24 results about "Allyl compound" patented technology

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-strength bismaleimide resin material and a preparation method thereof. The bismaleimide resin composition comprises the following components in parts by weight: 50-60 parts of bismaleimide resin, 40-50 parts of an allyl compound, 1-3 parts of modified graphene and 0.1-0.5 part of a dispersing filler, the dispersing filler is prepared from modified inorganic nanoparticles and modified tetrapod-like zinc oxide whiskers in a mass ratio of (0.1-1): 1. Wherein the tetrapod-like zinc oxide whiskers can promote the dispersion of the graphene with a large lamellar structure from the macroscopic aspect, so that the graphene is uniformly dispersed in a bismaleimide resin matrix, and the inorganic nanoparticles can play a role in lubrication and isolation, so that the agglomeration among graphene lamellas in a small range is prevented. By adding the graphene composite reinforcing filler, the rigidity of the bismaleimide resin material is improved, and the toughness of the composite material can be improved at the same time.

The invention relates to the technical field of conductive silver adhesives, in particular to a high-shear-strength conductive silver adhesive and a preparation method thereof.The high-shear-strength conductive silver adhesive is prepared from, by weight, 40-70 parts of conductive silver powder, 10-30 parts of epoxy resin, 2-10 parts of modified liquid resin, 3-10 parts of reactive diluent and 4-8 parts of curing agent. The liquid resin is modified by introducing the silallyl compound containing Schiff base, and the proportion of each component is accurately regulated and controlled, so that the conductive silver adhesive with high shear strength and excellent conductivity is successfully prepared, and the conductive silver adhesive has a wide application prospect in the field of high-end electronic packaging.

The invention relates to the technical field of composite material preparation and curing molding, in particular to a preparation method of a carbon fiber bismaleimide resin composite material. The method comprises the following steps: curing a carbon fiber bismaleimide resin prepreg under vacuum and pressure conditions, wherein the carbon fiber bismaleimide resin prepreg is prepared from a resin system containing an allyl compound, bismaleimide resin and a thermoplastic toughening agent; the curing procedure comprises the following steps: (1) raising the temperature to 130-150 DEG C and keeping the temperature; (2) continuously raising the temperature to 180 + / -5 DEG C and keeping the temperature; (3) continuously raising the temperature to 200-220 DEG C and keeping the temperature to complete the curing reaction; and cooling and demolding. The structure prepared by the method has relatively good energy dissipation capability when bearing an impact load, so that the damage expansion trend of the material is effectively controlled, and a relatively small damage area after impact is shown.

This invention discloses a high-toughness, low-dielectric bismaleimide resin composition, a modified bismaleimide resin, its preparation method, and its applications. The bismaleimide resin composition comprises bismaleimide resin, an allyl compound, and a liquid rubber, wherein the liquid rubber contains end-capping groups capable of reacting with double bonds. This invention primarily addresses the problems of high dielectric constant, poor toughness, and poor interlaminar shear strength in existing bismaleimide resins. In this invention, the dielectric properties and toughness are improved by reacting the end-capping groups in the liquid rubber with the bismaleimide resin, while maintaining the mechanical properties and heat resistance essentially unchanged.

The application belongs to the technical field of compound preparation, and discloses a preparation method of (1'S, 2'S)-eugenol glycerol 3'-O-beta-D-glucopyranoside. The method is characterized in that: a phenolic hydroxyl group allyl compound protected by a benzyl group is subjected to O-glycosylation reaction with a D-glucopyranosyl donor protected by an acetyl group, so as to obtain an olefin type protected glycoside intermediate which retains a side chain carbon-carbon double bond; then, asymmetric dihydroxylation reaction is performed on the intermediate, so as to construct a target vicinal diol chiral structure; finally, the acetyl protecting group of the sugar hydroxyl group and the benzyl protecting group of the phenolic hydroxyl group are sequentially removed, so as to obtain the target compound. The preparation method of (1'S, 2'S)-eugenol glycerol 3'-O-beta-D-glucopyranoside is characterized in that: the glycoside bond is constructed before dihydroxylation, which is beneficial to reducing the competition reaction of multiple hydroxyl groups and realizing the preparation of the target compound.

The application provides a photosensitive resin composition, a resist ink, a resist laminated body and application thereof. The photosensitive resin composition comprises, in parts by weight, 50-70 parts of an alkali-soluble resin, 30-50 parts of a photopolymerizable monomer and 0.1-4.0 parts of a photoinitiator; wherein the photopolymerizable monomer comprises an allyl compound and a mercapto compound, and the mass content of the mercapto compound in the photopolymerizable monomer is 7wt%-22wt%. The application introduces the allyl compound and the mercapto compound into the photosensitive resin composition, the alkyl group in the allyl compound can add polymerize with the mercapto group in the mercapto compound, which helps to make the prepared photosensitive resin have relatively uniform crosslinking after exposure, and obtain a photosensitive resin with low polymerization shrinkage stress, which shows good adhesion in the bonding process of a copper substrate.

The application belongs to the technical field of polymer composite materials, and particularly relates to a high-strength bismaleimide resin material and a preparation method thereof. The bismaleimide resin material comprises the following components in parts by weight: bismaleimide resin 50-60 parts, allyl compound 40-50 parts, modified graphene 1-3 parts, and dispersed filler 0.1-0.5 parts. The dispersed filler is composed of modified inorganic nanoparticles and modified four-needle-shaped zinc oxide whiskers in a mass ratio of (0.1-1):1. The four-needle-shaped zinc oxide whiskers can promote the dispersion of graphene with a large lamellar structure from a macroscopic perspective, so that the graphene is uniformly dispersed in the bismaleimide resin matrix. The inorganic nanoparticles can play a lubricating and isolating role to prevent the agglomeration between graphene lamellar layers in a small range. The addition of the graphene composite reinforcing filler can improve the rigidity of the bismaleimide resin material and also improve the toughness of the composite material.

To provide a solid-supported ruthenium complex useful as a catalyst for producing allyl compounds, a method for producing the same, and a method for producing an allyl compound using the same.SOLUTION: The solid-supported ruthenium complex is represented by General Formula (1), and an allyl compound is produced using the solid-supported ruthenium complex as a catalyst.SELECTED DRAWING: None

The invention belongs to the technical field of polymer composite materials, and particularly relates to a modified environment-friendly bismaleimide resin material and a preparation method thereof. The resin material comprises the following components: bismaleimide resin, an allyl compound, and amino modified carbon nanotubes and amino modified tetrapod-like zinc oxide whiskers in a mass ratio of 1: (0.01-0.1). The amino-modified tetrapod-like zinc oxide whiskers and the amino-modified carbon nanotubes are compounded, and the tetrapod-like whisker structure can be mutually entangled with the carbon nanotubes with one-dimensional linear structures, so that the dispersion of the carbon nanotubes is promoted, and the problem that the carbon nanotubes with the one-dimensional linear structures are easy to agglomerate is solved. In addition, the amino-modified tetrapod-like crystal whisker shows better stress transfer and dissipation capacity than common one-dimensional crystal whiskers, the rigidity of the composite material is improved, the toughness of the composite material can be improved, and the amino-modified tetrapod-like crystal whisker is wide in application and can be used as a base material for non-metal additive materials.

The invention discloses semi-cured modified bismaleimide varnished cloth for a voice coil framework and a preparation method of the semi-cured modified bismaleimide varnished cloth. The varnished cloth disclosed by the invention is obtained by dipping fiber cloth in a modified bismaleimide resin glue solution and then drying until the fiber cloth is semi-cured, the B-order resin content of the varnished cloth is not less than 25%, and the volatile matter content is not more than 1.5%; the modified bismaleimide resin glue solution is prepared by reacting a component A and a component B; the component A is a prepolymer solution with the solid content of 40-60%, which is obtained by reacting bismaleimide resin, an allyl compound and aromatic diamine as reactants in a polar aprotic solvent; the component B is a polyamide acid solution of which the viscosity is less than or equal to 4000 centipoises; and the use amount of the component B is 1-10wt% of the total weight of reactants in the component A by controlling the added polyamide acid. The varnished cloth has ketone solubility and can be directly used as a voice coil framework for winding, and copper wires can be bonded and fixed through acetone during winding.

The invention discloses a microcapsule type curing agent as well as a preparation method and application thereof, and belongs to the technical field of epoxy resin curing. The microcapsule type curing agent comprises a microcapsule shell and a microcapsule core, the microcapsule core is an imidazole curing agent, and the microcapsule shell is obtained by a thiol-ene click reaction of an allyl compound and a thiol compound. According to the present invention, the sulfydryl-alkene click reaction has characteristics of high selectivity and high efficiency, such that the allyl compound and the sulfydryl compound can rapidly form the cross-linked shell layer during the reaction so as to rapidly coat the imidazole curing agent so as to improve the coating rate; moreover, the allyl compound and the sulfhydryl compound react to form a compact three-dimensional network, so that the strength and compactness of the microcapsule shell are improved, and the dispersion stability of the curing agent in the epoxy resin and the final curing performance are improved.

The present disclosure relates to a novel thermosetting resin composition used for forming an insulating film applied to hybrid bonding.SOLUTION: A thermosetting resin composition for hybrid bonding, comprising a maleimide compound having a maleimide group represented by formula (I): and a reactive component other than the maleimide compound. The reactive component includes an allyl compound having an allyl group.SELECTED DRAWING: Figure 3

The invention relates to the technical field of high polymer materials, and particularly discloses a preparation method and application of high-temperature-resistant hot-melt bismaleimide resin. The resin system comprises a bismaleimide monomer, an allyl compound and a special norbornene reactive diluent. The diluent is prepared from norbornene dianhydride and aromatic diamine through a condensation reaction, and the diluent is crushed into micron-sized powder. In the preparation process, the diluent powder is mixed with bismaleimide resin and other components, and the resin meets the hot melting method prepreg preparation technological process. During heating and curing, the diluent powder is molten, so that the melt viscosity of a resin system is remarkably reduced, and the process operability is improved; then, an active end group in the diluent is copolymerized with bismaleimide resin to form a compact cross-linked network, so that small molecule volatile matters are eliminated, and the glass-transition temperature and the thermal decomposition temperature of a cured product are remarkably improved. The method is simple in process and suitable for manufacturing high-performance composite materials in the aerospace field.

This invention discloses a bismaleimide resin system, its preparation method, and its applications. The bismaleimide resin system comprises bismaleimide resin, an allyl compound, a polysulfone resin, a polyetheretherketone resin, and hydroxylated MXene. The polysulfone resin, polyetheretherketone resin, and hydroxylated MXene constitute a multi-level synergistic crack-resistant system of rigid particles and flexible toughening components. This invention, through the multi-level synergistic crack-resistant effect of the rigid hydroxylated MXene particles and the flexible toughening components of polysulfone and polyetheretherketone, imparts high toughness to the bismaleimide resin system while maintaining suitable viscosity, thus achieving excellent lay-up processability and impact resistance.

Provided are an allyl polymer that has excellent fluidity, a thermosetting resin composition that uses the allyl polymer, a cured product, and a molded article. The present invention relates to an allyl polymer that is obtained by polymerizing an allyl compound represented by formula (1) and an allyl compound represented by formula (2), the value of the amount (mol%) of constituent units based on the allyl compound represented by formula (1) / the amount (mol%) of constituent units based on the allyl compound represented by formula (2) being at least 0.5. (1) X-(COOCH2CH=CH2)n (in which n is an integer from 2 to 4, inclusive, and X is a n-valent aromatic hydrocarbon group that may include an alkyl group). (2) Y-(COOCH2CH=CH2)n (in which n is an integer from 2 to 4, inclusive, and Y is a n-valent alicyclic hydrocarbon group that may include an alkyl group).

The invention discloses a marine high-temperature-resistant composite material based on bismaleimide-cyanate resin and a preparation method of the marine high-temperature-resistant composite material. The marine high-temperature-resistant composite material is formed by a prepreg formed by compounding bismaleimide / cyanate / allyl compound copolymer resin and glass fibers through an autoclave stepped heating and curing process, diallyl bisphenol A is introduced to be subjected to ternary polymerization with bismaleimide and bisphenol A dicyanate to form an interpenetrating network structure, so that the composite material is completely cured to obtain excellent comprehensive performance; allyl functionalized nano silicon dioxide filler is also added, and allyl on the surface of the nano silicon dioxide filler can participate in a polymerization reaction of resin and has good compatibility with a resin system, so that the heat resistance and the mechanical property of the system can be improved on the premise of not remarkably influencing the process viscosity.

This invention proposes the application of allyl compounds containing leaving groups as end-capping agents, relating to the field of polymer materials applications. Specifically, it involves using allyl compounds containing leaving groups as end-capping agents for the metathesis polymerization of ring-opening olefins; initiating the polymerization of ring-opening olefin monomers using a Grubbs-type catalyst, resulting in the polymerization product being end-capped with an active ruthenium carbene terminus; and then using the allyl compound containing leaving groups as the end-capping agent, reacting with the active ruthenium carbene terminus in an organic base, N... 2 The end-capping reaction is carried out in an atmosphere and organic solvent to obtain a polymer containing conjugated diene ends. This end-capping agent has high end-capping efficiency, rapid reaction, mild reaction conditions, is commercially available and requires no additional processing, and is low in cost.

This invention relates to a mud-inhibiting polycarboxylate superplasticizer and its preparation method. The raw materials for preparing the mud-inhibiting polycarboxylate superplasticizer, by weight, include: 90-260 parts of allyl-terminated polyether monomer; 20-32 parts of unsaturated acid monomer; 8-15 parts of unsaturated ester monomer; 4-8 parts of quaternary ammonium salt compound; 1.5-3.0 parts of oxidant; 0.2-0.4 parts of reducing agent; 0.8-1.5 parts of chain transfer agent; and water. The allyl-terminated polyether monomer comprises unsaturated alcohol, allyl compound, and alkaline catalyst. The polycarboxylate superplasticizer prepared by the method of this invention has advantages such as low dosage, high water reduction, good workability, low dosage sensitivity, and excellent mud inhibition, significantly improving the dispersion and adsorption performance of concrete and having a wide adaptability range for the mud content of sand and gravel.

The invention relates to a preparation method of a low-thermal-expansion-coefficient bismaleimide resin-based light synthetic core material adhesive film, and belongs to the field of low-thermal-expansion-coefficient bismaleimide resin-based light synthetic core materials, and the specific scheme comprises the following steps: step 1, pre-polymerizing an allyl compound and bismaleimide resin to obtain pre-polymerized resin A; step 2, uniformly dispersing epoxy resin, a curing agent, a flexibilizer and the surface-functionalized boron nitride nanotube to obtain ground blended resin B; step 3, performing vacuum kneading on the prepolymerized resin A, the ground blended resin B and the zirconium tungstate loaded hollow silicon dioxide to obtain a sizing material for the light synthetic core material adhesive film; and 4, calendaring the rubber material to form a film, and compounding the film with a carrier to obtain the uncured bismaleimide resin-based light synthetic core material rubber film with the low thermal expansion coefficient. The problems of high thermal expansion coefficient, high density, large thermal stress and the like of a bismaleimide resin-based light synthetic core material adhesive film in the prior art are solved.

The present application relates to a kind of viscosity-reducing polycarboxylic water-reducing agent and its preparation method, the viscosity-reducing polycarboxylic water-reducing agent includes by weight parts: allyl end-capped polyether monomer 180-300 parts;Crosslinking monomer 3-9 parts;Unsaturated acid monomer 20-32 parts;Unsaturated ester monomer 8-15 parts;Quaternary ammonium salt compound 4-8 parts;Oxidizing agent 1.5-3.0 parts;Reducing agent 0.2-0.4 parts and water;Wherein, allyl end-capped polyether monomer is prepared by the reaction of unsaturated end olefin monomer and allyl compound under the catalysis of alkaline catalyst.The present application introduces allyl end-capped polyether monomer in viscosity-reducing polycarboxylic water-reducing agent, enhances the steric hindrance effect of water-reducing agent while reducing the branch density of polycarboxylic water-reducing agent molecule, and the molecular chain is more flexible, which helps to maintain the fluidity of concrete, delays slump loss.

The invention discloses a fiber-reinforced resin-based prepreg as well as a preparation method and application thereof. A large number of experimental studies find that a part of bismaleimide resin and a polyfunctional group allyl compound are subjected to a prepolymerization reaction to prepare a prepolymer, and then the prepolymer is mixed with another bismaleimide resin and an allyl compound, so that liquid components in the resin can be effectively prevented from settling when the prepreg is stored; therefore, the storage period of the prepreg is prolonged, and the preparation of a stable prepreg resin matrix is facilitated. In addition, the heat resistance of the prepreg can be improved while the manufacturability of the prepreg is ensured.

The application discloses a high allylamine compound, and relates to a one-step synthesis of a series of high allyl compounds with application prospects by using an air-stable allyl potassium trifluoroborate reagent as an allylation reagent, selecting cheap and readily available rose Bengal as a catalyst, and irradiating with a commercially available visible light LED light source. The synthesis method has the advantages of short steps, simple operation, mild conditions, wide substrate range, no participation of additives and metals, and environmental friendliness.

The application discloses a selective oxidation method of benzyl compounds and allyl compounds. The method uses benzyl compounds and allyl compounds as raw materials, halogenated alkane as a catalytic reagent, acetonitrile as a reaction solvent, air as a molecular oxygen source, and performs a reaction under light conditions to selectively oxidize to generate benzyl ketone compounds and allyl compounds. The method has the advantages of high reaction efficiency, mild reaction conditions, convenient operation, economy and greenness, and is suitable for large-scale production.

The invention relates to a tandem cyclization reaction of photocatalytic diallyl compounds. The invention relates to a photocatalytic cascade cyclization reaction of diallyl compounds, which comprises the following steps: mixing a diallyl compound and a thiosulfonate compound in a solvent, and stirring to react under the conditions of visible light irradiation and room temperature to obtain a bifunctional cyclization product; the diallyl compound is diallyl diethyl malonate or diallyl diphenyl silane, and the diallyl compound is diallyl diethyl malonate or diallyl diphenyl silane. According to the series cyclization reaction of the photocatalytic diallyl compound, the cyclization reaction without participation of a photocatalyst and an additive is completed through visible light induction on the basis of the diallyl compound, and a novel efficient, simple, convenient and environment-friendly bifunctional cyclization strategy is established; regioselective functionalization reaction is completed through different diallyl compounds, generation of by-products is greatly reduced, the yield of target products is improved, and expansibility is improved through wide thiosulfonate substrates.