45results about How to "Improve toughening efficiency" patented technology

The invention provides low-internal-stress heat-resistant ABS resin and a preparation method and application thereof and belongs to the technical field of modified resin. The low-internal-stress heat-resistant ABS resin is prepared from, by weight, 20-40 parts of ABS rubber powder, 2-10 parts of low-molecular-weight SAN resin, 42-77 parts of high-acrylonitrile-content SAN resin, 1-8 parts of a heat resistant agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant and 0.1-1 part of a weather resistance agent according to a formula. Compared with the prior art, the prepared low-internal-stress heat-resistant ABS resin greatly improves the liquidity of a material on the basis that heat resistance and impact are guaranteed, can obviously reduces the internal gravity in the injection molding process and can be applied to interior decorative parts and exterior decorative painted parts of automobiles.

This invention relates to a PVC impact modifier with new-type nucleocapsid structure and its preparing method and application.It comprises: using acrylic monomer as main material, making cross-linked polymer latex with pure nucleus or nucleocapsid structure by semi-continuously charging mode of seed emulsion polymerization, then in the presence of said latex, adding chloroethene monomer to autoclave to emulsion polymerization, so as to obtain polyacrylate / PVC composite particle modifier with nucleocapsid structure.Because said modifier uses directly PVC as shell, it improves greatly compatibility between modifier and PVC resin matrix at crossblending, increasing two-phase bonding force, effectively giving play to characteristics of polyacrylate elastomer kernel so as to increase PVC material notch impact property, weathering-heating resistance and thermal stability, making general resin have high performance and functionization. It has low production cost, high added value of PVC resin, and widens PVC resin application.

The invention relates to a preparation method of a polyvinyl chloride impact modifier with a core-shell structure. The method adopts acrylate monomer as the main raw material, and prepares a cross-linked polymer latex with an elastomer core-transition layer structure through seed emulsion polymerization in a semi-continuous feeding mode, and then, in the presence of the above-mentioned latex, adds Vinyl chloride monomer and its blend with other monomers are emulsion polymerized to prepare a core-shell structure polyvinyl chloride impact modifier with a transition layer structure. The modifier prepared by this method uses polyvinyl chloride as a thin shell, which greatly improves the compatibility between the modifier and the PVC resin matrix during blending, and effectively utilizes the polyacrylate elastomer core and functional functional groups. The characteristics of polyvinyl chloride can improve the notched impact resistance, weather resistance, and heat resistance stability of polyvinyl chloride materials, and the production cost of this method is lower than that of pure polyacrylate modifiers, which improves the added value of PVC resin and broadens the scope of polyvinyl chloride. Application field and application area of ​​vinyl chloride resin.

The invention discloses a PEB-g-MAN toughening agent, a preparation method thereof and an engineering plastic ABMS. The invention discloses a method for preparing a PEB-g-MAN toughening agent by usinga suspension grafting copolymerization method. The method comprises that: an ethylene-1-butylene copolymer is used as a grafting matrix, methyl methacrylate and vinyl cyanide are used as grafting monomers, and a PEB-g-MAN grafting copolymer of which PEB content is between 52.8 and 71.8 percent by weight is prepared by using suspension grafting copolymerization technology in the presence of an organic solvent. The monomer transformation rate of a grafting copolymer system reaches 80 to 95 percent. The synthesized PEB-g-MAN and SAN resin are mixed together to prepare the engineering plastic ABMS with excellent weather resistance, ageing resistance and yellowing resistance and high impact resistance, wherein the gap impact strength of the ABMS is between 10.5 and 63.1 kJ / m<2>.

The invention is a preparation method of PVC nano-alloy resin with high fluidity and low-temperature toughness. The method includes (1) preparation of nano-seed latex and (2) preparation of PVC nano-alloy resin; by grafting and copolymerizing (BD-ACR) nano-alloy latex through high-temperature suspension to prepare a low-temperature, high-toughness, Nano-alloy PVC resin with good fluidity. The invention not only improves the dispersion degree of the inner core of the elastomer, but also improves the toughening efficiency of the rubber phase. The copolymerized resin can be applied to injection-molded PVC products with high fluidity requirements, and overcomes that the current high-impact PVC alloy resin is not suitable for PVC Insufficient injection molding raw materials.

The invention discloses a PEB-g-SAN toughener and a preparation method thereof as well as engineering plastics AEBS. In the invention, ethylene-butylene copolymer (PEB) serves as grafting substrate and styrene (St) and acrylonitrile (AN) serve as grafting monomers; under the condition of the existence of organic solvent, a suspension graft copolymerization technology can be used for preparing graft copolymer PEB-g-SAN with the PEB content of 40-60wt%. The monomer conversion rate of a graft copolymerization system is 85-95%. The synthesized PEB-g-SAN can be mixed with SAN resin to prepare the high-impact engineering plastics AEBS with excellent weather aging yellowing resistant property, and the notch impact strength of the AEBS is 2-52.5kJ / m<2>.

The invention relates to a coating method of a composite toughened slender rod, and belongs to the technical field of composite surface modification. The coating method comprises the following steps that firstly, fiber bundles soaked in resin penetrate through a small hole primary forming mold, and the circular section shape is formed; secondly, the fiber bundles penetrate through a coating chamber with carbon fiber powder coating stored inside; thirdly, the slender rod passes through a dust collection device which does not make direct contact with the slender rod, and carbon fiber powder which bonded to the surface infirmly are removed; fourthly, the slender rod passes through a preheating device and a heating device for preheating and gelling; fifthly, the slender rod passes through a shaping mold for shaping; sixthly, the slender rod is solidified through the heating device; and finally, the slender rod passes through a dust collector with fine bristle brushes, and fiber powder bonded to the surface of the slender rod infirmly is removed. The coating method can be achieved in the production process of the slender rod, the fiber powder is used as the coating, the bonding performance of coated composites is used, chemical residues are avoided, a separated coating procedure is omitted, the method is simple, and the efficiency is high.

The invention discloses a preparation method for a high-performance steric composite type polylactic acid / elastomer alloy material or product. The preparation method comprises the following steps: completely dissolving a catalyst into absolute ethyl alcohol to obtain a mixture; uniformly mixing the mixture with elasatomer, L-polylactide and R-polylactide; and adding a material mixture into a melting mixer to co-mix and pelletize or re-melt and process, thereby obtaining the high-performance steric composite type polylactic acid / elastomer alloy material or product with excellent melting and stabilizing characteristics and heat resistance as well as high toughness. Though an efficient catalyst, part of a PLA molecular chain is grafted onto an elastomer molecular chain through coupling grafting reaction, so that compatibility with PLA is effectively improved, toughening efficiency is improved, and the obtained alloy material or product has excellent melting stabilizing characteristics, and therefore, multi-time melting processing can be performed. The preparation method is simple and efficient, and easily realizes large-scale industrial production.