CN114316755A - Low-temperature curing low-light plane powder coating composition and coating thereof - Google Patents
Low-temperature curing low-light plane powder coating composition and coating thereof Download PDFInfo
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- CN114316755A CN114316755A CN202111596677.2A CN202111596677A CN114316755A CN 114316755 A CN114316755 A CN 114316755A CN 202111596677 A CN202111596677 A CN 202111596677A CN 114316755 A CN114316755 A CN 114316755A
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- 239000000843 powder Substances 0.000 title claims abstract description 60
- 239000008199 coating composition Substances 0.000 title claims abstract description 55
- 238000000576 coating method Methods 0.000 title claims abstract description 38
- 239000011248 coating agent Substances 0.000 title claims abstract description 36
- 238000013035 low temperature curing Methods 0.000 title claims abstract description 35
- 239000003822 epoxy resin Substances 0.000 claims abstract description 95
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 95
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- 229920001225 polyester resin Polymers 0.000 claims abstract description 51
- 239000004645 polyester resin Substances 0.000 claims abstract description 51
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 47
- 238000001723 curing Methods 0.000 claims abstract description 30
- 239000004593 Epoxy Substances 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims abstract description 12
- 239000006224 matting agent Substances 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 15
- 230000008033 biological extinction Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 18
- 239000000945 filler Substances 0.000 description 17
- 239000000049 pigment Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 238000007872 degassing Methods 0.000 description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 238000009472 formulation Methods 0.000 description 9
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 239000004408 titanium dioxide Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
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- 239000003973 paint Substances 0.000 description 2
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- 229920001187 thermosetting polymer Polymers 0.000 description 2
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
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- 229960002130 benzoin Drugs 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
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- 239000002270 dispersing agent Substances 0.000 description 1
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- 235000019382 gum benzoic Nutrition 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a low-temperature curing low-light plane powder coating composition and a coating thereof, which comprise carboxyl polyester resin with the acid value ranging from 60 to 80mgKOH/g and the viscosity of not higher than 5000mPa.s at 200 ℃, epoxy resin with the epoxy equivalent of 550-900g/eq and a flatting agent; the gelling time of the carboxyl polyester resin and the epoxy resin at 160 ℃ is not less than 800 seconds; the invention can complete curing molding under the temperature condition of 160 ℃, and the obtained cured coating not only presents effective extinction effect, but also keeps excellent leveling effect, and fills up the technical blank of curing the low-light plane cured coating at low temperature in the prior art.
Description
Technical Field
The invention belongs to the field of powder coating, and particularly relates to a low-temperature curing low-light plane powder coating composition and a coating applied to the low-temperature curing low-light plane powder coating composition.
Background
The thermosetting powder coating has the advantages of environmental protection, low energy consumption, convenient construction, no (at least extremely low) VOC emission and the like, so the thermosetting powder coating is widely used for replacing paint and water-based paint to realize protection and decoration of products in various fields.
In certain applications, it is desirable that the powder cured coating has both low gloss (film gloss not higher than 30% at a test angle of 60 °), high leveling rating (PC I leveling rating not lower than 7) and low temperature curing (curing of the coating can be achieved at a temperature of 160 ℃). However, there is no powder coating composition product that can satisfy these requirements for effects at the same time in the prior art, which is mainly due to the fact that the low-gloss, leveling and low-temperature curing three components adopted in the prior art are physically inhibited or conflicting, and therefore, the low-temperature curing low-gloss planar powder coating composition product is always in a blank state in the current market.
Therefore, the applicant wishes to develop this separately and search for new technical solutions to solve the above technical problems.
Disclosure of Invention
In view of the above, the present invention aims to provide a low-temperature-curable low-gloss planar powder coating composition and a coating thereof, which can be cured and formed at a temperature of 160 ℃, and the obtained cured coating not only exhibits an effective extinction effect, but also maintains an excellent leveling effect, thereby filling up the technical gap of low-temperature-curable low-gloss planar powder coatings in the prior art.
The technical scheme adopted by the invention is as follows:
a low-temperature curing low-light plane powder coating composition comprises carboxyl polyester resin with the acid value ranging from 60 to 80mgKOH/g and the viscosity of not higher than 5000mPa.s at 200 ℃, epoxy resin with the epoxy equivalent of 550-900g/eq and a flatting agent; the gel time of the carboxyl polyester resin and the epoxy resin at 160 ℃ is not less than 800 seconds.
Preferably, the low temperature cure low gloss flat powder coating composition has a gel time in the range of 90 to 200 seconds at 160 ℃.
Preferably, the ratio of the carboxyl polyester resin to the low-temperature curing low-light plane powder coating composition is not less than 20 wt%, and/or the ratio of the epoxy resin to the carboxyl polyester resin is 1:3-3: 1.
Preferably, the matting agent comprises
T-300 matting agent.
Preferably, the weight proportion of the flatting agent in the carboxyl polyester resin is 5-25 wt%.
Preferably, the viscosity of the carboxyl polyester resin at 200 ℃ ranges from 1500-.
Preferably, the epoxy resin includes a first epoxy resin and a second epoxy resin, wherein the epoxy equivalent of the first epoxy resin is smaller than the epoxy equivalent of the second epoxy resin.
Preferably, the epoxy equivalent of the first epoxy resin is in the range of 550-699g/eq, and the epoxy equivalent of the second epoxy resin is in the range of 700-900 g/eq.
Preferably, the first epoxy resin comprises a type 2 and/or type 2.5 epoxy resin and the second epoxy resin comprises a type 3 epoxy resin.
Preferably, the softening point temperature of the carboxyl polyester resin is 100-120 ℃, and/or the softening point temperature of the epoxy resin is less than 100 ℃.
Preferably, the coating is obtained by spraying and curing the low-temperature curing low-light plane powder coating composition on a substrate. Preferably, the coating has a leveling rating of no less than 7, more preferably 8 to 10, at 160 ℃ @15min of cure; meanwhile, under a test angle of 60 degrees, the glossiness of the coating is 10-30%.
It should be noted that the acid value detection standard referred to in the present application is in accordance with ISO 3682-1998; the detection standard of the viscosity value is ASTM D4287-1994, and the adopted detection equipment is ICI CONE-PLATE viscometer (CONE & PLATE); the detection standard of the related epoxy equivalent is GB/T4612-2008; the detection standard basis of the softening point temperature is as follows: GB/T12007.6-1989; the related vitrification temperature data is obtained by detection through a METTLER thermal analyzer, a Differential Scanning Calorimetry (DSC) is adopted as a detection method, and the heating and temperature rising speed parameter is set at 20 ℃/min; the gel time test criteria referred to throughout this application are: ISO 8130-6: 1992. It should be further specifically mentioned that, when the gel time of the carboxyl polyester resin and the epoxy resin at 160 ℃ is tested, the mixture of the carboxyl polyester resin and the epoxy resin needs to be prepared in advance, and the preparation method of the low-temperature curing low-light plane powder coating composition is fully referred to in the present application to prepare the mixture of the carboxyl polyester resin and the epoxy resin, and specifically comprises the following steps of: 1, respectively weighing, blending, melt extruding, crushing, grinding and the like, and then preparing a mixture of the carboxyl polyester resin and the epoxy resin for carrying out the gel time test.
The application creatively proposes a powder coating composition which is prepared from carboxyl polyester resin with high acid ester and low viscosity (the acid value is in the range of 60-80mgKOH/g and the viscosity is not higher than 5000mPa.s at 200 ℃), epoxy resin with high epoxy equivalent (the epoxy equivalent is 550-900g/eq) and a flatting agent with special flatting effect as the base resin curing system of the powder coating composition, the gelling time of the carboxyl polyester resin and the epoxy resin in the base resin curing system is not less than 800 seconds at 160 ℃, the applicant surprisingly finds that the powder coating composition adopting the base resin curing system can complete curing molding under the temperature condition of 160 ℃, the obtained cured coating not only presents an effective extinction effect, but also keeps an excellent leveling effect, and fills the technical blank of curing the low-light plane cured coating at low temperature in the prior art.
Detailed Description
The embodiment of the application provides a low-temperature curing low-light plane powder coating composition, which at least comprises the following raw materials:
a carboxyl polyester resin having an acid value in the range of 60 to 80mgKOH/g and a viscosity of not higher than 5000mPa.s at 200 ℃, wherein preferably the acid value is in the range of 65 to 80mgKOH/g, more preferably 65 to 75 mgKOH/g; preferably, the viscosity ranges from 1500-; preferably, in the present embodiment, the softening point temperature of the carboxyl polyester resin is 100-120 ℃. Specifically, in the present embodiment, SJT372 carboxyl polyester resin from Shenjian is selected, the acid value is in the range of 66-75mgKOH/g, the viscosity is in the range of 1500-4500mPa.s at 200 ℃, the softening point temperature is 100-110 ℃, and the glass transition temperature is about 53 ℃, although other carboxyl polyester resins represented by the preferred parameters described in the present embodiment can also be used;
epoxy resin with the epoxy equivalent of 550-900g/eq, preferably, the epoxy equivalent of 600-850g/eq, more preferably 600-800 g/eq; preferably, in this embodiment, the epoxy resin has a softening point temperature of less than 100 ℃, preferably from 75 to 98 ℃, more preferably from 80 to 95 ℃; for example, the epoxy resin can BE BE-502 epoxy resin provided by CCP from Changchun, with an epoxy equivalent of 600-650g/eq and a softening point temperature of 82-92 ℃; the E-12 epoxy resin from the Mount Huang jin peak can also be selected, the epoxy equivalent is 740-833g/eq, the softening point temperature is 89-93 ℃, and of course, other epoxy resins with the preferable parameter performance in the embodiment can also be adopted;
the matting agent can be any known matting agent in the prior art, and preferably, in this embodiment, the matting agent comprises a material from Shanghai rope chemical industry
T-300 matting agent, the applicants have surprisingly found in practice that when a matting agent in a powder coating composition comprises
When the T-300 flatting agent is used, an excellent flatting effect of the coating can be realized on the premise of not influencing the leveling property and the basic mechanical property of the coating; of course, the same as
T-300 matting agent has a similarly characterized performance.
In the present embodiment, the gel time of the carboxyl polyester resin and the epoxy resin at 160 ℃ is not less than 800 seconds, preferably 800-. Preferably, in order to facilitate the curing effect of the coating, in the present embodiment, the gel time of the low-temperature curing low-light plane powder coating composition at 160 ℃ is in the range of 90-200 seconds, preferably 100-200 seconds, and more preferably 110-180 seconds.
Preferably, in the present embodiment, the ratio of the carboxyl polyester resin to the low-temperature-curable low-gloss planar powder coating composition is not less than 20 wt%; more preferably 20 to 70 wt%, still more preferably 25 to 65 wt%, and still more preferably 28 to 50 wt%. Preferably, in order to further facilitate the coating to obtain the target effect, in the present embodiment, the weight ratio between the epoxy resin and the carboxyl polyester resin ranges from 1:3 to 3:1, more preferably 1: 2-2: 1, more preferably 1: 1.5-1: 1.5. preferably, in the present embodiment, the weight ratio of the matting agent to the carboxyl polyester resin is 5 to 25 wt%, more preferably 10 to 20 wt%, and further preferably 12 to 18 wt%.
Preferably, to further facilitate the coating to obtain the target effect, in the present embodiment, the epoxy resin includes a first epoxy resin and a second epoxy resin, wherein an epoxy equivalent of the first epoxy resin is smaller than an epoxy equivalent of the second epoxy resin; more preferably, the epoxy equivalent of the first epoxy resin is in the range of 550-699g/eq, more preferably 600-680 g/eq; the epoxy equivalent of the second epoxy resin is in the range of 700-900g/eq, more preferably 720-850 g/eq; preferably, in the present embodiment, the ratio of parts by weight between the first epoxy resin and the second epoxy resin ranges from 4: 1-1: 4, more preferably 1: 2-2: 1, more preferably 1: 1.5-1: 1.5.
preferably, in the present embodiment, the first epoxy resin includes a type 2 and/or type 2.5 epoxy resin, and the second epoxy resin includes a type 3 epoxy resin; among them, preferably, in the present embodiment, the type 2 and/or type 2.5 epoxy resin is prepared by a two-step synthesis process, and the type 3 epoxy resin is prepared by a two-step synthesis process; preferably, in this embodiment, the second epoxy resin may further include an epoxy resin prepared by a one-step synthesis process.
Particularly preferably, in the embodiment, the first epoxy resin is BE-502 epoxy resin provided by CCP from Changchun, and the second epoxy resin is E-12 epoxy resin from Mount Huang jin Feng; of course, the skilled person can select suitable first epoxy resin and second epoxy resin according to the actual situation, and the embodiment does not limit it specifically and only.
The carboxyl polyester resin, the epoxy resin and the flatting agent can be directly purchased and purchased in the market, and the raw material sources are easy to obtain.
In the practice of the present invention, it is also possible to add well-known pigments, fillers, leveling agents, degassing agents, antioxidants, curing agents, curing accelerators, dispersing agents or other well-known additives to the powder coating composition, which are selected by the ordinary skill of the person skilled in the art; among these, it is noted that, since the known curing agents require higher curing temperatures and the curing agents and/or curing accelerators may significantly shorten the gel time of the base resin curing system in this embodiment, thereby affecting the leveling and leveling effect of the coating, it is recommended that no additional curing agents and/or curing accelerators be added, or that the addition rate should not exceed 6 wt%, more preferably not more than 4 wt% of the powder coating composition. In the present embodiment, the pigment and/or filler may be barium sulfate and/or titanium dioxide or aluminum hydroxide and/or carbon black and/or other known pigments and fillers. It should also be noted that since the addition of excessive amounts of pigments and/or fillers can significantly affect the leveling effect of the coating, the application suggests that excessive amounts of fillers are not to be added, preferably not more than 45 wt% of the powder coating composition, and preferably may be added in the range of 1 to 40 wt%, more preferably 5 to 35 wt%.
The powder coating composition of the present embodiment can be prepared by a known process such as mixing of raw materials, melt extrusion, and crushing, but it is needless to say that the powder coating composition of the present embodiment can be obtained by other known preparation processes, and the preparation process is not particularly limited in the present application.
Preferably, the embodiment also provides a coating which is obtained by spraying and curing the low-temperature curing low-light plane powder coating composition on a substrate; the base material may be various metals or various non-metallic materials (for example, wood or glass materials), and in this embodiment, the base material is preferably a metal material such as an aluminum or iron base material. The present embodiment can achieve the completion of curing and forming at a temperature of 160 ℃ or even lower and in a reasonable time (for example, no higher than 25 minutes, preferably no higher than 20 minutes), wherein the coating thickness of the present embodiment can be specifically selected according to actual needs, and the suggested coating thickness range is 60-120 μm (the test standard is according to ISO 2360-2017). Particularly preferably, in the present embodiment, the leveling grade of the coating is not lower than 7 grade, more preferably 8-10 grade, under the curing condition of 160 ℃ @15 minutes; at the same time, the gloss of the coating is not higher than 30%, preferably 10-30%, at a test angle of 60 °.
In order to verify the technical effects of the present application, the following examples were specifically carried out as the raw materials for the formulation of the powder coating composition of the present application for comparison of the specific test properties:
example 1: a low-temperature curing low-light plane powder coating composition comprises the following raw materials in percentage by weight: 45 parts of carboxyl polyester resin, wherein the model is SJT372 carboxyl polyester resin from Shenjian; 45 parts of epoxy resin, wherein the type is BE-502 epoxy resin provided by CCP from Changchun; 5 parts of flatting agent, the type is from Shanghai cable, and the flatting agent is chemical
A T-300 matting agent; 2 parts of a leveling agent, wherein the model is Resiflow PL-200 from Esterlun; 1 part of degassing agent, specifically benzoin; and 2 parts of pigment and filler, specifically titanium dioxide.
Example 2: the rest technical scheme of the embodiment 2 is the same as that of the embodiment 1, except that the embodiment 2 provides a low-temperature curing low-light plane powder coating composition, and the formula raw materials are as follows: 40 parts of carboxyl polyester resin; 28 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; and 24 parts of pigment and filler, specifically comprising 20 parts of titanium dioxide and 4 parts of barium sulfate.
Example 3: the rest technical scheme of this example 3 is the same as that of example 1, except that this example 3 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 40 parts of carboxyl polyester resin; 20 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; 32 parts of pigment and filler, specifically comprising 25 parts of titanium dioxide and 7 parts of barium sulfate.
Example 4: the rest technical scheme of this example 4 is the same as that of example 1, except that this example 4 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 30 parts of carboxyl polyester resin; 30 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; 32 parts of pigment and filler.
Example 5: the rest technical scheme of this example 5 is the same as that of example 1, except that this example 5 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 20 parts of carboxyl polyester resin; 50 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; and 22 parts of pigment and filler.
Example 6: the rest technical scheme of this example 6 is the same as that of example 1, except that this example 6 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 50 parts of carboxyl polyester resin; 20 parts of epoxy resin; 8 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; and 19 parts of pigment and filler, specifically comprising 10 parts of barium sulfate and 9 parts of aluminum hydroxide.
Example 7: the rest technical scheme of this example 7 is the same as that of example 1, except that this example 7 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 60 parts of carboxyl polyester resin; 30 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; 2 parts of a degassing agent; 1 part of curing agent, specifically TGIC.
Example 8: the rest technical scheme of this example 8 is the same as that of example 1, except that this example 8 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 70 parts of carboxyl polyester resin; 22 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; and 1 part of degassing agent.
Example 9: the rest technical scheme of this example 9 is the same as that of example 1, except that this example 9 proposes a low-temperature curing low-gloss planar powder coating composition, and the formulation raw materials are: 45 parts of carboxyl polyester resin; 45 parts of epoxy resin; 5 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; 1 part of antioxidant specifically selects antioxidant which is publicly sold in the market; 1 part of curing accelerator, specifically, imidazole curing accelerator publicly sold on the market is selected.
Example 10: the rest of the technical scheme of the embodiment 10 is the same as the embodiment 1, except that the type of the epoxy resin in the embodiment 1 is replaced by E-12 epoxy resin from Mount Huang jin peak.
Example 11: the remaining technical solution of this example 11 is the same as that of example 1, except that the carboxyl polyester resin type in example 1 was replaced with SJ3B polyester resin from Shenjian, which had an acid value of 68-75mgKOH/g, a viscosity range of 3500-5000mPa.s at 200 ℃, a softening point temperature of 105-115 ℃ and a glass transition temperature of about 53 ℃.
Example 12: the rest of the technical scheme of the embodiment 12 is the same as that of the embodiment 1, the embodiment 10 or the embodiment 11, and the difference is that 2 parts of another type of the flatting agent is further added on the basis of keeping 100 parts by weight; x505 matting agent from Simpson, parts by weight of pigment and filler were removed.
Example 13: the rest of the technical scheme of the embodiment 13 is the same as that of the embodiment 2, except that 2 parts of another type of matting agent is further added on the basis of keeping 100 parts by weight, wherein the type is as follows; x505 matting agent from simpson reduced 20 parts titanium dioxide to 18 parts titanium dioxide.
Example 14: the rest of the technical scheme of the embodiment 14 is the same as that of the embodiment 1, the embodiment 10 or the embodiment 11, and the difference is that
The T-300 matting agent was replaced with X505 matting agent from Simpson.
Example 15: the remaining technical solution of the present example 15 is the same as that of the embodiment 1, the embodiment 10 or the embodiment 11, except that
Replacement of T-300 matting agent with that from Shanghai cable is chemical
T-600 matting agent.
Example 16: the rest of the technical solution of this example 16 is the same as that of example 1, except that this example 16 proposes a low-temperature curing low-gloss planar powder coating composition, which comprises the following raw materials: 45 parts of carboxyl polyester resin; 25 parts of first epoxy resin, wherein the type is BE-502 epoxy resin provided by CCP from Changchun; 20 parts of second epoxy resin, wherein the type of the second epoxy resin is E-12 epoxy resin from Huangshan brocade peak; 8 parts of a light-eliminating agent; 1 part of a leveling agent; and 1 part of degassing agent.
Example 17: the rest technical scheme of this example 17 is the same as that of example 16, except that this example 17 proposes a low-temperature curing low-gloss planar powder coating composition, which comprises the following raw materials: 35 parts of carboxyl polyester resin; 15 parts of a first epoxy resin; 20 parts of second epoxy resin; 8 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; and 19 parts of pigment and filler.
Example 18: the rest technical scheme of this example 18 is the same as that of example 16, except that this example 18 proposes a low-temperature curing low-gloss planar powder coating composition, which comprises the following raw materials: 35 parts of carboxyl polyester resin; 17.5 parts of first epoxy resin; 17.5 parts of second epoxy resin; 6 parts of a flatting agent; 2 parts of a leveling agent; 1 part of degassing agent; 1 part of curing accelerator, specifically selecting imidazole curing accelerators publicly sold in the market; and 20 parts of pigment and filler.
Comparative example 1: the rest technical scheme of the comparative example 1 is the same as that of the example 1, except that the comparative example 1 provides a powder coating composition, and the formula raw materials are as follows: 45 parts of carboxyl polyester resin; 45 parts of epoxy resin; 2 parts of a leveling agent; 1 part of degassing agent; 7 parts of pigment and filler.
Comparative example 2: the remaining technical solution of comparative example 2 is identical to that of example 1, except that the carboxylated polyester resin of example 1 is replaced by a Uralac P838 type saturated carboxylated polyester resin from DSM, having an acid number of 24 to 26mgKOH/g, a viscosity at 160 ℃ of 22 to 44Pa.s and a glass transition temperature of about 56 ℃.
Comparative example 3: the remaining technical solution of this comparative example 3 is the same as that of example 1 except that the carboxyl polyester resin in example 1 was replaced with SJ4867 polyester resin from Shenjian (acid value 29-35 mgKOH/g, viscosity 5500-7500mPa. s at 200 ℃).
Comparative example 4: the rest of the technical scheme of the comparative example 4 is the same as the embodiment 1, except that the epoxy resin in the embodiment 1 is replaced by GMA1618 acrylic resin of Ningbo south sea chemistry, the epoxy equivalent is 400-430g/eq, and the softening point temperature is 92-97 ℃.
Comparative example 5: the remaining technical solution of comparative example 5 is the same as that of example 1, except that the epoxy resin in example 1 is replaced with the epoxy resin from
T-300 matting agent.
The powder coating compositions prepared in the above examples 1-18 and comparative examples 1-5 respectively are sprayed on aluminum substrates of the same type and cured (curing conditions are uniformly selected to be 160 ℃ for @15min) to obtain cured coatings, and the thickness of each cured coating is 70-90 μm. The present application performs a comparison of the performance tests shown in table 1 below for each cured coating:
table 1 comparative table of performance tests of examples and comparative examples of the present application
From the above comparative results, it should be further noted that the Applicant has surprisingly found that, when in practice, the formulation raw materials of the powder coating compositions comprise
When the flatting agent is T-300, under the curing condition of 160 ℃ for @15min, the cured coating has excellent and stable leveling, low-light and mechanical performance, and further, when a small amount of pigment and filler is added, even no pigment and filler is added, the obtained cured coating has better and stable leveling and low-light performance; in addition, the applicant also found by implementation that the storage stability of examples 16, 17 and 18 is not only good, but also has more stable target coating performance, and the storage stability is a more preferable technical solution.
It should be noted that the performance test related to this example is performed according to the test standard or condition described in the following table 2.
TABLE 2 test items and test standards or conditions
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description of the embodiments is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (11)
1. A low-temperature curing low-light plane powder coating composition is characterized by comprising carboxyl polyester resin with the acid value ranging from 60 to 80mgKOH/g and the viscosity of not higher than 5000mPa.s at 200 ℃, epoxy resin with the epoxy equivalent of 550-900g/eq and a flatting agent; the gel time of the carboxyl polyester resin and the epoxy resin at 160 ℃ is not less than 800 seconds.
2. The low temperature cure low gloss planar powder coating composition of claim 1, wherein the low temperature cure low gloss planar powder coating composition has a gel time in the range of 90 to 200 seconds at 160 ℃.
3. The low temperature-curable low-gloss planar powder coating composition according to claim 1, wherein the carboxyl polyester resin accounts for not less than 20 wt% of the low temperature-curable low-gloss planar powder coating composition, and/or the weight ratio between the epoxy resin and the carboxyl polyester resin is in a range of 1:3 to 3: 1.
4. The low temperature cure low gloss planar powder coating composition of claim 1, wherein the matting agent comprises
T-300 matting agent.
5. The low temperature curing low light level powder coating composition of claim 1 wherein the matting agent comprises 5 to 25 wt% of the carboxyl polyester resin.
6. The low temperature curing low light level powder coating composition of claim 1, wherein the viscosity of the carboxyl polyester resin at 200 ℃ is in the range of 1500-4500 mpa.s.
7. The low temperature-curable low gloss planar powder coating composition of claim 1, wherein the epoxy resin comprises a first epoxy resin and a second epoxy resin, wherein the epoxy equivalent weight of the first epoxy resin is less than the epoxy equivalent weight of the second epoxy resin.
8. The low temperature curing low light level powder coating composition as claimed in claim 7, wherein the epoxy equivalent weight of the first epoxy resin is in the range of 550-699g/eq, and the epoxy equivalent weight of the second epoxy resin is in the range of 700-900 g/eq.
9. The low temperature-curable low gloss planar powder coating composition of claim 7, wherein the first epoxy resin comprises a type 2 and/or type 2.5 epoxy resin and the second epoxy resin comprises a type 3 epoxy resin.
10. The low temperature curable low light level powder coating composition of claim 1, wherein the carboxyl polyester resin has a softening point temperature of 100-120 ℃ and/or the epoxy resin has a softening point temperature of less than 100 ℃.
11. A coating obtained by spraying and curing a low-temperature-curable low-gloss flat powder coating composition according to any one of claims 1 to 10 on a substrate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011214A (en) * | 2022-08-10 | 2022-09-06 | 山东信科新材料有限公司 | Powder coating with photocatalytic function and preparation method thereof |
| CN116716026A (en) * | 2023-07-18 | 2023-09-08 | 老虎表面技术新材料（苏州）有限公司 | Metal effect powder coating composition, curing method and coating thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415545A (en) * | 2011-02-14 | 2013-11-27 | 佐敦粉末涂料（N）公司 | Powder coating |
| CN104277685A (en) * | 2014-10-31 | 2015-01-14 | 安徽神剑新材料股份有限公司 | Powder coating |
| CN107474702A (en) * | 2017-08-18 | 2017-12-15 | 安徽华辉塑业科技股份有限公司 | A kind of high decoration type powdery paints applied on household electrical appliance |
| CN107573808A (en) * | 2017-08-18 | 2018-01-12 | 安徽华辉塑业科技股份有限公司 | A kind of powdery paints applied to microwave oven surfaces spraying |
| CN110041810A (en) * | 2019-04-23 | 2019-07-23 | 江苏海獭新材料科技有限公司 | A kind of preparation method of low-temperature setting compound resin powdery paints |
-
2021
- 2021-12-24 CN CN202111596677.2A patent/CN114316755A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415545A (en) * | 2011-02-14 | 2013-11-27 | 佐敦粉末涂料（N）公司 | Powder coating |
| CN104277685A (en) * | 2014-10-31 | 2015-01-14 | 安徽神剑新材料股份有限公司 | Powder coating |
| CN107474702A (en) * | 2017-08-18 | 2017-12-15 | 安徽华辉塑业科技股份有限公司 | A kind of high decoration type powdery paints applied on household electrical appliance |
| CN107573808A (en) * | 2017-08-18 | 2018-01-12 | 安徽华辉塑业科技股份有限公司 | A kind of powdery paints applied to microwave oven surfaces spraying |
| CN110041810A (en) * | 2019-04-23 | 2019-07-23 | 江苏海獭新材料科技有限公司 | A kind of preparation method of low-temperature setting compound resin powdery paints |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011214A (en) * | 2022-08-10 | 2022-09-06 | 山东信科新材料有限公司 | Powder coating with photocatalytic function and preparation method thereof |
| CN115011214B (en) * | 2022-08-10 | 2022-11-25 | 山东信科新材料有限公司 | Powder coating with photocatalytic function and preparation method thereof |
| CN116716026A (en) * | 2023-07-18 | 2023-09-08 | 老虎表面技术新材料（苏州）有限公司 | Metal effect powder coating composition, curing method and coating thereof |
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Application publication date: 20220412 |