|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||52/5244 ; 52/525.9 ; 52/526.3 ; 52/526.7 ; 52/527.3 ; 52/529.3 ; 52/529.4 ; 52/529.6 ; 52/529.9|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 11 인용 특허 : 16|
A block copolymer of a hydrophobic block of one or more hydrophobic monomers and a hydrophilic block of one or more hydrophilic monomers is prepared by polymerizing a hydrophobic monomer to prepare the hydrophobic block, using a free radical polymerization process using a stable free radical agent, preserving a stabilized active polymerization site on the hydrophobic block; adding a hydrophilic monomer to the stabilized active hydrophobic block; and further reacting the mixture to effect polymerization of the hydrophilic monomer. The polymerization of th...
[ What is claimed is:] [1.] A process for preparing a block copolymer comprising a hydrophobic block (A) comprising one or more hydrophobic monomers and a hydrophilic block (B) comprising one or more hydrophilic monomers, said process comprising:(a) first polymerizing at least one hydrophobic monomer comprising at least one vinyl aromatic monomer to prepare a hydrophobic block as an end block, using a free radical polymerization process,wherein a stable free radical agent is employed during the polymerization, thereby preserving a stabilized active polym...