Although the aldehyde-nitroparaffin condensation to give nitroalcohols has been known for over forty years, many of the simple aliphatic nitroalcohols had not been preparéd until this investigation was undertaken.Recent developments in vapor-phase nitration have made the lower aliphatic nitroparaffins available (3). By means of condensations of nitroethane, the nitropropanes, and the nitrobutanes with formaldehyde, acetaldehyde, and butyral-dehyde, respectively, a number of monohydric and dihydric alcohols have been prepared. Typical acetates of these alcohols have been synthesized. Reduction of the nitroalcohols gives the corresponding aminoalcohols.
Green Valley, Arizona 85614 Most U.S. companies have an R&D department. Large companies and corporations may have a separate R&D company as an affiliate. This type of enterprise, which has only become commonplace in the 20th Century, must have had a beginning. Who was first?If you read the chemical literature, you get many answers-General Electric, Eastman Kodak, and Du Pont being most frequently mentioned. The then ACS president, Glenn Seaborg, in this Centennial address to the Society in 1976, stated that "General Electric set up the first industrial laboratory in the United States devoted to basic science ..."(f).
Elastomers can be bonded to fibrous glass using a chemical at the interface which is capable of reacting with both glass and rubber. Organic silanes have proven most useful for this purpose. Unsaturated silanes are very effective for bonding glass to peroxide-cured elastomers. Use of a nonconjugated diolefin as coupling agent between silane and elastomer greatly enhances the degree of bonding. Certain substituted alkyl silanes are effective when used with the right combination of rubber and curative. Bonding strengths at ordinary temperatures approach or exceed those of the respective vulcanizates. Glass-elastomer adhesions at elevated temperatures show promise. All commercial elastomers can be effectively bonded to fibrous glass.
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