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507results about How to "High glass transition temperature" patented technology

Preparation method of high-reaction-activity hydroxyl acrylic resin

The invention relates to a preparation method of high-reaction-activity hydroxyl acrylic resin. According to the invention, a solvent in a reactor is heated to a preset temperature under the protection of an inert gas; a mixture of a monomer component A with hard monomer as a main component (and comprising a small amount of soft monomer, hydroxyl monomer and carboxyl monomer) and an initiation agent is slowly added; a reaction is carried out for a certain period of time with maintained temperature; a mixture of a monomer component B with soft monomer as a main component (and comprising a small amount of hard monomer, hydroxyl monomer and carboxyl monomer) and an initiation agent is slowly added; and reaction is carried out for a certain period of time with maintained temperature, such that acrylic resin comprising hydroxyl is obtained. The invention has the characteristic that common monomers are adopted, and only the synthesis process is changed wherein monomer dropping sequence is changed, such that resin molecular structure is substantially changed, and the synthesized hydroxyl acrylic resin shows high reaction activity during a curing reaction. The method provided by the invention also has the advantages of low cost, simple process, and suitability for industrialized productions.
Owner:XI AN JIAOTONG UNIV +1

High-frequency resin composition and high-frequency circuit substrate manufactured by using same

The invention relates to a high-frequency resin composition and a high-frequency circuit substrate manufactured by using the same. The high-frequency resin composition comprises the following solid components: (A) an ethylene rhodanate compound with a molecule comprising at least two cyanato bases or a preformed polymer thereof; (B) active ester and (C) epoxy resin with a molecule comprising at least one arylidene alkyl. According to the weight parts of the solid components, the total weight of the ethylene rhodanate compound with the molecule comprising at least two cyanato bases or the preformed polymer thereof in the component (A) and the active ester of the component (B) is 10-70 parts by weight, the dosage of the epoxy resin with the molecule comprising at least one arylidene alkyl is 30-90 parts by weight in the component (C), and the weight ratio of the ethylene rhodanate compound with the molecule comprising at least two cyanato bases or the preformed polymer thereof in the component (A) and the active ester of the component (B) is 0.2-5:1. The high-frequency circuit substrate manufactured by using the high-frequency resin composition comprises a plurality of layers of mutually-stacked semi-solid pieces and copper foil which is respectively pressed on both sides of the semi-solid piece, wherein the plurality of layers of mutually-stacked semi-solid pieces comprise a base material and a high-frequency resin composition which is attached to the base material after being impregnated and dried.
Owner:GUANGDONG SHENGYI SCI TECH
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