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특허 상세정보

Capsule manufacture

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B01J-013/02   
미국특허분류(USC) 427/213.34 ; 71/64.11 ; 264/4.7 ; 424/497 ; 426/650 ; 427/151 ; 427/152 ; 428/402.22 ; 428/402.24 ; 428/914 ; 503/215
출원번호 US-0755832 (1976-12-30)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Birch, Stewart, Kolasch and Birch
인용정보 피인용 횟수 : 91  인용 특허 : 1
초록

A process is disclosed for performing encapsulation, en masse, by an in situ polymerization reaction to yield capsule wall material. The polymerization includes a reaction between urea and formaldehyde or polycondensation of monomeric or low molecular weight polymers of dimethylol urea or methylated dimethylol urea in an aqueous vehicle and the reaction is conducted in the presence of negatively-charged, carboxyl-substituted, linear aliphatic hydrocarbon polyelectrolyte material dissolved in the vehicle. Liquid-liquid phase separation is accomplished and...

대표청구항이 없습니다

이 특허를 인용한 특허 피인용횟수: 91

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