Iodine-containing compound, preparation thereof and block copolymer comprising the same
AssigneeDaikin Industries, Ltd.
InventorsMasayoshi Tatemoto, Yuji Yutani, Koji Fujiwara
Life of this patent
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Abstract
An iodine-containing compound consisting of at least two repeating units selected from the formulae: --(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a -- --(CHClCF.sub.2 CF.sub.2 O).sub.b -- --(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c -- --(CHFCF.sub.2 CF.sub.2 O).sub.d -- --(CFClCF.sub.2 CF.sub.2 O).sub.e -- --(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.f -- wherein a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations: 2.ltoreq.a+b+c+d+e+f.ltoreq.200 and 1.ltoreq.a+c+d+f and an iodine atom at at least one end of a molecule, which can provide a block copolymer which is useful as a grease.
Claims9
A grease which comprises a block copolymer comprising at least two kinds of blocks at least one of which consists of a homopolymeric or random copolymer block which acts as a viscous liquid component comprising at least one block selected from the group consisting of:
- (a) a block consisting of at least two repeating units selected from the formulae:
- --(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a --
- --(CHClCF.sub.2 CF.sub.2 O).sub.b --
- --(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c --
- --(CHFCF.sub.2 CF.sub.2 O).sub.d --
- --(CFClCF.sub.2 CF.sub.2 O).sub.e --
- --(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.f --
- a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations:
- 2.ltoreq.a+b+c+d+e+f.ltoreq.200
- and
- 1.ltoreq.a+c+d+f
- (b) a block consisting of the repeating units of the formula:
- ##STR18## wherein p, q and r are each 0 or a positive integer and satisfy the following equations:
- .ltoreq. p+q+r.ltoreq.200
- and
- 1.ltoreq.p+q
- (c) a block consisting of the repeating units of the formula:
- ##STR19## wherein R.sub.f1 and R.sub.f2 are the same or different and C.sub.1 -C.sub.3 perfluoroalkyl, k and m are each a positive integer and satisfy the equations:
- .ltoreq. k+m.ltoreq.50
- and
- 0.2.ltoreq.m/(k+m),
- and n is an integer of 0 to 10, and
- (d) a block consisting of repeating units of the formula:
- --(CF.sub.2 CFCl).sub.x --
- wherein x is an integer of 2 to 11 and at least one of other of which consists of a homompolymeric or random copolymeric block bonded to the former block to make the block copolymer solid or semi-solid.
A grease composition which comprises 0.5 to 60% by weight of a block copolymer comprising at least two kinds of blocks at least one of which consists of a homopolymeric or random copolymeric block which acts as a viscous liquid component comprising at least one block selected from the group consisting of:
- (a) a block consisting of at least two repeating units selected from the formulae:
- --(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a --
- --(CHClCF.sub.2 CF.sub.2 O).sub.b --
- --(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c --
- --(CHFCF.sub.2 CF.sub.2 O).sub.d --
- --(CFClCF.sub.2 CF.sub.2 O).sub.e --
- --(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.f --
- a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations:
- 2.ltoreq.a+b+c+d+e+f.ltoreq.200
- and
- 1.ltoreq.a+c+d+f,
- (b) a block consisting of the repeating units of the formula:
- ##STR20## wherein p, q and r are each 0 or a positive integer and satisfy the following equations:
- .ltoreq. p+q+r.ltoreq.200
- and
- 1.ltoreq.p+q,
- (c) a block consisting of the repeating units of the formula:
- ##STR21## wherein R.sub.f1 and R.sub.f2 are the same or different and C.sub.1 -C.sub.3 perfluoroalkyl, k and m are each a positive integer and satisfy the equations:
- .ltoreq. k+.ltoreq.50
- and
- 0.2.ltoreq.m/(k+m),
- and n is an integer of 0 to 10, and
- (d) a block consisting of repeating units of the formula:
- --(CF.sub.2 CFCl).sub.x --
- wherein x is an integer of 2 to 11 and at least one of other of which consists of a homopolymer or random copolymeric block bonded to the former block to make the block copolymer solid or semi-solid and an organic liquid.
Dependencies are inferred from the claim text.