摘要:
The invention provides a process for producing a fluorine-containing compound from an inexpensive material.Namely, Compound I such as RACH2OH is reacted with Compound II such as XCORB to form Compound III such as RACH2OCORB, followed by fluorination in a liquid phase to form Compound IV such as RAFCF2OCORBF, which is converted to Compound V such as RAFCOF and/or Compound VI such as RBFCOF. RA is an alkyl group or the like, RB is a perhalogenoalkyl group or the like, RAF and RBF are fluorinated RA and RB, and X is halogen.
摘要翻译:本发明提供从廉价材料制备含氟化合物的方法。 也就是说,将化合物I如R“CH 2 OH与化合物II如XCOR B”反应形成化合物III,例如R SUP 然后在液相中氟化以形成化合物IV,例如R AF AF< SUB>< 将其转化为化合物V,例如R AFFFF和/或化合物VI如R BF BF, 中粮 R A是烷基等,R B是全卤代烷基等,R AF和R BF, R 2是氟化的R A和R B,并且X是卤素。
摘要:
A plastic optical fiber low in attenuation in a high order mode and small in mode dispersion, is presented. The plastic optical fiber comprises at least a core and a clad surrounding the core, characterized in that the core has a refractive index which gradually decreases from the core center towards the outside in the radial direction of the plastic optical fiber, and the refractive index of the clad is lower than the refractive index of the core center and higher than the refractive index of the core periphery.
摘要:
The present invention provides a method for preparing a compound of CF3CF2CF2OCF═CF2 by pyrolyzing a compound expressed by CF3CF2CF2OCF(CF3)COOCF2CF(CF3)OCF2CF2CF3 in a gas phase at a temperature of from 200° C. to 500° C.
摘要:
A polymer which contains monomer units formed by polymerization of a fluorine-containing diene of formula 1: CF2═CF(CF2)nCXYOCF═CF2 Wherein X and Y are hydrogen and chlorine, hydrogen and-bromine, hydrogen and iodine, fluorine and chlorine, fluorine and bromine, fluorine and iodine, chlorine and bromine, chlorine and iodine, bromine and bromine, bromine and iodine, or iodine and iodine and n is an integer from 1 to 3.
摘要:
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which has substantially no C--H bond and at least one material (b) which has substantially no C--H bond and differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction, and the optical plastic material has a glass transition temperature which is substantially uniform throughout it.
摘要:
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which substantially has no C-H bond and at least one material (b) which differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction.
摘要:
The invention provides a process for producing a fluorine-containing compound from an inexpensive material.Namely, Compound I such as RACH2OH is reacted with Compound II such as XCORB to form Compound III such as RACH2OCORB, followed by fluorination in a liquid phase to form Compound IV such as RAFCF2OCORBF, which is converted to Compound V such as RAFCOF and/or Compound VI such as RBFCOF. RA is an alkyl group or the like, RB is a perhalogenoalkyl group or the like, RAF and RBF are fluorinated RA and RB, and X is halogen.
摘要翻译:本发明提供从廉价材料制备含氟化合物的方法。 也就是说,将化合物I如R“CH 2 OH与化合物II如XCOR B”反应形成化合物III,例如R SUP 然后在液相中氟化以形成化合物IV,例如R AF AF< SUB>< 将其转化为化合物V,例如R AFFFF和/或化合物VI如R BF BF, 中粮 R A是烷基等,R B是全卤代烷基等,R AF和R BF, R 2是氟化的R A和R B,并且X是卤素。
摘要:
A plastic optical fiber low in attenuation in a high order mode and small in mode dispersion, is presented. The plastic optical fiber comprises at least a core and a clad surrounding the core, characterized in that the core has a refractive index which gradually decreases from the core center towards the outside in the radial direction of the plastic optical fiber, and the refractive index of the clad is lower than the refractive index of the core center and higher than the refractive index of the core periphery.
摘要:
A process for producing a fluorinated ester through a small number of steps, is presented. The process for producing a fluorinated ester, comprises a transesterification step in which RAF—COOCF2—RAF and RA—CH2OH are subjected to a transesterification reaction to obtain RAF—COOCH2—RA, and a fluorination step in which the obtained compound is fluorinated to obtain a reaction product containing RAF—COOCF2—RAF. Here, in the formulae, RA is a monovalent organic group, and RAF is the same group as RA or a monovalent organic group obtained by fluorination of RA.
摘要翻译:提出了通过少量步骤生产氟化酯的方法。 氟化酯的制备方法包括酯交换步骤,其中R AF -OCOCF 2 -R AF和R A A < / O 2 CH 2 OH进行酯交换反应,得到R AF-COOCH 2 -R A A / O >和氟化步骤,其中所得化合物被氟化以获得含有R AF -OCOCF 2 -R AF的反应产物。 这里,在式中,R A A为一价有机基团,R AF为与R A A或单价有机基团相同的基团 通过R A A的氟化获得。
摘要:
The invention provides a process for producing a fluorine-containing compound from an inexpensive material. Namely, Compound I such as RACH2OH is reacted with Compound II such as XCORB to form Compound III such as RACH2OCORB, followed by fluorination in a liquid phase to form Compound IV such as RAFCF2OCORBF, which is converted to Compound V such as RAFCOF and/or Compound VI such as RBFCOF. RA is an alkyl group or the like, RB is a perhalogenoalkyl group or the like, RAF and RBF are fluorinated RA and RB, and X is halogen.