1823-59-2 Usage
Description
Bis-(3-phthalyl anhydride) ether, also known as 4,4'-oxydiphthalic anhydride (ODPA), is a solid compound with a melting point in the range of 225-229 °C. It was first introduced in the mid-1980s and is characterized by its off-white to white powder appearance. ODPA offers a greater degree of flexibility compared to other commercial dianhydrides and is less reactive than bismaleimide (BTDA). It is primarily used in the production of polyimide materials and, to a lesser extent, in epoxies.
Uses
Used in Polyimide Industry:
Bis-(3-phthalyl anhydride) ether is used as a key component in the production of polyimide materials. Its application is due to its ability to impart special performance properties to the materials, making them suitable for various high-end applications.
Used in Flexible Copper Clad Laminates (FCCFL) Production:
Bis-(3-phthalyl anhydride) ether is used as a precursor in the production of flexible copper clad laminates (FCCFL) for high-end personal electronic devices. The use of ODPA in this application is attributed to its flexibility and performance-enhancing properties, which contribute to the overall quality and reliability of the electronic devices.
Preparation
The preparation of 4,4'-Oxydiphthalic anhydride is as follows:Chlorophthalic anhydride (30g, 160mmol), tetraphenyl phosphonium bromide (0.3g, 0.7mmol), and 2,5-dichlorobenzoic acid (0.08g, 0.4mmol) were heated to approximately 220℃. Potassium carbonate (7.95g, 58mmol) was added over 45 minutes. The reaction was sampled after addition of the potassium carbonate and showed a 24.9% conversion to 4,4'-oxydiphthalic anhydride. The reaction was heated for an additional 45 minutes. The reaction mixture was diluted with 1,2,4-trichlorobenzene (90g) and filtered. The 4,4'-oxydiphthalic anhydride was allowed to crystallize and was collected, washed with 1,2,4-trichlorobenzene followed by hexane, and dried in an air circulating oven at 120℃. to give crude 4,4'-oxydiphthalic anhydride, 12.9g.
Flammability and Explosibility
Notclassified
Check Digit Verification of cas no
The CAS Registry Mumber 1823-59-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,2 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1823-59:
(6*1)+(5*8)+(4*2)+(3*3)+(2*5)+(1*9)=82
82 % 10 = 2
So 1823-59-2 is a valid CAS Registry Number.
InChI:InChI=1/C16H6O7/c17-13-9-3-1-7(5-11(9)15(19)22-13)21-8-2-4-10-12(6-8)16(20)23-14(10)18/h1-6H
1823-59-2Relevant articles and documents
Preparation method of 4, 4'-diphenyl ether tetracarboxylic dianhydride
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Paragraph 0027-0035, (2021/05/29)
The invention provides a preparation method of 4, 4'-diphenyl ether tetracarboxylic dianhydride, which comprises the following steps: S1, dissolving 4-nitrophthalic acid in a solvent, and heating for dehydration; S2, adding a molybdenum salt catalyst, a halogen promoter and carbonate into the reaction liquid obtained in S1, and carrying out etherification coupling reaction to obtain a 4, 4'-diphenyl ether tetracarboxylic acid crude product; S3, refining and dehydrating the crude product obtained in S3 to obtain 4, 4'-diphenyl ether tetracarboxylic dianhydride; wherein the weight ratio of the 4-nitrophthalic acid to the solvent to the molybdenum salt to the halogen is 1: (2-3.5): (0.02-0.05): (0.1-0.3); and the molar ratio of the 4-nitrophthalic acid to the carbonate is 1: (0.55-0.75). The molybdenum powder serves as the catalyst, the halogen serves as the cocatalyst, the conversion rate of the 4-nitrophthalic acid is larger than 99%, the molar yield of the 4, 4'-diphenyl ether tetracarboxylic acid crude product is larger than 85%, the method is unique, the technological process is simple, operation is easy, the yield is high, the cost is low, and the production efficiency and economic benefits are high.
Preparation method of 3, 3 ', 4, 4'-diphenyl ether tetracarboxylic acid dianhydride
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Paragraph 0037-0049, (2020/07/12)
The invention discloses a preparation method of 3, 3 ', 4, 4'-diphenyl ether tetracarboxylic acid dianhydride, which comprises the following steps: in the presence of a basic catalyst and a phase transfer catalyst, carrying out self-condensation reaction
Preparation method for diphenyl ether tetracarboxylic acid dianhydride
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Paragraph 0009-0010; 0011-0012; 0013-0014; 0015-0016, (2018/07/30)
The invention relates to a preparation method for 3,3',4,4'-diphenyl ether tetracarboxylic acid dianhydride. The method comprises the following steps: reacting 4-chlorophthalic anhydride with potassium carbonate for 4-5h at the temperature of 162-170 DEG