摘要:
Radical polymerization process for the preparation of halogenated polymers employing one or more ethylenically unsaturated monomers, at least one of which is chosen from halogenated monomers, molecular iodine and one or more radical-generating agents chosen from diazo compounds, peroxides and dialkyl diphenylalkanes Radical polymerization process for the preparation, starting from the halogenated polymers prepared by the process as described above, of block copolymers, at least one block of which is a halogenated polymer block. Halogenated polymers which have a number-average molecular mass Mn of greater than 1.0×104 and an Mz/Mw ratio of less than 1.65. Block copolymers, at least one block of which is a block of halogenated polymer identical to the halogenated polymers described above. Block copolymers comprising at least one halogenated polymer block which have a number-average molecular mass Mn of greater than 1.5×104 and a polydispersity index Mw/Mn of less than 1.60.
摘要翻译:用于制备卤化聚合物的自由基聚合方法,其使用一种或多种烯键式不饱和单体,其中至少一种选自卤代单体,分子碘和一种或多种选自重氮化合物,过氧化物和二烷基二烷基烷烃的自由基产生剂。自由基聚合方法 用于制备,从由上述方法制备的卤化聚合物开始的嵌段共聚物,其至少一个嵌段是卤代聚合物嵌段。 具有大于1.0×104的数均分子量M N n N以及小于1.65的M z z / M x W比的卤化聚合物 。 嵌段共聚物,其至少一个嵌段是与上述卤化聚合物相同的卤代聚合物嵌段。 包含数均分子量大于1.5×10 4的至少一种卤代聚合物嵌段的嵌段共聚物和多分散性指数M u> SUB> / M 小于1.60。
摘要:
The present invention describes synthesis of new fluorinated elastomers presenting very low glass transition temperatures, a good resistance to bases, petroleum and fuels and good properties for forming. These elastomers contain, by way of example, from 90 to 50 mole % of vinylidene fluoride (VDF) and from 10 to 50 molar % of perfluoromethyl vinyl ether (PMVE). In this precise case, they are prepared by radical copolymerisation of VDF and with PMVE in presence of various organic initiators such as for example the peroxides, the peresters or the diazo compounds.
摘要:
Radical polymerization process for the preparation of halogenated polymers employing one or more ethylenically unsaturated monomers, at least one of which is chosen from halogenated monomers, molecular iodine and one or more radical-generating agents chosen from diazo compounds, peroxides and dialkyldiphenylalkanes. Radical polymerization process for the preparation, starting from the halogenated polymers prepared by the process as described above, of block copolymers, at least one block of which is a halogenated polymer block. Halogenated polymers which have a number-average molecular mass Mn of greater than 1.0×104 and an Mz/Mw, ratio of less than 1.65. Block copolymers, at least one block of which is a block of halogenated polymer identical to the halogenated polymers described above. Block copolymers comprising at least one halogenated polymer block which have a number-average molecular mass Mn of greater than 1.5×104 and a polydispersity index Mw/Mn, of less than 1.60.
摘要翻译:使用一种或多种烯属不饱和单体制备卤化聚合物的自由基聚合方法,其中至少一种选自卤化单体,分子碘和一种或多种选自重氮化合物,过氧化物和二烷基二苯基烷烃的自由基产生剂。 用于制备的自由基聚合方法,从由上述方法制备的卤化聚合物开始的嵌段共聚物,其至少一个嵌段是卤化聚合物嵌段。 具有大于1.0×10 4的数均分子量M n N以及M z z / M z的卤化聚合物, / SUB>,比值小于1.65。 嵌段共聚物,其至少一个嵌段是与上述卤化聚合物相同的卤代聚合物嵌段。 包含数均分子量大于1.5×10 4的至少一种卤代聚合物嵌段的嵌段共聚物和多分散性指数M u> 小于或等于1.60。
摘要:
The present invention relates to a grafted copolymer bearing grafts of formula (I): —O—PM1—(PM2)—T (I) in which: PM1 represents a polymer block obtained by (co)polymerization of at least one monomer M1 via a radical route; and PM2, which is optionally present, represents a polymer block obtained by (co)polymerization of at least one monomer M2 via a radical route; and T represents the residue of a stable radical T•.
摘要:
This photopolymerizable composition includes an grafted reactive telomer containing trifluoroethyl methacrylate units, a reactive diluent and a photopolymerization initiator. It gives hydrophobic transparent coatings.
摘要:
Oligomers with polydiene sequences and crosslinkable grafts are useful as coatings for protecting metal surfaces as well as inking buffers. The oligomers contain a polydiene sequence of 1-100 diene links, from 1 to 20 polar functional groups, and from 1-20 acrylic or methacrylic groups. The oligomers have the general formula: ##STR1##
摘要:
This invention relates to an improved method of preparing the active telogen CF.sub.3 CFClI. The process comprises reacting chlorotrifluoroethylene, iodine, and iodine pentafluoride in the presence of an aluminum bromide catalyst at a temperature above about 25.degree. C.
摘要:
According to the invention, the reactive lubricating product of carbon fibres for embedding in a resin which can be hardened by X or beta radiation according to a radical mechanism is constituted by a monomer having at least one functional group (F.sub.1) able to form a covalent chemical bond with the hydroxyl sites of the carbon fibres and an ethylene unsaturation (F.sub.2) able to crosslink with the resin during its hardening under irradiation.
摘要:
Novel perchlorofluorinated hydrocarbons of the general formula:Cl-(CFX-CF.sub.2).sub.m -CCl.sub.2 -(CF.sub.2 -CFY).sub.n -Clwherein X and Y represent chlorine or fluorine atoms, and m and n are integers from 1 to 5, together with a process for preparing such perchlorofluorocarbons by reacting chlorotrifluoroethylene or tetrafluoroethylene with carbon tetrachloride or a telomer having the formula Cl.sub.3 C-(CF.sub.2 -CFX).sub.m -Cl in a polar solvent at a temperature of at least 120.degree. C. in the presence of copper or a copper salt.