Method for producing purified polytetrafluoroethylene aqueous dispersion liquid, method for producing modified polytetrafluoroethylene powder, method for producing polytetrafluoroethylene molded body, and composition

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2, and
• wherein the composition further includes at least any one of a compound represented by Formula (4) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene and a compound represented by Formula (4′) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene, and
• a nonionic surfactant in an amount of 1%/polytetrafluoroethylene or more:
• (H—(CF2)7—COO)pM1 Formula (4):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2;
• and
• (H—(CF2)8—COO)pM1 Formula (4′):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2, and
• wherein the composition further includes a compound represented by Formula (5) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene;
• and a nonionic surfactant in an amount of 1%/polytetrafluoroethylene or more:
• (H—(CF2)13—COO)pM1 Formula (5):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2, and
• wherein the composition further includes at least any one of a compound represented by Formula (5) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene and a compound represented by Formula (5′) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene, and
• a nonionic surfactant in an amount of 1%/polytetrafluoroethylene or more:
• (H—(CF2)13—COO)pM1 Formula (5):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2;
• and
• (H—(CF2)14—COO)pM1 Formula (5′):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes a compound represented by Formula (4) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene:
• (H—(CF2)7—COO)pM1 Formula (4):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes at least any one of a compound represented by Formula (4) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene and a compound represented by Formula (4′) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene:
• (H—(CF2)7—COO)pM1 Formula (4):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2;
• and
• (H—(CF2)8—COO)pM1 Formula (4′):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes a compound represented by Formula (5) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene:
• (H—(CF2)13—COO)pM1 Formula (5):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes at least any one of a compound represented by Formula (5) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene and a compound represented by Formula (5′) below in an amount up to 1000 ppb with respect to polytetrafluoroethylene,
• (H—(CF2)13—COO)pM1 Formula (5):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2;
• and
• (H—(CF2)14—COO)pM1 Formula (5′):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes a compound represented by Formula (4) below in an amount up to 25 ppb with respect to polytetrafluoroethylene:
• (H—(CF2)7—COO)pM1 Formula (4):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes at least any one of a compound represented by Formula (4) below in an amount up to 25 ppb with respect to polytetrafluoroethylene and a compound represented by Formula (4′) below in an amount up to 25 ppb with respect to polytetrafluoroethylene,
• (H—(CF2)7—COO)pM1 Formula (4):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2;
• and
• (H—(CF2)8—COO)pM1 Formula (4′):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes a compound represented by Formula (5) below in an amount up to 25 ppb with respect to polytetrafluoroethylene:
• (H—(CF2)13—COO)pM1 Formula (5):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.

A composition comprising polytetrafluoroethylene and substantially free from a compound represented by Formula (3) below:

• (H—(CF2)8—SO3)qM2 Formula (3):
• wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2,
• wherein the composition further includes at least any one of a compound represented by Formula (5) below in an amount up to 25 ppb with respect to polytetrafluoroethylene and a compound represented by Formula (5′) below in an amount up to 25 ppb with respect to polytetrafluoroethylene,
• (H—(CF2)13—COO)pM1 Formula (5):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2;
• and
• (H—(CF2)14—COO)pM1 Formula (5′):
• wherein M1 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and p is 1 or 2.