IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0355935
(1994-12-14)
|
|
발명자
/ 주소 |
- Hodgdon Russell B. (Harwich MA)
|
| 출원인 / 주소 |
- Ionics Incorporated (Watertown MA 02)
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| 인용정보 |
피인용 횟수 :
30 인용 특허 :
0 |
초록
▼
It has been discovered (Examples 4, 11 and 17) that certain desirable films will not absorb a sufficient amount of certain desirable, polymerizable monomers as to result in interpolymer membranes having desirable ion exchange properties after polymerization of any absorbed such monomers and after an
It has been discovered (Examples 4, 11 and 17) that certain desirable films will not absorb a sufficient amount of certain desirable, polymerizable monomers as to result in interpolymer membranes having desirable ion exchange properties after polymerization of any absorbed such monomers and after any subsequent conversion of such absorbed and polymerized monomers into ionizable moieties. It has also been discovered that if a predetermined amount of plasticizer, extractable by such monomers, is incorporated into such films, then the latter will absorb a sufficient amount of such monomers as to result (after polymerization of such monomers) in interpolymer membranes having desirable ion exchange properties. Examples of preferred monomers include the polar (meth) acryloxy and (meth) acrylamido monomers 2-(methacryloxy) ethane sulfonic acid, 2-(acrylamido)-2-methyl propane sulfonic acid, N-(2-methacryloxy ethyl)-N,N-dimethyl amine, N-(3-methacrylamido-propyl)-N,N-dialkyl-N-methyl ammonium halides and N-(2-methacryloxy ethyl)-N,N,N-trimethyl ammonium chloride. Such monomers may be mixed with a minor amount of crosslinking monomer such as divinyl benzene, ethylene glycol dimethacrylate and trimethylol propane trimethacrylate. Preferably any amine moieties in the resulting interpolymer membranes are converted to quaternary ammonium groups.
대표청구항
▼
An interpolymer strong base or strong acid ion exchange membrane comprising a copolymerizate of one or more ethylenically polymerizable monomers selected from the group consisting of 2-sulfoethyl methacrylate, acrylamidomethyl propyl sulfonic acid, dimethyl aminoethyl methacrylate, N,N-dialkyl amino
An interpolymer strong base or strong acid ion exchange membrane comprising a copolymerizate of one or more ethylenically polymerizable monomers selected from the group consisting of 2-sulfoethyl methacrylate, acrylamidomethyl propyl sulfonic acid, dimethyl aminoethyl methacrylate, N,N-dialkyl aminopropyl methacrylamides, N-(methacrylamido propyl)-N,N-dialkyl-N-methyl ammonium halides, methacryloxyethyltrimethyl ammonium chloride and mixtures thereof and one or more ethylenically polymerizable monomers selected from the group consisting of divinyl benzene, ethylene glycol dimethacrylate and trimethylolpropane trimethacrylate, said copolymerizate dispersed in a film comprising one or more polymers selected from the group consisting of polyvinyl chloride, polyvinylidene fluoride, polyvinyl bromide, polyvinyl fluoride, polyvinylidene chloride, polyacrylonitrile, polyethylene, styrene-butadiene copolymers, polyalkyl methacrylates, polyalkyl acrylates, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl alcohol copolymers, ethylene-propylene copolymers, vinylidene fluoride-chlorotrifluoroethylene copolymers, natural and synthetic rubbers and mixtures thereof, any tertiary amine moieties in said polymerizate having been converted at least in part to quarternary ammonium moieties.
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