79results about How to "Excellent resistance to dripping" patented technology

The invention discloses a phosphorus-containing flame retardant copolyester ionomer and the preparation method, which is characterized in that: based on a plurality of building units synthesizing polyester represented by I and II, a plurality building units represented by IV or a plurality building units represented by III and IV are introduced and the copolyester ionomer is prepared by random copolymerization; wherein, the number of the building units represented by III is 0 to 20 percent of the number of the building units represented by I, the number of the building units represented by IV is 0.1 to 20 percent of the number of the building units represented by I, the number of the building units represented II: the number of the building units represented by [I+III+IV] equals 1, the intrinsic viscosity of the prepared copolyester ionomer [Eta] is in the rang of 0.25 to 0.95dL/g. The phosphorus-containing flame retardant copolyester ionomer has the advantages that: because the ionic groups are phosphorus-containing groups, the flame-retardance modification and the ionization modification of polyester are realized simultaneously; meanwhile, the melt viscosity of polyester is enhanced by the incarbonization produced by the phosphorus-containing ionic groups and the ''physical crosslinking'' produced by the ''ionic aggregate'', thus, the flame retardant and anti-dripping performance is given to polyester.

The invention discloses branching, cross-linking, expanded, melt-dropping-resistant and flame-retardant copolyester based on a triazine ring structure. The copolyester is prepared by conducting random copolymerization on structure units expressed as formulae I, II and III or structure units expressed as formulae I, II, III and IV according to a conventional method. The intrinsic viscosity [eta] of the prepared branching, cross-linking, expanded, melt-dropping-resistant and flame-retardant copolyester is 0.41-1.10 dL/g; the extreme oxygen index is 24.5-38.0%; the vertical combustion grade is between V-2 and V-0; the peak heat release rate p-HRR in a cone heat test is 247-643 kW/m<2>. According to the copolyester, a modified monomer of the triazine ring structure is introduced, and then copolymerized with polyester to form a unique ternary branched cross-linking network structure; the modified monomer of the triazine ring structure contains the flame-retardant element nitrogen, so that the melt viscosity of the copolyester in combustion can be improved; the copolyester is capable of releasing nitrogen and quickly forming an expanded char layer with excellent heat and oxygen insulation effects; especially, a phosphorus-nitrogen synergism effect can be generated when the copolyester is used together with the conventional phosphorus-containing flame-retardant agent; the flame-retardant performance and the melt-dropping-resistant effects can be more excellent; the selected monomer is low in price; the preparation process is mature; the operation is simple and convenient; the industrialized large-scale production is liable to implement.

The invention relates to a method for preparing an expansive type dripping-resistant flame retardant. The method is characterized by comprising the following steps: mixing phosphorus-containing copolymerization type flame retardant and dihydric alcohol, reacting under the conditions of the temperature of 70-170 DEG C and the pressure of 0.01MPa below zero to 0.096MPa below zero for 4-10 hours, thereby preparing a flame-retardant esterification fluid; and enabling the flame-retardant esterification fluid to react with diamine and ethanol under the conditions of the temperature of 60-140 DEG C and the pressure of 0.01MPa below zero to 0.096MPa below zero for 4-10 hours, adding a dripping-resistant agent and an inorganic flame retardant, thereby preparing the expansive type dripping-resistant flame retardant. The expansive type dripping-resistant flame retardant prepared by the invention has the advantages of high flame retardant efficiency, high temperature resistance, dripping resistance, smoke suppression and small influence on mechanical properties of materials, the flame retardant grade reaches the V-0 level in the UL-94 standard, and the limit oxygen index is over 32 percent. The expansive type dripping-resistant flame retardant can be used for flame-retardant nylon, polyesters and other engineering plastics, also can be applied to the field of fiber textiles and has wide market prospects.

The invention relates to flame-retardant anti-dripping polyester fiber and a preparation method thereof. A phosphorus-based flame retardant and graphene oxide react under a certain condition to prepare a flame-retardant anti-dripping agent, then terephthalic acid and ethylene glycol are utilized as raw materials, the flame-retardant anti-dripping agent is introduced into a polyester matrix by an in-situ polymerization method to prepare flame-retardant anti-dripping polyester, and then the flame-retardant anti-dripping polyester fiber is prepared by a melt spinning assembly. A technology designed by the invention not only reduces an effect of the phosphorus-based flame retardant in a polyester polymerization process, but also utilizes excellent dispersing performance and anti-dripping performance effects of the graphene oxide to make a final product have flame-retardant anti-dripping performance. The flame retardance of the prepared flame-retardant anti-dripping polyester fiber is obviously improved, and the prepared flame-retardant anti-dripping polyester fiber can be widely applied to the fields of home textiles, clothes, sports, leisure and the like.

The invention relates to the field of flame-retardant polymer materials and particularly relates to a novel halogen-free flame-retardant composition, halogen-free flame-retardant PBT engineering plastic composite material and a preparation method thereof. The halogen-free flame retardant FRs is mainly obtained by mixing FR1, FR2, FR3, FR4 and FR5 at a specified ratio and the substances are used in combination so that the halogen-free flame-retardant system has higher heat-resistant stability and good fire-retardant property. The halogen-free flame-retardant PBT engineering plastic composite material is mainly prepared from PBT, alkali-free glass fiber, the halogen-free flame retardant FRs, a CTI synergist, an antioxidant, a lubricant, a coupling agent, a compatibilizer and a toughener; by the cooperation of each component, the prepared halogen-free flame-retardant PBT engineering plastic composite material has excellent comprehensive properties such as flame retardant property, electrical property, heat resistance, mechanical property and coloring property; the preparation method of the composite material is simple and feasible and the prepared composite material has excellent comprehensive properties.

The invention discloses a preparation method of PPS fibers with self-extinguishment and free of molten drops. The preparation method comprises the following steps: soaking a pure polyphenylene sulfide fiber serving as a raw material into an oxidant solution, controlling the soaking temperature and the soaking time by selecting the type of an oxidant, adjusting the oxidization degree of sulfur atoms on the surface of the fiber, performing solvent separation after an reaction, and washing and drying the PPS fibers. The preparation method is simple and feasible, and a complicated fiber modification method is eliminated; the performances, such as oxidization resistance, high-temperature resistance, creep resistance and molten drop resistance, of the prepared PPS fibers are greatly improved.

The invention discloses a flame-retardant nano composite material and a preparation method thereof. The flame-retardant nano composite material comprises the following components in parts by weight: 80-100 parts of polypropylene resin, 1-4 parts of a compounded nano flame retardant, 5-15 parts of nano talcum powder, 0.5-1.5 parts of a flame-retardant synergist, 0.1-0.5 part of anti-dripping agent,1-4 parts of a compatilizer, 0.1-0.5 part of an antioxidant and 0.5-1.5 parts of a reinforcing agent. The composite material prepared by combining specific components has the advantages of good mechanical property, good flame-retardant effect, less smoke generated during combustion, good anti-dripping effect, no harm to human body and no environmental pollution; meanwhile, the preparation processis simple and convenient, the cost is low, and the composite material is suitable for industrial production.

The invention provides applications of fluorine-containing sulfonate as a flame retardant in polyester PET, and a flame-retardant composition containing the fluorine-containing sulfonate. According tothe invention, a compound containing fluorine and sulfur (preferably perfluorosulfonate) and a DOPO flame retardant take a synergistic effect on fire retardation of PET; and the flame-retardant composition comprises a compound containing fluorine and sulfur and a DOPO flame retardant, can be used as a PET flame retardant, and enables flame-retardant PET to have excellent molten drop resistance and excellent flame retardance under the condition of maintaining good spinning capability.

The invention discloses a copolyester crosslinking monomer, a copolyester based on the monomer and a preparation method thereof. The copolyester is prepared by carrying out random copolymerization on structural units disclosed as I, II and III. The intrinsic viscosity number [eta] of the copolyester is 0.20-0.94 dL/g. The invention also discloses a preparation method of the copolyester. The introduced crosslinking group is a cyclic olefin structure which has a unique structure and can be subjected to chemical decomposition rearrangement with double bond at high temperature, causing crosslinking, thereby greatly enhancing the complex viscosity of the copolyester in the combustion process; and thus, the carbonization capacity is enhanced, so the copolyester has excellent flame retardancy and molten drop resistance, and the glass transition temperature of the copolyester can be obviously enhanced. The structure is simple to synthesize and low in cost; and the structure is free of the volatilizable halogen, phosphorus and other toxic substance elements in the traditional flame retardant, and thus, belongs to a green flame-retardant copolyester.

The invention discloses an ionic monomer containing a benzo heterocyclic sulfonate structure, an ionomer using the same for flame resistance and molten resistance, and a preparation method and application thereof. The ionomer for flame resistance and molten resistance is prepared by esterifying a copolyester monomer of dibasic acid or ester thereof and C2-C8 polyol, a catalyst and the ionic monomer containing the benzo heterocyclic sulfonate structure with a structural general formula as shown in the specification by a direct esterification method or an ester exchange method through a polycondensation reaction, wherein the ionic monomer containing the benzo heterocyclic sulfonate structure can form an ionic cluster in a molecular chain of the ionomer to form a stable physical crosslinkingnetwork; In addition, the ionomer has good carbon-forming property, when the ionomer is introduced with a low content, not only can the melt strength of the polymer be increased, but also stable and compact carbon layer can be formed to restrain the molten drop phenomenon, so that the ionomer can be used to prepare textile fibers and cationic dyeable polyester textiles, engineering plastics and packaging materials at room temperature. The preparation method is mature, simple and convenient, and industrial production can be easily achieved.

The invention discloses a synthesis method of a Schiff base phosphazene double-base structure flame retardant. The synthesis method comprises the following steps: S1, reacting phosphonitrilic chloridetrimer with a compound containing hydroxyl and active carbonyl, a strong alkali and weak acid salt and a solvent to prepare a phosphazene-containing intermediate; S2, reacting the phosphazene-containing intermediate prepared in the step S1 with an alcohol amine compound and a solvent to prepare the Schiff base phosphazene double-base structure flame retardant. A synthesis method of a modified polyurethane flame retardant comprises the step of applying the prepared Schiff base phosphazene double-base structure flame retardant to waterborne polyurethane to prepare a waterborne polyurethane flame retardant containing the hydroxyl-terminated Schiff base phosphazene double-base structure. The Schiff base phosphazene double-base structure flame retardant can effectively improve the flame retardancy and molten drop resistance of a base material; a Schiff base structure contained in the structure of the modified polyurethane flame retardant has certain stability, crosslinking of melt and formation of residual carbon can be promoted, the molten drop resistance of a prepared flame-retardant material is improved, two elements including nitrogen and phosphorus in a phosphazene ring can achieve synergistic flame retardance, and a good flame-retardant effect is achieved.

The invention discloses a halogen-free and flame-retardant glass fiber reinforced nylon composite and a preparation method thereof, and belongs to the field of production of halogen-free and flame-retardant reinforced nylon and polyphenylene sulfide composites. The halogen-free and flame-retardant glass fiber reinforced nylon composite is prepared from 25-50 parts of nylon, 5-15 parts of polyphenylene sulfide, 10-30 parts of glass fiber, 15-25 parts of a halogen-free and flame-retardant mixture, 1-5 parts of a compatilizer, 0.1-0.3 parts of an antioxidant and 0.1-0.5 parts of a lubricant by mixing and extruding. The halogen-free and flame-retardant mixture is prepared from flame-retardant red phosphorus masterbatch, melamine cyanurate and organic nano-montmorillonite in a mass ratio being5:1:1-5:3:3 by compounding. By compounding polyphenylene sulfide and nylon, hardness, wear resistance and creep resistance of the material are improved; meanwhile, flame retardance of the composite isimproved by the halogen-free and flame-retardant mixture, oxygen index reaches 28 or higher, and finally, the halogen-free and flame-retardant glass fiber reinforced nylon composite product with excellent combination property is obtained.

The invention discloses a high temperature crosslinked anti-dripping flame retardant with Schiff base and phosphoryl (phosphonyl) structure. The flame retardant has the following repeating structure unit shown as the specification. The flame retardant is obtained by subjecting a monomer I with a Schiff base structure and a monomer II with a phosphoryl (phosphonyl) structure to melting reaction or solution reaction under nitrogen protection. The flame retardant disclosed by the invention simultaneously introduces the Schiff base high temperature chemical crosslinking structure and the phosphoryl (phosphonyl) high efficiency flame retardant group, not only can produce a synergistic flame retardant effect of phosphorus and nitrogen, endows the polymer with excellent flame retardant and anti-dripping effects, but also can significantly reduce the heat release rate and total heat release of the material, and can be used for flame retardation of unsaturated polyester resin, epoxy resin, polyester, polyolefin and other materials. The preparation method provided by the invention is simple and easy for control, and is suitable for industrial production.

The invention relates to an application of a polymer as an anti-dripping flame retardant. The polymer comprises esterification products of polyvinyl alcohol and a phosphorus-based flame retardant containing a phosphate group. The preparation method of the polymer comprises the following steps: carrying out esterification reaction on polyvinyl alcohol and a phosphorus-based flame retardant containing a phosphate group in water at 55-65 DEG C under the action of a catalyst, thereby preparingthe polymer after the reaction is completed. According to the molten-drop-resistant flame retardant disclosed by the invention, the polymer of the polyvinyl alcohol and the phosphorus-based flame retardant containing the phosphate group is utilized, the polymer has the characteristics of flame retardanceand molten drop resistance, and the surface of a fabric can be more stably coated with the polymer through a cross-linking structure between the polymer and the fabric, so that the internal fabric iseffectively protected while combustion is carried out, and the safety is improved.

Relating to a block copolymer dye, the invention provides a silicon nitrogen containing flame retardant type polymer dye and a preparation method thereof. Polymethacryloxypropyl polyhedron oligomeric silsesquioxane is adopted as a first block, and polymethacrylate azobenzene is taken as a second blocker to prepare a halogen-free flame retardant block copolymer dye by means of reversible addition-fragmentation chain transfer. The self-assembly effect of a POSS group in the dye molecule can significantly improve the dye molecule fastness and reduce dye molecule migration, and through introduction of an azo group (-N=N-) and the POSS group, the material can be endowed with good flame-retardant and anti-dripping performance. By adjusting the feeding proportion of the two monomers, the content of silicon and nitrogen flame retardant elements in the polymer dye molecules can be controlled, and the method has the advantages of simple synthesis process, mild reaction conditions, easy control of reaction, and is suitable for mass production.

The invention relates to a production method of a blended yarn containing flame-retardant polyester fibers and polyarylate fibers, which comprises the following steps of: respectively carrying out siro spinning on the flame-retardant polyester fiber roving and polyarylate fiber roving to obtain the blended yarn; wherein the flame-retardant polyester fiber roving is prepared from flame-retardant polyester fibers through a pretreatment process, an opening and picking process, a cotton carding process, a second drawing process and a roving process; the polyarylate fiber roving is prepared from polyarylate fibers through a pretreatment process, an opening and picking process, a cotton carding process, a combing process, a drawing process and a roving process. According to the production methodof the blended yarn containing the flame-retardant polyester fibers and the polyarylate fibers, the combing process parameters are adjusted, the cylinder needle number is reduced, the cylinder toothdensity is reduced, the cylinder carding dead zone length is increased, the combing effect of the flame-retardant polyester fibers is ensured, meanwhile, the condition that the hook part of the flame-retardant polyester fiber is combed by the combing needle is reduced, the fiber damage is avoided, the combing cotton drop is reduced, and the prepared blended yarn has excellent mechanical property and flame retardant property.

A polycarbonate resin wherein a relation between the melt tension [MT (g)] at 280°C and melt volume rate [MVR (cm3/10 min)] at 280°C satisfies the requirements represented by formulae (1) to (3), and a polycarbonate resin composition and a molded article containing the same. Formula (1): MT≥(15.4/MVR)-1.3 Formula (2): MT≤(57.4/MVR)-1.3 Formula (3): MT≥1