公开(公告)号：US20040054050A1

公开(公告)日：2004-03-18

申请号：US10382982

申请日：2003-03-07

Applicant: ATOFINA

Inventor： Thierry Pascal ,  Bruno Schlund

IPC: C08K005/09 ,  C08L027/12

CPC classification number: C08F14/08 ,  C08K5/11 ,  C08K5/435 ,  C08L27/16 ,  C08L2205/02 ,  C08L2666/04

Abstract: The present invention relates to a flexible and tough composition comprising: at least one vinylidene fluoride (VF2) homopolymer (A) or a copolymer (A) of VF2 and at least one other monomer copolymerizable with VF2, in which the said monomer is present in an amount of between 0 and 30 parts by weight per 100 parts by weight of VF2, at least one fluoroelastomer B, optionally a plasticizer C, in which, on the one hand, the said composition comprises from 0.5 to 10 parts by weight of B and from 0 to 10 parts by weight of C per 100 parts by weight of A, with the additional condition that the sum of B and C is from 0.5 to 10.5 parts by weight and, on the other hand, the vinylidene fluoride homopolymer or copolymer (A) is chosen in such a way that it has a melt flow index, measured according to the ISO 1133 standard at 230null C. under a load of 5 kg, of less than 5 g/10 min and a critical modulus GC, at the intersection of the melt shear moduli Gnull and Gnull measured at 190null C., of between 5 and 22 kPa. This composition is especially used for the manufacture of pipes for conveying hydrocarbons extracted from off-shore or on-shore oil deposits.

Abstract translation: 本发明涉及一种柔性和韧性组合物，其包含：至少一种偏氟乙烯（VF2）均聚物（A）或VF2的共聚物（A）和至少一种可与VF2共聚的其它单体，其中所述单体存在于 相对于每100重量份VF2为0至30重量份的量，至少一种含氟弹性体B，任选的增塑剂C，其中所述组合物一方面包含0.5至10重量份的B 和相对于每100重量份的A为0至10重量份的C，另外条件是B和C的总和为0.5至10.5重量份，另一方面，偏二氟乙烯均聚物或共聚物 （A）的选择使得其具有根据ISO 1133标准在230℃，5kg负荷下小于5g / 10min测量的熔体流动指数和临界模量GC， 在190℃下测量的熔体剪切模量G'和G“的交点处在5μA之间 d 22 kPa。 该组合物特别用于制造用于输送从离岸或岸上油沉积物中提取的烃的管道。

公开(公告)号：US20030225208A1

公开(公告)日：2003-12-04

申请号：US10195329

申请日：2002-07-16

Applicant: ATOFINA

Inventor： Thierry Pascal

IPC: C08F114/18 ,  C08L053/00 ,  C08F014/18 ,  C08F012/20 ,  C08F214/18

CPC classification number: C08L27/16 ,  C08L53/02 ,  C08L55/005 ,  C08L2666/24

Abstract: The invention is a PVDF (polyvinylidene fluoride) homopolymer or copolymer, the comonomer being chosen from compounds containing a vinyl group capable of being opened by the action of free radicals in order to be polymerized and which contains, directly attached to this vinyl group, at least one fluorine atom, a fluoroalkyl group or a fluoroalkoxy group such that: it comprises a fraction of non-transferred chains of very high molar mass which are completely insoluble in the usual solvents for PVDF, such as DMF (dimethylformamide), DMSO (dimethyl sulphoxide) and NMP (N-methylpyrrolidone), the polymer fraction associated with these high-mass chains having a dynamic viscosity of greater than 50 kpoise at 230null C. and at a shear rate of 100 snull1, the size of the spherulites is between 0.5 and 4 nullm. The invention also relates to blends of this PVDF with an ABC triblock copolymer, the three blocks A, B and C being linked together in this order, each block being either a homopolymer or a copolymer obtained from two or more monomers, the A block being linked to the B block and the B block to the C block by means of a covalent bond or of an intermediate molecule linked to one of these blocks via a covalent bond and to the other block via another covalent bond, and such that: the A block is compatible with PVDF, the B block is incompatible with PVDF and is incompatible with the A block, the C block is incompatible with PVDF, the A block and the B block. The invention also relates to the parts made of the above composition. These parts may be sheets, films, tubes, rods, centrifugal pump components and containers. The invention also relates to a process for synthesizing this PVDF, in which: a dispersion of VF2 (vinylidene fluoride) and of one or more optional comonomers in water is made, possibly with the aid of a surfactant, the said dispersion being initially brought into contact with a water-soluble non-organic initiator capable of causing the polymerization of the monomers; then, part of the PVDF having been formed in the presence of the water-soluble non-organic initiator, the following are added: either (i) a chain transfer agent capable of propagating the polymerization, the said polymerization then being initiated by a water-soluble non-organic initiator or by an organic initiator, or (ii) an organic initiator, also capable of accomplishing chain transfer, and optionally a water-soluble non-organic initiator.