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4 results about "Grubbs' catalyst" patented technology
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Grubbs catalysts are a series of transition metal carbene complexes used as catalysts for olefin metathesis. They are named after Robert H. Grubbs, the chemist who supervised their synthesis. Several generations of the catalyst have been developed. Grubbs catalysts tolerate many functional groups in the alkene substrates, are air-tolerant, and are compatible with a wide range of solvents. For these reasons, Grubbs catalysts have become popular in synthetic organic chemistry. Grubbs, together with Richard R. Schrock and Yves Chauvin, won the Nobel Prize in Chemistry in recognition of their contributions to the development of olefin metathesis.
Method for synthesizing 5'-phosphoniamidate nucleotide prodrug
The present invention relates to a method for synthesizing a phosphoniamidate derivative in a single step or directly through ultrasonic irradiation and portionwise addition of the Hovayda-Grubbs catalyst.
Owner:DONG A UNIV RES FOUND FOR IND ACAD COOP
A modified bamboo-based fiber composite material and its preparation method
This invention discloses a modified bamboo-based fiber composite material and its preparation method. Specifically, it relates to a modified bamboo-based fiber composite material, characterized by comprising the following components in parts by weight: 80-100 parts modified bamboo fiber, 70-90 parts epoxy resin, and 2-5 parts curing agent. The modified bamboo fiber is prepared through the following steps: Step 1: Immersing the bamboo fiber in a 10-15% sodium hydroxide solution at 70°C for 3-6 hours, then washing with water until neutral and drying; Step 2: Immersing the bamboo fiber treated in Step 1 in an aqueous mixture containing 0.6%-1.4% Grubbs catalyst, stirring and soaking for 12-24 hours; Step 3: Mixing the dried bamboo fiber treated in Step 2 with dicyclopentadiene microcapsule powder at a mass ratio of 30-50:1 until homogeneous. The modified bamboo-based fiber composite material prepared by this invention exhibits good mechanical properties.
Owner:浙江华丰纸业科技有限公司
Oxypropylene group-containing glycol ether production method including allyl group-containing impurity isomerization step
[Problem] To easily produce an oxypropylene group-containing glycol ether that substantially contains no allyl group-containing impurity and does not adversely affect a polymerization reaction of a polyether-polysiloxane block copolymer when used as a reaction solvent or a diluent, by easily separating the oxypropylene group-containing glycol ether by distillation or the like in a facility and a reaction process that are industrially relatively easy and simple. [Solution] An oxypropylene group-containing glycol ether production method which includes a step for isomerizing an allyl group-containing impurity contained in an oxypropylene group-containing glycol ether by using a ruthenium carbene complex that is known as a Grubbs catalyst, and preferably further includes a purification step for separating the oxypropylene group-containing glycol ether by using a means such as distillation.
Owner:DOW TORAY CO LTD
Prepolymer, resin composition comprising the same and article made therefrom
A prepolymer and a resin composition containing the prepolymer are provided. The prepolymer is obtained from a prepolymerization reaction of a mixture, the mixture including 100 parts by weight of a compound of Formula (1) and 0.01 to 0.09 part by weight of a Grubbs catalyst. The resin composition may be used to make various articles, including a prepreg, a resin film, a laminate or a printed circuit board, and at least one of the following properties can be improved, including copper foil peeling strength and passive intermodulation.
Owner:ELITE MATERIAL