent 0.7-0.9wt%;
Drying regulator 8-17wt%;
With water 18-80wt%.
Described water-soluble high hydroxy density polymkeric substance is a kind of or wherein several mixture in polyvinyl alcohol (PVOH), starch and treated starch, cellulose and its derivates.Be preferably polyvinyl alcohol, the molecular weight of described polyvinyl alcohol is 12000-75000, and alcoholysis degree is 85-99.5%wt.
Described nano-metal-oxide is nano silicon, nano aluminium oxide one or its mixture, and preferred surface is amassed as 175-230m
2the nano silicon of/g.
Described silane coupling agent contains amino or allyl group.
Described viscosity modifier is low molecular weight carboxylic acid, is preferably a kind of or wherein several mixture in formic acid, acetic acid, propionic acid.
Described macromolecule dispersing agent is anionic polyelectrolyte macromolecule dispersing agent, and be preferably polyacrylic acid or polymethyl acrylic acid, and molecular weight ranges is 5,000-1,220,000, the molecular weight of described polymethyl acrylic acid is preferably 5,000-200,000.
Described linking agent is boric acid and boratory mixture, and preferably, described linking agent is the mixture of boric acid and sodium tetraborate, and the part by weight between described sodium tetraborate and boric acid is 1: 1-1: 3.
Described drying regulator is a kind of or wherein several mixture in methyl alcohol, ethanol, Virahol, sec-butyl alcohol, isopropylcarbinol.
Compared to existing technology, beneficial effect of the present invention is:
High-resistance polymer coating fluid prepared by the present invention comprises water-soluble high hydroxy density high molecular polymer, nano-metal-oxide, silane coupling agent, viscosity modifier, macromolecule dispersing agent, linking agent, drying regulator and water, and the selectable material of each composition and shared ratio have passed through that performing creative labour obtains.In addition, the material selected by each component in high-resistance polymer coating fluid of the present invention is ep-type material, and is preferably the mode adopting substep to add constituent part.Experiment proves that the high-resistance polymer coating fluid adopting method of the present invention to prepare is coated on biaxial stretching polyester (BOPET) surface, and coated weight is only 1.2g/m
2, the percent of pass of oxygen is only up to 2.20cc/day.m
2, so when adopting high-resistance polymer coating fluid of the present invention to apply, the coating formed under less painting amount has excellent oxygen-barrier property, is therefore applicable to the preparation of high oxygen barrier material.
In addition, high molecular polymer is dissolved in water by the preparation method of described high-resistance polymer coating fluid, and compared with the processing mode needed for other macromolecular materials such as existing extrusion moulding, its preparation method is simple, simple to equipment requirements, reduce tooling cost.
Embodiment
Embodiment 1
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 18wt%, its molecular weight is 13200, alcoholysis degree is 88wt%;
Nano silicon 1wt%, specific surface area is 200m
2/ g;
Silane coupling reagent KH-570 0.1%wt;
Acetic acid 0.32wt%;
Polyacrylic acid 0.32wt%, its molecular weight 5000;
Linking agent 1.2wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 1;
Ethanol 5wt%;
Water 74.06wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is:
(1) be 13200 by 25 parts of molecular weight, alcoholysis degree is that the PVOH of 88%wt adds in the water of 75 parts 92 DEG C, and 500rpm stirs insulated and stirred 40min, obtains solution A, be cooled to 30 DEG C for subsequent use.
(2) be 200m by 25 parts of specific surface areas
2/ g silicon-dioxide, 2.5 parts of KH-570,3.5 parts of acetic acid, 8 part of 5000 molecular weight polyacrylic acid add in 61 parts of water, with 200 order metre filter after stirring velocity 6000rpm stirring 40min, obtain homogeneous translucent silica dispersions, are called B dispersion liquid;
(3) 72 parts of solution A, 4 parts of B dispersion liquid mix and blends are got, add the water of 17.62 parts, 0.18 part of viscosity modifier acetic acid, 5 parts of ethanol and 1.2 parts of linking agent (boric acid: Sodium Tetraborate weight ratio=1: 1) successively, 100rpm stirs 35min, and 400 order Stainless Steel Filters filter and obtain high barrier coating fluid.
By above-mentioned coating fluid according to 1.2g/m
2dry pickup be coated on surface tension 52 dyne 12umBOPET surface, adopts 70 DEG C of warm air dryings, measure coating fluid formation coating OTR oxygen transmission rate, test result is in table 1.
Embodiment 2
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 10.5wt%, its molecular weight 75000, alcoholysis degree 99%wt;
Nano silicon 3.6wt%, specific surface area is 200m2/g;
Silane coupling reagent KH-570 0.05%wt;
Acetic acid 1.325wt%;
Polymethyl acrylic acid 1.2wt%, its molecular weight 5000;
Linking agent 0.45wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 1;
Virahol 8wt%;
Water 74.875wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is:
(1) be 75000 by 20 parts of molecular weight, alcoholysis degree is that the PVOH of 99%wt adds in the water of 80 parts 92 DEG C, and 800rpm stirs insulated and stirred 40min, obtains solution A, be cooled to 30 DEG C for subsequent use;
(2) be 200m by 24 parts of specific surface areas
2/ g silicon-dioxide, 0.2 part of KH-570,0.5 part of acetic acid, 8 part of 5000 molecular weight polyisoprene methacrylic acid add in 67.3 parts of water, with 200 order metre filter after stirring velocity 7000rpm stirring 60min, obtain homogeneous translucent silica dispersions, be called B dispersion liquid;
(3) 52.5 parts of solution A, 15 parts of B dispersion liquid mix and blends are got, add the water of 22.8 parts, 1.25 parts of viscosity modifier acetic acid, 8 parts of Virahols and 0.45 part of linking agent (boric acid: Sodium Tetraborate weight ratio=1: 1) successively, 150rpm stirs 40min, and 400 order Stainless Steel Filters filter and obtain high barrier coating fluid.
By above-mentioned coating fluid according to 1.2g/m
2dry pickup be coated on surface tension 52 dyne 12umBOPET surface, adopts 70 DEG C of warm air dryings, measure coating fluid formation coating OTR oxygen transmission rate, test result is in table 1.
Embodiment 3
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 10wt%, its molecular weight 75000, alcoholysis degree 99%wt;
Nano aluminium oxide 7wt%, specific surface area is 200m
2/ g;
Acetic acid 1.18wt%;
Polymethyl acrylic acid 0.168wt%, its molecular weight 5000;
Linking agent 0.5wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 3;
Virahol 11.72wt%;
Water 69.432wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is:
(1) be 75000 by 20 parts of molecular weight, alcoholysis degree is that the PVOH of 99%wt adds in the water of 80 parts 95 DEG C, and 800rpm stirs insulated and stirred 40min, obtains solution A, be cooled to 30 DEG C for subsequent use;
(2) be 200m by 25 parts of specific surface areas
2/ g aluminum oxide, 3.5 parts of acetic acid, 0.6 part of 10000 molecular weight polyisoprene methacrylic acid add in 46.9 parts of water, with 200 order metre filter after 24 parts of Virahol stirring velocity 5000rpm stirring 40min, obtain homogeneous translucent silica dispersions, be called B dispersion liquid;
(3) 50 parts of solution A, 28 parts of B dispersion liquid mix and blends are got, add the water of 16.3 parts, 0.2 part of viscosity modifier acetic acid, 5 parts of Virahols and 0.5 part of linking agent (boric acid: Sodium Tetraborate weight ratio=1: 3) successively, 150rpm stirs 40min, and 400 order Stainless Steel Filters filter and obtain high barrier coating fluid.
By above-mentioned coating fluid according to 1.2g/m
2dry pickup be coated on surface tension 52 dyne 12umBOPET surface, adopts 70 DEG C of warm air dryings, measure coating fluid formation coating OTR oxygen transmission rate, test result is in table 1.
Embodiment 4
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 6wt%, its molecular weight 44000, alcoholysis degree 88%wt;
Nano silicon 2wt%, specific surface area is 200m
2/ g;
Acetic acid 1.1wt%;
Polyacrylic acid 1.2wt%, its molecular weight 5000;
Linking agent 0.8wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 1;
Virahol 6wt%;
Water 80.9wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is:
(1) be 44000 by 20 parts of molecular weight, alcoholysis degree is that the PVOH of 88%wt adds in the water of 80 parts 95 DEG C, and 700rpm stirs insulated and stirred 40min, obtains solution A, be cooled to 30 DEG C for subsequent use;
(2) be 200m by 20 parts of specific surface areas
2/ g silicon-dioxide, 0.5 part of acetic acid, 0.6 part of 5000 molecular weight polyacrylic acid add in 68.5 parts of water, with 200 order metre filter after 5 parts of Virahol stirring velocity 6500rpm stirring 40min, obtain homogeneous translucent silica dispersions, are called B dispersion liquid;
(3) 30 parts of solution A, 20 parts of B dispersion liquid mix and blends are got, add the water of 43.2 parts, 1 part of viscosity modifier acetic acid, 5 parts of Virahols and 0.8 part of linking agent (boric acid: Sodium Tetraborate weight ratio=1: 1) successively, 150r pm stirs 40min, and 400 order Stainless Steel Filters filter and obtain high barrier coating fluid.
By above-mentioned coating fluid according to 1.2g/m
2dry pickup be coated on surface tension 52 dyne 12umBOPET surface, adopts 70 DEG C of warm air dryings, measure coating fluid formation coating OTR oxygen transmission rate, test result is in table 1.
Table 1 oxygen permeability test data table (oxygen transmission rate adopts GB/T19789-2005 standard to test)
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Coating quantitatively (g/m2) | 1.2 | 1.2 | 1.2 | 1.2 |
| Oxygen permeating amount (cc/ (day.m2)) | 2.20 | 0.65 | 1.24 | 1.84 |
Can be found out by above data, under less painting amount, the coating that this coating solution drying is formed afterwards has superior oxygen-barrier property, and this coating fluid can be used for the preparation of high oxygen barrier material.And this coating fluid preparation technology is simple, environmental protection, barrier layer cost is low.
Embodiment 5
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 12wt%, its molecular weight 12000, alcoholysis degree 99.5%wt;
Nano silicon 4wt%, specific surface area is 175m
2/ g;
Silane coupling reagent KH-570 1.3%wt;
Formic acid 0.01wt%;
Polyacrylic acid 6wt%, its molecular weight 20000;
Linking agent 0.6wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 3;
Sec-butyl alcohol 28wt%;
Water 49.09wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is same embodiment 4, and wherein step (1) is added by PVOH in the water of 100 DEG C, and 1000rpm stirs insulated and stirred 30min, obtains solution A, be cooled to 40 DEG C for subsequent use;
Step (2) is added to the water silicon-dioxide, silane coupling agent, formic acid, polyacrylic acid, with 100 order metre filter after stirring velocity 4000rpm stirring 60min, obtains homogeneous translucent silica dispersions, be called B dispersion liquid;
Step (3) gets solution A, B dispersion liquid mix and blend, and stir speed (S.S.) 500rpm stirs 30min, and 200 order Stainless Steel Filters filter and obtain high barrier coating fluid.
By above-mentioned coating fluid according to 1.2g/m
2dry pickup be coated on surface tension 52 dyne 12umBOPET surface, adopts 70 DEG C of warm air dryings, measure coating fluid formation coating OTR oxygen transmission rate.
Embodiment 6
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 15wt%, its molecular weight 30000, alcoholysis degree 85%wt;
Nano silicon 5wt%, specific surface area is 230m
2/ g;
Silane coupling reagent KH-570 1%wt;
Propionic acid 2.5wt%;
Polyacrylic acid 0.1wt%, its molecular weight 1220000;
Linking agent 1.0wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 3;
Isopropylcarbinol 1.0wt%;
Water 74.4wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is same embodiment 3, and wherein step (1) is added by PVOH in the water of 96 DEG C, and 300rpm stirs insulated and stirred 60min, obtains solution A, be cooled to 35 DEG C for subsequent use;
Step (2) is added to the water silicon-dioxide, propionic acid, polyacrylic acid, with 400 order metre filter after stirring velocity 8000rpm stirring 30min, obtains homogeneous translucent silica dispersions, be called B dispersion liquid;
Step (3) gets solution A, B dispersion liquid mix and blend, and stir speed (S.S.) 50rpm stirs 60min, and 300 order Stainless Steel Filters filter and obtain high barrier coating fluid.
Embodiment 7
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 18wt%, its molecular weight 30000, alcoholysis degree 85%wt;
Nano silicon 7wt%, specific surface area is 230m2/g;
Silane coupling reagent KH-570 1.3%wt;
Propionic acid 2.5wt%;
Polyacrylic acid 4wt%, its molecular weight 1220000;
Linking agent 1.2wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 2;
Isopropylcarbinol 26wt%;
Water 40wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is with embodiment 1.
Embodiment 8
High-resistance polymer coating fluid comprises following component:
Polyvinyl alcohol PVOH 6wt%, its molecular weight 30000, alcoholysis degree 85%wt;
Propionic acid 0.06wt%;
Linking agent 0.5wt%, described linking agent is the mixture of boric acid and Sodium Tetraborate, and its weight part ratio is 1: 2;
Isopropylcarbinol 1wt%;
Water 92.44wt%.
The preparation method of above-mentioned high-resistance polymer coating fluid is with embodiment 2.
A kind of or wherein several mixture in polyvinyl alcohol PVOH available starches in embodiment and treated starch, cellulose and its derivates replaces, and utilizes the method for such Polymer materialspreparation high-resistance polymer coating fluid respectively with the method in embodiment 1-8.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that the common engineering technical personnel in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (13)
1. a preparation method for high-resistance polymer coating fluid, is characterized in that, comprises the steps:
(1) water-soluble high hydroxy density high molecular polymer is added in the part water of 92-100 DEG C, stir, obtain the solution of water-soluble high hydroxy density high molecular polymer, and be cooled to 30-40 DEG C for subsequent use, wherein said water-soluble high hydroxy density polymkeric substance is a kind of or wherein several mixture in polyvinyl alcohol, starch and treated starch, cellulose and its derivates; Wherein the molecular weight of polyvinyl alcohol is 12000-75000, and alcoholysis degree is 85-99.5 wt%;
(2) nano-metal-oxide, viscosity modifier, macromolecule dispersing agent, coupling agent are added in part water, stir and obtain transparent and homogeneous dispersion liquid, wherein, described macromolecule dispersing agent is polyacrylic acid or polymethyl acrylic acid, and molecular weight ranges is 5,000-1,220,000;
(3) after transparent and homogeneous dispersion liquid mixing prepared by the solution of water-soluble high hydroxy density high molecular polymer step (1) prepared and step (2), add the water of surplus, drying regulator and linking agent more successively, 50-500rpm stirs 30-60min, 200-400 order Stainless Steel Filter filters and obtains high barrier coating fluid, wherein, described linking agent is the mixture of borate and boric acid; The high barrier coating fluid of preparation comprises following component:
2. a preparation method for high-resistance polymer coating fluid, is characterized in that, comprises the steps:
(1) water-soluble high hydroxy density high molecular polymer is added in the part water of 92-100 DEG C, stir, obtain the solution of water-soluble high hydroxy density high molecular polymer, and be cooled to 30-40 DEG C for subsequent use, wherein said water-soluble high hydroxy density polymkeric substance is a kind of or wherein several mixture in polyvinyl alcohol, starch and treated starch, cellulose and its derivates; Wherein the molecular weight of polyvinyl alcohol is 12000-75000, and alcoholysis degree is 85-99.5 wt%;
(2) nano-metal-oxide, part viscosity modifier, polyacrylic acid or polymethyl acrylic acid, coupling agent are added in part water, 100-400 order metre filter is used after stirring 30-60min under stirring velocity 4000-8000rpm condition, obtain transparent and homogeneous dispersion liquid, wherein, the molecular weight ranges of described polyacrylic acid or polymethyl acrylic acid is 5,000-1,220,000;
(3) after transparent and homogeneous dispersion liquid mixing prepared by the solution of water-soluble high hydroxy density high molecular polymer step (1) prepared and step (2), add the water of surplus, the viscosity modifier of surplus, drying regulator and linking agent more successively, 50-500rpm stirs 30-60min, 200-400 order Stainless Steel Filter filters and obtains high barrier coating fluid, wherein, described linking agent is the mixture of borate and boric acid; The high barrier coating fluid of preparation comprises following component:
3. a preparation method for high-resistance polymer coating fluid, is characterized in that, comprises the steps:
(1) water-soluble high hydroxy density high molecular polymer is added in the part water of 92-100 DEG C, stir, obtain the solution of water-soluble high hydroxy density high molecular polymer, and be cooled to 30-40 DEG C for subsequent use, wherein said water-soluble high hydroxy density polymkeric substance is a kind of or wherein several mixture in polyvinyl alcohol, starch and treated starch, cellulose and its derivates; Wherein the molecular weight of polyvinyl alcohol is 12000-75000, and alcoholysis degree is 85-99.5 wt%;
(2) nano-metal-oxide, part viscosity modifier, polyacrylic acid or polymethyl acrylic acid, coupling agent, part siccative are added in part water, 100-400 order metre filter is used after stirring 30-60min under stirring velocity 4000-8000rpm condition, obtain transparent and homogeneous dispersion liquid, wherein, the molecular weight ranges of described polyacrylic acid or polymethyl acrylic acid is 5,000-1,220,000;
(3) after transparent and homogeneous dispersion liquid mixing prepared by the solution of water-soluble high hydroxy density high molecular polymer step (1) prepared and step (2), add the water of surplus, the viscosity modifier of surplus, surplus drying regulator and linking agent more successively, 50-500rpm stirs 30-60min, 200-400 order Stainless Steel Filter filters and obtains high barrier coating fluid, wherein, described linking agent is the mixture of borate and boric acid; The high barrier coating fluid of preparation comprises following component:
4. the preparation method of the high-resistance polymer coating fluid according to any one of claim 1-3, is characterized in that, the stirring velocity of described step (1) is 300-1000rpm, and churning time is 40-60min.
5. the preparation method of the high-resistance polymer coating fluid according to claim l, is characterized in that, the stirring velocity of described step (2) is 4000-8000rpm, and churning time is 30-60min.
6. the preparation method of high-resistance polymer coating fluid according to claim 5, is characterized in that, the solution after stirring in described step (2) obtains transparent and homogeneous dispersion liquid through 100-400 order metre filter.
7. the preparation method of the high-resistance polymer coating fluid according to any one of claim 1-3, it is characterized in that, described nano-metal-oxide is nano silicon, nano aluminium oxide one or its mixture, and the specific surface area of described nano silicon is 175-230m
2/ g.
8. the preparation method of the high-resistance polymer coating fluid according to any one of claim 1-3, is characterized in that, described silane coupling agent contains amino or allyl group.
9. the preparation method of the high-resistance polymer coating fluid according to any one of claim 1-3, is characterized in that, described viscosity modifier is a kind of or wherein several mixture in formic acid, acetic acid, propionic acid.
10. the preparation method of the high-resistance polymer coating fluid according to any one of claim 1-3, is characterized in that, described polymethyl acrylic acid molecular weight ranges is 5,000-200,000.
The preparation method of 11. high-resistance polymer coating fluids according to any one of claim 1-3, it is characterized in that, described linking agent is the mixture of sodium tetraborate and boric acid.
The preparation method of 12. high-resistance polymer coating fluids according to claim 11, is characterized in that, the part by weight between described boric acid and sodium tetraborate is 1:1-3:1.
The preparation method of 13. high-resistance polymer coating fluids according to any one of claim 1-3, it is characterized in that, described drying regulator is a kind of or wherein several mixture in methyl alcohol, ethanol, Virahol, sec-butyl alcohol, isopropylcarbinol.
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| CN103508074B (en) * | 2012-06-26 | 2016-03-16 | 层层包装事业股份有限公司 | Packaging for foodstuff material |
| CN103113788A (en) * | 2012-12-10 | 2013-05-22 | 江苏千色花化工有限公司 | Heat-resistant paint |
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| CN102888158A (en) | 2013-01-23 |
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