High Purity 99.9% Diamine Monomer TFMB TFDB Use For Colorless Polyimide Film And Copolymers

TFMB 2,2′-Bis(Trifluoromethyl)Benzidine CAS 341-58-2 Purity Min 99.9% Polyimide Monomer

Specification of TFMB

Description of TFMB

2,2'-Bis(trifluoromethyl)benzidine (TFMB) is an organic compound with various notable properties. It is a solid crystalline substance with a white to off-white powder or crystal appearance. BTB has a high melting point and is sparingly soluble in water but readily dissolves in organic solvents. It exhibits good stability under normal conditions and can undergo different chemical reactions. The presence of trifluoromethyl groups in BTB influences its unique reactivity. It is utilized in the synthesis of high-performance resins, where it contributes to improved mechanical and dielectric properties. BTB also finds application in the adsorption of pollutants, particularly aflatoxins. However, it is important to note that BTB is highly toxic and potentially carcinogenic, requiring strict safety measures when handling. TFMB plays a crucial role in the development of colorless polyimide copolymers and poly(ester imide) copolymers, which have various applications in optical and optoelectronic fields and as dielectric substrate materials for high-frequency flexible printed circuit boards, respectively. The incorporation of 2,2'-Bis(trifluoromethyl)benzidine in these copolymers results in unique properties such as improved solubility, increased thermal expansion coefficients, high glass transition temperatures, and excellent dielectric properties. Overall, this new synthetic route offers a reliable and efficient method for the production of 2,2'-Bis(trifluoromethyl)benzidine, and these copolymers show great promise in advanced electronic applications requiring reliable performance under demanding conditions.

Application of TFMB

OLED/LCD materials,transparent polyimide material,5G resins, diamine monomer,Semiconductor applications

Optical field, Microelectronics field, Gas separation membrane field, FPI as a special engineering plastic can also be used in battery separator, composite materials and aerospace and other fields.
 

Advantages of TFMB

1.1 Low dielectric properties
The dielectric constant of the traditional fluorine-free Kapton film is as high as 3.9 at 1 kHz. fluorine element has a low electronic polarisation rate, and fluorine-containing groups such as -CF3 have a large free volume, which effectively reduces the stacking efficiency of the molecules, increases the intermolecular spacing, and thus weakens the intermolecular interaction force, and the introduction of fluorine-containing groups into PI can reduce the dielectric constant (FPI dielectric constant ≤ 3) of PI materials, and has good stability over a wide range of temperature and frequency. The introduction of fluorine-containing groups into PI can reduce the dielectric constant of PI materials (FPI dielectric constant ≤ 3), and has good stability in a wide range of temperature and frequency.

1.2 Highly transparent properties
Conventional aromatic PIs form charge transfer complexes (CTCs) due to inter- and intramolecular charge transfer complexation, and these complexes absorb light, resulting in PI films that appear yellow or brown. However, elemental fluorine, due to its strong electronegativity, can effectively cut off PI electron cloud conjugation and inhibit the formation of CTCs. As a result, the resulting FPIs are usually light-coloured or colourless and can maintain high transparency while maintaining high thermal stability.

1.3 Excellent gas separation performance
Due to the special characteristics of fluorine atoms in fluorine-containing PI, fluorine atoms between different molecular chain segments will be attracted to each other, resulting in the polymer chain intertwining and curling. This structural feature restricts the close stacking of molecular chains, thus increasing the free volume fraction (FFV). At the same time, the polymer molecular chains composed of fluorine atoms have a greater rigidity, which allows fluorinated PIs to enhance gas permeability while still maintaining good selectivity.

1.4 Easy solubility properties

Ordinary polyimide due to the close intermolecular stacking, making it difficult for polar solvents such as DMAC, DMF, etc. to enter the interior of its molecular chain, resulting in poor solubility or even insoluble. However, fluorine-containing polyimide through the introduction of fluorine-containing groups, increasing the spacing of the molecular chain, reducing the intermolecular forces, thus limiting the close stacking of the molecular chain. This makes it easier for solvent molecules to enter between the molecules and significantly improves the solubility of fluoropolyimide.

1.5 Low hygroscopicity properties
The low surface of the fluorine atom makes it strongly hydrophobic, which reduces the moisture absorption rate of the film.

1. Quick lead time

2. Low MOQ

3. Quality assured with COA

4. Full experience in shipping

5. Free consulting service

6. custom service welcome

FAQ

Q1: What is your regular lead time for sample and official order?

A1: Sample lead time 3-5 days. Official order lead time 7-14 days.

Q2: What is your MOQ?

A2: MOQ usually is 1kg.

Q3: How you control product quality?

A3: From raw material inspection, dupro inspection to final product inspection are executed strictly.

Q4: What is your warranty policy?

A4: We will send you a new batch if there is any quality issue during warranty time

Q5: Do you refund if customer receive defective product and do not accept replacement?

A5: Yes

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