5results about How to "High phosphorus content" patented technology

This invention discloses a polyolefin-containing DCPD epoxy resin and a copper-clad laminate composition thereof, and its preparation method. The method is characterized by: polymerizing polyallyl phenol and catalyst A at high temperature to form polyallyl phenol; then reacting DCPD, polyallyl phenol, and catalyst B at high temperature to form a polyolefin-containing DCPD phenol resin; subsequently, epoxidizing the resin with epichlorohydrin and alkaline catalyst C to synthesize a polyolefin-containing DCPD epoxy resin; finally, mixing the resin with maleimide resin, phosphorus-containing phenolic resin, imidazole accelerator, inorganic filler, and solvent to obtain the polyolefin-containing DCPD epoxy resin composition for copper-clad laminates. The polyolefin-containing DCPD epoxy resin and copper-clad laminate composition prepared by this invention exhibits low dielectric constant, low dielectric loss, and high heat resistance, making it particularly suitable as a raw material for copper-clad laminates and highly practical.

The application discloses a halogen-free flame-retardant long-chain nylon composite material and a preparation method thereof, and belongs to the technical field of nylon flame retardation, and overcomes the defects that high flame-retardant performance and low smoke density of long-chain nylon resin are difficult to be considered in the prior art.The halogen-free flame-retardant long-chain nylon composite material is prepared from the following raw materials in parts by mass: long-chain nylon resin: 65-92 parts, MCA flame retardant: 5-25 parts, the MCA flame retardant being melamine cyanurate, non-benzene ring phosphorus-containing flame retardant: 1-10 parts, and auxiliary agent: 0-5 parts.The halogen-free flame-retardant long-chain nylon composite material maintains a low smoke density by means of the synergistic effect of the non-benzene ring phosphorus-containing flame retardant and the MCA flame retardant to improve the flame-retardant performance.

The invention discloses an epoxy resin composition containing a phosphorus-containing flame-retardant curing agent as well as a preparation method and application of the epoxy resin composition, and belongs to the technical field of preparation of flame-retardant epoxy resin compositions. The epoxy resin composition comprises the following components in parts by weight: 80-100 parts of an epoxy resin matrix, 10-30 parts of a phosphorus-containing flame-retardant curing agent, 6-60 parts of a curing agent, 0.1-0.3 part of an accelerant, 10-30 parts of a synergistic flame retardant, 40-60 parts of filler and the like. The phosphorus-containing flame-retardant curing agent is prepared from phenyl phosphoryl dichloride and a bisphenol compound through a polymerization reaction. The phosphorus-containing flame-retardant curing agent with phenolic hydroxyl reaction active groups is prepared by using low-cost phenylphosphoryl dichloride as a raw material and is matched with an existing flame-retardant system, so that the contradiction between the flame-retardant property and the physical property (mainly Tg) of an epoxy resin material is solved; and the flame retardant grade of V-0 and the higher glass transition temperature can be achieved when the addition amount of the flame retardant is lower.

The invention provides a method for preparing natural-color semi-chemical pulp from bamboo reed, and belongs to the field of papermaking. The method makes full use of the advantages of rich fiber content and high yield of the bamboo reed, and fills the vacancy of domestic plant fiber raw materials. The technological method of the bamboo reed natural-color semi-chemical pulp gives full play to the characteristics of high bamboo reed fiber content, low raw material silicon content, low lignin content, easiness in pulping and good water filtration, develops and optimizes cooking, pulping and screening technologies, and is simple in equipment requirement and easy to popularize. The prepared bamboo reed natural-color semi-chemical pulp is excellent in tightness, ring crush resistance and tear strength, and is suitable for oil-proof paper and packaging paper products.

The invention discloses a phosphorus-solubilizing fungus soil remediation agent as well as a preparation method and application thereof, and belongs to the technical field of soil remediation. The phosphorus-solubilizing fungus soil remediation agent comprises micro-nano bone black and a penicillium deserticola solid fungicide. The preparation method comprises the following steps: pyrolyzing pig bones, and grinding to obtain the micro-nano bone black; the method comprises the following steps: coating a solid culture medium with penicillium deserticola for culturing to obtain a solid plate, washing the solid plate after spores are mature to obtain a spore liquid, mixing a solid carrier with sterile water, then adding a solid fungicide protective agent, and finally adding the spore liquid to obtain the penicillium deserticola solid fungicide. The phosphorus-solubilizing fungus soil remediation agent provided by the invention not only can effectively promote dissolution of insoluble phosphate, but also can fix heavy metal cadmium (Cd) in soil, has a very good application value for farmland Cd pollution remediation and environmental protection, is green and environment-friendly, can comprehensively improve soil fertility, and creates a good nutritional condition for crop growth.