226 results about "Cure time" patented technology

A process for curing a natural or synthetic rubber compound under a plurality of curing conditions by: (1) obtaining time dependent data streams of dielectric or impedance values from a non-bridged impedance sensing circuit and a capacitor having the rubber compound being cured as a dialectric; (2) determining impedance related measurements from the obtained data streams; (3) determining a predictive curing equation by performing a multiple regression between: (a) reheometric data obtained from a plurality of different rubber compound samples cured in a rheometer at various environmental curing conditions, and (b) corresponding samples cured in a production mold at the same environmental conditions; (4) adjusting the curing equation to obtain cured parts having one or more desired properties; and (5) controlling the mass producing cured parts with a controller that uses the curing equation for predicting a cure time for each part, wherein the predictions are effective over variations in the rubber compound, and in the mold temperature.

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 provides adhesives comprising at least one polymer component which contains at least 65 weight percent propylene, at least one nucleator and at least one functionalized wax. The inventive adhesives have increased heat resistance and decreased set-time, making them particularly well suited for assembly and packaging applications.

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.

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 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 utilizes temperature sensing to measure the internal temperature of an underground structure, such as a pipe, for the purpose of determining a proper cure interval and / or mix ratio of a resin system during a lining operation. A temperature sensor is placed within a pipe or other underground structure to be rehabilitated and at least one temperature measurement is taken within the structure prior to or simultaneously with the installation of a liner. Once the temperature of an internal aspect of the structure is taken, a cure schedule is utilized to determine the appropriate curing time based on test data obtained from baseline tests performed under simulated conditions in a soil cell apparatus. A computer program may be utilized such that upon entering the type of resin, the lowest recorded temperature of the structure, and the initial resin temperature, a cure schedule is supplied.