51 results about "Polyfunctional aziridine" patented technology

The present invention features a multi-layer ink-jet recording medium, suitable for recording images with dye and pigmented inks and thereby providing light-emitting, reflective, glossy, metallic-looking or holographic images, comprising a substrate coated with at least two layers comprising: (a) a first transparent ink-receptive layer comprising a polymeric binder and a cross-linker and optionally having a plasticizer and pigment particles such as alumina and silica coated over the substrate, wherein the cross-linker comprises and azetidinium polymer or a salt thereof, and/or a polyfunctinal aziridine or a salt thereof or a polyfunctional oxazoline or a salt thereof; and (b) a second ink-receptive layer comprising an opaque or semi-opaque coating composition, wherein the opaque or semi-opaque coating composition is capable of accepting a printed image and thereby becoming semi transparent or clearly transparent from application of ink-jet printing ink or similar inks, while presenting a light-emitting, reflective, glossy, metallic-looking or holographic image of high clarity and quality, wherein said first layer is located between said second layer and the substrate in said recording medium and the first and second layers are chemically coupled.

A process for making a stiffened and rigid paper includes preparing a pulp slurry consisting essentially of water, a cellulosic pulp, a crosslinker, and a starch, and optionally a binder; draining the liquid from the pulp slurry to form a web; and drying the web. Alternatively, a process for making a stiffened and rigid paper includes the step of adding at least one crosslinker at one or more locations, such as at the wet-end, dry-end, or at both ends of the papermaking process. Suitable crosslinkers include a glyoxal-containing crosslinker, a gluteraldehyde, a polyfunctional aziridine, a zirconium-containing crosslinker, a titanium-containing crosslinker, and an epichlorohydrin, and mixtures thereof. When a binder is employed, it can be added either in the dry or wet form. Provided is a neutral or alkaline process to produce a paper product having the improved mechanical properties of a laminated product in the Z-direction, without a lamination step.

Self-polymerization of mono-aziridine (or azetidine) and multi-aziridine (or azetidine) containing compounds with vinyl group containing organic acid, such as acrylic acid (AA), 2-methylenesuccinic acid, 2,3-dimethylenesuccinic acid and etc, at ambient temperature results in the new type of cross-linked and linear type copolymers, respectively.

The polymerization of multi-functional aziridine (or azetidine) containing compounds with vinyl group containing organic acid results in the formation of high cross-linked polymers. The self-polymerization takes place at ambient temperature and the resultants, cross-linked polymeric networked materials, are solvent insoluble and potential for adhesive, composite matrix and other applications. These insoluble materials are hydrolyzed in an acidic or basic condition to form the water soluble β-amino acids.

A linear poly(β-aminoester) is obtained from the self-polymerization of vinyl group containing organic acid with mono-aziridine (or azetidine) containing compound at ambient temperature. poly(β-aminoester) is applicable for gene transfer, controlled drug release and other applications. This self-polymerization process offers a convenient route for preparing poly(β-aminoesters).

An adhesive composition comprising an emulsion polymer which comprises a (meth)acrylate copolymer, and acicular silica particles, crosslinked by a polyfunctional aziridine crosslinking agent is described.

Removable, water-whitening resistant pressure sensitive adhesive (PSA) comprising a crosslinked aqueous emulsion polymer comprising (a) at least one hydrophobic monomer; (b) at least about 2 wt. % of at least one hydrophilic monomer; and (c) at least about 5 wt. % of at least one partially hydrophilic monomer; wherein the crosslinked aqueous emulsion polymer is crosslinked with an effective amount of at least one polyfunctional aziridine crosslinker, and the wt. % of monomers (a), (b), and (c) are based on the total weight of monomers (a), (b), and (c).

The invention discloses pinewood water-based oil-proof transparent primer as well as a preparation method and an application thereof. The pinewood water-based oil-proof transparent primer is formed by mixing components A with components B according to the mass ratio of 100:(5-15), wherein the components A consist of 60 to 70 percent of waterborne polyurethane-acrylic ester graft oil-proof copolymers, 15.6 to 24.6 percent of acrylic resin, 14 to 19 percent of water and 0.4 percent of additives, and the components B are polyfunctional aziridine solution. Paint films formed by the pinewood water-based oil-proof transparent primer have the characteristics of high compactness, resistance to corrosion of various kinds of organic solutions and chemical corrosion, water resistance, no toxicity and no odor, and in addition, grease can be efficiently sealed. The oil bleeding problem of pinewood products existing for a long time is thoroughly solved. In addition, the pinewood water-based oil-proof transparent primer adopts the water as diluting agent, so no volatile organic compounds (VOC) are released in the production and use processes, and the environment-friendly coating is really realized.

A process for making a stiffened and rigid paper includes preparing a pulp slurry consisting essentially of water, a cellulosic pulp, a crosslinker, and a starch, and optionally a binder; draining the liquid from the pulp slurry to form a web; and drying the web. Alternatively, a process for making a stiffened and rigid paper includes the step of adding at least one crosslinker at one or more locations, such as at the wet-end, dry-end, or at both ends of the papermaking process. Suitable crosslinkers include a glyoxal-containing crosslinker, a gluteraldehyde, a polyfunctional aziridine, a zirconium-containing crosslinker, a titanium-containing crosslinker, and an epichlorohydrin, and mixtures thereof. When a binder is employed, it can be added either in the dry or wet form. Provided is a neutral or alkaline process to produce a paper product having the improved mechanical properties of a laminated product in the Z-direction, without a lamination step.

The invention relates to an ultraviolet-light cured high-temperature resistant pressure-sensitive adhesive. The pressure-sensitive adhesive comprises 5-20% of a solvent-free ultraviolet-light cured prepolymer, 0.1-2% of a functional crosslinking monomer, one or more functional monomers, an ultraviolet-light initiator, a pigment, a filler and a tackifying resin, wherein the solvent-free ultraviolet-light cured prepolymer comprises 80-90wt% of alkyl acrylate monomer and 10-20wt% of a polymerizable unsaturated monomer with a polar group, the functional crosslinking monomer is prepared from bifunctional or polyfunctional aziridines, and the one or more functional monomers are used for improving the adhering properties. No volatile organic solvent is added in the whole process of preparing the pressure-sensitive adhesive, and the pressure-sensitive adhesive complies with the requirements of laws and regulations on environmental protection. Compared with the pressure-sensitive adhesive prepared by adopting the conventional crosslinking method, the pressure-sensitive adhesive has good high-temperature shearing resistance and adhering properties, can be regulated in properties by regulating the use amount and overcomes the defects that the existing pressure-sensitive adhesive hardens quickly due to the large use amount of the crosslinking agent. The pressure-sensitive adhesive can be prepared into a lining-substrate free integral pressure-sensitive adhesive tape with a thickness of 3mm.

One- and two-part spray non-isocyanate foams that include an amide-based oligomer containing pendant carboxylic acid and a polyfunctional aziridine crosslinking agent is provided. The amide oligomer typically contains urea links, urethane links or both groups. Additionally, the foams may include one or more plasticizer, a non-functionalized resin, a surfactant, and/or a thickening agent or rheology modifier. The amide oligomer does not contain any isocyanate groups, and, as a result, there are no free isocyanate moieties generated during formation of the foam that may be potentially hazardous to workers installing the foam. The presence of the urethane segments on the oligomer permits for the generation of a polyurethane foam without the drawbacks of conventional polyurethane foams. The foams may be used to fill cavities, cracks, gaps and crevices, such as around windows and doors, and may also be used in flash and batt systems.

There is disclosed a cross-linked hyaluronate compound obtained by reacting a sodium hyaluronate compound with a polfunctional aziridine compound as a cross-linking agent. The polyfunctional aziridine compound was added to hyaluronan of various molecular weights in an equivalent ratio of HA/AZ of 1:1 to 1:10, preferably, 1:3 to 1:10, more preferably, 1:3 to 1:5; most preferably 1:4 to 1:5. The polymeric hydrogel compounds obtained are useful to prevent the formation of post-operative adhesions, designing tissue engineering applications, and the like.

Latex spray foams formed from a non-aqueous two-part foamable composition are provided. The A-side contains includes a dry latex polymer, a multifunctional acid, and a liquid blowing agent and the B-side contains a polyfunctional aziridine crosslinking agent a plasticizer, and, optionally, a non-functionalized resin. The multifunctional acid may be a secondary emulsion that is added to the composition separately. The polyfunctional aziridine crosslinking agent may be diluted by a plasticizer, which reduces the viscosity of the B-side. The plasticizer should have no acidic protons to react with the crosslinking agent. When no acidic protons are present, the B-side is stable for extended periods of time. Additionally, the inventive foam and composition are desirably free of water. The lack of water or small amount of water in the inventive foam composition permits the foam to be sprayed at temperatures below freezing and to a greater thickness compared to water-containing compositions.

The outer two layers, composed of an undercoat of an ionomer and a topcoat of polyurethane, on a wooden core of a bowling pin are bonded together by use of either of a polyfunctional aziridine or polyfunctional carbodiimide providing superior adhesion under shock plus several shop advantages including lessened air pollution and ease of application.

The invention provides a conductive composition for forming a conductive film with easily-adjusted conductivity-static resistance. The conductive composition comprises a polyfunctional aziridini derivative (A) comprising at least three aziridinyls of special structures, an aziridinyls open-loop catalyst (B), a Pi conjugated system conductive polymer (C) containing heteroatom and a solvent (D).

Coated abrasive articles have a tie layer that is preparable by at least partially polymerizing an isotropic polymerizable composition comprising a polyfunctional aziridine, an acidic free-radically polymerizable monomer, and an oligomer having at least two pendant free-radically polymerizable groups, wherein homopolymerization of the oligomer results in a polymer having a glass transition temperature of less than 50 degrees Celsius.

The invention discloses latex used for the production of tobacco used wood pulp non-woven, which consists of an adhesive, a cross-linking agent, water and a curing agent and a stabilizer; the adhesive is any one of the following substances: vinyl acetate, vinyl acetate copolymer, acrylic ester and acrylic copolymer or the mixture of vinyl acetate and vinyl acetate copolymer or the mixture of acrylic ester and acrylic copolymer; the cross-linking agent is any of the following substances: HMMM, polyfunctional aziridine, bifunctional end aziridine or closed isocyanate; the curing agent is ammonium chloride; and the stabilizer is ammonia water. Compared with the prior art, the tobacco used wood pulp non-woven produced with the latex has the advantages of higher humidity and strength, lower moisture regain, good compression elasticity, as well as good stiffness and filtering performance when being used as cigarette holder so that the cigarette is not apt to occur hot collapse or generate foreign odor when being smoked.

A matte finish composition exhibiting superior qualities of maintaining a matting agent in dispersion without significantly increasing viscosity, which includes a polymer, a water-based solvent, a matting agent and a crosslinking agent. The polymer may include urethane monomers. The matting agent may be silicon dioxide. The matting agent may be a fine dust. The crosslinking agent may include a polyfunctional aziridine such as pentaerythrito-tris-(β-N-aziridinyl propionate).

The invention discloses an aqueous pressure-sensitive adhesive for a heat-insulating broken bridge aluminum profile protection film and a preparation method thereof. The preparation method comprises:preparing a seed emulsion through a seed emulsion polymerization method, adding a pre-emulsion into the seed emulsion drop by drop, then adding an initiator into the emulsion in the later stage so that the reaction is full, cooling the system, adjusting pH, adding a defoaming agent and a wetting agent into the system, filtering the mixture and discharging the product. The invention also provides apreparation method of the heat-insulating broken bridge aluminum profile protection film. The preparation method comprises: adding a polyfunctional aziridine crosslinking agent into the aqueous pressure-sensitive adhesive, carrying out full mixing, uniformly coating a polyethylene film with the glue, carrying out baking through a baking channel and carrying out rolling. The protection film has good adhesion to a heat-insulating broken bridge aluminum profile and good high temperature and high humidity aging resistance. The pressure-sensitive adhesive emulsion utilizes the appropriate defoaming agent and wetting agent and is especially suitable for low-speed coating with a protective film (at 9-15 m/min).

The invention relates to a preparation method of a water-based acrylate pressure-sensitive adhesive, and an application of the adhesive in household appliance protective films. A component A of the pressure-sensitive adhesive is an alkyl (methyl) acrylate polymer, and a component B of the pressure-sensitive adhesive is a polyfunctional aziridine-series crosslinking agent. The component A is obtained through polymerization of butyl acrylate, isooctyl acrylate, methyl methacrylate, butyl methacrylate, 2-hydroxypropyl acrylate, acrylic acid and (methyl) acrylate containing two double bonds, wherein the polymerization is initiated by ammonium sulfate. The pressure-sensitive adhesive provided by the invention has the advantages of good leveling property, less foam, fisheye-free property in coating, and the like. When the adhesive is applied on a needed substrate to prepare a household appliance protective film, the protective film has good high-temperature resistance, good high-humidity resistance and good aging resistance. When the protective film is torn from the surface of a household appliance, no residual adhesive or spot is left.

The present disclosure is directed to a curable precursor of a pressure sensitive adhesive comprising a) a (co)polymeric material comprising a rubber-based elastomeric material; b) a polyfunctional aziridine curing agent; and c) an acid generating agent. The present disclosure is also directed to a method of manufacturing such pressure sensitive adhesives and uses thereof.

To provide both an excellent solvent-resistance and a conduction reliability to an insulation coated conductive particle that is suitable for use as a conductive particle in an anisotropic conductive adhesive, the insulation coated conductive particle is configured such that the surface of a conductive particle is coated with an insulating resin layer formed of an insulating resin having a carboxyl group, and the insulating resin layer is surface-treated with a polyfunctional aziridine compound. Examples of the aziridine compound include trimethylolpropane-tri-β-aziridinylpropionate, tetramethylolmethane-tri-β-aziridinylpropionate, and N,N-hexamethylene-1, 6-bis-1-aziridinecarboxamide. The insulating resin layer is preferably composed of an insulating resin having an acrylic acid monomer unit or a methacrylic acid monomer unit. Specifically, the preferable insulating resin is an acrylic acid-styrene copolymer.