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。
RAPID CURING THIOL EPOXY RESIN WITH IMPROVED COMPRESSION STRENGTH PERFORMANCE
申请人:The Boeing Company
公开号:EP3165561A1
公开(公告)日:2017-05-10
Aspects described herein generally describe epoxy resins and methods of epoxy resin formation. In some embodiments, a resin includes the reaction product of one or more polythiols, one or more polyepoxides, one or more fillers and one or more amine catalysts. Polythiols have between two and about ten thiol moieties. Polyepoxides have between two and about ten epoxy moieties. One or more amine catalysts of the formula NR1R2R3, wherein each of R1, R2, and R3 is independently linear or branched C1-20 alkyl or two or more of R1, R2, and R3 combine to form cycloalkyl. The resin has a compressive strength of at least 14 ksi at 2% offset at 70°F and at least 8 ksi at 2% offset at 190°F.
Rapid curing thiol epoxy resin with improved compression strength performance
申请人:THE BOEING COMPANY
公开号:US10035873B2
公开(公告)日:2018-07-31
Aspects described herein generally describe epoxy resins and methods of epoxy resin formation. In some embodiments, a resin includes the reaction product of one or more polythiols, one or more polyepoxides, one or more fillers and one or more amine catalysts. Polythiols have between two and about ten thiol moieties. Polyepoxides have between two and about ten epoxy moieties. One or more amine catalysts of the formula NR1R2R3, wherein each of R1, R2, and R3 is independently linear or branched C1-20 alkyl or two or more of R1, R2, and R3 combine to form cycloalkyl. The resin has a compressive strength of at least 14 ksi at 2% offset at 70° F. and at least 8 ksi at 2% offset at 190° F.
Amine polymer and preparation method and use thereof
申请人:CHINA PETROLEUM & CHEMICAL CORPORATION
公开号:US10968313B2
公开(公告)日:2021-04-06
The present invention relates to an amino polymer, its main chain is attached via a —O— group to a structure represented by the following formula (I). The present invention also relates to a process for producing said amino polymer and to its use as fuel oil detergent. Compared with the prior art, the fuel oil detergent of the present invention has the advantages such as a lower manufacturing cost and an improved deposit formation inhibition performance.
In formula (I), groups and values are defined as described in the description.
High cis-1,4 block copolymers of polybutadiene and polyisoprene
申请人:Bridgestone Corporation
公开号:US11230622B2
公开(公告)日:2022-01-25
A vulcanizable composition comprising rubber component, a filler, and a curing agent, where the rubber component includes a block copolymer of polybutadiene and polyisoprene, and where the block copolymer has a cis content of at least 90%.