220 results about "Cure time" patented technology

A combination of chemicals suitable for extending pot life and shortening cure time of a pot mix of a thermosetting composition is disclosed. The combination of chemicals includes a catalyst, such as, dibutyl tin dilaurate; carboxylic or sulfonic acid; and an extender compound, such as 2,4 pentanedione. The combination is generally included in a polymeric component of the urethane composition. The extended pot life provides the user with longer open time during which to efficiently apply a coating of the pot mix over a wide variety of substrate surfaces while still producing coatings that cure quickly upon application.

Bi-component epoxy resin pouring sealant and the preparation and the potting technology are disclosed, which comprises an epoxy resin A component and a cursing agent B component, wherein the curing agent B component at least comprises the mixing curing agent of cashew shell oil modified amine curing agent and fatty amine curing agent. The potting technology comprises mixing and stirring evenly the epoxy resin A component and the curing agent B agent to conduct the potting, and spraying a layer of absolute alcohol on the surface of the pouring sealant after 10-15 minutes. The advantages are that gel time is prolonged through adopting the mixing curing agent of cashew shell oil modified amine curing agent and fatty amine curing agent, the requirement of operation time is fulfilled, and the operation time can reach 20-30 minutes, thereby being beneficial for the encapsulation of housing with large capacity, and the pouring sealant of the invention has the effect of fast curing, wherein the curing time is 1-3 hours, and defoaming is accelerated through spraying a layer of absolute alcohol on the surface of colloid after pouring, thereby making the solid gel surface bright and flat after curing.

The invention relates to a method for modifying cyanate ester resin by hydroxyl-terminated polybutadiene, which comprises the following steps: adding hydroxyl-terminated polybutadiene rubber into the cyanate ester resin with the addition quantity of 5 to 30 weight percent; heating and melting the mixture to be uniformly mixed; heating the mixture to 120+/-15DEG C for pre-polymerization for 10 to 60 min; carrying out casting and curing; uniformly heating at 130 to 200 DEG C for 7 to 10h for curing; and obtaining the modified cyanate ester resin with good performance. The modified system improves the curing process of the resin system, reduces the curing temperature of the resin system, shortens of the curing time, reduces the manufacture cost of the materials, the impact toughness of the cured modified cyanate ester resin is obviously improved, and the thermal stability is maintained. Because the modification system has good compatibility, the modification system does not need solvents, and the invention belongs to a direct method with the advantages of no pollution and simple operation.

The invention relates to a primer composition, comprising at least one polyurethane prepolymer (A) with isocyanate terminal groups, at least one aliphatic polyisocyanate (B), at least one aromatic polyisocyanate (C) and at least one reaction product (D), which may be obtained from at least one epoxysilane and at least one aminosilane or from at least one epoxysilane and at least one mercaptosilane. The invention relates to the use of the primer composition as primer for adhesives, sealants and floor coatings.

An epoxy or hardener mixture comprising (a) optionally water, (b) at least one hardener or epoxy resin, and (c) from 0.1 to 20 weight percent, based on epoxy resin of at least one distyryl phenol, tristyryl phenol or cumylphenol based additive surfactant with phosphate or sulfonate end groups having the structure R—OXn-W wherein R designates a polystyrylphenol or cumylphenol, preferentially chosen from among distyrylphenol, tristyrylphenol or cumylphenol, and mixtures thereof, and wherein OX designates ethylene oxide and/or propylene oxide. The number of groups “n” varies from 0 to 200, and W designates H, sulfate (—SO₃⁻) or phosphate (—PO₃H or —PO₂—OXnR). Freeze thaw resistance and improved stability is obtained in epoxy mixtures used in dispersion form. Improved pot life and cure time is obtained using either the epoxy mixture, the hardener mixture or a combination of the two in epoxy hardener formulations.

The invention relates to a solvent-free single-component polyurethane adhesive and a preparation method thereof. The adhesive comprises the following raw materials in percent by weight: 70-85% of isocyanate, 15-30% of polyhydric alcohols, and a catalyst of which the weight is 0.02%-0.06% of the total weight of the isocyanate and the polyhydric alcohols. The adhesive provided by the invention belongs to a wet-cured type polyurethane adhesive, the storage life is longer than 6 months, the opening time is longer than 24 hours, the curing time is short as the adhesive can be quickly cured within 30 seconds when encountering water at the temperature of 120-130 DEG C, and the bonding strength is high. The adhesive is used for hot-pressing adhesion among polyurethane foam, glass fiber cloth and non-woven fabric during the manufacture of automobile mould pressing roof, the hot-pressing temperature is 120-130 DEG C, the curing time is 20-30s and the bonding strength is 15-20N.

A photopolymerizable coating composition and method for polyamide substrates, wherein the photopolymerizable coating composition consists of at least one acid-functional monomer with a molecular weight less than 240 g/m, at least one reactive crosslinking monomer and at least one photoinitiator. The coating compositions of the invention have improved adhesion to polyamide substrates, and also provide faster cure times and more effective protection from environmental insults as compared to prior art compositions.

Provided are a rubber composition that makes it possible to improve heat resistance and particularly suppress changes in the properties (e.g. hardness) of the vulcanized rubber composition with long-term use (rubber hardening degradation) to suppress a reduction in performance on snow and ice to extend the life-span, without increase in the antioxidant amount, achieve good performance on snow and ice, wet-grip performance, and abrasion resistance, and reduce curing time and enhance cross-linking efficiency; and a winter tire including a cap tread produced from the composition. The rubber composition for a cap tread comprises a rubber component containing an isoprene-based rubber and butadiene rubber; silica; aromatic oil; a compound represented by formula (I) and/or formula (II); and a thiuram vulcanization accelerator, wherein the amount of silica is 15-80 parts by mass, and the amount of aromatic oil is 15-80 parts by mass, per 100 parts by mass of the rubber component.

The invention relates to an adhesive for artificial boards and a preparation method thereof, and a plywood prepared from the adhesive. The adhesive for artificial boards is prepared from a dispersion medium, a protein substance, an alkaline compound and a crosslinking reinforcer, wherein the crosslinking reinforcer is a furfuryl alcohol-furfural furan resin. The adhesive for artificial boards is free of formaldehyde, is mainly prepared from renewable substances, and thus, is an environment-friendly adhesive for artificial boards; the adhesive provided by the invention thoroughly solves the problem of formaldehyde pollution when in use, and ensures water resistance, adhesion strength and other practical properties of the adhesive; compared with the prior art, the components have favorable synergetic effects, so that the effect is enhanced; the preparation method is simple, does not need very long curing time, is convenient to operate and has high production efficiency; and generally, the method comprehensively utilizes the resources, saves the production cost, conforms to the principles of environmental protection and sustainable development, and has favorable application prospects.

The invention discloses a fast-drying, low-temperature type environmental-protection epoxy resin bicomponent dry coating, which consists of two components, namely A and B, and is characterized by: 1. 10 to 15 minutes of initial curing time at the temperature of 25 DEG C and 1 hour of fully curing time; 2. good anti-seismic property, anti-shock property, anti-aging property, anti-compression property, and waterproof property, moisture-proof property, anti-acid property, and the like; 3. high bonding strength, less influence of seasonal climate on construction thereof, being capable of being prepared on the condition of low temperature of minus 20 to minus 80 DEG C, non-hardening property in winter and thus overcoming the difficulty of construction in winter; 4. 30 to 45 minutes of surface drying time, thereby providing a reasonable construction period for construction; and 5. good toughness, non-brittleness, and being capable of preventing deformation, distortion, and falling-off caused by various external factors. The invention can be widely applicable to industries such as construction and decoration, machinery, metal and ceramics, leather and wood, furniture and footwear, and the like.

The invention relates to a spraying rapid-condensed rubber asphalt waterproof coating material which comprises the following formula by weight percent: 50% to 60% of asphalt, 2% to 3% of special emulsifiers, 10% to 20% of rubber emulsions, 0% to 2% of dispersing agents and 0% to 2% of stabilizers. Compared with the prior art, the coating material provided by the invention has the advantages that (1) the operation is simple, rapid and convenient, and the construction period is short; the efficiency is high, i.e., the spraying area of the coating material sprayed continuously for 8 hours by adopting one machine with two spraying guns (three-person group) is more than 1500 m<2>; and the coating material is free of being influenced by the complexity of a base surface structure; and (2) the coating material is formed by compounding a plurality of compound rubbers through a mutual network penetrating technology and a nanotechnology, wherein the coating material is rapidly condensed at the initial phase by utilizing the condensation-prompting catalysis principle, i.e., the film forming speed is rapid, and the initial condensation curing time is only from 3 to 5 seconds. In addition, the surface of a product on the construction site is prevented from being bonded with foreign matters or being damaged, and the defect such that the common paint flows easily is overcome.

The invention discloses a quick-curing adhesive and a preparation method thereof. The quick-curing adhesive is prepared from phenol, 37% formaldehyde, 86% polyformaldehyde, NaOH, H2O, silane coupling agent and phenolic resin curing agent. When the quick-curing adhesive disclosed by the invention is used for preparing an emery cloth grinding tool, the curing drying technique can be implemented after directly drying for 2 hours. Compared with the traditional technique, the invention greatly shortens the curing time, saves the investment into the curing oven, cancels the aging treatment, enhances the work efficiency in production and saves the manpower, thereby greatly shortening the production cycle of the product, achieving the goal of greatly lowering the product cost, enhancing the market competitiveness of the product and improving the economic benefit; and meanwhile, the invention can save electricity, steam, water, coal and the like, and make contributions in the aspects of energy conservation and emission reduction.

The invention provides vamp spray glue and a preparation method thereof. The vamp spray glue is characterized in that each 100 parts of vamp spray glue comprises the following components in parts by weight: 8-15 parts of an ethylene-segmented copolymer elastic body, 5-18 parts of water-white hydrogenated rosin, 5-12 parts of full-hydrogenated petroleum resin, 5-10 parts of 3# glycerinum resin, 2-8 parts of E-12 epoxy resin, 20-30 parts of aromatic environment-friendly solvent oil, 5-15 parts of cyclohexane, 5-15 parts of butanone, 10-20 parts of methyl acetate and 1-2 parts of xanthochromia-resisting auxiliary agent. The vamp spray glue prepared by utilizing the preparation method is non-toxic, environmentally friendly, is short in curing time, good in xanthochromia resistance and low in temperature and cost and is curable and novel.

The invention discloses an earthen site grouting material of a fiber bakelite rod grouted rock bolt based on water-based fluorine. The earthen site grouting material is prepared from the following raw materials at the ratio of (8-10) to (8-10) to (0.5-1.5) to (0.7-1) to (8-10) to (1.5-2.5) to (4-5), wherein the ratio is mass ratio. The earthen site grouting material has consistency with a surrounding soil material in ingredient, physical and chemical property and mechanical property, can be fused into a whole under the action of a curing agent water-based fluorine and inserted bar glue, and has compatibility with a surrounding rammed earth layer; meanwhile, the material contains the water-based fluorine, the inserted bar glue and the like, is close to cotton and bast fiber and phenolic resin in the bakelite rock bolt in property, and has relatively good compatibility; the curing time can be shortened; and filling and anchoring are facilitated.

An epoxy polyamide adhesive and its preparation method belong to the field of adhesives. The epoxy polyamide adhesive is an adhesive prepared by using epoxy resin and polyamide as main materials, has good caking property with materials such as a steel plate, a rubber plate and the like, and can be applied in bonding between a steel plate and a steel plate as well as between a steel plate and a rubber plate. By interaction between an inorganic filling material and organic main materials, adhesive force, strength and toughness of the adhesive are enhanced. The epoxy adhesive prepared by using polyamide as a curing agent has advantages of high peel strength and high strength. By using melamine and polyamide as a composite curing agent, the defect that curing time is long when polyamide is separately used as a curing agent is solved. The epoxy polyamide adhesive has low curing temperature, can be cured at room temperature, and has advantages of simple technology and convenient operation.

The invention relates to the technical field of adhesive materials, and discloses an epoxy resin structural adhesive with high binding force and a preparation method thereof, the epoxy resin structural adhesive is formed by curing a component A and a component B according to a weight ratio of 100/50; the component A comprises the following components: 95-100 parts by mass of special epoxy resin; 0.2 to 0.5 part by mass of a defoaming agent; 0.3 to 0.8 part by mass of a coupling agent and 0.5 to 2.0 parts by mass of a rheological assistant; the component B comprises the following components inparts by mass: 95-100 parts of polyamide; 0.2 to 5.0 parts of an accelerant and 0.2 to 0.5 part of a defoaming agent, and the epoxy resin structural adhesive solves the problems of long curing time and high curing temperature requirement of epoxy resin structural adhesives, has high bonding performance and flexibility, high and low temperature resistance, high elongation at break and excellent electrical insulation performance of cured products, and can better protect battery packs and reduce economic losses when accidents occur.

The invention discloses a method for manufacturing a modified rubber filler comprising maleic anhydride. The method includes weighing, by weight, 100 parts of rubber fillers, 0.5-4.0 parts of the maleic anhydride and 0.5-4.0 parts of modifiers; stirring and uniformly mixing weighed materials at the temperature ranging from 75 DEG C to 85 DEG C when the modifiers are saline coupling agents or are made from oleic acid; drying the materials in a drying oven at the temperature ranging from 100 DEG C to 120 DEG C for 0.5-3 hours to obtain the modified rubber filler comprising the maleic anhydride; or stirring and uniformly mixing the weighed materials at the temperature ranging from 75 DEG C to 85 DEG C when the modifiers are made from epoxy resin; and solidifying the uniformly mixed materials at the solidifying temperature ranging from 100 DEG C to 150 DEG C for 0.5-1.5 hours to obtain the modified rubber filler comprising the maleic anhydride. The method has the advantages that the maleic anhydride and the polyfunctional modifiers (which can be made from the epoxy resin or the oleic acid or can be the saline coupling agents) are used together by the aid of a mechano-chemistry modification technology, surfaces of the rubber fillers are treated, the maleic anhydride is grafted on the surfaces of the rubber fillers, carboxyl, double-bond and lipophilic groups are led into the surfaces of the rubber fillers, and accordingly the interfacial compatibility of the modified rubber filler and rubber is improved.