CN103937360B - A kind of preparation method of low-temperature setting Water-based glass baking paint - Google Patents
A kind of preparation method of low-temperature setting Water-based glass baking paint Download PDFInfo
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Abstract
The preparation method that the present invention relates to a kind of low-temperature setting Water-based glass baking paint, is made up of acrylic resin, amino resins, hydroxy resin, pigment or coloring agent, wetting agent, adhesive agent, acid catalyst, coalescents, defoamer, anti-zoned levelling agent, thickening agent, antibacterial, PH regulator, cosolvent and water；The low VOC of low-temperature setting Water-based glass baking paint that the present invention makes, environmentally safe, to operator's nonhazardous, film adhesive is strong, pliability good and high rigidity, the wearability of excellence, resistance to water, alcohol resistance and salt fog resistance, and construction is simple, and storage is stable；The hardness of paint film that the present invention makes can reach more than 2H, has excellent scratch resistance anti-wear performance, and what be widely used in the goods such as bottle, scent flask, glass, light fixture, woodenware, metal, plastics is used as surface protection decoration。
Description
Technical field
The preparation method that the present invention relates to a kind of waterborne glass coatings, particularly relates to the aqueous glass baking vanish of a kind of low-temperature setting suitable in various glass baseplates。
Background technology
The coating protection of glass and glass has demand widely with decoration in industry and civil area; water soluble acrylic acid amino-stoving varnish owing to having high glaze, hardness, Bao Sebao light, the advantage such as heat-resisting become important industrial coating, be widely used in bottle, scent flask, lamp decoration, house ornamentation glass and glass apparatus etc. and be required at surface-coated protective layer and decorative coveringn。
2010, the discharge capacity of China VOC was about 18,000,000 t, and wherein nearly 1/4 from wide important topic in paint industry。Environment and human body health are caused harm to a certain extent by the discharge of a large amount of VOC of traditional solvent-borne coating。Along with mankind's understanding to its hazardness and the attention to environmental conservation; countries in the world are launched respectively regulation and are strictly limited the discharge of VOC; such as European Union's Directive.99/13/CE regulation; Germany's AT--lufl regulation (atmospheric pollution law; 1992); 66 regulations of the U.S., CAA(air cleaning method, 1970), CAAA regulation。At present, China is working out PM2.5 quality of air environment standard, and the discharge of VOC will be had strict regulation。Water paint, solventless coatings, high solid coating, UV photocureable coating and powdery paints etc. are the Main way of following coatings industry development。Water-based glass baking paint solidification temperature, up to 180～200 DEG C, does not meet the low-carbon economy developmental pattern based on low energy consumption, low stain, low emission mostly on the market at present；Additionally requiring more and more higher to the heatproof of the material such as resin, colorant pigment, selectivity is few and cost is high, it is impossible to meet the technological requirement of the clients such as modern glass such as bottle, scent flask, Glass Craft。
Summary of the invention
The present invention selects self-cross linking type, core-shell copolymerized thermosetting water soluble hydroxy acrylate, owing to resin hydroxyl is more, be conducive to improving the degree of cross linking of coating, make film forming solidification temperature low, and there is after film forming extremely strong adhesive force and impact resistance, there is good dicoration, corrosion resistance, resistance to water and alcohol resistance。
Amino resins is chosen with polymerization high methylol group type part methyl-etherified melmac, containing alkoxy methyl and methylol, also has minimal amount of imino group。Owing to alkoxy methyl is mainly the group of cross-linking reaction, need higher temperature that cross-linking reaction could occur, and the reactivity of methylol is more than alkoxy methyl, the increase of methylol group content in amino resins, curing reaction speed can be improved and reduce baking temperature, it contains minimal amount of imino group simultaneously, it is possible to reduce self-polymeric reaction；The film that low methyl-etherified amino resins is formed after solidifying has the alcohol resistance of excellence, hardness and gloss。
Hydroxy resin can improve the gloss of paint film, hardness, resistance to alcohol repellency and resistance to water。Pigment is had good peptizaiton by the hydroxy resin containing more hydrophilic group, and emulsion has good Stabilization, can fill the space between emulsion particle, thus improve the compactness of film, planarization and resistance to water during film forming。Hydroxy resin contains more crosslinked group-COOH and-OH, and crosslinked group content is more high, and the crosslink density of film is more big, thus the vitrification point of film is more high, and hardness is also more big；Hydroxy resin molecular weight is little, the good dispersion in water, and the compatibility of firming agent amino resins is good, is conducive to crosslinking。
Being added with of acid catalyst is beneficial to the crosslinking film forming speed and crosslink density increasing resin, reducing solidification temperature, improving state of cure, thus improving resistance to water and the hardness of paint film。
In order to solve techniques as described above problem, the present invention takes techniques below scheme: the present invention relates to a kind of low-temperature setting Water-based glass baking paint, its basic recipe is: acrylic resin 40%～60%, amino resins 7～15%, hydroxy resin 7～20%, pigment or coloring agent 0%～30%, wetting agent 0.1%～0.6%, adhesive agent 0.2%～1.5%, acid catalyst 0.2%～1%, coalescents 2%～12%, defoamer 0.1%～0.5%, anti-zoned levelling agent 0.1%～0.5%, thickening agent 0.2%～1.0%, antibacterial 0.1%～0.3%, PH regulator 0.3%～5%, cosolvent 2%～10%, deionized water 2%～25%。
Wherein, the self-cross linking type that water-soluble resin selection vitrification point is relatively low, core-shell copolymerized thermosetting water soluble hydroxy acrylate。
Amino resins selects polymerization high methylol group type part methyl-etherified melmac。
Hydroxy resin selects organosilicon acrylic resin, water-based epoxy acrylic resin, the one of pure third resin or its combination。
Pigment or coloring agent select that the compatibility is good, high temperature resistant, resistance to ag(e)ing, environmental protection, the titanium dioxide of fineness≤15 μ, carbon black, organic pigment, dyestuff, transparent pigment, pearlescent pigment, one in polygonal effect pigment and metallic pigments aqueous color paste or its combination。
Aminopropyl trimethoxysilane coupling agent selected by adhesive agent。
Coalescents selects ethanol, isopropanol, propylene glycol, sec-butyl alcohol, n-butyl alcohol, propylene glycol monomethyl ether, propandiol butyl ether, alcohol ester-12, propylene glycol phenylate, the one of butyl or its combination。
The one of p-methyl benzenesulfonic acid, DBSA, dinonylnaphthalene sulfonic acid, dinonylnaphthalene disulfonic acid selected by acid catalyst。
The one using ammonia, triethylamine, triethanolamine, N, N-dimethylethanolamine, AMP chosen by PH regulator。
The preparation method that the present invention proposes a kind of low-temperature setting Water-based glass baking paint, its preparation technology is as follows: by formulation weight percentages, deionized water, wetting agent, defoamer mixing and stirring, add acrylic resin, amino resins, hydroxy resin, add coalescents, acid catalyst, levelling agent, thickening agent, anti-settling agent, PH regulator stir, add pigment or coloring agent as required, moisturizing, froth breaking, it is transferred to the viscosity of regulation, prepares a kind of low-temperature setting Water-based glass baking paint。
The present invention also provides for the coating process of a kind of low-temperature setting Water-based glass baking paint, comprises the following steps: must be cleaned ground before application processing, fill and lead up gap and aperture with putty, polish flat after drying；By Water-based glass baking paint brushing, roller coating or spray on the ground handled well, control build between 8～12 μm；Place 5～15min or surface drying in room temperature after；Brushing or spraying second water-based stoving paint, control build between 8～12 μm；As required or the surface appearance of coating film decide whether spray the 3rd road, control build 10～50 μm；It is placed in the baking oven of 110～130 DEG C after surface drying and toasts 15～25min。
The low VOC of low-temperature setting Water-based glass baking paint that the present invention prepares, environmentally safe, to operator's nonhazardous, film adhesive is strong, pliability good and high rigidity, the wearability of excellence, resistance to water, alcohol resistance and salt fog resistance, and construction is simple, and storage is stable。The hardness of paint film that the present invention makes, up to more than 2H, has excellent scratch resistance anti-wear performance, and what be widely used in the goods such as bottle, scent flask, glass, light fixture, woodenware, metal, plastics is used as surface protection decoration。
Detailed description of the invention
Low-temperature setting Water-based glass baking paint prepares material according to the component formula of table 1 and implements。
1 four low-temperature setting Water-based glass baking paint embodiment component formula of table
Embodiment 1:
According to example 1 low-temperature setting aqueous white glass baking varnish in table 1 by formulation weight ratio, deionized water, wetting agent, defoamer mixing and stirring, add acrylic resin, amino resins, hydroxy resin, add coalescents, acid catalyst, titanium dioxide slurry, levelling agent, thickening agent, anti-settling agent, PH regulator stir, moisturizing, froth breaking, it is transferred to the viscosity of regulation, filters and packages the aqueous white glass baking varnish of prepared a kind of low-temperature setting。
Embodiment 2:
Embodiment 2 low-temperature setting aqueous red glass baking vanish preparation process is with reference to embodiment 1。
Embodiment 3:
Embodiment 3 low-temperature setting aqueous silver color glass baking varnish preparation process is with reference to embodiment 1。
Embodiment 4:
Embodiment 4 low-temperature setting aqueous transparent glass baking varnish preparation process is with reference to embodiment 1。
According to relevant national standard, the film performance of the low-temperature setting Water-based glass baking paint of the present invention being detected, testing result is as shown in table 2。
Table 2 low-temperature setting Water-based glass baking paint film performance testing result
| Detection project | Testing result | Examination criteria |
| Paint film appearance | Smooth, smooth, plentiful | Range estimation |
| Pencil hardness | ≥2H | GB/T6739-2006 |
| Adhesive force, draws circle method | 1 grade | GB/T9286-1998 |
| Pliability | ≤1mm | GB/T1731-1993 |
| Resistance to impact | 50kg·cm | GB/T1732-1993 |
| 60 ° of gloss | > 93 | GB/T9754-1988 |
| Resistance to water | 120h is without exception | GB/T1733—1993 |
| Alkali resistance, 0.1%NaOH | 120h is without exception | GB9274 |
| Resistance to salt water, 3%NaCl | 120h is without exception | GB/T10834-1989 |
| Salt fog resistance | 96h is without exception | GB/T1771-1991 |
| Resistance to alcohol repellency, 50%C2H5OH | 120h is without exception | GB/T1763—1979 |
| Wearability (back and forth) | > 120 times | GB/T1768—1979 |
Although the present invention has been explained in detail and has quoted as proof embodiment, but for those of ordinary skill in the art, it is clear that can various schemes, amendment and change that make as specified above, should be construed as being included within scope of the claims。
Claims (5)
1. a low-temperature setting Water-based glass baking paint, it is characterized in that: by weight percentage, including following component: water soluble acrylic resin 40%～60%, amino resins 7～15%, hydroxy resin 7～20%, pigment or coloring agent 0%～30%, wetting agent 0.1%～0.6%, adhesive agent 0.2%～1.5%, acid catalyst 0.2%～1%, coalescents 2%～12%, defoamer 0.1%～0.5%, anti-zoned levelling agent 0.1%～0.5%, thickening agent 0.2%～1.0%, antibacterial 0.1%～0.3%, pH adjusting agent 0.3%～5%, cosolvent 2%～10%, deionized water 2%～25%；
Wherein, described water soluble acrylic resin is the relatively low self-cross linking type of vitrification point, core-shell copolymerized thermosetting water soluble hydroxy acrylate；Described amino resins is polymerization high methylol group type part methyl-etherified melmac；Described hydroxy resin is the combination of one or more of organosilicon acrylic resin, water-based epoxy acrylic resin, pure third resin；Described adhesive agent are aminopropyl trimethoxysilane coupling agent；Described acid catalyst is the one of p-methyl benzenesulfonic acid, DBSA, dinonylnaphthalene sulfonic acid, dinonylnaphthalene disulfonic acid。
2. low-temperature setting Water-based glass baking paint as claimed in claim 1 a kind of, it is characterised in that: described pigment or coloring agent are that the compatibility is good, high temperature resistant, resistance to ag(e)ing, environmental protection, the titanium dioxide of fineness≤15 μm, carbon black, organic pigment, dyestuff, transparent pigment, pearlescent pigment, the combination of one or more in polygonal effect pigment and metallic pigments aqueous color paste。
3. a kind of low-temperature setting Water-based glass baking paint as claimed in claim 1, it is characterised in that: described pH adjusting agent is the one of ammonia, triethylamine, triethanolamine, N, N-dimethylethanolamine, 2-amino-2-methyl-1-propanol。
4. a kind of low-temperature setting Water-based glass baking paint as claimed in claim 1, it is characterised in that: described coalescents is the combination of one or more of ethanol, isopropanol, propylene glycol, sec-butyl alcohol, n-butyl alcohol, carbitol, propylene glycol monomethyl ether, propandiol butyl ether, alcohol ester-12, propylene glycol phenylate, butyl。
5. the coating process of an a kind of low-temperature setting Water-based glass baking paint as claimed in claim 1, it is characterized in that: described coating process, comprise the following steps: must be cleaned ground before application processing, fill and lead up gap and aperture with putty, polish flat after drying；By Water-based glass baking paint brushing, roller coating or spray on the ground handled well, control build between 8～12 μm；Place 5～15min or surface drying in room temperature after；Brushing or spraying second Water-based glass baking paint, control build between 8～12 μm；As required or the surface appearance of coating film decide whether spray the 3rd road, control build 10～50 μm；It is placed in the baking oven of 110～130 DEG C after surface drying and toasts 15～25min。
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