摘要:
Triesters of triethanolmethane and a monocarboxylic acid, wherein said acid has from 3 to 15 carbon atoms. The triesters are particularly useful as plasticizers in polyvinyl chloride.
摘要:
A hydrocarbon-soluble corrosion inhibitor composition comprising the reaction product obtained by the acid-catalyzed oligomerization of an alkylaniline and formaldehyde, wherein the alkylaniline has from 4 to 30 carbon atoms in the alkyl substituent. Also disclosed is a method of inhibiting corrosion of a corrodible metal utilizing said composition.
摘要:
A catalyst composition for use in polymerizing alpha olefins which comprises (a) a solid supported titanium tetrahalide complex, wherein said complex is prepared by contacting a mechanically pulverized solid support with titanium tetrahalide in the absence of mechanical pulverization, and (b) a cocatalyst comprising a mixture of a dialkyl aluminum halide and a dialkyl magnesium compound.
摘要:
A catalyst composition for use in polymerizing alpha olefins which comprises a solid supported titanium complex and a cocatalyst comprising a mixture of an alkyl aluminum halide and a dialkyl magnesium or alkyl lithium compound.
摘要:
Processes for copolymerizing 2-pyrrolidone and caprolactam to yield a copolymer which can be formed into useful shaped articles, e.g., filaments. The processes are characterized by the use of both a crown ether and an N-acyl pyrrolidone activator and the use of a limited copolymerization temperature range.
摘要:
Copolymers of 2-pyrrolidone and C.sub.5 -C.sub.6 lactams (caprolactam and piperidone) are provided in solid form, at relatively high rates and molecular weights by polymerization in the presence of alkaline catalysts and carbon dioxide, by the inclusion of an auxiliary catalyst and a copolymerization promoter comprising certain onium salts and N-acyl lactams, respectively.
摘要:
The process of making a catalyst for the polymerization of 2-pyrrolidone by contacting an alkali metal pyrrolidonate, a quaternary ammonium carboxylate and carbon dioxide.
摘要:
The process of making a catalyst for the polymerization of 2-pyrrolidone by contacting a phosphonium halide, an alkali metal pyrrolidonate and carbon dioxide in a mol ratio of about 1:0.1-2:0.1-0.5 and the polymerization of 2-pyrrolidone with said catalyst. The alkali metal pyrrolidonate may be prepared by reacting an alkali metal hydroxide with 2-pyrrolidone. The polymerization of 2-pyrrolidone in the presence of this catalyst system produces poly-2-pyrrolidone of high molecular weight.
摘要:
Tetraols of the formula ##STR1## wherein R is hydrogen or hydroxy; R' is hydrogen or hydroxy and differs from R; n is an integer from 1 to about 6; and m is an integer from 0 to 6, are prepared by epoxidation of select unsaturated diols to form 1,2-epoxides, followed by hydroxylation of the epoxides.