6 results about "Star polymer" patented technology

This invention discloses a four-armed star-shaped polymer containing a polyoxyethylene structure, its preparation method, composition, and applications. The polymer is prepared by mixing an unsaturated organic carboxylic acid compound, an unsaturated sulfonic acid compound, and water, stirring to obtain a reaction solution, and continuously stirring and heating the reaction solution. An aqueous solution of a polyether macromonomer compound and the initiator aqueous solution are added to the heated reaction solution, followed by polymerization and purification. The polymer structure contains a large number of carboxyl groups, sulfonic acid groups, and ether groups, as well as abundant polyoxyethylene groups and alkyl chains, giving the polymer good water solubility and excellent chelating properties for metal ions. The polymer prepared by this method shows good effects in cleaning, defoaming, and scale inhibition. Furthermore, compositions formed by combining the polymer with other corrosion and scale inhibitors exhibit good compatibility and can be used for scale inhibition in high-hardness water.

This invention relates to a self-compacting concrete and its preparation method, belonging to the field of concrete technology. The raw materials for the self-compacting concrete provided by this invention include cement, fly ash, slag powder, sand, crushed stone, a high-performance water-reducing agent, an air-entraining agent, and water. The high-performance water-reducing agent is obtained by blending a polycarboxylate water-reducing agent, an organosilicon-modified hyperbranched star polymer, and a polyether-modified organosilicon polymer. The air-entraining agent is obtained by compounding sodium dodecylbenzene sulfonate and sodium fatty alcohol polyoxyethylene sulfonate. The self-compacting concrete prepared by this invention has a high water reduction rate, low slump loss, and high stability, resulting in a significant improvement in overall performance.

This invention relates to the field of antitumor nanomedicine micelles, specifically to a charge-flipping amphiphilic star polymer, its preparation method, and its applications. The structural formula of the charge-flipping amphiphilic star polymer is shown in formula (I). This invention combines pH-responsive charge flipping, long circulation, and efficient cellular uptake with synergistic properties, as well as biodegradability, providing a new strategy to overcome the bottlenecks of traditional anticancer drugs in clinical applications. It is expected to achieve more precise drug release and higher treatment efficiency in tumor therapy.

The application discloses a kind of high transparent TPU hot melt adhesive film compositions and its production process, belong to high polymer material technical field.The composition contains TPU matrix, polymer modifier and the like component;Production process includes the synthesis of four-arm star polymer modifier, raw material vacuum dehydration, high-speed mixing, gradient temperature control extrusion granulation and gradient melting under nitrogen protection-quick cooling casting film.The application is to solve the defects of insufficient transparency, poor bonding durability and easy migration of the existing TPU hot melt adhesive film, proposes a star-shaped topological modifier design and a double covalent crosslinking synergistic scheme, realizes the molecular-level compatibility of the modifier and TPU, and finally obtains a hot melt adhesive film with high transparency, high bonding stability and excellent processing performance, suitable for optical device bonding and other high-end scenarios.

The application belongs to the technical field of cosmetics, and particularly relates to a water-soluble star-shaped polymer, a water-based sunscreen spray and a corresponding preparation method. An epoxy-terminated water-soluble star-shaped polymer is designed and synthesized, and a carboxyl-containing ultraviolet absorption group is grafted onto the epoxy-terminated water-soluble star-shaped polymer to obtain a water-soluble star-shaped polymer with a terminal grafted ultraviolet absorption group. The polysiloxane core segment provides film-forming property and hydrophobicity, the polyoxyethylene ether (EO) side chain provides water solubility, and the ultraviolet absorption group grafted at the end of the side chain provides a sunscreen effect, so that high sunscreen effect and high waterproof and sweatproof effect are achieved.