[특허]Composite semipermeable membranes made from polyethylenimine

Composite semipermeable membranes made from polyethylenimine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-039/00 B01D-031/00
출원번호	US-0503400 (1974-09-05)
발명자 / 주소	Wrasidlo Wolfgang J. (La Mesa CA)
출원인 / 주소	Universal Oil Products Company (Des Plaines IL 02)
인용정보	피인용 횟수 : 70 인용 특허 : 0

초록 ▼

Composite semipermeable membranes are made by reacting a film-forming polymer with a cross-linking monomer to form a polymeric ultrathin film having semipermeable properties. During the formation, a grafting reaction is carried out at reactive sites so there are few remaining active sites where oxidizing attack or fouling can potentially occur. One composite membrane comprises a microporous substrate and an ultrathin polyamide film formed of polyethylenimine cross-linked with a monomer, such as an acyl halide, a chloroformate, an isocyanate or a sulfonyl chloride. Grafted onto the cross-linked polyethylenimine at what would otherwise be secondary amido sites is an epoxide, an aldehyde, an anhydride or a reactive ethylene compound.

대표청구항 ▼

A composite semipermeable membrane which comprises a microporous substrate and an ultrathin film formed of a crosslinked, grafted polyethylenimine having semipermeable properties disposed on one surface of said microporous substrate, said ultrathiN film being formed of polyethylenimine that has been cross-linked with a di- or tri-functional compound selected from the group consisting of acyl halides, chloroformates, isocyanates and sulfonyl chlorides, said crosslinked polyethylenimine also having grafted thereonto, at what would otherwise be secondary amido sites, a graft reactant selected from the group consisting of acrylonitrile, epichlorohydrin and phthalic anhydride.

이 특허를 인용한 특허 (70)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Composite semipermeable membranes made from polyethylenimine 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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Composite semipermeable membranes made from polyethylenimine 원문보기

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대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (70)

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