摘要:
The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic acid is more than 0 ppm and not more than 1,000 ppm relative to the dicarboxylic acid, and a pKa value of the organic acid at 25° C. is not more than 3.7.
摘要:
The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic acid is more than 0 ppm and not more than 1,000 ppm relative to the dicarboxylic acid, and a pKa value of the organic acid at 25° C. is not more than 3.7.
摘要:
The invention provides a mixture comprising diacetyl tartaric acid esters on mono- and diglycerides based on C12 to C22 fatty acids which mixture comprises diacetyl tartaric acid glycerol monoesters containing: (A) one fatty acid group, one diacetylated tartaric acid monoester group and a free hydroxyl group and (B) one fatty acid group and two diacetylated tartaric acid monoester groups in which the molar percentages of (A) and (B) obtained by a specific NMR-technique which satisfies certain defined parameters. Preferably this mixture is based on mono- and diglycerides of substantially saturated C16 and/or C18 fatty acids. The invention further provides processes for preparing the mixture defined above and the use thereof as emulsifier, dough conditioner, in flour and in bakery improvers for yeast-leavened baked products. Also the invention provides baked products in which the mixture defined above has been incorporated.
摘要:
A monomeric diacid derivative includes at least two fatty acids coupled by hydrolytically or enzymatically degradable bond. In a biological environment, the bond degrades forming naturally occurring fatty acid products thereby allowing elimination.
摘要:
The subject matter of the invention is a process for the production of metal salts of trifluoromethane sulphonic acid by reacting trifluoromethane sulphonic acid with a metal alcoholate and the use thereof as esterification catalyst and/or transesterification catalyst for the production of hydroxycarboxylic acid esters.
摘要:
The present invention provides an oil agent having water solubility and oil solubility, as well as suppressed stickiness when applied to skin to exhibit excellent feeling of use, and also provides a lubricating agent, a moisturizing agent and an external preparation containing said oil agent.The oil agent of the present invention comprises a dibasic acid ester compound of general formula I: wherein R1 is an alkylene group having a carbon number of 2-4, which may be mono- or poly substituted, R2 and R3 are, independently of each other, an alkyl group having a carbon number of 1-4, which may be mono- or poly substituted, n and m are, independently of each other, an integer of 0-4 with m+n≧1 (provided that the cases wherein both of R2 and R3 are an ethyl group and both of n and m are 1 are excluded).
摘要:
The present invention relates to the use of nanosized metal particles (e.g., ruthenium) grafted on inert solid support for oxidation of alkenes. The supported metal catalyst can effect cis-dihydroxylation and oxidative cleavage of alkenes to give the respective cis-diols and carbonyl products.