Fluorine-Containing Diblock Copolymer

摘要

Provided is a fluorine-containing diblock copolymer having good water and oil repellency by using, as a raw material, a fluorine-containing (meth)acrylic ester having low bioaccumulation potential. The fluorine-containing diblock copolymer is produced by: process (A) a process for producing a fluorine-containing diblock copolymer by polymerizing a fluorine-containing (meth)acrylic ester represented by the following formula (1) in the presence of a trithiocarbonic ester compound and a radical polymerization initiator and then polymerizing a non-fluorine vinyl-based monomer, or process (B) a process for producing a fluorine-containing diblock copolymer by polymerizing a non-fluorine vinyl-based monomer in the presence of a trithiocarbonic ester compound and a radical polymerization initiator and then polymerizing a fluorine-containing (meth)acrylic ester represented by the following formula (1).;

主权项

1. A fluorine-containing diblock copolymer produced by either the following process (A) or the following process (B):
Process (A) a production process comprising
[first step] a step of polymerizing a fluorine-containing (meth)acrylic ester represented by the following formula (1) in the presence of a trithiocarbonic ester compound and a radical polymerization initiator to give a polymer of the fluorine-containing (meth)acrylic ester, and[second step] a step of polymerizing a non-fluorine vinyl-based monomer in the presence of the polymer of the fluorine-containing (meth)acrylic ester obtained in the first step to give a fluorine-containing diblock copolymer; Process (B) a production process comprising
[first step] a step of polymerizing a non-fluorine vinyl-based monomer in the presence of a trithiocarbonic ester compound and a radical polymerization initiator to give a polymer of the non-fluorine vinyl-based monomer, and[second step] a step of polymerizing a fluorine-containing (meth)acrylic ester represented by the following formula (1) in the presence of the polymer of the non-fluorine vinyl-based monomer obtained in the first step to give a fluorine-containing diblock copolymer; wherein R1 is a hydrogen atom or a methyl group,
a is an integer of 1 to 3, b is an integer of 1 to 2, n is an integer of 1 to 6,—CnF2n+1 group is bonded to CH2 group of —(CF2CH2)b— group, and—(CF2CF2)a— group is bonded to CF2 group of —(CF2CH2)b— group.