MULTI-HEADED CHAIN SHUTTLING AGENTS AND THEIR USE FOR THE PREPARATION OF BLOCK COPOLYMERS
申请人:Dow Global Technologies Llc
公开号:EP3243846A2
公开(公告)日:2017-11-15
This disclosure relates to olefin polymerization catalysts and compositions, their manufacture, and the production of polyolefins using specific catalyst compositions, including the use of chain-shuttling agents in the olefin polymerization process. Specifically, this disclosure provides for dual-headed and multi-headed chain shuttling agents (CSAs or MSAs) and for their use in preparing blocky copolymers. By controlling the ratio of dual-headed and multi-headed CSA sites to mono-headed CSA sites, a blocky copolymer can be provided having properties such as a narrow molecular weight distribution and/or improved melt properties.
CHAIN SHUTTLING AGENTS AND THEIR USE FOR THE PREPARATION OF BLOCK COPOLYMERS
申请人:Dow Global Technologies Llc
公开号:EP3489264A1
公开(公告)日:2019-05-29
The present disclosure relates to olefin polymerization catalysts and compositions, their manufacture and the production of polyolefins using specific catalyst compositions, including the use of chain-shuttling agents in the olefin polymerization process. Specifically, the present disclosure provides for dual-headed and multi-headed chain shuttling agents and their use in preparing block copolymers. By controlling the ratio of dual-headed and multi-headed chain shuttling agent sites to mono-headed chain shuttling agent sites, a block copolymer can be provided having properties such as narrow molecular weight distribution and/or improved melt properties.
Processes for producing a fluorinated ether compound are provided by which fluorinated ether compound capable of imparting excellent water/oil repellency, to a substrate surface or a hard coat layer can be easily produced in high yield. A process comprising reacting Rf(CF2)a-CF2OC(=O)Rf4 or Rf(CF2)a-C(=O)X1 with HN(-R1CH=CH2)2 to obtain Rf(CF2)a-C(=)N(-R1CH2=CH2)2 and a process comprising obtaining the above product and reacting the product with OHSiR2nL3-n to obtain Rf(CF2)a-C(=O)N(-R1CH2CH2SiR2nL3-n)2 wherein Rf is a linear polyfluoroalkyl group having at least two carbon atoms and at least one etheric oxygen atom between carbon atoms, Rf4 is a C1-30 perfluoroalkyl group or the like, X1 is a halogen atom, R1 is an alkylene group, a is an integer of from 1 to 5, R2 is a monovalent hydrocarbon group, L is a hydrolyzable group, and n is an integer of from 0 to 2.
Processes for producing fluorinated ether compounds
申请人:AGC Inc.
公开号:US11066517B2
公开(公告)日:2021-07-20
Processes for producing a fluorinated ether compound are provided by which fluorinated ether compound capable of imparting excellent water/oil repellency, to a substrate surface or a hard coat layer can be easily produced in high yield. A process comprising reacting Rf(CF2)a—CF2OC(═O)Rf4 or Rf(CF2)a—C(═O)X1 with HN(—R1CH═CH2)2 to obtain Rf(CF2)a—C(═O)N(—R1CH2═CH2)2 and a process comprising obtaining the above product and reacting the product with HSiR2nL3-n to obtain Rf(CF2)a—C(═O)N(—R1CH2CH2SiR2nL3-n)2 wherein Rf is a linear polyfluoroalkyl group having at least two carbon atoms and at least one etheric oxygen atom between carbon atoms, Rf4 is a C1-30 perfluoroalkyl group or the like, X1 is a halogen atom, R1 is an alkylene group, a is an integer of from 1 to 5, R2 is a monovalent hydrocarbon group, L is a hydrolyzable group, and n is an integer of from 0 to 2.