摘要:
New alpha-halogeno-lauroyl peroxides are described with novel processes of making them and with some reference to their uses. In general, they are prepared by mixing an alpha-halogeno-lauroyl halide diluted in a solvent inert to the constituents of the reaction medium with hydrogen peroxide in the presence of caustic soda under conditions of temperature, pressure, agitation favorable to their reaction.
IN WHICH R is alkyl containing from 1 to 14 carbon atoms, and X is hydrogen or methyl are new compounds which resemble common diacyl peroxides in manner of decomposition, but exhibit important differences in chemical and physical properties. The new peroxides are liquids at ambient temperatures and possess a higher degree of thermal stability than the commonly used aliphatic acyl peroxides of similar structure and molecular weight. The new compounds, and especially the 3-alkoxyisobutyryl peroxides, are suitable for use as initiators for the polymerization or copolymerization of ethylenic monomers and for the crosslinking of unsaturated polyesters.
IN WHICH R is alkyl containing from one to 14 carbon atoms, and X is hydrogen or methyl are new compounds which resemble common diacyl peroxides in manner of decomposition, but exhibit important differences in chemical and physical properties. The new peroxides are liquids at ambient temperatures and possess a higher degree of thermal stability than the commonly used aliphatic acyl peroxides of similar structure and molecular weight. The new compounds, and especially the 3-alkoxyisobutyryl peroxides, are suitable for use as initiators for the polymerization or copolymerization of ethylenic monomers and for the cross-linking of unsaturated polyesters.
摘要:
1. A PROCESS FOR THE CONTINUOUS PREPARATION OF ALKYLPEROXYDICARBONATES IN SOLUTION FROM SODIUM PEROXIDE AND ALKYLCHLOROFORMATES COMPRISING CONGINUOUSLY CIRCULATING IN A REACTION CHAMBER AN AQUEOUS LIQUID MAINTAINED AT A TEMPERATURE OF AT LEAST -10* C., CONTINUOUSLY INTRODUCING INTO SAID AQUEOUS LIQUID HYDROXIDE, HYDROGEN PEROXIDE IN A STOICHIOMETIC EXCESS OF 10-20%, ALKYLCHLOROFORMATE AND A SOLVENT FOR SAID ALKYLPEROXYDICARBONATE, AT FLOW RATES SUCH THAT THE PJ OF THE AQUEOUS LIQUID IS CONSTANTLY MAINTAINED AT A VALUE WITHIN THE RANGE OF 3 TO 10, WHEREBY THE AMOUNT OF SODIUM HYDROXIDE FORMED IS IN EXCESS OF 10-20% BY WEIGHT OF THE ALKYLFORMATE SODIUM PEROXIDE CHIOMETRIC RATIO OF THE ALKYLFORMATE/SODIUM PEROXIDE, CONTINUOUSLY SEPARATING THE OBTAINED SOLUTION OF ALKYLPEROXYDICARBONATE FROM THE AQUEOUS LIQUID, WASHING SAID SOLUTION WITH WATER, AND SEPARATING THE WASHED SOLUTION OF ALKYLPEROXYDICARBONATE FROM THE WASH WATER.
R IS PHENYL DIRADICAL OR AN ALKYL, ALKYCYCLOALKYL OR PHENALKYL DIRADICAL OR 1-17 CARBONS OPTIONALLY CONTAINING AN -O-, -C(=O)NH- OR -C(=O)OLINKING GROUP IN THE BACKBONE STRUCTURE; R1 AND R3 ARE ALKYL OF 1-10 CARBONS; R2 IS T-ALKYL, T-CYCLOALKYL OR T-ARALKYL OF 4-13 CARBONS; AND R4 IS PHENYL.
摘要:
PEROXY COMPOUNDS ARE PREPARED BY REACTING FREE-OXYGEN, AN ALDEHYDE, AN ORGANIC COMPOUND CONTAINING ACTIVE HALOGEN AND AN ACID ACCEPTOR, UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE BELOW THE DECOMPOSITION TEMPERATURE OF THE DESIRED ACYLPEROXY PRODUCT.