Production of foamed polymer structures

Details Production of foamed polymer structures Production of foamed polymer structures

1988-11-28

1989-08-08

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 26, 264 54, 521 77, 521183, 521185, 521189, 521915, 528229, 528353, B29C 3500, C08J 902

Patent

active

048553310

ABSTRACT:
Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, during the application of the microwave radiation, the body of polyimide precursor and of the foam structure as it is developing therefrom are maintained under a substantially vapor-impermeable mmicrowave-compatible shroud that does not substantially restrict or impede development of the foam structure; and the microwave radiation is directed upon the top, sides and ends of the body of polyimide precursor and of the foam structure as it is developing, but the extent to which such radiation impinges upwardly into the bottom of said body and said foam structure is curtailed, preferably by means of a metallic shield located below the precursor and developing foam structure. Mechanisms by which the shields and shrouds function to provide the improvements of the process are discussed, and methods based thereon are set forth.

REFERENCES:
patent: Re30213 (1980-02-01), Gagliani et al.
patent: Re32255 (1986-09-01), Gagliani et al.
patent: Re32356 (1986-09-01), Gagliani et al.
patent: 3506583 (1970-04-01), Boram et al.
patent: 3700649 (1972-10-01), Boram et al.
patent: 3726831 (1973-04-01), Acle et al.
patent: 3726834 (1973-04-01), Acle
patent: 3793281 (1974-02-01), Acle
patent: 4070312 (1978-01-01), Gagliani et al.
patent: 4153783 (1979-05-01), Gagliani et al.
patent: 4241114 (1980-12-01), Gagliani
patent: 4241193 (1980-12-01), Gagliani
patent: 4255488 (1981-03-01), Gagliani
patent: 4273886 (1981-06-01), Gagliani
patent: 4296208 (1981-10-01), Gagliani
patent: 4299787 (1981-11-01), Gagliani
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: 4315080 (1982-02-01), Gagliani et al.
patent: 4319000 (1982-03-01), Gagliani et al.
patent: 4332656 (1982-06-01), Gagliani et al.
patent: 4346182 (1982-08-01), Gagliani et al.
patent: 4353998 (1982-10-01), Gagliani et al.
patent: 4355120 (1982-10-01), Gagliani et al.
patent: 4360604 (1982-11-01), Gagliani et al.
patent: 4361453 (1982-10-01), Gagliani et al.
patent: 4363690 (1982-12-01), Gagliani et al.
patent: 4363883 (1982-12-01), Gagliani et al.
patent: 4367296 (1983-01-01), Gagliani et al.
patent: 4369261 (1983-01-01), Gagliani et al.
patent: 4407980 (1983-10-01), Gagliani et al.
patent: 4425441 (1984-01-01), Gagliani et al.
patent: 4426463 (1984-01-01), Gagliani et al.
patent: 4433068 (1984-02-01), Long et al.
patent: 4439381 (1984-03-01), Gagliani et al.
patent: 4442283 (1984-04-01), Gagliani et al.
patent: 4444823 (1984-04-01), Gagliani et al.
patent: 4468431 (1984-08-01), Okey
patent: 4476254 (1984-10-01), Long et al.
patent: 4506038 (1985-03-01), Gagliani et al.
patent: 4518717 (1985-05-01), Long et al.
patent: 4535099 (1985-08-01), Lee et al.
patent: 4535101 (1985-08-01), Lee et al.
patent: 4539336 (1985-09-01), Long et al.
patent: 4539342 (1985-09-01), Lee et al.
patent: 4546115 (1985-10-01), Gagliani et al.
patent: 4556682 (1985-12-01), Gagliani et al.
patent: 4562112 (1985-12-01), Lee et al.
patent: 4576862 (1986-03-01), Lee et al.
patent: 4585805 (1986-04-01), Gagliani et al.
patent: 4599365 (1986-07-01), Gagliani et al.
patent: 4600770 (1986-07-01), Gagliani et al.
patent: 4604409 (1986-08-01), Gagliani et al.
patent: 4621015 (1986-11-01), Long et al.
patent: 4639343 (1987-01-01), Long et al.
patent: 4647597 (1987-03-01), Shulman et al.
patent: 4656198 (1987-04-01), Shulman et al.
patent: 4708972 (1987-11-01), Long et al.
Gagliani, et al, NAS9-15848, Final Report 2/15/77-4/15/80 Entitled "Development of Fire-Resistant, Low Smoke Generating, Thermally Stable End Items for Commercial Aircraft & Spacecraft Using a Basic Polyimide Resin".

Affiliated with

Also associated with

Rating

Production of foamed polymer structures does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-905996