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3 results about "Polypropylene glycol" patented technology

Polypropylene glycol or polypropylene oxide is the polymer of propylene glycol. Chemically it is a polyether, and, more generally speaking, it's a polyalkylene glycol (PAG). The term polypropylene glycol or PPG is reserved for low to medium range molar mass polymer when the nature of the end-group, which is usually a hydroxyl group, still matters. The term "oxide" is used for high molar mass polymer when end-groups no longer affect polymer properties. In 2003, 60% of the annual production of propylene oxide of 6.6×10⁶ tonnes was converted into the polymer.

High-bonding-strength conductive adhesive for repairable microelectronic assembly and preparation method thereof

InactiveCN112694851AImprove electrical performanceEpoxy resin adhesivesElectrically-conducting adhesivesPolymer scienceEthyl group
The invention relates to a high-bonding-strength conductive adhesive for repairable microelectronic assembly and a preparation method thereof. The high-bonding-strength conductive adhesive comprises the following raw materials in percentage by weight: resin, conductive filler, a curing agent, an active diluent and an additive, wherein the resin is prepared from the following raw materials in percentage by weight: bisphenol A epoxy resin and bisphenol F epoxy resin; the conductive filler is prepared from the following raw materials in percentage by weight: flake silver powder and spherical silver powder; the curing agent is prepared from the following raw materials in percentage by weight: 2-ethyl-4-methylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, polyether amine 400 and triethanolamine; the reactive diluent is prepared from the following raw materials in percentage by weight: polyethylene glycol diglycidyl ether and polypropylene glycol diglycidyl ether; and the additive is a substance capable of achieving a thickening effect. The problems that an existing conductive adhesive is poor in conductivity, poor in bonding strength, incapable of being detached and repaired after bonding and the like are solved. The adhesive is widely applied to bonding materials for circuit connection of electronic components.
Owner:CHINA ZHENHUA GRP YUNKE ELECTRONICS

Anti-yellowing leather finishing emulsion

InactiveCN111004556AEfficient captureAvoid oxidation reactionsCoatingsPolymer sciencePolypropylene glycol
The invention discloses an anti-yellowing leather finishing emulsion, which is prepared from the following raw materials in parts by weight: 65 to 80 parts of a modified polyacrylate resin, 1 to 3 parts of polydimethylsiloxane, 0.5 to 1.5 parts of an antifoaming agent, 0.5 to 1.5 parts of a leveling agent, 1.5 to 3 parts of silicon dioxide, 5 to 8 parts of polypropylene glycol and 10 to 20 parts of deionized water. According to the invention, the polyacrylate resin is modified, and the anti-yellowing modifier is prepared, is introduced into the polyacrylate resin in a cross-linking manner, andis firmly connected into the resin in a chemical bond manner, so that the polymers in a leather coating are effectively protected from an oxidation reaction, the good scrubbing resistance is achieved, and leather can resist yellowing for a long time.
Owner:王磊
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