Hexafluoroisobutene (HFIB), 2-trifluoromethyl-3,3,3-trifluoropropene, CAS No. 382-10-5. Hexafluoroisobutene (HFIB) has a molecular weight of 164.05 g/mol, a boiling point of 14.5°C, a freezing point of -111°C, a solubility of 0.286 g/L in water, and is non-flammable. Hexafluoroisobutene (HFIB) is a colorless liquefied compressed gas used as a monomer for fluoropolymers and other special fluorides. In addition, hexafluoroisobutene is also used to prepare piezoelectric materials, lubricating materials, special elastomers, fluorine coatings, semiconductor lithography materials, refrigerants, blowing agents, pharmaceutical intermediates, etc. Hexafluoroisobutene has the following specific applications, firstly, it can be copolymerized with monomers of fluoropolymers and other special fluorides, which can be used as.
(1) piezoelectric materials
Hexafluoroisobutene (HFIB) and vinylidene fluoride (VDF) copolymerization, you can synthesize a regular arrangement of alternating copolymers, but also can be synthesized with a small amount of HFIB modified PVDF, both polymers have more excellent thermal, chemical and mechanical properties than ordinary PVDF.
(2) Lubricating materials
The copolymer of hexafluoroisobutylene (HFIB) and vinylidene fluoride (VDF) can be used as the thickener of high performance fluorinated lubricating oil; the lubricating grease thickened in this way is not easy to lose, thus producing less pollution, and is especially suitable for use in microelectronic devices; in addition, such lubricating grease has long lubricating life, good water resistance, and also has low torque and good lubricating effect in the case of high speed, so it is especially suitable for It is especially suitable for lubrication of computer hard disk and lubrication of automobile engine.
(3) Special Elastomer
Hexafluoroisobutene (HFIB) has a more branched structure than hexafluoropropylene (HFP), so the synthesized polymer has a lower surface tension. HFIB/HFP type fluoroelastomers are suitable for gaskets, pipe seals and other products that require high elasticity and chemical resistance. Blending HFIB /HFP copolymer latex with PTFE latex results in a polymer blend with high hardness without sacrificing elasticity and other mechanical properties as well as heat and chemical resistance. Such elastomers with high hardness and hydrocarbon resistance are particularly suitable for sealing of oil recovery machinery.
(4) Fluorine coatings
Hexafluoroisobutene (HFIB) can be copolymerized with vinyl acetate and other monomers to synthesize polymers that are easily soluble in general organic solvents, and these polymers are suitable for formulating fluorine coatings, which have better film-forming properties than general fluorine-containing resins, as well as good heat and chemical resistance and low surface tension.
In addition, hexafluoroisobutene (HFIB) can also be used as a semiconductor lithography material. Hexafluoroisobutene (HFIB) can be used as a raw material for a new generation of photoresist materials. HFIB-based fluorinated alcohols can be used to produce lithography materials with light transmission from 193 to 157 nm; this is a lithography material with good light transmission at low wavelengths for the next generation of high-density semiconductor lithography. Hexafluoroisobutene (HFIB) can also be used as an electron etching gas for plasma etching of trench holes, gate trenches, step contacts, capacitor holes, contact holes, etc. in silicon containing substrates. It can improve the selectivity between silicon containing substrate and mask material, reduce the damage in the channel area, form vertical profiles, and reduce the bending of high depth to width ratio structures.
Hexafluoroisobutene (HFIB) can be used as a polymer monomer and semiconductor lithography material, but also as a refrigerant, blowing agent, and pharmaceutical intermediate. As a refrigerant, HFIB is a non-ozone-depleting compound with properties similar to CFC-11; as a blowing agent, HFIB is non-flammable, has a suitable boiling point, low thermal conductivity in the gas phase, and is safe and reliable. As a pharmaceutical intermediate, the reaction of hexafluoroisobutene (HFIB) and benzene can produce 3,3,3-trifluoro-2-trifluoromethylpropylbenzene, which is a pharmaceutical intermediate used in the manufacture of anti-inflammatory drugs.