3results about How to "Improve low temperature flexibility" patented technology

The application provides a high and low temperature resistant modified PBS material, a preparation method and an application. The modified PBS comprises the following raw materials in parts by weight: succinic acid: 100 parts; 1,4-butanediol: 110-130 parts; norbornene dimethylol succinic acid prepolymer: 15-30 parts; polyethylene glycol: 5-15 parts; a catalyst: 0.05-0.2 parts; an antioxidant: 0.1-0.5 parts; wherein the number average molecular weight of the norbornene dimethylol succinic acid prepolymer is 1000-2000 g / mol; and the number average molecular weight of the polyethylene glycol is 500-2000 g / mol. By introducing rigid norbornene bicyclic structure and flexible polyethylene glycol segments through chemical bonding, the high and low temperature performance of the PBS is synergistically improved, the modified PBS material can maintain stable mechanical properties in the range of-20 DEG C to 130 DEG C, meanwhile, the modified PBS material has excellent biodegradability, compatibility and processing performance, and the preparation process is simple and controllable, and is suitable for industrial large-scale production.

The invention provides a full-rubber-jacketed alternating current charging pile cable and a preparation method thereof, and belongs to the technical field of cables, and the full-rubber-jacketed alternating current charging pile cable is prepared by the following steps: mixing EPDM particles, modified diatomite, EVA particles, paraffin oil, nano zinc oxide, stearic acid, tetravinyl silane and epoxy isocyanate; adding dicumyl peroxide, uniformly mixing, carrying out extrusion molding, and carrying out heating vulcanization to obtain an insulating layer; chlorinated polyethylene, dioctyl phthalate, calcium stearate, stearic acid, white carbon black, chlorinated paraffin, crude paraffin, MgO, Sb2O3, tetravinyl silane and modified carbon black are mixed and internally mixed, epoxy isocyanate and DCP are added and evenly mixed, and a sheath layer is obtained through extrusion molding; and sequentially coating an insulating layer and a sheath layer on the periphery of the conductor to obtain the full-rubber-jacketed alternating current charging pile cable. The cable prepared by the invention has good wear resistance and flexibility.

This invention belongs to the field of building materials technology, specifically relating to a high-flexibility emulsion, its preparation method, and its application in flexible ceramics. The high-flexibility emulsion uses methyl methacrylate, isooctyl acrylate, hydroxyethyl acrylate, and modifier A as core monomers; and methyl methacrylate, styrene, hydroxyethyl acrylate, and modifier B as shell monomers, prepared using a monomer pre-emulsification semi-continuous seed emulsion polymerization process. Modifier A is obtained by reacting epoxidized cashew nut shell powder with a mercapto compound; modifier B is obtained by reacting carboxybenzotriazole, epoxy silane, and epoxy acrylate. This invention prepares a core-shell structured high-flexibility emulsion using a monomer pre-emulsification semi-continuous seed emulsion polymerization process. By introducing specific modifiers A and B into the core and shell monomers, the low-temperature flexibility, frost resistance, tensile properties, and weather resistance of flexible ceramics are optimized.