Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1989-08-22
1991-01-08
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
521 64, 528312, 528322, C08G 7310
Patent
active
049837176
ABSTRACT:
A membrane filter material formed from a solvent resistant bismaleimide polymer which is formed by polymerizing a bismaleimide compound with a perhydrodiaza-type heterocyclic compound and has a main structural skeleton represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a lower carbon chain which is linear or contains a methyl group or ethyl group on the side chain, R.sub.5 represents a divalent group containing an aromatic ring, Y is >R< or >N--R--N< in which R is a lower carbon chain, and m is 0 or 1.
This bismaleimide polymer can be a membrane filter material having an excellent organic solvent resistance. When this polymer is formed into a hollow fiber or plain film, a high separating and filtering capacity and an excellent organic resistance can be attained. A membrane filter material having an enhanced organic solvent resistance is provided by preparing the bismaleimide polymer by reacting the bismaleimide compound and perhydrodiaza-type heterocyclic compound in a halogen-containing organic solvent in the presence of a small amount of a phenol.
REFERENCES:
patent: 4921931 (1990-05-01), Wang
patent: 4923959 (1990-05-01), Kan et al.
patent: 4927907 (1990-05-01), Corley
Kan Kojiro
Nakayama Yoshio
Watanabe Masanobu
Yamamoto Kimio
Yamasaki Kazuyuki
Foelak Morton
Mitsui Petrochemical Industries Ltd.
LandOfFree
Membrane filter material having excellent organic solvent resist does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Membrane filter material having excellent organic solvent resist, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane filter material having excellent organic solvent resist will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-935755