Polyimide foams

Details Polyimide foams Polyimide foams

2005-05-05

2009-06-02

Zemel, Irina S (Department: 1796)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S119000, C521S129000, C521S157000, C521S163000, C521S088000, C528S353000

Reexamination Certificate

active

07541388

ABSTRACT:
A fully imidized, solvent-free polyimide foam having excellent mechanical, acoustic, thermal, and flame resistant properties is produced. A first solution is provided, which includes one or more aromatic dianhydrides or derivatives of aromatic dianhydrides, and may include one or more aromatic diamines, dissolved in one or more polar solvents, along with an effective amount of one or more blowing agents. This first solution may also advantageously include effective amounts respectively of one or mores catalysts, one or more surfactants, and one or more fire retardants. A second solution is also provided which includes one or more isocyanates. The first and second solutions are rapidly and thoroughly mixed to produce an admixture, which is allowed to foam—in an open container, or in a closed mold—under ambient conditions to completion produce a foamed product. This foamed product is then cured by high frequency electromagnetic radiation, thermal energy, or a combination thereof. Alternatively, the process is adapted for spraying or extrusion.

REFERENCES:
patent: 3554939 (1971-01-01), Lavin et al.
patent: 3708458 (1973-01-01), Alberino et al.
patent: 3772216 (1973-11-01), Rosser
patent: 3787367 (1974-01-01), Farrissey et al.
patent: 3966652 (1976-06-01), Gagliani et al.
patent: 4026833 (1977-05-01), D'Alelio
patent: 4177333 (1979-12-01), Riccitiello et al.
patent: 4184021 (1980-01-01), Frosch et al.
patent: 4305796 (1981-12-01), Gagliani et al.
patent: 4315076 (1982-02-01), Gagliani et al.
patent: 4315077 (1982-02-01), Gagliani et al.
patent: 4439381 (1984-03-01), Gagliani et al.
patent: 4535099 (1985-08-01), Lee et al.
patent: 4738990 (1988-04-01), Nelb, II et al.
patent: 4748255 (1988-05-01), Parker et al.
patent: 4900761 (1990-02-01), Lee et al.
patent: 4946873 (1990-08-01), Carter et al.
patent: 5077318 (1991-12-01), Barringer et al.
patent: 5122546 (1992-06-01), Lee
patent: 5298531 (1994-03-01), Ishikura et al.
patent: 5994418 (1999-11-01), Weiser et al.
patent: 6057379 (2000-05-01), Choi et al.
patent: 6084000 (2000-07-01), Weiser et al.
patent: 6133330 (2000-10-01), Weiser et al.
patent: 6172127 (2001-01-01), Choi et al.
patent: 6180746 (2001-01-01), Weiser et al.
patent: 6222007 (2001-04-01), Cano et al.
patent: 6235803 (2001-05-01), Weiser et al.
patent: 2002/0002208 (2002-01-01), Martel et al.
patent: 2003/0065044 (2003-04-01), Ozawa et al.
patent: 2004/0249002 (2004-12-01), Vazquez et al.

Affiliated with

Also associated with

Rating

Polyimide foams does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4081779