EP0779335A1
Expired / Lapsed
EP
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Aqueous dispersion of vinylidene fluoride copolymer, aqueous dispersion of vinylidene fluoride seed polymer, and processes for producing the dispersions
Assignee: Daikin Industries Ltd
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Filing: 1995-08-23
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Granted: —
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Expires: 2015-08-23
Abstract
Abstract To provide an aqueous dispersion of a vinylidene fluoride (VdF) copolymer which can be prepared by emulsion-polymerizing VdF monomer with a reactive emulsifying agent and is excellent in stability against sedimentation because an average particle size of the copolymer is as small as not more than 200 nm and a solid content is as high as from 30 to 60 % by weight; an aqueous dispersion of a VdF seed polymer which can be prepared by seed-polymerizing an ethylenically unsaturated monomer in the presence of particles obtained by emulsion-polymerizing VdF monomer with a reactive emulsifying agent and is excellent in stability against sedimentation because an average particle size of the seed polymer is as small as not more than 250 nm and a solid content is as high as from 30 to 60 % by weight; and processes for preparation thereof.
Inventors
- 👤 Nobuhiko Tsuda
- 👤 Ryuzi Iwakiri
- 👤 Yasushi Yodogawa-Seisakusho YONEI
- 👤 Katsuhiko Yodogawa-seisakusho IMOTO
- 👤 Yoshiki Yodogawa-seisakusho SHIMIZU
- 👤 Takayuki Yodogawa-Seisakusho Araki
- 👤 Masahiro Yodogawa-Seisakusho Kondo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 01:31
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L51/00; C08L51/06; C08F; C08F214/00; C08F214/18; C08F214/22; C08L51/003; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/16; C08L2201/00; C08L2201/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
283 words
An aqueous dispersion of a vinylidene fluoride copolymer, characterized in that the dispersion has a solid content of 30 to 60 % by weight and an average particle size of the copolymer of not more than 200 nm; the copolymer being prepared by copolymerizing vinylidene fluoride monomer with at least one reactive emulsifying agent selected from the group consisting of those represented by the formula (I): CF 2 = CF(̵CF 2 )̵ a Y (I) wherein a is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , b is an integer of 1 to 5, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , c is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , d is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula (V): CH 2 = CFCF 2 -O(̵CF(CF 3 )CF 2 O)̵ e CF(CF 3 )-Y (V) wherein e is 0 or an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), and the formula ( ): wherein f is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal).
Claim 2
Dependent Claim
330 words
A process for preparing an aqueous dispersion of a vinylidene fluoride copolymer, characterized in that, when preparing the aqueous dispersion of the vinylidene fluoride copolymer by emulsion-polymerizing vinylidene fluoride monomer with a reactive emulsifying agent, 0.00001 to 10 % by weight, on the basis of water, of at least one reactive emulsifying agent selected from the group consisting of those represented by the formula (I): CF 2 = CF(̵CF 2 )̵ a Y (I) wherein a is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , b is an integer of 1 to 5, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , c is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): CF 2 = CF-O(̵CF 2 CFXO)̵ d CF 2 CF 2 -Y wherein X is F or CF 3 , d is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula (V): CH 2 = CFCF 2 -O(̵CF(CF 3 )CF 2 O)̵ e CF(CF 3 )-Y (V) wherein e is 0 or an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), and the formula ( ): wherein f is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal) is used, and that a solid content of the aqueous dispersion is adjusted to 30 to 60 % by weight and an average particle size of the copolymer is adjusted to not more than 200 nm.
Claim 3
Dependent Claim
305 words
An aqueous dispersion of a vinylidene fluoride seed polymer prepared by emulsion-polymerizing an ethylenically unsaturated monomer in the presence of vinylidene fluoride copolymer particles, characterized in that the vinylidene fluoride copolymer is a copolymer prepared by copolymerizing vinylidene fluoride monomer with at least one reactive emulsifying agent selected from the group consisting of those represented by the formula (I): CF 2 = CF(̵CF 2 )̵ a Y (I) wherein a is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , b is an integer of 1 to 5, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , c is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , d is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula (V): CH 2 = CFCF 2 -O(̵CF(CF 3 )CF 2 O)̵ e CF(CF 3 )-Y (V) wherein e is 0 or an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), and the formula ( ): wherein f is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), and that the dispersion has a solid content of 30 to 60 % by weight and an average particle size of the copolymer of not more than 250 nm.
Claim 4
Dependent Claim
340 words
A process for preparing an aqueous dispersion of a vinylidene fluoride seed polymer, characterized in that when preparing the aqueous dispersion of the vinylidene fluoride seed polymer by emulsion-polymerizing an ethylenically unsaturated monomer in the presence of vinylidene fluoride copolymer particles, the vinylidene fluoride copolymer is prepared through emulsion polymerization of a vinylidene fluoride monomer with 0.00001 to 10 % by weight, on the basis of water, of at least one reactive emulsifying agent selected from the group consisting of those represented by the formula (I): CF 2 = CF(̵CF 2 )̵ a Y (I) wherein a is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , b is an integer of 1 to 5, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , c is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula ( ): wherein X is F or CF 3 , d is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), the formula (V): CH 2 = CFCF 2 -O(̵CF(CF 3 )CF 2 O)̵ e CF(CF 3 )-Y (V) wherein e is 0 or an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), and the formula ( ): wherein f is an integer of 1 to 10, Y is SO 3 M or COOM (M is H, NH 4 or an alkali metal), and that a solid content of the aqueous dispersion of the seed polymer and an average particle size of the seed polymer are adjusted to 30 to 60 % by weight and not more than 250 nm.
References Cited (Backward Citations)
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