CN116218273B - Modified red mud, preparation method thereof and application thereof in powder coating - Google Patents
Modified red mud, preparation method thereof and application thereof in powder coating Download PDFInfo
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- CN116218273B CN116218273B CN202310297479.9A CN202310297479A CN116218273B CN 116218273 B CN116218273 B CN 116218273B CN 202310297479 A CN202310297479 A CN 202310297479A CN 116218273 B CN116218273 B CN 116218273B
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- 239000000843 powder Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 54
- 239000011248 coating agent Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- -1 polyethylene Polymers 0.000 claims abstract description 43
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004698 Polyethylene Substances 0.000 claims abstract description 38
- 229920000573 polyethylene Polymers 0.000 claims abstract description 38
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000001035 drying Methods 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 229920001225 polyester resin Polymers 0.000 claims abstract description 25
- 239000004645 polyester resin Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 238000007873 sieving Methods 0.000 claims abstract description 20
- 239000007822 coupling agent Substances 0.000 claims abstract description 14
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 10
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 10
- 239000010445 mica Substances 0.000 claims abstract description 10
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 10
- 239000000049 pigment Substances 0.000 claims abstract description 7
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical group C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 18
- 244000028419 Styrax benzoin Species 0.000 claims description 9
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 9
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- 229960002130 benzoin Drugs 0.000 claims description 9
- 235000019382 gum benzoic Nutrition 0.000 claims description 9
- 239000012860 organic pigment Substances 0.000 claims description 9
- 229920000058 polyacrylate Polymers 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003063 flame retardant Substances 0.000 abstract description 11
- 238000005282 brightening Methods 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 21
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229920000728 polyester Polymers 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XSAOTYCWGCRGCP-UHFFFAOYSA-K aluminum;diethylphosphinate Chemical compound [Al+3].CCP([O-])(=O)CC.CCP([O-])(=O)CC.CCP([O-])(=O)CC XSAOTYCWGCRGCP-UHFFFAOYSA-K 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006085 branching agent Substances 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- WYHYNUWZLKTEEY-UHFFFAOYSA-N cyclobutane-1,3-dicarboxylic acid Chemical compound OC(=O)C1CC(C(O)=O)C1 WYHYNUWZLKTEEY-UHFFFAOYSA-N 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009477 glass transition Effects 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
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 150000007519 polyprotic acids Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K2003/026—Phosphorus
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention discloses modified red mud, which is prepared from the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are mixed according to the mass ratio of 10-30:2-6:1-5; the preparation method of the modified red mud comprises the following steps: s1: screening the red mud, then cleaning with deionized water, drying, grinding and sieving for standby; s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, and mixing and stirring for 1-2h; s3: drying, grinding and sieving the product obtained in the step S2 to obtain modified red mud; the application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: saturated polyester resin, hydroxyalkylamide, mica powder, titanium dioxide, pigment, flatting agent, degasifying agent, brightening agent, coupling agent and modified red mud. The modified red mud disclosed by the invention can improve the flame retardant property of the powder coating, and is strong in mechanical property and good in weather resistance.
Description
Technical Field
The invention belongs to the technical field of powder coatings, and particularly relates to modified red mud, a preparation method thereof and application thereof in the powder coating.
Background
Powder coatings are quite different from general coatings in form of fine powder. Since no solvent is used, it is called a powder coating. The powder coating is mainly characterized in that: has the characteristics of innocuity, high efficiency, resource conservation and environmental protection. Powder coatings fall into two main categories: thermoplastic powder coatings and thermosetting powder coatings. The thermoplastic powder coating consists of thermoplastic resin, pigment, stuffing, plasticizer, stabilizer, etc. The thermoplastic powder coating comprises: polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide, cellulose, polyester, and the like. The thermosetting powder paint consists of thermosetting resin, curing agent, pigment, stuffing, assistant, etc. The thermosetting powder coating comprises: epoxy resins, epoxy-polyester resins, polyurethane resins, acrylic resins, and the like.
The polyester/Primid type powder coating is prepared by adopting polyester resin and Primid curing agent as main raw materials, has the characteristics of good adhesive force, good mechanical property, smooth and smooth coating film, good chemical resistance and corrosion resistance, easy pinhole occurrence of thick coating, high storage stability and shelf life compared with TGIC (thermal sensitive adhesive), capability of being prepared into various gloss and colorful colors, and suitability for decoration and protection of various outdoor products: such as household appliances, architectural aluminum profiles, traffic facilities, stadium facilities, courtyard facilities, etc.
The invention discloses a polyester resin for a Primid system low-temperature curing super weather-resistant powder coating and a preparation method thereof, wherein the acid value of the polyester resin is 30-38 mgKOH/g, the glass transition temperature is 55-65 ℃, the melt viscosity at 200 ℃ is 2500-6000 mPa.s, and the polyester resin is prepared from the following raw materials: 28 to 43 percent of polyol, 0.1 to 1.8 percent of branching agent, 39 to 63 percent of polybasic acid, 1 to 10 percent of epoxy-based ternary ethylene copolymer, 3 to 12 percent of acidolysis agent, 0.5 to 6 percent of 1, 3-cyclobutane dicarboxylic acid, 0.06 to 0.23 percent of esterification catalyst and 0.5 to 1.0 percent of antioxidant. The polyester resin can be used for preparing super weather-resistant powder coating with beta-hydroxyalkylamide compound, the prepared powder coating has good storage stability, can be cured at 140-160 ℃, and the cured coating has excellent ageing resistance and impact resistance.
The Chinese patent (publication No. CN 103571313B) discloses a hydroxyalkyl amide type high leveling powder coating, a polyester resin for the coating and a preparation method thereof, wherein the polyester resin comprises a polyester resin, a curing agent, a filler and an auxiliary agent, the polyester resin is amorphous saturated polyester resin and semi-crystalline saturated polyester resin, and the ratio of the amorphous saturated polyester resin to the semi-crystalline saturated polyester resin is 90:10-50:50. The invention also discloses the polyester resin and the preparation method thereof. Compared with the prior art, the powder coating provided by the invention has better horizontal fluidity, is beneficial to improving the appearance of a plate surface, and reduces the phenomenon of thick film pinholes common in a hydroxyalkylamide system.
The powder coating prepared by the technical scheme has the technical problem of low flame retardance.
Disclosure of Invention
The invention aims to provide modified red mud, a preparation method thereof and application thereof in powder coating, which can solve the technical problem of lower flame retardance of polyester/Primid type powder coating in the prior art and can improve the flame retardance of the polyester/Primid type powder coating.
The modified red mud comprises the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are mixed according to the mass ratio of 10-30:2-6: 1-5.
Further, the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are prepared from the following components in percentage by mass: 2-4:1-3.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, then cleaning with deionized water, drying, grinding and sieving for standby;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, and mixing and stirring for 1-2h;
s3: and (3) drying, grinding and sieving the product obtained in the step (S2) to obtain the modified red mud.
Further, in the step S1, the drying temperature is 80-100 ℃ and the drying time is 8-12h.
Further, the drying temperature is 60-80 ℃ and the drying time is 8-12h.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 120-200 parts of saturated polyester resin, 8-12 parts of hydroxyalkylamide, 30-50 parts of mica powder, 50-80 parts of titanium dioxide, 1.5-2 parts of flatting agent, 12-20 parts of pigment, 1-1.5 parts of degasifying agent, 1-2 parts of brightening agent, 1.2-2 parts of coupling agent and 80-100 parts of modified red mud.
Further, the pigment is an organic pigment.
Further, the leveling agent is polyacrylate leveling agent.
Further, the degasifying agent is benzoin.
Further, the coupling agent is a titanate coupling agent.
Compared with the prior art, the invention has the beneficial effects that:
1. the modified red mud is prepared from microencapsulated red phosphorus and grafted maleic anhydride polyethylene, and the microencapsulated red phosphorus can effectively inhibit PH after being coated 3 The formation of the red phosphorus, the water absorption is reduced, the self-ignition point and the thermal stability of red phosphorus are improved, the dispersibility of the red phosphorus in a system is improved, and the microencapsulated red phosphorus is heated to decompose to generate oxygen acid of phosphorus, so that red mud can be neutralized to generate more acid sites on the surface of the red mud, thereby catalyzing condensed phase to form carbon, reducing the release of combustible gas to a gas-phase combustion area and improving the flame retardance of the modified red mud; the grafted maleic anhydride polyethylene can improve the compatibility of the system and improve the oxygen content index of the system, so that the flame retardance is improved, and the two materials are cooperated to modify the red mud, so that the flame retardance is improved.
2. The invention controls the mass ratio of red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene to be 10-30:2-6:1-5, a better flame-retardant effect can be achieved, and the flame retardant property of the powder coating is obviously improved.
3. The powder coating adopts a polyester/Primid system, has the characteristics of good adhesive force, good mechanical property, smooth and smooth coating film and good chemical resistance and corrosion resistance, can improve the flame retardant property of the coating by adding the modified red mud, improves the safety, expands the application range of the polyester/Primid powder coating, and improves the economic benefit.
4. According to the invention, the modified red mud is added into the powder coating, the red mud can play a certain role in filling, and has a certain positive effect on the mechanical property and the mechanical property of the coating, so that the use of other fillers can be reduced, the industrial waste red mud can be reused, the production cost is reduced, waste is changed into valuable, the problems of waste accumulation and treatment can be solved, and the environmental pollution is reduced.
Detailed Description
Before the embodiments of the invention are explained in further detail, it is to be understood that the invention is not limited in its scope to the particular embodiments described below; it is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention.
The modified red mud comprises the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are mixed according to the mass ratio of 10-30:2-6: 1-5.
The mass ratio of the red mud to the microencapsulated red phosphorus to the grafted maleic anhydride polyethylene is 12-25:2-4:1-3.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 80-100deg.C for 8-12 hr, grinding, and sieving;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, and mixing and stirring for 1-2h;
s3: and (3) drying the product obtained in the step (S2) at the temperature of 60-80 ℃ for 8-12 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 120-200 parts of saturated polyester resin, 8-12 parts of hydroxyalkylamide, 30-50 parts of mica powder, 50-80 parts of titanium dioxide, 12-20 parts of organic pigment, 1.5-2 parts of polyacrylate, 1-1.5 parts of benzoin, 1-2 parts of gloss enhancer, 1.2-2 parts of titanate coupling agent and 80-100 parts of modified red mud.
The following is a description of more specific examples.
Example 1
The modified red mud comprises the following raw materials: the mass ratio of the red mud to the microencapsulated red phosphorus to the grafted maleic anhydride polyethylene is 25:4: 1.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 100 ℃ for 10 hours, grinding and sieving for later use;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, mixing and stirring for 1h;
s3: and (3) drying the product obtained in the step (S2) at the temperature of 80 ℃ for 12 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 200 parts of saturated polyester resin, 10 parts of hydroxyalkylamide, 30 parts of mica powder, 60 parts of titanium dioxide, 15 parts of organic pigment, 1.5 parts of polyacrylate, 1.2 parts of benzoin, 2 parts of 701 brightening agent, 1.5 parts of titanate coupling agent and 90 parts of modified red mud.
Example 2
The modified red mud comprises the following raw materials: the mass ratio of the red mud to the microencapsulated red phosphorus to the grafted maleic anhydride polyethylene is 10:2:3, preparing.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 80 ℃ for 12 hours, grinding and sieving for later use;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, mixing and stirring for 1h;
s3: and (3) drying the product obtained in the step (S2) at 90 ℃ for 10 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 160 parts of saturated polyester resin, 9 parts of hydroxyalkylamide, 50 parts of mica powder, 70 parts of titanium dioxide, 12 parts of organic pigment, 1.8 parts of polyacrylate, 1.5 parts of benzoin, 1 part of 701 brightening agent, 2 parts of titanate coupling agent and 80 parts of modified red mud.
Example 3
The modified red mud comprises the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are prepared from the following components in percentage by mass: 6: 1.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 100 ℃ for 12 hours, grinding and sieving for later use;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, mixing and stirring for 2 hours;
s3: and (3) drying the product obtained in the step (S2) at the temperature of 80 ℃ for 12 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 120 parts of saturated polyester resin, 8 parts of hydroxyalkylamide, 30 parts of mica powder, 80 parts of titanium dioxide, 18 parts of organic pigment, 2 parts of polyacrylate, 1 part of benzoin, 1 part of 701 brightening agent, 1.8 parts of titanate coupling agent and 100 parts of modified red mud.
Example 4
The modified red mud comprises the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are prepared from the following components in percentage by mass: 6: 5.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 90 ℃ for 8 hours, grinding and sieving for later use;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, mixing and stirring for 1h;
s3: and (3) drying the product obtained in the step (S2) at the temperature of 60 ℃ for 8 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 180 parts of saturated polyester resin, 12 parts of hydroxyalkylamide, 40 parts of mica powder, 60 parts of titanium dioxide, 16 parts of organic pigment, 1.6 parts of polyacrylate, 1.2 parts of benzoin, 2 parts of 701 brightening agent, 1.2 parts of titanate coupling agent and 90 parts of modified red mud.
Example 5
The modified red mud comprises the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are prepared from the following components in percentage by mass: 5:3, preparing.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 85 ℃ for 10 hours, grinding and sieving for later use;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, mixing and stirring for 2 hours;
s3: and (3) drying the product obtained in the step (S2) at the temperature of 80 ℃ for 9 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 150 parts of saturated polyester resin, 12 parts of hydroxyalkylamide, 50 parts of mica powder, 50 parts of titanium dioxide, 20 parts of organic pigment, 2 parts of polyacrylate, 1 part of benzoin, 1 part of 701 brightening agent, 1.6 parts of titanate coupling agent and 80 parts of modified red mud.
Example 6
The modified red mud comprises the following raw materials: the red mud, the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene are prepared from the following components in percentage by mass: 3: 5.
The preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, cleaning with deionized water, drying at 95 ℃ for 8 hours, grinding and sieving for later use;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, mixing and stirring for 2 hours;
s3: and (3) drying the product obtained in the step (S2) at the temperature of 70 ℃ for 10 hours, grinding and sieving to obtain the modified red mud.
The application of the modified red mud in the powder coating comprises the following raw materials in parts by weight: 140 parts of saturated polyester resin, 10 parts of hydroxyalkylamide, 30 parts of mica powder, 80 parts of titanium dioxide, 12 parts of organic pigment, 1.5 parts of polyacrylate, 1.4 parts of benzoin, 2 parts of 701 brightening agent, 2 parts of titanate coupling agent and 100 parts of modified red mud.
Comparative example 1
Substantially the same as in example 3, except that no microencapsulated red phosphorus and grafted maleic anhydride polyethylene were added to the modified red mud.
Comparative example 2
Substantially the same as in example 3, except that no microencapsulated red phosphorus was added to the modified red mud.
Comparative example 3
Substantially the same as in example 3, except that no grafted maleic anhydride polyethylene was added to the modified red mud.
Comparative example 4
Substantially the same as in example 3, except that modified red mud was not added, an aluminum diethylphosphinate flame retardant was used.
Comparative example 5
The method is basically the same as in example 3, except that in the modified red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene are mixed according to the mass ratio of 5:1: 8.
Comparative example 6
The method is basically the same as in example 3, except that in the modified red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene are prepared according to the mass ratio of 35:10: 0.3.
Comparative example 7
The method is basically the same as that of the example 3, except that in the modified red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene are prepared according to the mass ratio of 3:8: 0.5.
1. Flame retardant Property test
The powder coatings prepared in examples 1 to 6 and comparative examples 1 to 7 were poured into polytetrafluoroethylene molds, and limiting oxygen index test was performed using a JF-3 type limiting oxygen index meter, and limiting oxygen index LOI was expressed in terms of volume percent, and the calculation method was:
LOI＝C F +Kd
wherein: LOI-limiting oxygen index (%); c (C) F The last oxygen concentration (%) in the test; k-factor; d-oxygen concentration difference (%) in test.
The limiting oxygen index criteria were:
LOI is less than 22, and the fuel is inflammable; LOI is less than or equal to 22 and less than 27, and is flammable; LOI is more than or equal to 27, and is difficult to burn.
The experimental data obtained are presented in table 1.
TABLE 1LOI values
| Project | LOI(％) |
| Example 1 | 32.4 |
| Example 2 | 32.7 |
| Example 3 | 33.1 |
| Example 4 | 32.5 |
| Example 5 | 31.6 |
| Example 6 | 30.3 |
| Comparative example 1 | 17.4 |
| Comparative example 2 | 25.9 |
| Comparative example 3 | 27.5 |
| Comparative example 4 | 28.8 |
| Comparative example 5 | 28.4 |
| Comparative example 6 | 29.7 |
| Comparative example 7 | 29.1 |
As can be seen from table 1:
(1) The LOI values of examples 1-5 of the present application were 32.4%, 32.7%, 33.1%, 32.5%, 31.6%, respectively, all achieved flame retardant grades, wherein the LOI value of example 3 reached 33.1%, with very high flame retardant properties. In contrast, comparative examples 1 to 4 had LOI values of 17.4%, 25.9%, 25.7% and 28.8% respectively, and the flame retarding effects of examples 1 to 6 were not achieved.
And the LOI values of comparative example 1 without the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene and comparative example 2 without the microencapsulated red phosphorus and comparative example 3 without the grafted maleic anhydride polyethylene are not the same as those of examples 1-6, thus the synergistic effect is generated between the microencapsulated red phosphorus and the grafted maleic anhydride polyethylene in the modified red mud, and the flame retardance of the modified red mud is improved together, so that the flame retardance of the powder coating is improved.
In addition, in comparative example 4, the LOI values of the conventional flame retardant diethyl phosphinic acid aluminum are not the same as those of examples 1-6, which shows that the invention has obvious improvement compared with the prior art.
(2) The LOI values of comparative examples 5 to 7 are 28.4 percent, 29.7 percent and 29.1 percent respectively, so that when red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene are not in the control range of the invention, the LOI values are reduced by 14.2 percent, 10.3 percent and 12.1 percent respectively compared with the LOI values of example 3, and meanwhile, the LOI values of examples 1 to 2 and 4 to 6 are not as same as the LOI values of red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene in the mass ratio range of the invention, therefore, the invention can achieve better flame retardant effect and realize obviously improved flame retardant property of powder coating through selectively optimizing and controlling the mass ratio of red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (6)
1. The powder coating containing the modified red mud is characterized by being prepared from the following raw materials in parts by weight: 120-200 parts of saturated polyester resin, 8-12 parts of hydroxyalkylamide, 30-50 parts of mica powder, 50-80 parts of titanium dioxide, 12-20 parts of pigment, 1.5-2 parts of flatting agent, 1-1.5 parts of degasifying agent, 1-2 parts of polishing agent, 1.2-2 parts of coupling agent and 80-100 parts of modified red mud;
the modified red mud is prepared from the following raw materials: red mud, microencapsulated red phosphorus and grafted maleic anhydride polyethylene, wherein the mass ratio is 10-30:2-6:1-5;
the preparation method of the modified red mud comprises the following steps:
s1: screening the red mud, then cleaning with deionized water, drying, grinding and sieving for standby;
s2: adding the red mud treated in the step S1 into microencapsulated red phosphorus and grafted maleic anhydride polyethylene, and mixing and stirring for 1-2h;
s3: drying, grinding and sieving the product obtained in the step S2 to obtain modified red mud;
in the step S1, the drying temperature is 80-100 ℃ and the drying time is 8-12h;
in the step S3, the drying temperature is 60-80 ℃ and the drying time is 8-12h.
2. The powder coating comprising modified red mud according to claim 1, characterized in that: the mass ratio of the red mud to the microencapsulated red phosphorus to the grafted maleic anhydride polyethylene is 12-25:2-4:1-3.
3. The powder coating comprising modified red mud according to claim 1, characterized in that: the pigment is an organic pigment.
4. The powder coating comprising modified red mud according to claim 1, characterized in that: the leveling agent is polyacrylate leveling agent.
5. The powder coating comprising modified red mud according to claim 1, characterized in that: the degasifying agent is benzoin.
6. The powder coating comprising modified red mud according to claim 1, characterized in that: the coupling agent is titanate coupling agent.
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| 吴红应等.赤泥及其复配体系阻燃聚乙烯的研究.《安全与环境学报》.2010,第10卷(第2期),第144-146页. * |
| 赤泥及其复配体系阻燃聚乙烯的研究;吴红应等;《安全与环境学报》;第10卷(第2期);第144-146页 * |
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