High-refractive-index yellowing-resistant LED packaging silica gel

• Main Authors: CHEN WEI, ZHUANG HENGDONG
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2016
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; SEMICONDUCTOR DEVICES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES

High-refractive-index yellowing-resistant LED packaging silica gel comprises a component A and a component B according to a weight ratio of 4:1. The component A comprises, by weight, 80-90 parts of methyl cyclohexyl vinyl silicon resin, 8-18 parts of modified organosilicon terminated with cycloalkenyl and with a main chain containing cyclohexyl and cycloalkyl structure, 0.1-0.3 part of platinum catalyst and 1-5 parts of adhesive; the component B comprises, by weight, 30-50 parts of modified organosilicon terminated with cycloalkenyl and with a main chain containing cyclohexyl and cycloalkyl structure, 50-70 parts of modified organosilicon terminated with chain extender silicon-hydrogen and with a main chain containing cycloalkyl structure and 0.1-0.3 part of inhibitor. The high-refractive-index yellowing-resistant LED packaging silica gel has the advantages that in molecular structural design of a formula, a benzene ring is not contained while a molecular structure with cyclohexyl contained in a main chain an