Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1987-04-22
1991-01-22
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528128, 528188, 528220, 528229, 528352, C08G 802, C08G 1200, C08G 6926, C08G 6300
Patent
active
049872192
ABSTRACT:
A copolymeric amphiphilic polyimide precursor having the recurring unit of the formula (1): ##STR1## wherein R.sup.1 is a tetravalent group having at least 2 carbon atoms, R.sup.2 is a bivalent group having at least 2 carbon atoms, and R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are hydrogen atom or a monovalent group having 1 to 30 carbon atoms selected from the group consisting of an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an aromatic group, or an alicyclic group, and their groups substituted by a halogen atom, nitro group, amino group, cyano group, methoxy group or acetoxyl group, provided that at least one of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is neither hydrogen atom nor the above-mentioned group which has 1 to 11 carbon atoms; a part of at least one of said R.sup.1 and said R.sup.2 being substituted with a group having a valence different therefrom. The precursor of the present invention can provide thin films by the LB technique, and by ring closure of the obtained LB films, there can be obtained ultrathin films having excellent heat resistance, electric properties, chemical resistance and mechanical properties, and having a thickness of not more than 10,000 .ANG., and if desired, a thickness of 10 to 1,000 .ANG.. Further, according to the process of the invention, polyimide thin films having a wide range of properties can be easily prepared. When a part of the group R.sup.2 is substituted with a trivalent or tetravalent group, the heat resistance can be improved since a ring having better heat resistance than an imide ring is formed.
REFERENCES:
patent: 4321319 (1982-03-01), Shoji et al.
patent: 4454276 (1984-06-01), Uda et al.
Alan K. Engel, Tomoko Yoden, Kohei Sanui, and Naoya Ogata, J. Am. Chem. Soc., (1985), 107, 8308-8310.
M. Suzuki, M. Kakimoto, T. Konishi, Y. Imai, M. Iwamoto and T. Hino, Chemistry Letters, (1986), 395-398.
M. Kakimoto, M. Suzuki, T. Konishi, Y. Imai, M. Iwamoto and T. Hino, Chemistry Letters, (1986), 823-826.
Alan K. Engel, Tomoko Yoden, Kohei Sanui and Naoya Ogata, Polymeric Materials Science and Engineering, 54, (1986), 119-123.
Chemical Abstracts, vol. 100, No. 10, 5th Mar. 1984, p. 10, abstract No. 68897m, Columbus, Ohio, U.S.; A. I. Volozhin et al.
Chemical Abstracts, vol. 102, No. 26, 1st Jul. 1985, p. 6, abstract No. 221283w, Columbus, Ohio, U.S.; L. Minnema et al.
Awaji Hiroshi
Uekita Masakazu
Hampton-Hightower P.
Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha
Kight III John
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