7 results about "Star-shaped polymer" patented technology

The invention discloses a binder for a silicon-based negative electrode and a preparation method and application thereof, the binder for the silicon-based negative electrode provided by the invention has a dynamic covalent cross-linked network structure, and comprises a star polymer composed of a core part and an arm part, the three-dimensional cross-linked network is formed by cross-linking the arm parts of the star polymer through dynamic covalent bonds and ion coordination bonds. The adhesive provided by the invention comprises a star polymer and a three-dimensional cross-linked network formed in the star polymer, and by constructing a three-dimensional network with high strength, high toughness, rapid self-repairing capability and excellent interface stability at the same time, dynamic covalent bonds and ion coordination bonds are utilized to synergistically act in charge and discharge processes, so that the self-repairing performance of the adhesive is improved; and stress dissipation and network self-repairing are realized, so that the volume effect problem of the silicon-based negative electrode is solved.

The invention discloses a low-temperature-resistant creep-resistant acrylic pressure-sensitive adhesive as well as a preparation method and application thereof. The invention discloses a low-temperature-resistant creep-resistant acrylic pressure-sensitive adhesive. Comprising the following components in parts by weight: 40 to 50 parts of 2-ethylhexyl acrylate, 25 to 35 parts of butyl acrylate, 10 to 15 parts of methyl methacrylate, 5 to 10 parts of vinyl acetate, 2 to 3 parts of acrylic acid, 0.5 to 1 part of hydroxyethyl acrylate, 0.5 to 2 parts of a functional aid, 0.5 to 1.5 parts of an isocyanate curing agent, 0.1 to 0.3 part of an initiator and 100 to 150 parts of a solvent, wherein the functional aid is a star-shaped polymer which takes pentaerythritol as a core and has a plurality of polyacrylate chain segments, and the chain ends of the star-shaped polymer are provided with epoxy functional groups. The low-temperature-resistant creep-resistant acrylic pressure-sensitive adhesive disclosed by the invention has excellent initial adhesion and peel strength in a low-temperature environment, also has high cohesive force at a relatively high temperature, and can effectively resist creep displacement under long-term shear stress.

The present invention relates to a multistage radical emulsion polymerization process for producing a polymer dispersion of discrete particles dispersed in water, thereby producing a novel star shaped polymer composition, where the wet and dry properties of the dispersion polymer obtained by radical emulsion polymerization in water are modified. The present invention also relates to its use in coating, textile and adhesive applications.

The application provides a water-setting film and a preparation method and application thereof, relates to the technical field of electronic device protection materials, and the water-setting film comprises a substrate layer and a structural adhesive layer; the structural adhesive layer comprises an interpenetrating copolymer network, the interpenetrating copolymer network comprises a first three-dimensional crosslinked network formed by intermolecular crosslinking and curing of a first polymer and a second three-dimensional crosslinked network formed by intermolecular crosslinking and curing of a second polymer; the first polymer comprises a linear polymer, and the linear polymer comprises a first polymerizable functional group; the second polymer comprises a hyperbranched polymer and / or a star-shaped polymer, and a terminal end of the second polymer comprises a second polymerizable functional group which is complementary to the first polymerizable functional group; and a covalent bond is formed between the first three-dimensional crosslinked network and the second three-dimensional crosslinked network through reaction of the first polymerizable functional group and the second polymerizable functional group. The water-setting film has high peeling force, high light transmission and low haze, excellent cohesive property and strong pressure self-repairing capability.

This invention relates to an aqueous wetting and dispersing agent and its preparation method. The dispersing agent comprises a star-shaped polymer, functional carbon dots, a synergist, and deionized water. The star-shaped polymer is prepared by using pentaerythritol as a starting agent to prepare a six-arm initiator, and using MAA, HEMAP, and PEGMA as comonomers, and polymerizing under ATRP initiation conditions. The functional carbon dots are obtained by preparing carbon dots through hydrothermal reaction using citric acid, chitosan, and L-cysteine ​​as raw materials, followed by the reduction of silver ammonia to deposit silver ions on the surface of the carbon dots. The synergist is modified montmorillonite, which is obtained by intercalation modification of organomontmorillonite with acryloyloxyethyltrimethylammonium chloride, followed by polymerization reaction with acrylamide and 2-acrylamidododecyl sulfonic acid. In this invention, the star-shaped polymer is the main material, achieving efficient dispersion and rapid wetting of pigments and fillers; the functional carbon dots contain chitosan and are deposited with silver ions to provide continuous contact antibacterial properties; the synergist enhances the stability of the composite structure.

New star-shaped polymers comprising graft copolymer backbone arms, which e.g. are useful for delivering active agents and / or imaging agents to target cells or tissues.