Membrane from epoxy-direct grafted halogenated vinyl polymer

• US 5,418,053 A
• Filed: 08/17/1994
• Issued: 05/23/1995
• Est. Priority Date: 06/10/1993
• Status: Expired due to Term

• Current Assignee: Koch Membrane Systems, Inc. (KOCH Industries Incorporated)
• Original Assignee: Koch Membrane Systems, Inc. (KOCH Industries Incorporated)
• Inventors: Lin, Juchui R.
• Primary Examiner(s): Sellers, Robert E.
• Application Number:
  US08/292,334
• Time in Patent Office: 279 Days
• Field of Search: 525/121, 525/326.2, 525/331.5, 428/304.4, 428/413, 428/421, 428/522
• US Class Current: 428/304.4
• CPC Class Codes: B01D 2323/38 Graft polymerization
• CPC Class Codes: B01D 67/0011 Casting solutions therefor
• CPC Class Codes: B01D 71/34 Polyvinylidene fluoride
• CPC Class Codes: B01D 71/78 Graft polymers
• CPC Class Codes: C08F 8/08 Epoxidation
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/31511 Of epoxy ether
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

A membrane useful as an ultrafiltration or reverse osmosis membrane is formed from the casting onto a substrate such as a porous polyester sheet a material comprising an epoxy- or trimethylene ether-direct grafted halogenated vinyl polymer prepared by the reaction of an epoxide such as a 5-ethyl,5'"'"'-methyl-hydantoin/epichlorohydrin condensation product with a halogenated vinyl polymer such as polyvinylidene fluoride in the presence of a metal halide catalyst. The ether residue of the epoxide or trimethylene-containing group is grafted directly to the first carbon-chain carbon of the halogenated vinyl polymer.

Claims

1. A membrane formed from a material comprising an epoxide modified halogenated vinyl polymer formed by contacting an epoxy-direct grafted halogenated vinyl polymer wherein an ether moiety of an epoxy-direct grafted group is bonded directly to a first carbon-chain carbon of a halogenated vinyl polymer, said first carbon-chain carbon being adjacent to a second carbon-chain carbon of the halogenated vinyl polymer, said second carbon-chain carbon bonded directly with two moieties selected from the group consisting of fluoro, chloro, bromo, iodo, methyl and hydro, provided that said second carbon-chain carbon has bonded directly thereto at least one fluoro, chloro, bromo or iodo moiety.

2. The membrane of claim 1, wherein said polymer comprises an epoxy-direct grafted fluorinated vinyl polymer.

3. A membrane formed from a material comprising a trimethylene ether-direct grafted halogenated vinyl polymer wherein an ether moiety of a trimethylene-containing group is bonded directly to a first carbon-chain carbon of a halogenated vinyl polymer, said first carbon-chain carbon being adjacent to a second carbon-chain carbon of the halogenated vinyl polymer, said second carbon-chain carbon bonded directly with two moieties selected from the group consisting of fluoro, chloro, bromo, iodo, methyl and hydro, provided that said second carbon-chain carbon has bonded directly thereto at least one fluoro, chloro, bromo or iodo moiety.

4. The membrane of claim 3, wherein said polymer comprises a fluorinated vinyl trimethylene ether polymer.