4 results about "Laurolactam" patented technology

This invention provides a method for producing aminododecanoic acid from laurolactam. The method includes reacting ammonia and a laurolactam solution under a composite catalyst to obtain a product containing aminododecanoic acid. This method uses laurolactam as a raw material and directly produces aminododecanoic acid through high-temperature alkaline ring-opening under the action of a composite catalyst, while simultaneously yielding high-value-added aminododecanoic acid. Furthermore, the product can be promptly removed, avoiding system blockage caused by overheating and coking, thus improving economic efficiency and making it suitable for industrial production.

The application discloses a method for preparing dodecanolactam from cyclododecanone oxime, wherein the cyclododecanone oxime raw material is diluted, mixed with fluorocarbon auxiliary agent, preheated, and then reacted in a microchannel after passing through a dynamic mixer and entering the microchannel, and the reaction liquid is separated into dodecanolactam product after neutralization and water washing; the method can effectively enhance reaction conversion rate and selectivity, improve stability and safety of device operation, and improve product quality.

The application belongs to the technical field of resin gears, and specifically provides a low-friction composite gear, a preparation method and application thereof, which is prepared by mixing raw materials including the following components by mass: poly(lauryl lactam) 50-60 parts, polyformaldehyde 15-20 parts, a compatilizer 2-3 parts, a heat-conducting fiber 2-3 parts, a coupling agent 0.3-0.4 parts, a crystallization agent 0.1-0.2 parts, and an antioxidant 0.01-0.02 parts; the heat-conducting fiber is obtained by etching and glue-curing poly(ether ether ketone) fiber; and the crystallization agent is obtained by polycondensation reaction of p-dichlorobenzene, sodium sulfide and a biphenyl derivative. The composite gear prepared by using the crystallization agent and the heat-conducting fiber has a gear product crystallinity of 67.9%, a thermal conductivity of 3.34 W·(m·K) ‑1 , and excellent mechanical properties.

The invention discloses a nylon 12 resin and a preparation method thereof, and a nylon 12 fiber and a preparation method thereof. Preparation raw materials of the laurolactam resin comprise the following components in parts by weight: 100 parts of laurolactam, 0.2-1 part of an end-capping reagent, 4-8 parts of metal salt, 0.1-0.5 part of a catalyst, 0.01-0.05 part of a main antioxidant, 0.01-0.05 part of an auxiliary antioxidant and 5-20 parts of water. The molecular weight distribution (PDI) of the nylon 12 resin is 1.6-1.9, and the prepared nylon 12 fiber has the advantages of few broken ends, high monofilament strength (greater than or equal to 5.5 cN / dtex) and good stretchability, is suitable for spinning of superfine denier specification fiber 30D / 24F, has high color fastness, and is helpful for reducing chromatic aberration and dyeing defect phenomena in the dyeing process.