CN102786830B - Hydroxyalkyl amide curing agent composition and application thereof in powdery paints - Google Patents
Hydroxyalkyl amide curing agent composition and application thereof in powdery paints Download PDFInfo
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- CN102786830B CN102786830B CN201210244512.3A CN201210244512A CN102786830B CN 102786830 B CN102786830 B CN 102786830B CN 201210244512 A CN201210244512 A CN 201210244512A CN 102786830 B CN102786830 B CN 102786830B
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- hydroxyalkyl amide
- curing agent
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Abstract
The invention discloses a hydroxyalkyl amide curing agent composition, comprising 70-95wt% of hydroxyalkyl amide curing agent, 2-15wt% of anti-yellowing agent, and 3-15wt% of degassing agent. The hydroxyalkyl amide curing agent composition is prepared by mixing and fusing the three ingredients in proportion or carrying out melt extrusion on the three ingredients. According to the invention, by directly applying the composition in the formula of powdery paints, compared with respectively adding the three ingredients in the formula, better anti-yellowing and anti-pinhole performance of the film can be achieved.
Description
Technical field
The present invention relates to chemical field, specifically a kind of hydroxyalkyl amide curing agent composition and the purposes in powder coating thereof.
Background technology
Along with people are more and more higher to the requirement of health environment-friendly, although traditional carboxy(l)polyester/TGIC (isocyanuric acid three-glycidyl ester) system homogeneous, stable, adjustable, there is the requirement that good heat-resisting and weather resistance can meet user substantially, but its strong impulse smell and potential carinogenicity make to withdraw from the market become inevitable.
Hydroxyalky amide compound is generally acknowledged low toxic and environment-friendly type compound, now be widely used in daily use chemicals, tensio-active agent and paint field, particularly art of powder coatings are as the solidifying agent of polyester coating, there is reactive behavior strong, be applicable to low-temperature curing condition, storage characteristics is good.At present, hydroxyalkyl amide system replaces carboxy(l)polyester/TGIC gradually becomes the topmost integral part of outdoor powder coating systems.And along with the development of hydroxyalkyl amide system auxiliary products and technology, it in the whole world the shared ratio in outdoor powder coating market also in rapid growth.
But, the solidifying agent of polyester powder coating the most, on market, existing hydroxyalkyl amide product can discharge micromolecular compound in solidification process, therefore in the time that dope layer is blocked up, inevitably there will be pin hole, and this series products thermotolerance, yellowing resistance are poor, cause like this ornamental poor under some occasion, greatly limited the application of hydroxyalkyl amide solidifying agent and marketing.In hydroxyalkyl amide solidifying agent product, add air release agent and anti-yellowing change agent to become one of the most effective result of the above problems.
At present technique is mostly at formula pre-mixing stage, air release agent and anti-yellowing change agent to be joined respectively in formula, then mixes, melt extrudes, pulverizes and sieves and make coating powder.Disperse difficulty large, disperse evenly not, reduced product result of use.Or pin hole and xanthochromia can not be simultaneously be improved significantly, result of use is reduced.
Summary of the invention
Goal of the invention: for a kind of hydroxyalkyl amide curing agent composition is provided, this invention can improve the phenomenon of pin hole and xanthochromia simultaneously, maximizes anti-yellowing change and degasification effect.
Another object of the present invention is to provide a kind of environmental protection low toxicity, can in solidification process, reduce film pin hole, improve the hydroxyalkyl amide curing agent composition used for powder coating of film anti-yellowing property.
In order to reach as above object, the present invention takes following technical scheme: by following three kinds of components, be prepared from: hydroxyalkyl amide solidifying agent, 70-95% according to following part by weight melting mixing or the method that melt extrudes; Anti-yellowing change agent, 2-15%; Air release agent, 3-15%.
The further optimal technical scheme of the present invention is, described hydroxyalkyl amide solidifying agent is solid form, and chemical general formula is as follows:
In formula, A represents the organic group of a unit price or multivalence; R
1represent the alkyl of H or a C1-C5, R
2represent H or a C1-C5 alkyl or
n is the integer of 1-10, and n ' is 0 or 1.
The further optimal technical scheme of the present invention is, A can be selected from: the phenyl of the unit price that contains 1-12 carbon atom or the alkyl of multivalence or unit price or multivalence.
The further optimal technical scheme of the present invention is, A can be selected from: the described unit price that contains 1-12 carbon atom or the alkyl of multivalence are any one in the cycloalkyl of methyl, ethyl, propyl group, butyl, amyl group, hexyl, heptyl, octyl group, nonyl, decyl, unit price or multivalence.
The further optimal technical scheme of the present invention is, described anti-yellowing change agent is solid form, comprises at least one oxidation inhibitor and at least one UV light absorber.
The further optimal technical scheme of the present invention is, described oxidation inhibitor be in phosphorous acid esters, Hinered phenols, phenol/phosphite mixture, lactone/phosphite mixture material any one or several.
The further optimal technical scheme of the present invention is, described UV light absorber is one or more in triazines, benzotriazole category, hindered amines UV light absorber.
The further optimal technical scheme of the present invention is, described air release agent is solid form, is selected from one or more in Alpha-hydroxy ketone, crystallinity wax class air release agent.
The further optimal technical scheme of the present invention is, wherein the part by weight of three kinds of materials is: hydroxyalkyl amide solidifying agent, 80%; Anti-yellowing change agent, 10%; Air release agent, 10%.
As the purposes of above a kind of hydroxyalkyl amide curing agent composition as described in arbitrarily in powder coating.
The present invention is by degasifier, anti-yellowing change agent and hydroxyalkyl amide solidifying agent even melting mixing or mixing extrusion in advance, degasifier and anti-yellowing change agent are dispersed in curing agent composition, then composition is directly used in powder coating formula, can improve the phenomenon of pin hole and xanthochromia simultaneously, anti-yellowing change and degasification effect are maximized.And environmental protection low toxicity can further reduce film pin hole in solidification process, improve film anti-yellowing property.
Embodiment
Below embodiments of the invention are described, embodiment is not construed as limiting the invention:
Typical hydroxyalkyl amide solidifying agent can be selected from Primid XL552, the QM1260 of EMS, Vestagon HA320, the EP-HA376 etc. of Degussa.
Under described anti-yellowing agent normal temperature, be solid form, comprise at least one oxidation inhibitor and at least one UV light absorber.
Under described oxidation inhibitor normal temperature, be solid form, comprise: phosphorous acid esters, for example Ciba company limited produces
168,
126 etc.; Hinered phenols, for example Ciba company limited produces
1010,
1076,
245 etc.; Phenol/phosphite mixture, as Ciba company limited produces
b 225 etc.; Lactone/phosphite mixture, as Ciba company limited produces
xP 60 etc.;
Under described UV light absorber normal temperature, be solid form, comprise: triazines, for example Ciba company limited produces
405 etc.; Benzotriazole category, for example Ultraviolet Absorber UV-P, Ciba company limited produce
900 etc.; Hindered amines, as Ciba company limited produces
144 etc.; And the mixture of above-mentioned three types product.
Described air release agent is the commercially available froth breaking degasification series products of solid form, comprises Alpha-hydroxy ketone, as bitter almond oil camphor, Estron company produce
a-2,
a-4,
a-6; Crystallinity wax class, as the POWDERADD of Lubrizol company production
tM9062, LANCO
tMpP1362D, LANCO
tMflow P30, and upper two analogous products of stating product, etc.
The melting mixing machine that melting mixing extrusion molding adopts can be twin screw or single-screw intermixing extruder.Described melting mixing temperature is between upper and lower 10 DEG C of component A fusing point.
Adopt the SLJ-30A testing laboratory twin screw extruder of east, Yantai brightness powder equipment company limited, by formula and condition described in table 1, make respectively the hydroxyalkyl amide curing agent composition of routine 1-example 5.
Embodiment
In embodiment, batching used is as follows
Primid QM1260, EMS-CHEMIE company product
Vestagon HA320, Evonic Degussa company product
168,
126, Basf company product
1010,
1076, Basf company product
b 225, Basf company product
xP 60, Basf company product
405, Basf company product
900, Basf company product
144, Basf company product
Bitter almond oil camphor, Ningbo South-sea Chemical Co., Ltd.'s product
a-2,
a-4,
a-6, Estron company product
POWDERADD
tM9062, LANCO
tMflow P 30, Lubrizol company produces
SJ5122, the Primid of Anhui Shenjian New Material Co., Ltd. polyester, acid number 30-34mgKOH/g
SJ5101, the Primid of Anhui Shenjian New Material Co., Ltd. polyester, acid number 25-27mgKOH/g
PV88, universal BLP, Germany
-Chemie GmbH product
Table 1
Degasification performance test:
By the listed formulated powdered of table 2 coating: each listed component of filling a prescription is packed in plastics bag together, shake be mixed even, then at 105-115 DEG C with twin screw extruder mixing extrusion, compressing tablet, pulverize through coffee mill after cooling, cross 160 mesh sieves, obtain each formula powder coating.Above-mentioned corona spray gun used for powder coating electrostatic spraying is upper at heat-resisting stainless steel plate (0.5 × 70 × 100mm), then at 200 DEG C, toast 10min, solidify and obtain 70 respectively, 80,90,100,110,120, the film of 130,140,150 μ m, range estimation film pin hole situation, determines foaming minimum film thickness.
Gained film performance is as shown in table 2
Table 2
Yellowing resistance can be tested:
By all formulas in table 2, all spray the film that solidify to form 75 μ m thickness by same method, 200 DEG C of baking 1h in baking oven, by the b value of BYK Spainish CC-6807 type colour-difference meter mensuration film, result is as shown in table 3.
Table 3
Can find through above experimental data contrast:
After hydroxyalkyl amide, anti-yellowing change agent and three kinds of compositions of air release agent being made to composition in advance by the inventive method, be used further to (see formula 1-5) in powder coating formula, compared with the mentioned component of identical component, equal consumption is joined respectively (seeing formula 1C-5C) in powder coating formula, can obtain better anti-pin hole effect (minimum film thickness that bubbles is larger) and better anti-yellowing change effect (being that xanthochromia index b value is less).After the powder coating film forming of other two kinds of method gained, all can reach application requiring and without significant difference at the aspect of performance such as levelling, anti-impact.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.Those skilled in the art should understand the present invention and not be restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (10)
1. a hydroxyalkyl amide curing agent composition, is characterized in that, by following three kinds of components, is prepared from: hydroxyalkyl amide solidifying agent, 70-95% according to following part by weight melting mixing or the method that melt extrudes; Anti-yellowing change agent, 2-15%; Air release agent, 3-15%.
2. a kind of hydroxyalkyl amide curing agent composition according to claim 1, is characterized in that, described hydroxyalkyl amide solidifying agent is solid form, and chemical general formula is as follows:
In formula, A represents the organic group of a unit price or multivalence; R
1represent the alkyl of H or a C1-C5, R
2represent H or a C1-C5 alkyl or
n is the integer of 1-10, and n ' is 0 or 1.
3. a kind of hydroxyalkyl amide curing agent composition as claimed in claim 2, is characterized in that, A can be selected from: the phenyl of the unit price that contains 1-12 carbon atom or the alkyl of multivalence or unit price or multivalence.
4. a kind of hydroxyalkyl amide curing agent composition as claimed in claim 3, it is characterized in that, A can be selected from: the described unit price that contains 1-12 carbon atom or the alkyl of multivalence are any one in the cycloalkyl of methyl, ethyl, propyl group, butyl, amyl group, hexyl, heptyl, octyl group, nonyl, decyl, unit price or multivalence.
5. a kind of hydroxyalkyl amide curing agent composition as claimed in claim 1, is characterized in that, described anti-yellowing change agent is solid form, comprises at least one oxidation inhibitor and at least one UV light absorber.
6. a kind of hydroxyalkyl amide curing agent composition as claimed in claim 5, is characterized in that, described oxidation inhibitor be in phosphorous acid esters, Hinered phenols, phenol/phosphite mixture, lactone/phosphite mixture material any one or several.
7. a kind of hydroxyalkyl amide curing agent composition as claimed in claim 5, is characterized in that, described UV light absorber is one or more in triazines, benzotriazole category, hindered amines UV light absorber.
8. a kind of hydroxyalkyl amide curing agent composition according to claim 1, is characterized in that, described air release agent is solid form, is selected from one or more in Alpha-hydroxy ketone, crystallinity wax class air release agent.
9. a kind of hydroxyalkyl amide curing agent composition as claimed in claim 1, is characterized in that, wherein the part by weight of three kinds of materials is: hydroxyalkyl amide solidifying agent, 80%; Anti-yellowing change agent, 10%; Air release agent, 10%.
10. as the purposes of a kind of hydroxyalkyl amide curing agent composition of claim 1-9 as described in arbitrarily in powder coating.
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| CN102786830B true CN102786830B (en) | 2014-11-26 |
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| CN103122206A (en) * | 2013-03-12 | 2013-05-29 | 六安市捷通达化工有限责任公司 | Environment-friendly super weather-proof powder paint composition and preparation method |
| CN103319935A (en) * | 2013-06-26 | 2013-09-25 | 关锦池 | Hydroxyalkyl amide curing agent composition used for powder coating |
| CN103641737B (en) * | 2013-11-29 | 2016-04-20 | 六安市捷通达化工有限责任公司 | A kind of preparation method of carboxyl acid modified hydroxy alkyl amide curing agents |
| CN104817869A (en) * | 2015-03-30 | 2015-08-05 | 六安市捷通达化工有限责任公司 | Hydroxyalkylamide curing agent composition for powder coating materials, and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404517A (en) * | 2000-12-21 | 2003-03-19 | Ucb公司 | Powdered thermosetting composition for coatings |
| CN1766019A (en) * | 2005-09-22 | 2006-05-03 | 长江水利委员会长江科学院 | Nano composite aqueous epoxide resin coating material and preparation method |
| CN102010654A (en) * | 2010-11-16 | 2011-04-13 | 北方涂料工业研究设计院 | Method for preparing environmental-friendly high-performance polyurethane waterproof paint |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404517A (en) * | 2000-12-21 | 2003-03-19 | Ucb公司 | Powdered thermosetting composition for coatings |
| CN1766019A (en) * | 2005-09-22 | 2006-05-03 | 长江水利委员会长江科学院 | Nano composite aqueous epoxide resin coating material and preparation method |
| CN102010654A (en) * | 2010-11-16 | 2011-04-13 | 北方涂料工业研究设计院 | Method for preparing environmental-friendly high-performance polyurethane waterproof paint |
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