186 results about "Post cure" patented technology

A thermosetting resin composition has particular applications in three dimensional (3-D) printing. The thermosetting resin composition exhibits high performance and is characterized by a high temperature two stage cure resin composition. The thermosetting resin composition comprises cyanate esters and other high temperature resins, photo curable monomers, photo initiator, metal catalyst or ionic liquid catalyst. The thermosetting resin composition cures at room temperature to form 3-D objects and upon further post cure these objects exhibit high temperature properties enabling use at temperatures exceeding 150C.

A curable composition includes an olefinically unsaturated monomer and a poly(arylene ether) having two polymerizable groups and an intrinsic viscosity of about 0.05 to about 0.30 deciliters per gram. The composition exhibits an improved combination of high flow during molding and high post-cure stiffness and impact strength. The composition is particularly useful for fabricating plastic-packaged electronic devices.

Machinable composite molds for use in making a composite structure. The mold includes a mold body having a tool surface that is shaped to provide the molded surface of the composite structure. The mold body is made up of at least one mold layer composed of a quasi-isotropic material composed of a plurality of randomly oriented fiber bundles or chips impregnated with a resin. The use of randomly oriented fiber chips allows post-cure machining of the mold body.

The invention provides a polyurethane rail tie plate which is a microporous polyurethane elastomer made from raw materials of a polyalcohol composition, an NCO-blocking modified isocyanate curing agent and a foaming agent. The invention further provides a preparation method of the polyurethane tie plate, comprising the following steps: adding the foaming agent to the polyalcohol composition; adding the modified isocyanate curing agent to a mixture of the polyalcohol composition and the foaming agent according to a certain proportion at the temperature of 25-60 DEG C; and stirring and evenly mixing the obtained mixture, casting for molding, curing, taking out and then post-curing to obtain the polyurethane tie plate. The dynamic-static stiffness ratio of the tie plate is not more than 1.5; fatigue tests for 3 million times show no damage to appearance of the tie plate and low dimensional change rate of not more than 30%, thus achieving good damping and cushioning effects and enhancing comfortableness when a train runs; and meanwhile the rail tie plate has good durability.

A kit is provided based on two pastes designed to produce bone cement with high initial stability and therefore low post-cure. The kit includes a paste A and a paste B, wherein paste A contains (a1) a polymerizable monomer having a pH in water in the range of 5-9, (a2) a filling agent insoluble in (a1), and (a3) a barbituric acid derivative selected from the group consisting of 1,5-disubstituted barbiturates, 1,3,5-trisubstituted barbiturates, and 1,3,5-tetrasubstituted barbiturates, and paste B contains (b1) a polymerizable monomer having a pH in water in the range of 5-9, (b2) a filling agent insoluble in (b1), (b3) a peroxide soluble in (b1), (b4) a heavy metal compound insoluble in (b1) and selected from the group consisting of heavy metal salts and heavy metal complexes, and wherein at least one of the pastes A and B contains a halide salt.

The invention discloses a preparation method of a 1,5-naphthalene diisocyanate-based polyurethane microcellular elastomer. The preparation method comprises the following steps of: 1, dewatering polymer polyhydric alcohol by stirring under a vacuum condition at 80 to 150 DEG C; 2, under the protection of nitrogen, reacting excessive 1,5-naphthalene diisocyanate-based polyurethane with the polymer polyhydric alcohol at 100 to 150 DEG C so as to generate a prepolymer containing redundant -NCO groups; 3, performing chain extension by adopting a full pre-polymerization method, mixing a prepolymer component with a chain extender component according to a proportion, and stirring at a high speed, injecting the mixture solution into a mould of which the temperature is between 80 and 110 DEG C, and demoulding after precuring for 10 to 60 minutes, wherein the chain extender component does not contain the polymer polyhydric alcohol; and 4, post-curing the product subjected to demoulding, for 13 to 18 hours at 100 to 120 DEG C. The 1,5-naphthalene diisocyanate-based polyurethane microcellular elastomer prepared by using the method disclosed by the invention is used as a high-strength damping material for bearing dynamic fatigue, such as buffering damping components of an elevator motor and other equipment which can easily generate acting force with a certain frequency.

A via-filling material improves a via-filling process in manufacturing multi-layered printed circuit boards. The via-filling material is capable of undergoing UV pre-cure and thermal post-cure step. Exposed to ultraviolet light, the via-filling material filled up the two ends of the via form solid barrier films so that the inside via-filling material will not flow out during a thermal post curing process due to an lower viscosity of said material. The dual-cure treatment resolves the problems of polishing, sagging and bubbling in the via-filling process and ensures the integrity of the filling material. As a result, the via-filling material with smooth surface and a solid inside without void or hole therein formed.

The invention discloses low-fat additive-free yogurt and a preparation method thereof. The low-fat additive-free yogurt includes main ingredients such as raw milk and fermenting agent, and raw milk is degreased, concentrated, fermented with fermenting culture, cooled, counterbalanced, filled and post-cured to be made into the additive-free yogurt with low content of fat. According to the low-fat additive-free yogurt and the preparation method thereof, by increasing the content of proteins inside the raw milk and prolonging the fermentation time, partial proteins are modified, a substance with the structure and taste being similar to that of the fat is generated, and a taste of smoothness and coolness is applied to the low-fat yogurt; and through the counterbalancing processing technique, protein particles in the yogurt can be eliminated, an exquisite taste is applied to the yogurt, and the viscosity of the yogurt is greatly improved by utilizing the yogurt post-curing technique. On the premise that no external fat substitute is used and no additive such as a thickening agent and essence is utilized, the low-fat additive-free yogurt with a taste being similar to that of whole fermented milk is developed only by improving the raw material and yogurt manufacturing technique conditions.

A functionally graded shape memory polymer (SMP) that has a range of transition temperatures that are spatially distributed in a gradient fashion within one single article. The SMP is formed by post-curing a pre-cured glassy SMP in a linear temperature gradient that imposes different vitrification temperature limits at different positions along the gradient. Utilizing indentation-based surface shape memory coupled with optical measurements of photoelastic response, the capability of this material to respond over a wide range of thermal triggers is correlated with the graded glass transition behavior. This new class of SMP offers great potential for such applications as passive temperature sensing and precise control of shape evolution during a thermally triggered shape recovery.

A combination loader and post cure tire inflator for use with a tire press is provided. A post cure inflator for inflating and curing vulcanized tires includes a plurality of inflator stations with each inflator station including a pair of axially aligned, vertically separable tire inflating chuck rings. A loading apparatus includes a loading arm movable along a linear track relative to the plurality of inflator stations to load and unload each vulcanized tire in a selected one of the plurality of inflator stations without rotating the vulcanized tires in a turnover operation.

A system is disclosed for the manufacture and use of a composite reinforced gas transport module ("GTM"). A metal shell of the system is wrapped circumferentially with a composite reinforcement, the composite reinforcement is post cured and the metal shell is then pressurized beyond the yield point of its material to load the composite reinforcement. The system is then brought to ambient temperature. The expansion deformation of the metal shell due to pressurization beyond the yield point results in a loading of the metal shell by the cured composite reinforcement at ambient temperature. Thus, a negative hoop stress condition is created in the metal shell at ambient to reduce the hoop stresses created during subsequent pressured operation.

This invention relates to a pneumatic tire with an improved driveability and a reduced weight as well as a maintained traveling durability, and particularly a pneumatic tire having a high post cure inflation pressure, and being best suited as a pneumatic tire for a light truck with a high air pressure. In the pneumatic tire, twisted cords formed of a polyketone fiber represented by the following formula (a), and having a thermal shrinkage stress value, at a dry heat temperature of 150° C., of not less than 0.19 cN/dtex are used as cords for forming a carcass layer:

—(CH₂—CH₂—CO)n-(R—CO—)m-  formula (a);

• • where the relationship between n and m is represented by the following formula (b), and R represents an alkylene group having 3 or more carbon atoms:

1.05≧(n+m)/n≧1.00  formula (b).

Disclosed herein are self-crosslinking compositions containing a hydrosilation catalyst and the reaction product of a mixture comprising (i) a resinous copolymer having both silicon-bonded hydrogen and silanol groups, and (ii) one or more vinyl-functional polyorganosiloxanes. These compositions have stable post-cure adhesive properties and are suitable for use in electronic applications.

The invention discloses a preparation method of an antibacterial polyurethane automobile shock damping bumper block. The method comprises the following steps: 1) preparing an antibacterial polyalcohol; 2) preparing a prepolymer; 3) molding by casting; 4) precuring and demolding; and 5) post-curing to obtain the antibacterial polyurethane automobile shock damping bumper block. On the premise of maintaining the dynamic fatigue deformation rate and comprehensive mechanical performance of the bumper block, the antibacterial property of the automobile bumping block is improved. According to the preparation method of the environmentally-friendly antibacterial polyurethane automobile shock damping bumper block, a natural biological antibacterial agent is adopted to overcome the defect that other antibacterial agents are not stable and are easily hydrolyzed, and the requirement of medium and high end automobile market for the antibacterial property of the automobile bumper block is fulfilled.

An adjustable shim comprises a stack of plies comprising plastics material reinforced with a three-dimensional fibre layer, the plastics material being flowable under compressive force prior to cure for adjusting the thickness of the shim. The shim may be used to fill a void between two structural components joined together. Also, a method of filling a void between two structural components using the shim. The shim is easy to handle, can easily be laid up to a variety of thicknesses, and is quick to cure (depending on the plastics material used). The three-dimensional fibre layers make the shim highly compressible prior to cure, and provide significant reinforcement to the plastics material of the plies to support compressive stresses in the shim post cure.

The present invention relates to coating compositions suitable for coating flexible substrates, such as the myriad molded elastomeric materials in pre-cured or post-cured condition. The coatings are applied to the entire exterior surface thereof. The coating compositions can be applied to shaped or molded articles such as those made from thermoplastic vulcanizates or thermosettable rubber. The coating compositions of the present invention are particularly suitable for coating cured rubber engine mounting devices which are comprised of vulcanized elastomeric parts that have been bonded to metal parts.

The invention discloses a preparation method of a high hardness polyurethane thermoplastic elastomer. The method comprises the following steps: 1) adding polyester macromolecular dihydric alcohol and a catalyst into a reaction kettle, heating for a vacuum dehydration reaction, then adding 3-3-di methyl-4,4-biphenyl diisocyanate, and conducting heating reaction to obtain a polyurethane prepolymer; and 2) heating and melting the polyester macromolecular dihydric alcohol, catalyst, a chain extender, an antioxidant and a light stabilizer, and fully mixing the mixture with the polyurethane prepolymer obtained in the step 1) to obtain a thermoplastic polyurethane elastomer; and conducting post curing to obtain the high hardness thermoplastic polyurethane elastomer. The high hardness thermoplastic polyurethane elastomer prepared by the method disclosed by the invention can be used in the occasions of guide roller frames, brassie, machinery parts, seals or auto parts, has good comprehensive properties and processing properties, and is an environment-friendly product used as a substitute for general plastics and part of the engineering plastics.