Composite material and method of producing

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

106772, 156 42, 423555, 428703, B32B 1302, C01D 500

Patent

active

053206770

ABSTRACT:
An improved composite material is produced by mixing gypsum and host particles of a stronger substance, such as wood fibers, in a dilute slurry; heating the slurry, under pressure, to convert the gypsum to calcium sulfate alpha hemihydrate; and substantially dewatering the hot slurry before rehydrating the hemihydrate back to gypsum. The resulting material is a homogoneous mass comprising gypsum crystals physically interlocked with the discrete host particles.
According to a further aspect of the invention, an improved wallboard, having fire resistance, dimensional stability and excellent strength properties, is produced by compressing the composite mass before hydrating it to a final set.

REFERENCES:
patent: 1907080 (1933-05-01), McMillan
patent: 3822340 (1976-06-01), Eberl et al.
patent: 3951735 (1976-04-01), Kondo et al.
patent: 3961105 (1976-06-01), Ebert et al.
patent: 4152408 (1979-05-01), Winslow
patent: 4239716 (1980-12-01), Ishida et al.
patent: 4328178 (1982-05-01), Kossatz
patent: 4392896 (1983-07-01), Sakakibara
patent: 4645548 (1987-02-01), Take et al.
patent: 4734163 (1988-03-01), Eeberhardt et al.
patent: 4840688 (1988-06-01), Vogt
Pit and Quarry, "Fundamentals of Gypsum Calcination", Apr. 1952 pp. 113-114, 118-123.
Ullmans Encyclopedia, "Calcium Sulfate" by Wirsching, vol. A4 pp. 555-584, no date.
Kirk Othmer Encyclopedia, "Calcium Compounds" by Hammond, 2d, vol. 4, pp. 14-27 no date.
The Encyclopedia of Chemistry, 3rd Ed, Hampel et al, 1973, p. 170.
"Gypsum Fibre Boards for the dry interior finish construction" Reprint from Holz-Zentralblatt vol. III, No. 11, Jan. 25, 1985.
Siemplelkamp "Plants for the Production of Gypsum Fiber Board" Date not shown.
"Bisonsystem--Gypsum Fiberboards Plants" publication of Bison Werke D-3257 Springe 1.
E. Frick, "Commissioning and operating experience at a gypsum calcining and gypsum chipboard plant. Part II Gypsum Chipboard Plant." Translation ZKG No. 7/88 (pp. 334-338) from German.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Composite material and method of producing does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-1246007

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.