提出了一种使用均相铑催化通过分子氢作为还原剂对醛类进行还原胺化反应合成叔胺的方法。使用胺/醛比率为4/1时,可以由9种不同的醛和9种不同的仲胺合成叔胺,其选择性高达99%,周转频率(TOF)高达7200 h -1... 反应显示出对醇和酯功能的高耐受性,从而允许形成多功能分子。另外,仲胺也可以通过该合成来制备。对于所有化合物,活性都是通过吸收氢气来确定的。为了增加该过程的可持续性和效率,已经成功地制定了剂量策略。使用确定的反应指标,可以化学计量使用醛和胺,而不会显着降低选择性。
The use of an alkoxylated polytetrahydrofurane of formula
wherein m, m', n, n', p, p' and k are integers in the range of ≥ 1, R1 denotes an unsubstituted linear or branched alkyl radical, R2 denotes -CH2-CH3, and R3 denotes a hydrogen atom or -CH3, as an additive in a fuel for reducing fuel consumption in the operation of an internal combustion engine with this fuel.
POLYISOCYANATE COMPOSITION, COATING COMPOSITION AND COATING SUBSTRATE
申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP3778686A1
公开(公告)日:2021-02-17
A polyisocyanate composition includes a polyisocyanate containing a sulfonic acid anion group in a molecule, a tertiary ammonium cation of an amine compound, and a uretdione dimer and isocyanurate trimer of a diisocyanate monomer,
wherein the tertiary ammonium cation of the amine compound includes a tertiary ammonium cation of one or more amine compounds represented by general formula (1),
a content of the uretdione dimer is 2.0% by mass or more and 20.0% by mass or less with respect to a total mass of the composition, and
a content of a uretdione dimer containing a sulfonic acid anion group in a molecule is 0.15% by mass or less with respect to a total mass of the polyisocyanate containing a sulfonic acid anion group in a molecule, the uretdione dimer and the isocyanurate trimer.
POLYISOCYANATE COMPOSITION, COATING COMPOSITION AND COATING BASE MATERIAL
申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP3878838A1
公开(公告)日:2021-09-15
The present invention provides a polyisocyanate composition comprising a polyisocyanate having a sulfonic acid anion group in its molecule and a tertiary ammonium cation of an amine compound, wherein the tertiary ammonium cation of an amine compound includes a tertiary ammonium cation of at least one amine compound selected from amine compounds represented by the following general formulas (1) and (2), and an amount of the tertiary ammonium cation of the selected amine compound is 70 mol% or more with respect to a total molar amount of the tertiary ammonium cation of all amine compounds in the composition.
The use of a complex ester obtainable by esterification reaction between aliphatic linear or branched C2- to C12-dicarboxylic acids, aliphatic linear or branched polyhydroxy alcohols with 3 to 6 hydroxyl groups, and, as chain stopping agents, aliphatic linear or branched C1- to C30-monocarboxylic acids or aliphatic linear or branched monobasic Ci- to C30-alcohols, as an additive in a fuel.
Use of a mixture of a complex ester with a monocarboxylic acid to reduce friction
申请人:BASF SE
公开号:US10927319B2
公开(公告)日:2021-02-23
The present invention relates to the use of a mixture comprising (I) at least one complex ester obtainable by an esterification reaction between (A) at least one aliphatic linear or branched C2-to C12-dicarboxylic acid, (B) at least one aliphatic linear or branched polyhydroxy alcohol with 3 to 6 hydroxyl groups, and (C) as a chain stopping agent (C1) at least one aliphatic linear or branched C1-to C30-monocarboxylic acid in case of an excess of component (B), or (C2) at least one aliphatic linear or branched monobasic C1-to C30-alcohol in case of an excess of component (A), and (II) at least one aliphatic monocarboxylic acid having from 12 to 30 carbon atoms in a weight ratio of (I):(II) of from 20 to 80:80 to 20 as an additive in a fuel for different purposes.