Non-ionic surfactant composition and fluoropolymer aqueous dispersion
A nonionic surfactant composition including: a nonionic surfactant that contains a molecule having a C 10 -C 22 alkyl group and/or alkenyl group as a hydrophobic group, a polyoxyalkylene chain as a hydrophilic group, no aromatic ring, no C 9 -C 14 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and no C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process. The nonionic surfactant has a hydrodynamic radius of 5.0 to 8.0 nm at 40° C. in an aqueous solution in which a nonionic surfactant concentration is 0.1 kg/L in the nonionic surfactant composition, the radius being measured by a dynamic light scattering method.
1. A nonionic surfactant composition comprising:
a nonionic surfactant that comprises a molecule having a C 10 -C 22 alkyl group and/or alkenyl group as a hydrophobic group, a polyoxyalkylene chain as a hydrophilic group, no aromatic ring, no C 9 -C 14 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and no C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process,
wherein the nonionic surfactant has a hydrodynamic radius of 5.0 to 8.0 nm at 40° C. in an aqueous solution in which a nonionic surfactant concentration is 0.1 kg/L in the nonionic surfactant composition, the radius being measured by a dynamic light scattering method
wherein the nonionic surfactant comprises a nonionic surfactant represented by the formula (1):
R 1 O(CH 2 CH 2 O) n1 H
wherein R 1 is a C 13 linear or branched alkyl group (except a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process), and n 1 is an integer of 5 to 15, and
a nonionic surfactant represented by the formula (2):
R 2 O(CH 2 CH(CH 3 )O) m (CH 2 CH 2 O) n2 H
wherein R 2 is a C 10 -C 16 linear or branched alkyl group (except a C 10 -C 14 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process), n 2 is an integer of 5 to 20, and m is an integer of 1 to 6, and
wherein a molar ratio (1)/(2) of the nonionic surfactant represented by the formula (1) to the nonionic surfactant represented by the formula (2) is (99 to 60)/(1 to 40).
2. An aqueous fluoropolymer dispersion comprising:
a nonionic surfactant composition (A) according to claim 1 ;
a fluoropolymer (B), and
an aqueous medium (C).
3. A nonionic surfactant composition consisting of a nonionic surfactant and optionally water,
wherein the nonionic surfactant comprises a molecule having a C 10 -C 22 alkyl group and/or alkenyl group as a hydrophobic group, a polyoxyalkylene chain as a hydrophilic group, no aromatic ring, no C 9 -C 14 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and no C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process,
wherein the nonionic surfactant has a hydrodynamic radius of 5.0 to 8.0 nm at 40° C. in an aqueous solution in which a nonionic surfactant concentration is 0.1 kg/L in the nonionic surfactant composition, the radius being measured by a dynamic light scattering method, and
wherein the nonionic surfactant comprises two or more nonionic surfactants including a nonionic surfactant represented by the formula (1):
R 1 O(CH 2 CH 2 O) n1 H
wherein R 1 is a C 13 linear or branched alkyl group (except a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process), and n 1 is an integer of 5 to 15, and
a nonionic surfactant represented by the formula (3):
R 3 O(CH 2 CH 2 O) n3 H
wherein R 3 is a C 12 -C 14 saturated secondary alkyl group (except a C 12 -C 14 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process), and n 3 is an integer of 5 to 15.
4. The nonionic surfactant composition according to claim 3 ,
wherein a molar ratio (1)/(3) of the nonionic surfactant represented by the formula (1) to the nonionic surfactant represented by the formula (3) is (99 to 50)/(1 to 50).
5. A nonionic surfactant composition comprising:
a nonionic surfactant that comprises a molecule having a C 10 -C 22 alkyl group and/or alkenyl group as a hydrophobic group, a polyoxyalkylene chain as a hydrophilic group, no aromatic ring, no C 9 -C 14 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and no C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process,
wherein the nonionic surfactant has a hydrodynamic radius of 5.0 to 8.0 nm at 40° C. in an aqueous solution in which a nonionic surfactant concentration is 0.1 kg/L in the nonionic surfactant composition, the radius being measured by a dynamic light scattering method, and
wherein the nonionic surfactant comprises a nonionic surfactant represented by the formula (1):
R 1 O(CH 2 CH 2 O) n1 H
wherein R 1 is a C 13 linear or branched alkyl group (except a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process, and a C 13 alkyl group derived from an alcohol that is produced from a higher olefin derived from a propylene tetramer through an oxo process), and n 1 is an integer of 5 to 15),
a nonionic surfactant represented by the formula (4):
R 4 O(CH 2 CH 2 O) n4 H
wherein R 4 is a C 10 branched alkyl group (except a C 10 alkyl group derived from an alcohol that is produced from a higher olefin derived from a mixture of propylene and butene through an oxo process), and n 4 is an integer of 3 to 15, and
a nonionic surfactant represented by the formula (5):
R 5 O(CH 2 CH 2 O) n5 H
wherein R 5 is a C 18 branched alkyl group, and n 5 is an integer of 5 to 20.
6. The nonionic surfactant composition according to claim 5 ,
wherein a molar ratio (1)/(4)/(5) of the nonionic surfactant represented by the formula (1), the nonionic surfactant represented by the formula (4), and the nonionic surfactant represented by the formula (5) is (93 to 50)/(45 to 5)/(13 to 2).