Copolymerized polyamic acid salts and process of producing them

Details Copolymerized polyamic acid salts and process of producing them Copolymerized polyamic acid salts and process of producing them

1987-06-01

1990-09-04

Knight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528172, 528186, 528188, 528220, 528229, 528310, 528339, 528352, 528353, C08G 7310, C08G 6926, C08G 6932

Patent

active

049546082

ABSTRACT:
A copolymerized polyamic acid salt having a recurring unit represented by following formula (I) and (II) and the process for preparing thereof. ##STR1## wherein (A) or (A') represents a formula ##STR2## wherein, R.sup.1 represents a tetravalent group having at least 2 carbon atoms; R.sup.2 represents a divalent group having at least 2 carbon atoms; and R.sup.31, R.sub.32, R.sup.33, R.sup.41, R.sup.42, R.sup.43, R.sup.5, and R.sup.6 each represents a monovalent group having 1 to 30 carbon atoms selected from an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an alicyclic group or an aromatic group, each of these groups substituted by a halogen atom, a nitro group, an amino group, a cyano group, a methoxy group, or an acetoxy group, or a hydrogen atom; at least one of said R.sup.31, R.sup.32, R.sup.33, R.sup.41, R.sup.42, R.sup.43, R.sup.5 and R.sup.6 do not take a group having 1 to 11 carbon atoms or a hydrogen atom; and (B) or (B') represents one or more formula ##STR3## wherein R.sup.1, R.sup.2, R.sup.31, R.sup.32, R.sup.33, R.sup.41, R.sup.42, R.sup.43, R.sup.5 and R.sup.6 are defined in (A); and x and y represents a ratio which satisfies 0 x 1, 0 y 1 and x+y=1.
In formula (I) at least one of said R.sup.1, R.sup.2, R.sup.31, R.sup.32, R.sup.33, R.sup.41, R.sup.42, R.sup.43, R.sup.5 and R.sup.6 do not take the same group as defined in (A), and in formula (II) a part of at least one of R.sup.1 and R.sup.2 is substituted by a group having a different valence.

REFERENCES:
patent: 4376195 (1983-03-01), Lee
patent: 4454276 (1984-06-01), Uda et al.
patent: 4487911 (1984-12-01), Lange et al.
patent: 4551522 (1985-11-01), Fryd et al.

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