CN115044231A - Heat-resistant iron oxide yellow pigment with multilayer coating structure and preparation method thereof - Google Patents
Heat-resistant iron oxide yellow pigment with multilayer coating structure and preparation method thereof Download PDFInfo
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- CN115044231A CN115044231A CN202210701105.4A CN202210701105A CN115044231A CN 115044231 A CN115044231 A CN 115044231A CN 202210701105 A CN202210701105 A CN 202210701105A CN 115044231 A CN115044231 A CN 115044231A
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- Prior art keywords
- iron oxide
- yellow pigment
- oxide yellow
- heat
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000001052 yellow pigment Substances 0.000 title claims abstract description 50
- 238000000576 coating method Methods 0.000 title claims abstract description 30
- 239000011248 coating agent Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 49
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000000243 solution Substances 0.000 claims description 32
- 229910052742 iron Inorganic materials 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 22
- 239000012153 distilled water Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 241001460678 Napo <wasp> Species 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 7
- 239000004033 plastic Substances 0.000 abstract description 6
- 229920003023 plastic Polymers 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 4
- 239000000049 pigment Substances 0.000 abstract description 4
- 239000003086 colorant Substances 0.000 abstract description 3
- 229960004887 ferric hydroxide Drugs 0.000 abstract description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000005955 Ferric phosphate Substances 0.000 abstract description 2
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 abstract description 2
- 235000019700 dicalcium phosphate Nutrition 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229940032958 ferric phosphate Drugs 0.000 abstract description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 abstract description 2
- 229910000399 iron(III) phosphate Inorganic materials 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000001308 synthesis method Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 10
- 239000001506 calcium phosphate Substances 0.000 description 3
- 229910000389 calcium phosphate Inorganic materials 0.000 description 3
- 235000011010 calcium phosphates Nutrition 0.000 description 3
- 239000011541 reaction mixture Substances 0.000 description 3
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 3
- 229910002588 FeOOH Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/22—Compounds of iron
- C09C1/24—Oxides of iron
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
Abstract
The invention relates to a heat-resistant iron oxide yellow pigment with a multilayer coating structure and a preparation method thereof. The first layer wraps ferric hydroxide to offset the reduction of the value L of the heated iron oxide yellow, the second layer wraps ferric phosphate to make up the loss of the value b of the heated iron oxide yellow, and the third layer wraps calcium hydrogen phosphate to lock the crystal water of the iron oxide yellow pigment, so that the trend of the color change of the heated iron oxide yellow pigment is ensured. The pigment product prepared by the method has the heat resistance of 270 ℃, has the advantages of good heat resistance, simple synthesis method, low cost, safety, environmental protection and the like, and can be used as a colorant when being used for plastic processing and powder coating.
Description
Technical Field
The invention relates to a heat-resistant iron oxide yellow pigment with a multilayer coating structure and a preparation method thereof.
Background
After 20 th century, the iron oxide industry in China enters a stage of excess capacity and mutual competition of enterprises, the excess capacity is a great problem facing the whole iron oxide industry and the manufacturing industry in China, the iron oxide industry in China is also rough in development at present, and products and processes lack technical innovation. It is imperative to change resource advantages to economic and technical benefits.
The iron oxide yellow is called as iron yellow for short, is hydrous ferric oxide, and has a molecular formula of FeOOH. Iron oxide yellow is a lemon yellow to brown powder, and its crystal structure and physical properties vary greatly depending on the production method and operating conditions. The iron oxide yellow can gradually remove crystal water at the temperature of more than 177 ℃ to become iron oxide red. Because of the poor thermal stability of iron oxide yellow, there are major limitations in plastics processing and powder coating color applications. Therefore, the development of iron oxide yellow pigments with heat-resistant effect has high practical application value for plastic processing and powder coating industries.
The precursor iron yellow has poor heat resistance, and the change trend of the Lab value after heating is as follows: the values of L and b decrease and the value of a increases. At present, the heat resistance of the iron oxide yellow pigment is improved mainly by wrapping the iron oxide yellow pigment tightly in the literature at home and abroad. For example, the invention patent (ZL201710310972.4) discloses a preparation method of a heat-resistant easy-to-disperse iron oxide yellow pigment coated by calcium phosphate, and the prepared coated iron oxide yellow pigment has the heat resistance of 260 ℃. After the calcium phosphate coated iron yellow pigment is heated, the change trend of the Lab value of the coated iron yellow pigment product is not changed due to the coating of the calcium phosphate.
The invention adopts the principle of pigment heating color complementing, and improves the heat resistance of the iron oxide yellow pigment by coating a plurality of layers of inorganic matters on the outer surface of the iron oxide yellow pigment. The first layer wraps ferric hydroxide to offset the reduction of the value L of the heated iron oxide yellow, the second layer wraps ferric phosphate to make up the loss of the value b of the heated iron oxide yellow, and the third layer wraps calcium hydrogen phosphate to lock the crystal water of the iron oxide yellow pigment, so that the trend of the color change of the heated iron oxide yellow pigment is ensured. The heat resistance of the pigment product prepared by the method reaches 270 ℃, and the heat resistance requirement of the pigment product on a coloring agent during plastic processing and powder coating application is met.
Disclosure of Invention
In order to overcome the problem of insufficient heat resistance of the iron oxide yellow in plastic processing and powder coating application, the heat resistance of the iron oxide yellow pigment is improved by wrapping a plurality of layers of inorganic matters on the outer surface of the iron oxide yellow pigment.
The structural design of the yellow-filling coating system of the iron oxide yellow pigment is as follows: FeOOH @ Fe (OH) 3 @FePO 4 ·2H 2 O@CaHPO 4 . The coating reaction equation of the three-layer coated iron yellow pigment is as follows:
(1) coating with ferric hydroxide: fe (OH) 3 (lowering L value)
FeSO 4 +2NaOH+1/4O 2 +1/2H 2 O＝Fe(OH) 3 +Na 2 SO 4
(2) And (3) oxidation precipitation coating: FePO 4 ·2H 2 O (yellow supplement by heat)
FeSO 4 +Na 2 HPO 4 +1/4O 2 +3/2H 2 O＝FePO 4 ·2H 2 O+Na 2 SO 4
(3) Slow release precipitation coating: CaHPO 4 (inhibition of dehydration)
CaCl 2 +NaPO 3 +NaOH＝CaHPO 4 +2NaCl
The preparation method comprises the following steps:
a heat-resistant iron oxide yellow pigment with a multilayer coating structure is characterized in that: the outer layer of the iron yellow pigment is sequentially coated with Fe (OH) 3 、FePO 4 ·2H 2 O and CaHPO 4 The coating amount of the three substances is respectively 3-5%, 3-8% and 20-30% of the mass of the iron oxide yellow. The preparation method of the heat-resistant iron oxide yellow pigment with the multilayer coating structure comprises the following steps: (1) putting 10g of iron oxide yellow into a 1000mL beaker, adding 150mL of distilled water, stirring and dispersing for 10min, and transferring the beaker into a 80 ℃ water bath kettle after dispersing; (2) weighing 0.78-1.30 g of FeSO 4 ·7H 2 Adding the prepared solution of O into the iron oxide yellow reaction solution, then dropwise adding a sodium hydroxide solution, slowly adjusting the pH value of the solution to 10, and then continuously stirring and aging for 20 min; (3) adding 0.58-1.18 g of FeSO into the reaction solution at the same time 4 ·7H 2 An aqueous solution prepared from O and 0.23-0.61 g of Na 2 HPO 4 After the prepared aqueous solution is added, continuously stirring for 3.5h, and performing suction filtration, washing and drying to obtain the double-layer coated iron yellow pigment; (4) adding distilled water to the double-layer coated iron yellow pigment obtained in the previous step for dispersion; then weighing 1.63-2.46 g of CaCl 2 ，1.50～2.28g NaPO 3 And 0.59-0.90 g of NaOH, and respectively stirring with 50mL of distilled water until the NaOH and the distilled water are completely dissolved; when the water bath temperature is stabilized at 50 ℃, simultaneously dripping the prepared 3 solutions into the double-layer coated iron yellow pigment reaction solution for 0.5h, and continuously stirring for 5h after dripping; and carrying out suction filtration and washing on the product, drying for 12h at 80 ℃, and grinding to obtain the heat-resistant iron oxide yellow pigment with the multilayer coating structure.
The heat-resistant iron oxide yellow pigment with the multilayer coating structure synthesized by the invention has the advantages of good heat resistance, simple synthesis method, low cost, safety, environmental protection and the like, and has higher industrial application value.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1
Putting 10g of iron oxide yellow into a 1000mL beaker, adding 150mL of distilled water, stirring and dispersing for 10min, and transferring the beaker into a 80 ℃ water bath kettle after dispersing; 0.78g of FeSO was weighed 4 ·7H 2 Adding the prepared solution of O into the iron oxide yellow reaction solution, then dropwise adding a sodium hydroxide solution, slowly adjusting the pH value of the solution to 10, and then continuously stirring and aging for 20 min; 0.58g of FeSO was added simultaneously to the reaction mixture 4 ·7H 2 O and 0.23g of Na 2 HPO 4 After the prepared aqueous solution is added, continuously stirring for 3.5h, and performing suction filtration, washing and drying to obtain the double-layer coated iron yellow pigment; adding distilled water to the double-layer coated iron yellow pigment obtained in the previous step for dispersion; then 1.63g CaCl was weighed 2 ，1.50g NaPO 3 And 0.59g NaOH, respectively stirred with 50mL of distilled water until completely dissolved; when the water bath temperature is stabilized at 50 ℃, simultaneously dripping the prepared 3 solutions into the double-layer coated iron yellow pigment reaction solution for 0.5h, and continuously stirring for 5h after dripping; the product is filtered, washed, dried for 12 hours at 80 ℃ and porphyrized to obtain the multilayer coating structure heat-resistant oxygenIron oxide yellow pigment sample 1.
Example 2
Putting 10g of iron oxide yellow into a 1000mL beaker, adding 150mL of distilled water, stirring and dispersing for 10min, and transferring the beaker into a 80 ℃ water bath kettle after dispersing; 1.30g of FeSO are weighed 4 ·7H 2 Adding the prepared solution of O into the iron oxide yellow reaction solution, then dropwise adding a sodium hydroxide solution, slowly adjusting the pH value of the solution to 10, and then continuously stirring and aging for 20 min; 1.18g of FeSO was added to the reaction mixture simultaneously 4 ·7H 2 O and 0.61g of Na 2 HPO 4 After the prepared aqueous solution is added, continuously stirring for 3.5h, and performing suction filtration, washing and drying to obtain the double-layer coated iron yellow pigment; adding distilled water to the double-layer coated iron yellow pigment obtained in the previous step for dispersion; then 2.46g of CaCl were weighed 2 ，2.28g NaPO 3 And 0.90g NaOH, respectively stirred with 50mL of distilled water until completely dissolved; when the water bath temperature is stabilized at 50 ℃, simultaneously dripping the prepared 3 solutions into the double-layer coated iron yellow pigment reaction solution for 0.5h, and continuously stirring for 5h after dripping; and carrying out suction filtration and washing on the product, drying the product at 80 ℃ for 12h, and grinding the product to obtain a multilayer coating structure heat-resistant iron oxide yellow pigment sample 2.
Example 3
Putting 10g of iron oxide yellow into a 1000mL beaker, adding 150mL of distilled water, stirring and dispersing for 10min, and transferring the beaker into a 80 ℃ water bath kettle after dispersing; 0.78g of FeSO was weighed 4 ·7H 2 Adding the prepared solution of O into the iron oxide yellow reaction solution, then dropwise adding a sodium hydroxide solution, slowly adjusting the pH value of the solution to 10, and then continuing stirring and aging for 20 min; 0.74g of FeSO was added simultaneously to the reaction mixture 4 ·7H 2 O and 0.38g of Na 2 HPO 4 After the prepared aqueous solution is added, continuously stirring for 3.5h, and performing suction filtration, washing and drying to obtain the double-layer coated iron yellow pigment; adding distilled water to the double-layer coated iron yellow pigment obtained in the previous step for dispersion; then 1.63g CaCl was weighed 2 ，1.50g NaPO 3 And 0.59g NaOH, respectively stirred with 50mL of distilled water until completely dissolved; when the water bath temperature is stabilized at 50 ℃, dripping the prepared 3 solutions at the same timeAdding the mixture into a double-layer coated iron yellow pigment reaction solution, dropwise adding for 0.5h, and continuously stirring for 5h after dropwise adding; and carrying out suction filtration and washing on the product, drying for 12h at 80 ℃, and grinding to obtain a multilayer coating structure heat-resistant iron oxide yellow pigment sample 3.
The oven heat resistance test shows that the heat-resistant iron oxide yellow pigments with the multilayer coating structure, such as sample 1, sample 2 and sample 3, have color difference values delta E of 2.52, 2.74 and 2.23 respectively after being heat-resistant at 270 ℃ for 30min, and can be used as a coloring agent for processing plastics and powder coatings at 270 ℃.
Claims (2)
1. A heat-resistant iron oxide yellow pigment with a multilayer coating structure is characterized in that: the outer layer of the iron yellow pigment is sequentially coated with Fe (OH) 3 、FePO 4 ·2H 2 O and CaHPO 4 The coating amounts of the three substances are respectively 3-5%, 3-8% and 20-30% of the mass of the iron yellow pigment, and the heat resistance of the oven reaches 270 ℃.
2. The heat-resistant iron oxide yellow pigment with a multi-layer coating structure as described in claim 1, which is prepared by the following steps: (1) putting 10g of iron oxide yellow into a 1000mL beaker, adding 150mL of distilled water, stirring and dispersing for 10min, and transferring the beaker into a 80 ℃ water bath kettle after dispersion; (2) weighing 0.78-1.30 g of FeSO 4 ·7H 2 Adding the prepared solution of O into the iron oxide yellow reaction solution, then dropwise adding a sodium hydroxide solution, slowly adjusting the pH value of the solution to 10, and then continuing stirring and aging for 20 min; (3) adding 0.58-1.18 g of FeSO into the reaction solution at the same time 4 ·7H 2 An aqueous solution prepared from O and 0.23-0.61 g of Na 2 HPO 4 After the prepared aqueous solution is added, continuously stirring for 3.5h, and performing suction filtration, washing and drying to obtain the double-layer coated iron yellow pigment; (4) adding distilled water to the double-layer coated iron yellow pigment obtained in the previous step for dispersion; then weighing 1.63-2.46 g of CaCl 2 ，1.50～2.28g NaPO 3 And 0.59-0.90 g of NaOH, and respectively stirring with 50mL of distilled water until the NaOH and the distilled water are completely dissolved; when the water bath temperature is stabilized at 50 ℃, simultaneously dripping the prepared 3 solutions into the double-layer coated iron yellow pigment reaction solution for 0.5h, and continuously stirring for 5h after dripping; the product is filtered and washedAnd drying at 80 ℃ for 12h, and grinding to obtain the heat-resistant iron oxide yellow pigment with the multilayer coating structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701105.4A CN115044231A (en) | 2022-06-10 | 2022-06-10 | Heat-resistant iron oxide yellow pigment with multilayer coating structure and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701105.4A CN115044231A (en) | 2022-06-10 | 2022-06-10 | Heat-resistant iron oxide yellow pigment with multilayer coating structure and preparation method thereof |
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| CN115044231A true CN115044231A (en) | 2022-09-13 |
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| CN202210701105.4A Pending CN115044231A (en) | 2022-06-10 | 2022-06-10 | Heat-resistant iron oxide yellow pigment with multilayer coating structure and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053325A (en) * | 1976-09-14 | 1977-10-11 | Pfizer Inc. | Heat stable iron oxides |
| CN102040869A (en) * | 2010-11-26 | 2011-05-04 | 攀钢集团钢铁钒钛股份有限公司 | Preparation method of colorful titanium dioxide |
| CN105504883A (en) * | 2015-12-29 | 2016-04-20 | 中国科学院宁波材料技术与工程研究所 | Preparation method of high-temperature-resistant ferric oxide yellow pigment |
| CN107325588A (en) * | 2017-07-10 | 2017-11-07 | 林中 | A kind of preparation method for the pigment for coating high gorgeous degree iron oxide |
| CN114479515A (en) * | 2022-01-16 | 2022-05-13 | 湖州师范学院 | Method for optimizing heat resistance of coated iron oxide yellow pigment |
-
2022
- 2022-06-10 CN CN202210701105.4A patent/CN115044231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053325A (en) * | 1976-09-14 | 1977-10-11 | Pfizer Inc. | Heat stable iron oxides |
| CN102040869A (en) * | 2010-11-26 | 2011-05-04 | 攀钢集团钢铁钒钛股份有限公司 | Preparation method of colorful titanium dioxide |
| CN105504883A (en) * | 2015-12-29 | 2016-04-20 | 中国科学院宁波材料技术与工程研究所 | Preparation method of high-temperature-resistant ferric oxide yellow pigment |
| CN107325588A (en) * | 2017-07-10 | 2017-11-07 | 林中 | A kind of preparation method for the pigment for coating high gorgeous degree iron oxide |
| CN114479515A (en) * | 2022-01-16 | 2022-05-13 | 湖州师范学院 | Method for optimizing heat resistance of coated iron oxide yellow pigment |
Non-Patent Citations (1)
| Title |
|---|
| "《兽药手册 第2版》", 31 December 1997, 中国农业出版社 , pages: 597 - 598 * |
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