公开(公告)号：US3557058A

公开(公告)日：1971-01-19

申请号：US3557058D

申请日：1968-04-16

Applicant: MONTEDISON SPA

Inventor： FIORE LEONARDO ,  NISSIM GIORGIO ,  CRESPI ELIO

IPC: C08G2/00 ,  C08G2/04 ,  C08G1/04 ,  C08G1/22

CPC classification number: C08G2/06 ,  C08G2/04 ,  C08G2/10

Abstract: MODIFIED OXYMETHYLENE HOMOPOLYMERS AND COPOLYMERS HAVING PARTICULAR TERMINAL GROUPS AND CHARACTERIZED BY CONTROLLED MOLECULAR WEIGHT AND INCREASED THERMAL STABILITY ARE OBTAINED BY POLYMERIZING TRIOXANE OR MIXTURES THEREOF WITH OTHER MONOMERS IN THE PRESENCE OF PARTICULAR CHAIN-TRANSFER AGENTS.

公开(公告)号：US3016371A

公开(公告)日：1962-01-09

申请号：US79473059

申请日：1959-02-20

Applicant: MONTEDISON SPA

Inventor： NATTA GIULIO ,  PORRI LIDO ,  FIORE LEONARDO

IPC: C08F4/12 ,  C08F4/26 ,  C08F136/04 ,  C08K5/37

CPC classification number: C08F136/04 ,  C08F4/12 ,  C08K5/37 ,  C08F4/7096 ,  C08L9/00

Abstract: A catalyst which is stereospecific in respect of polymerizing butadiene to the cis-1:4-structure comprises a hydrocarbon soluble cobalt dinitrosyl halide (excluding the fluoride) and a Group II or III organometallic compound (e.g. of Al, Be, Zn, Ng or Ca, such as Al dialkyl monochloride, specifically AlEt2Cl) in a hydrocarbon solvent which may be aliphatic (e.g. propane, butane or n-heptane) or aromatic (e.g. benzene) or monomeric butadiene. Preferably the concentration of Co compound does not exceed 0,2 millimols per litre of solvent. Specifications 833,831 and 873,046 are referred to.

Abstract translation: 关于将丁二烯聚合成顺式-1,4-结构的立体定向催化剂包括烃溶性二钴二卤化二卤化物（不包括氟化物）和II或III族有机金属化合物（例如Al，Be，Zn，Ng或 （例如丙烷，丁烷或正庚烷）或芳族（例如苯）或单体丁二烯的烃溶剂中的Ca，如Al二烷基一氯化物，特别是AlEt 2 Cl）。 优选地，Co化合物的浓度不超过0.2毫摩尔/升溶剂。 参考规格833,831和873,046。