165 results about "Aldimine" patented technology

Fast-curing modified siloxane compositions comprise; (1) an alkoxy- or silanol-functional silicone intermediate, (2) at least one amine reactive ingredient selected from the group consisting of acetoacetate-functional ingredients, acrylate-functional ingredients, and mixtures thereof, (3) an epoxy-functional ingredient, (4) a curing agent selected from the group consisting of amines, aminosilanes, ketimines, aldimines and mixtures thereof, and (5) water. Other ingredients useful in forming fast-curing modified siloxane compositions of this invention include silanes, organometallic catalysts, solvents, pigments, fillers and modifying agents. The above-identified ingredients are combined and reacted to form a fully cured protective film comprising a cross-linked enamine polysiloxane and/or acrylate polysiloxane chemical structure in a reduced amount of time when compared to conventional epoxy siloxane compositions.

Disclosed are one-component low temperature, moisture curable, storage stable coating compositions that include a silanol-functional silicone; an alkoxy-functional silicone; a flexibilizer comprising a reaction product of two or more reactants; and a curing agent selected from amines, aminosilanes, ketimines, aldimines, and combinations thereof. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and methods for coating substrates with such compositions.

The invention belongs to the technical field of functional materials and particularly relates to covalent organic frame magnetic composite microspheres of core-shell structure and a preparation method of microspheres. Cores of the core-shell type composite microspheres are ferroferric oxide magnetic particles, and shells are covalent organic frames of ordered porous structures. The preparation method includes the steps that the ferroferric oxide magnetic particles are prepared through the solvothermal method; core-shell type magnetic composite microspheres are obtained through aldimine condensation reaction; under the solvothermal condition, the core-shell type magnetic composite microspheres in a formless and disordered channel state are induced to be converted into highly crystallized covalent organic frames with ordered channels, and the covalent organic frame magnetic composite microspheres with the excellent porous property are obtained. The composite microspheres have the advantages of being uniform in size, high in dispersity, high in mangnetic responsiveness, high and ordered in porosity and the like. The preparation method is simple, the process is controllable, and the size and the appearance of the composite microspheres are kept unchanged. The composite microspheres and the preparation method have wide application prospects in the fields of catalysis, drug loading, molecular sensing, energy storage and the like.

The invention relates to a novel poly(ethylene oxide)imine; a novel amine reactive moiety; a novel moisture activated latent curing adhesive or sealant mixture comprising (1) a ketimine or aldimine, and (2) an amine reactive moiety; and a novel moisture activated latent curing adhesive or sealant comprising the reaction product of (1) and (2).

The invention provides a reactive polyurethane hot melt adhesive for a household appliance and a preparation method of the reactive polyurethane hot melt adhesive. The reactive polyurethane hot melt adhesive for the household appliance is prepared from the following raw materials: 100-250 parts by weight of polyester polyol, 1-150 parts by weight of polyether polyol, 50-100 parts by weight of isocyanate, 70-150 parts by weight of tackifying resin, 1-10 parts by weight of a latent curing agent 1, 1-5 parts by weight of an antioxygen, 5-10 parts by weight of a coupler, and 0.01-0.1 part by weight of a catalyst; the polyester polyol comprises crystalline polyester polyol and amorphous form polyester polyol at the mass ratio of 1:(0.25-1.5); and the latent curing agent is an aldimine latent curing agent or a di-zolidine latent curing agent. Compared with the prior art, the provided reactive polyurethane hot melt adhesive for the household appliance adopts the components with the specific contents, the better interaction is achieved, no bubble is produced in the curing process of the obtained product, and the reactive polyurethane hot melt adhesive is excellent in adhesive property, water resistance and chemical resistance.

The invention relates to compositions comprising at least one polyurethane prepolymer A with isocyanate terminal groups and at least one polyaldimine B. The polyurethane prepolymer A is produced from at least one polyol A1, optionally at least one polyol A2, in addition to polyisocyanates. The polyol A1 is a linear polyoxyalkylene polyol and has a degree of unsaturation of <0.04 mEq/g and the polyol A2 is present in a quantity of between 0 and 30 wt %, preferably between 0 and 20 wt % and in particular between 0 and 10 wt. %, in relation to the total quantity of A1+A2. In addition to the aforementioned components, a composition according to a preferred embodiment can also contain one or more of the following components: plasticizers, solvents, fillers, pigments, catalysts, rheology modifiers such as e.g. thickeners, coupling agents, dehydrators, antioxidants, light-protection agents and other conventional additives in the polyurethane industry.

The present invention relates to laminates of a plasticizer-containing plastic, obtained by bonding by means of a moisture-reactive hot-melt adhesive which comprises at least one aldimine and at least one polyurethane polymer which contains isocyanate groups and is solid at room temperature. The bonded assembly is notable for improved adhesive, particularly following heat/moisture storage or alternating storage. Preferred embodiments of such laminates are bonded films or film-laminated supports, the film preferably being a pPVC film.

The invention relates to a two-constituent composition, wherein the first constituent (A) contains at least one polyurethane prepolymer which has isocyanate end groups and is produced from at least one aromatic polyisocyanate and at least one polyol, and at least one polyaldimine which can be obtained from at least one polyamine having aliphatic primary amino groups and at least one aldehyde which, in position α in relation to the carbonyl group, does not have any C—H groups. The second constituent (B) contains water which is bound to a carrier material. The inventive composition is characterised in that it exhibits a high early strength, and hardens quickly, thus not forming any bubbles.

Capped amine hardeners for epoxy resins, which are reaction products of amines A having at least two primary amino groups, cyclic alkylene carbonates B, aliphatic carbonyl compounds C and compounds D having at least two groups which react with hydroxyl groups, such that in the first step, 0.1 to 1 mol of the primary amino groups for each 1 mol of the amine A are converted to hydroxyalkylurethane groups by reaction with the cyclic alkylene carbonate B, and the remaining primary amino groups are converted by reaction with the aliphatic carbonyl compound C in a second step to give ketimine or aldimine groups, and finally in the third step at least two of the molecules formed from A, B, and C are linked through reaction of the hydroxyl groups of the hydroxyalkylurethane groups with compound D. These capped amine hardeners are suitable for formulating water-dilutable monocomponent epoxy resin systems. The amines are released by addition of water, and are available for the curing reaction with the epoxy groups. Coatings formulated on the basis of this system are characterized by a very low content of auxiliary solvent. The cured coating films show outstanding leveling and film properties.

Disclosed are one-component low temperature, moisture curable, storage stable coating compositions that include a silanol-functional silicone; an alkoxy-functional silicone; a flexibilizer comprising a reaction product of two or more reactants; and a curing agent selected from amines, aminosilanes, ketimines, aldimines, and combinations thereof. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and methods for coating substrates with such compositions.

The present invention relates to aldimines of the formula (I) which have at least one hydroxyl group, and to curable compositions comprising these aldimines. The aldimines can be prepared in a simple manner and are widely usable. The aldehydes formed in the hydrolysis can be incorporated into a polymer via the hydroxyl groups and have tertiary amino groups which can act catalytically.

The invention relates to a method for preparing a cold-recycling asphalt emulsification additive. The method comprises the following steps of: (1) adding polyamine to aldehyde solution, and carrying out reaction so as to produce aldimine solution; (2) cooling down, and reacting produced aldimine with alkylphenol so as to produce mannich base solution; and (3) adding an epoxy ethane derivative, and carrying out reaction, thereby obtaining the cold-recycling asphalt emulsification additive. The method has the advantages that the synthesis process is simple, the reaction conditions are mild, the yield is high, and the industrialization is easily realized. The emulsifying property and normal-temperature storage stability of emulsified asphalt prepared through the cold-recycling asphalt emulsification additive are good; and a cold-recycling asphalt mixture prepared from the emulsified asphalt is better in road performance, various strengths are obviously increased, and various other properties all meet the cationic emulsified asphalt standard established by the Ministry of Communications and the technical indicator on mixing performance.

The invention relates to a salicyldenaminato schiff base metal complex catalyst and a preparation method thereof. The catalyst comprises the following components: (A) a salicyldenaminato schiff base ligand, (B) a transition metal compound which can be coordinated with the salicyldenaminato schiff base ligand, and (C) alkali metal or alkaline-earth metal salt. The catalyst is used for catalyzing self-polymerization of diisocyanate in order to prepare a polyisocyanate curing agent, the problem of higher content of high polymers in the curing agent which is prepared by a direct synthesis method is solved, and at the same time products with excellent molecular weight distribution are obtained, and free monomers in the products are lower than 0.3wt%.

The invention relates to a preparation method of a phenolic emulsifier. The preparation method has advantages of simple synthesis technology, mild reaction condition and high yield, and is easy to realize industrialization. The invention also relates to emulsified bitumen emulsified by the phenolic emulsifier obtained by the above preparation method and an application thereof. The preparation method of the phenolic emulsifier contains the following steps of: performing a reaction between polyamines and aldehyde to generate aldimine, adding alkylphenol, performing a reaction to generate Mannich base, and acquiring the phenolic emulsifier, wherein the mol ratio of alkylphenol to aldehyde to polyamines is 1: (1-1.5): (1-1.5); alkylphenol is a compound as shown in the structural formula II; aldehyde is a compound as shown in the structural formula III; and polyamines is a compound as shown in the structural formula IV. The preparation method has advantages of simple synthesis technology, mild reaction condition and high yield, and is easy to realize industrialization. The emulsifier obtained by the preparation method has good emulsifying property. Each performance of the prepared emulsified bitumen meets the cationic emulsified bitumen standard and agitation performance technical indexes which are set by the Ministry of Communications.

The present invention provides a method for producing asymmetrical mono-substituted alkylated compounds of α-amino acids that are represented by a specific formula, using an aldimine-type Schiff base. In the method of the present invention, the process of alkylating an aldimine-type Schiff base in a medium in the presence of an optically-active quaternary ammonium salt phase-transfer catalyst and an inorganic base is initiated, and subsequently the reaction is quenched at a time earlier than a time for completion of the stoichiometric reaction of the alkylation reaction, so that a mono-substituted alkylated product with high optical purity can be obtained.

The invention relates to a coating composition comprising: a) at least one alkyd binder with an oil content of at least 45 wt % and at most 85 wt %, a modified alkyd binder, or a combination thereof; b) at least one amine or imine component selected from the group comprising: polyaspartic acids and esters thereof, (meth)acrylate/aspartate amines, aldimines, ketimines, and combinations thereof; and c) at least one isocyanate compound.

The present invention relates to a two-component composition comprising a polymer-polyol, optionally further polyols, an aldimine of the formula (I), a zirconium (IV) catalyst and, in the second component, diphenylmethane diisocyanate. The composition is particularly suitable as a solvent-free, low-odor elastic adhesive. The composition has a particularly long open time, a low density and a high level of final strength and cures quickly and without complications.

The invention relates to a polymerization catalyst of tridentate salicylaldehyde imine vanadium alkene, a preparation method thereof and an application thereof. By the catalysis of formic acid, condensation reaction is carried out between the derivatives salicylaldehyde or salicylaldehyde, and amine compounds in methanol solution to obtain Schiff base; under the condition of no water and no oxygen, the Schiff base strips hydrogen protons and complexation reaction is carried out with vanadium trichloride to obtain the polymerization catalyst of tridentate salicylaldehyde imine vanadium alkene; by the action of aluminium diethyl monochloride, the polymerization catalyst is applied to catalyzing ethylene for polymerization; and by the action of aluminium diethyl monochloride, the polymerization catalyst is applied to the copolymerization of ethylene and 1-hexylene at 25 DEG C and used for catalyzing the copolymerization of ethylene and norbornene at the temperature of 50 DEG C. The polymerization catalyst has the advantages of convenient preparation, high catalytic activity, good heat stability, strong copolymerization capacity, etc.

The invention discloses a heparin affinity column as well as the preparation method and the application thereof. The heparin affinity column is prepared through the following method: agarose gel 6FF is taken as a solid phase carrier which is firstly activated and then is aminated and coupled with amidocyanogen after an epoxy group is coupled, the aminated agarose gel 6FF and the heparin form intermediate aldimine in methanol, and the intermediate product of aldimine is further subjected to reductive amination for forming stable chemical bonds, thereby acquiring the heparin-agarose gel 6FF. The affinity column preparing preparation with high efficiency is simple and short. Through adopting the combination of the rear aldehyde of the heparin and the amidocyanogen of aminated sepharose, the activity of the heparin is not influenced, thereby ensuring the affinity column to have higher affinity; the heparin coupling is stable, and the heparin can be repeatedly used; the reagent adopted by the method has low cost and no environmental pollution, thereby laying a foundation for sweepingly isolating and purifying materials with specific binding capacity to the heparin in common laboratories, and promoting the research on domestic relative fields.