31results about How to "Lower curing reaction temperature" patented technology

The invention provides a high-temperature resistant halogen-free fire-resistant adhesive used in flexible copper-clad baseplates and a preparation method thereof. The adhesive essentially consists of aromatic amine modified bismaleimide performed polymer, phosphorus epoxy resin, chemigum, phenolic resin, inorganic filler, a curing catalyst and a solvent. The preparation method comprises the stepsthat: first of all, toluene is taken as the solvent; under the reflow temperature of the toluene, aromatic diamine, aniline and bismaleimide polymerize to obtain an aromatic amine modified bismaleimide performed polymer solution which is then added with the phosphorus epoxy resin and then added with the chemigum, the phenolic resin, the inorganic filler, the curing catalyst and the solvent after chemical reaction or physical mixture so as to form the high-temperature resistant halogen-free fire-resistant adhesive which is used for bonding the polyimide film and copper foil of the flexible copper-clad baseplate; the prepared flexible copper-clad baseplate has excellent heat resistance, flame resistance, dimensional stability and comparatively high peeling strength.

A preparation method of an aryl-containing boron thermoplastic phenolic resin. The method is as below: adding a phenolic compound and a divalent metal salt catalyst into a reaction kettle, adding an aldehyde compound by two times, wherein after the first addition, reacting at 50-70 DEG C for 0.5-2 h, and after the second addition, adding an acidic catalyst, heating to a reflux reaction state for reaction, then removing generated water and unreacted phenolic compounds to obtain the thermoplastic phenolic resin; and adding a boronic acid-containing compound into the thermoplastic phenolic resin, then heating to 100-120 DEG C, removing generated water to obtain the aryl-containing boron thermoplastic phenolic resin; or directly mixing the thermoplastic phenolic resin with the boric acid-containing compound in a solvent evenly and drying to obtain the aryl-containing boron thermoplastic phenolic resin. As the added boronic acid-containing compound contains aryl boric acid, the prepared aryl-containing boron thermoplastic phenolic resin has low water absorption rate and low curing temperature, not only has excellent thermal properties but also shows superior processing and mechanical properties.

The invention relates to the field of epoxy resin production, and particularly discloses an elastic epoxy resin curing system and a preparing method thereof. The elastic epoxy resin curing system is characterized by being prepared from, by weight, 50-60 parts of E-51 epoxy resin, 15-20 parts of E-03 epoxy resin, 15-20 parts of novolac epoxy resin, 5-7 parts of imidazole latent curing agent and 2-3 parts of organic urea accelerant. The elastic epoxy resin curing system is simple in fat method, easy to operate, high in scientificity and suitable for industrial production, the curing aim of the epoxy resin system at the different temperatures can be achieved, the good technology processing performance which is moderate in viscosity and long in service life is achieved, and the mechanical performance of the cured epoxy resin is also quite good.

The invention relates to a high-toughness flame-retardant type medium and low-temperature curing epoxy resin system and a preparation method thereof. Composed of epoxy resin and acid anhydride curing agent. This hyperbranched silicon-phosphorus-nitrogen synergistic flame retardant contains a variety of flame retardant elements at the same time, and its active terminal primary amine group can directly participate in the curing and crosslinking reaction of epoxy resin, and has good compatibility with the resin matrix , while introducing Si-O-Si flexible chain segments into the epoxy resin, effectively improving the toughness of the resin system. The tertiary amine functional group in the hyperbranched polysilicon phosphate plays a role in promoting the curing of the resin, can promote the reaction between the anhydride curing agent and the epoxy resin, and has a certain catalytic effect on its curing, which can be completed at a lower temperature curing reaction. It has broad application prospects in coatings, textiles, furniture, construction and flame retardancy of thermosetting resins.

An aldehyde-containing benzoxazine intermediate and a preparation method thereof, which are characterized in that (1) 50-180 parts by weight of a solvent is added at a temperature of 4-20°C to 280-30 parts by weight of R-NH and 20-110 parts by weight of formaldehyde The reaction generates the N-dimethylol compound, and the pH value is adjusted between 8-10 with lye, so that the N-dimethylol compound is stable in the solution; (2) adding 20-70 weight of aldehyde-containing phenol derivative The N-dimethylol compound is condensed with the phenolic hydroxyl group and its ortho-position on the benzene ring, and dehydration and ring-closure are performed to form an aldehyde-containing benzoxazine intermediate solution. The solvent was distilled off from this solution under reduced pressure to obtain a yellow aldehyde group-containing benzoxazine intermediate solid.

The invention discloses an ultra-low temperature curing epoxy anticorrosion coating. The ultralow temperature curing epoxy anticorrosion coating is composed of two components A and B. The component A is composed of film-forming resin, auxiliary agent, filler, pigment and deionized Composed of water, the film-forming resin is composed of 25-45 parts of bisphenol F epoxy resin, 20-40 parts of silane-modified epoxy resin, 2-4 parts of the auxiliary agent, and the filler includes nano-silica 15~25 parts and 2~10 parts of lignocellulose, the pigment is 3~5 parts of titanium dioxide, and the deionized water is 10~20 parts; the component B is a curing agent, consisting of 3~10 parts of phenalkamine, B It consists of 2~5 parts of diamine, 2~5 parts of polyamide and 5~10 parts of deionized water. The above formulation system can effectively improve the weather resistance of the coating, prevent cracking, and has the advantages of good anti-corrosion properties and high adhesion. The curing agent used is a mixed curing system with phenalkamine as the main body, which can effectively Accelerate the reaction speed of epoxy resin, reduce the curing reaction temperature and reduce the curing energy consumption.

The invention provides a human body canal cast filler and a preparation method of the human body canal cast filler; and the human body canal cast filler is good in physicochemical performance, strong in acid-base resistance, good in flexibility and stronger in support force. The human body canal cast filler is prepared by the components according to the volume ratio: 100ml of cyclodextrin (CYD)-128 type epoxy resin, 20-24ml of liquid-state nitrile rubber, 35-40ml of polypropylene glycol diglycidyl ether, 15ml of 2, 4, 6-tri-(dimethylamino methyl) phenol (DMP-30), 45ml of modified polyether amine epoxy resin curing agent ZY-1784 and 40-45ml of high-performance epoxy resin toughening modifier (RF-400). The human body canal cast filler is easy in preparation as well as simple and convenient in operation, can be completed by once injection without after-teeming, and can be immediately prepared when injection is not sufficient. The invention has the characteristics of being good in fluidity, low in injection resistance, full in molding, fin and attractive, low in contractibility rate, environment-friendly and the like.