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Methylene diphenyl diisocyanate (MDI) is an aromatic di isocyanate. Three isomers are common, varying by the positions of the isocyanate groups around the rings: 2,2′-MDI, 2,4′-MDI, and 4,4′-MDI. The 4,4′ isomer is most widely used, and is also known as 4,4′-diphenylmethane diisocyanate. [3] This isomer is also known as Pure MDI.
The National Wood Carvers Association is best known for its publication, the magazine Chip Chats. The organization, founded in 1953 by Stephen LePage, is headquartered in Cincinnati, Ohio. It is the largest national association of woodcarvers, with a magazine membership of over 13,000 subscribers, compared with 19 when the magazine was first ...
A caricature carver, he specializes in carving multi-figure scenes from a single block of basswood. The carvings are finished with sealer but not varnished and presented either without color or with a hand-painted watercolor finish and then waxed. Kaisersatt has taught classes (held through Whillock Studios and CCA) focusing on design, clay ...
A blocked isocyanate can be added to materials that would normally react with the isocyanate such as polyols.They do not react at normal ambient room temperature. A formulation containing a blocked isocyanate is a single component material (and thus usually considered more convenient) but reacts like a two-component product but will not react until heated to the temperature required for ...
Infobox references. 4,4′-Methylenedianiline (MDA) is an organic compound with the formula CH2(C6H4NH2)2. It is a colorless solid, although commercial samples can appear yellow or brown. It is produced on an industrial scale, mainly as a precursor to polyurethanes.
Ward brothers (carvers) The Ward Brothers, Lemuel T. Ward (1897–1984) and Steven W. Ward (1895–1976), were two brothers from Crisfield, Maryland, who became famous for their wooden wildfowl carvings, commonly called decoys. Their decoys are highly prized by collectors. Few examples of their work survive on the open market, as private ...
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