Process for producing polyimide

Details Process for producing polyimide Process for producing polyimide

2005-07-12

2005-07-12

Hightower, P. Hampton (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S125000, C528S126000, C528S128000, C528S171000, C528S172000, C528S174000, C528S176000, C528S179000, C528S183000, C528S185000, C528S188000, C528S220000, C528S229000, C528S350000, C528S351000, C528S352000, C528S353000

Reexamination Certificate

active

06916898

ABSTRACT:
A process of preparing a polyimide of the present invention comprises effecting an imidization reaction of a diamine and a tetracarboxylic dianhydride in a solvent containing 50 to 100% by weight of an equimolar composition of a nitrogen-containing cyclic compound indicated by chemical formula (1) below and a phenol indicated by chemical formula (2) below:in formula (1), X represents —CH2— or —N(CH3)—, and in formula (2), R1and R2may be the same as, or different from, each other and represent each any one of —H, —OH, —CH3, —C2H5, —C3H7, —C4H9, —C5H11, —C6H13, —C7H15, —C8H17, —C9H19, —C10H21, —OCH3, —O(C6H5), —NO2, —Cl, —Br and —F.

REFERENCES:
patent: 4568715 (1986-02-01), Itatani et al.
patent: 4795798 (1989-01-01), Tamai et al.
patent: 4847349 (1989-07-01), Ohta et al.
patent: 4923968 (1990-05-01), Kunimune et al.
patent: 5300620 (1994-04-01), Okikawa et al.
patent: 5374708 (1994-12-01), Tamai et al.
patent: 6451955 (2002-09-01), Hausladen et al.
patent: 6458912 (2002-10-01), Kuroki et al.
patent: 6780960 (2004-08-01), Hausladen et al.
patent: 511813 (1992-11-01), None
patent: 04-142332 (1992-05-01), None
patent: 6-220194 (1994-08-01), None
patent: 09-302097 (1997-11-01), None
patent: 2000-001545 (2000-01-01), None
patent: 2000-103854 (2000-04-01), None
patent: 2000-191781 (2000-07-01), None
patent: 99/58595 (1999-11-01), None
S. Srinivas et al., “Semicrystalline Polyimides Based on Controlled Molecular Weight Phthalimide End-Capped 1,3-Bis(4-aminophenoxy)benzene and 3,3′,4,4′-Biphenyltetracarboxylic Dianhydride: Synthesis, Crystallization, Melting, and Thermal Stability”, Macromolecules 1997, pp. 1012-1022, vol. 30, No. 4.
S. Tamai et al., “Melt Processible Polyimides and Their Chemical Structures” Polymer 1996, pp. 3683-3692, vol. 37, No. 18, Elsevier Science Ltd., Great Britain.
S. Tamai et al., “Melt Processable Copolyimides Based on 4,4′-bis(3-aminophenoxy)biphenyl”, Polymer, 1998, pp. 1945-1949. vol. 39, No. 10, Elsevier Science Ltd., Great Britain.
T. Nakano, “Soluble Aromatic Polyimides”, 2ndIntern. Conf. on PI, 1985, pp. 163-181.

Affiliated with

Also associated with

Rating

Process for producing polyimide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing polyimide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing polyimide will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3409173