40results about How to "Can be controlled" patented technology

The invention discloses three types of bio-based epoxy resin with furan ring structures. The structures are represented as a formula I, a formula II and a formula III respectively, and in the formulae, R1, R2 and R3 are independently selected from at least one of CH2, C2H4, C3H6, C4H8, C5H10, C6H12, C7H14, C8H16 and C9H18. The invention further discloses a preparation method of the bio-based epoxy resin. The process is simple, industrial production is facilitated, and a product prepared with the method has excellent mechanical property and heat resistance, has higher glass-transition temperature and heat deflection temperature and can be applied to the fields of paint, adhesives and aerospace.

The invention relates to a furandicarboxylic acid copolyester and a preparation method thereof. The structural formula of the furandicarboxylic acid copolyester is shown in the following formula (1): wherein, x, y and z are all integers ranging from 10 to 90. Its preparation method includes the following steps: (1) mixing dibasic acid or its esterified product, dibasic alcohol and esterification reaction catalyst, and performing esterification reaction under an inert atmosphere to obtain the first intermediate product; wherein, the dibasic acid includes Furandicarboxylic acid, diols including ethylene glycol, 1,4-cyclohexanedimethanol and 2,2,4,4-tetramethyl-1,3-cyclobutanedimethanol; (2) under vacuum Under the condition of vacuum, the first intermediate product is subjected to precondensation reaction to obtain the second intermediate product; (3) under vacuum condition, the second intermediate product is subjected to polycondensation reaction to obtain furandicarboxylic acid copolyester. The preparation method of the present invention is simple, and the obtained furyl dicarboxylic acid copolyester has excellent heat resistance, transparency and mechanical properties at the same time, and can be used to manufacture baby feeding bottles, children's toys, water cups, kitchen supplies, electronic appliances and the like.

The invention relates to a copolyester containing an imide structure and a preparation method thereof, the structural formula of the copolyester containing an imide structure is shown in the following formula (1): wherein, R is at least one of, Both x and y are integers of 1-20, and z is an integer of 20-100. The preparation method of the present invention is simple, and the Tg of the obtained copolyester containing imide structure reaches 95°C-120°C, has excellent heat resistance, transparency and mechanical properties, and can be used to manufacture baby feeding bottles, children's toys, water cups, Kitchen supplies and electronic appliances, etc.

The invention provides an organosilicon benzoxazine resin prepolymer based on eugenol. A preparation method of the prepolymer comprises the following steps: (1) eugenol and a multiple-hydrogen-terminated organosilicone monomer are subjected to an hydrosilation reaction under a catalyst effect, and therefore a eugenol organosilicon compound is obtained; and (2) the eugenol organosilicon compound, a diamine and paraformaldehyde are mixed together, a polymerization reaction is performed under heating conditions, and therefore the organosilicon benzoxazine resin prepolymer based on the eugenol is obtained. The preparation method of the prepolymer is simple, convenient in operation, good in controllability, easy to implement, and suitable for large-scale industrialized production. A polymer prepared from the organosilicon benzoxazine resin prepolymer based on the eugenol has good corrosion resistance, mechanical properties and thermal properties, and has possibility of replacing a current petroleum-based product, and the usage range is wide.

The invention discloses a biobasic flame retardant epoxy resin precursor based on natural flavonoids and its application in the preparation of epoxy resin. The precursor has the following formulas (I) and (II) structure. The present invention also discloses a preparation method of the biobasic flame-retardant epoxy resin precursor, which includes: preparing the biobasic flame-retardant epoxy resin precursor through a one-step reaction of natural flavonoids and epichlorohydrin . The preparation process of the invention is simple, good in controllability, easy to implement, and suitable for large-scale industrial production. The thermosetting epoxy resin obtained after curing the biobasic flame-retardant epoxy resin precursor of the present invention has excellent thermodynamic properties and flame-retardant properties, has the possibility of replacing existing petroleum-based high-end epoxy products, and has a wide range of applications.

The present invention relates to a kind of copolyester based on spiroethylene glycol and its preparation method, goods, the structural formula of the copolyester based on spiroethylene glycol is shown in the following formula (1): wherein, R 1 is the structural unit corresponding to the first component, R 2 To correspond to the structural unit of the second component, x and y are both integers, and the ratio of x to y is 10:1˜1:10. The copolyester of the invention has excellent properties such as strength, modulus, toughness and heat resistance, wide degradation range and controllable speed, and is suitable for preparing packaging materials, medical materials, films, fibers, toys and other products.

The invention discloses a biology-based flame-retardant epoxy resin precursor on the basis of natural phenol monomers. The biology-based flame-retardant epoxy resin precursor is of a structure shown as a following formula (I). A method for preparing the biology-based flame-retardant epoxy resin precursor includes carrying out two-step reaction on the natural phenol monomers, trioxymethylene and epichlorohydrin to obtain the biology-based high-performance flame-retardant epoxy resin precursor on the basis of the natural phenol monomers. The biology-based flame-retardant epoxy resin precursor and the method have the advantages that processes for preparing the biology-based flame-retardant epoxy resin precursor are simple, methods for operating the biology-based flame-retardant epoxy resin precursor are simple and convenient, and the biology-based flame-retardant epoxy resin precursor and the method are good in controllability, easy to implement and applicable to large-scale industrial production; thermoset epoxy resin prepared from the biology-based high-performance flame-retardant epoxy resin precursor on the basis of the natural phenol monomers and amine curing agents is excellentin flame retardance and mechanical property and wide in use range, and existing petroleum-based products can be possibly replaced with the thermoset epoxy resin.

The invention discloses eugenol-based UV (ultraviolet) optical resin monomer and a preparation method and application thereof; eugenol and sulfhydryl alcohol or sulfhydryl phenol are subjected to click reaction under the joint-action of an ultraviolet lamp and a catalyst to obtain eugenol-sulfhydryl alcohol compound or eugenol-sulfhydryl phenol compound; the eugenol-sulfhydryl alcohol compound or eugenol-sulfhydryl phenol compound is subjected to substitution reaction with methacryloyl chloride to obtain the eugenol-based UV optical resin monomer. A polymer prepared with the eugenol-based UV optical resin monomer has good mechanical properties in terms of strength, modulus, and creep resistance, and has, the most importantly, high refractivity and permeability in optical resin application.

The invention discloses a surface conduction electron emission source structure and a manufacturing method of the surface conduction electron emission source structure, and belongs to the technical field of flat panel display manufacturing. The surface conduction electron emission source structure comprises a pair of symmetric device electrodes deposited on a substrate. An electron emission thin film is deposited on the device electrodes, and a nanometer crack is formed in the electron emission thin film. An 8-micrometer-to-20-micrometer electrode gap is formed between the symmetric device electrodes, and a dielectric filling layer and / or protruding dielectric are / is arranged in the electrode gap. The manufacturing method includes the steps that a protrusion is firstly built in the middle of the electrode gap; then a conductive film is manufactured on the protrusion; according to the characteristic that materials of the protrusion are poor in heat conductivity and the difference between the portion, covering the protrusion, of the conductive film and the other portions of the conductive film in geometric position, more joule heat is generated at the portion, covering the protrusion, of the conductive film during power-on forming, and the nanometer crack can be formed at the protrusion. Controllable manufacturing of the nanometer crack in position can be achieved, and the electron field emission efficiency can be improved.

The invention discloses a biology-base flame-retardant epoxy resin precursor based on a natural isoflavone compound. The precursor is of the structure shown in any of formulas (I)-(III) shown in the description. The preparation method comprises the steps that the natural isoflavone compound, malononitrile and epichlorohydrin are prepared through a two-step reaction. The preparation process is simple, and the operation method is simple and convenient to implement, good in controllability, easy to implement and applicable to large-scale industrial production. The biology-base flame-retardant epoxy resin precursor based on the natural isoflavone compound and thermosetting property epoxy resin prepared from an amine curing agent have the excellent flame retardant property and the mechanical property, have the probability of replacing an existing petroleum base product, and are wide in application range.