Star-Shaped Alkyl Carbamates as Pour Point Depressants
| Autor: | Xin Chen, Johannes Smid, Chen-Lin Xia |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Alkane
chemistry.chemical_classification Tris Wax medicine.drug_class Mechanical Engineering Pour point Surfaces and Interfaces Methane Surfaces Coatings and Films chemistry.chemical_compound chemistry Mechanics of Materials visual_art medicine visual_art.visual_art_medium Organic chemistry Depressant Derivative (chemistry) Alkyl |
| Zdroj: | Tribology Transactions. 40:279-282 |
| ISSN: | 1547-397X 1040-2004 |
| DOI: | 10.1080/10402009708983656 |
| Popis: | A series of trialkyl carbamates of the general formula HC(Ph NHCOOCnH2n+1)3 with n = 16, 18, 20 and 22 were synthesized from alkanols and tris(p-isocyanatophenyl)methane. The star-shaped compounds effectively depress the pour point of wax-containing paraffin oil. A quantity of 0.1 wt.% of the C18 derivative, by far the most effective depressant, reduces the pour point of paraffin oil containing 11.5 wt.% wax (mp 56–61° C) from 33° C to - 4°C. The extent of the depression varies with the concentration and composition of the wax. The depressants are ineffective when pure alkane waxes are added to the paraffin oil. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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