Short-term high-temperature resistant acrylic-based composition and method for preparing heat conducting fin by using same
An acrylic-based, short-term high-temperature technology, applied in the direction of polymer adhesive additives, film/sheet adhesives, non-polymer adhesive additives, etc., can solve the problem of no obvious change in surface viscosity and thermal conductivity, There is no mention of the softness and hardness of the acrylic heat conduction sheet, and the effect of good softness and hardness is achieved
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[0040] Prepolymer preparation: add a certain amount of 2-hydroxy-2-methyl-1-phenyl-1-acetone to 100 parts of 2-ethylhexyl acrylate monomer or 2-ethylhexyl methacrylate , A certain portion of phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide, under a 16-20W ultraviolet curing lamp, stir and irradiate, remove the ultraviolet curing lamp after 3-10 minutes A prepolymer with a viscosity of 3000-5500cps is obtained. Or add a certain amount of lauroyl peroxide to 100 parts of 2-ethylhexyl acrylate monomer or 2-ethylhexyl methacrylate, stir in an oil bath at 100°C for 5-15 minutes, and remove the oil bath. A prepolymer with a viscosity of 2000-5000cps can be obtained.
[0041] Preparation of adhesive: add 0.05 to 1 part of monomer with two or more acrylic functional groups to 100 parts of the prepared prepolymer, and then add 0.2 to 0.5 part of free radical initiator. Stir at a temperature of ℃ and dissolve it.
[0042] Fill 8 to 33 parts of adhesive and 1 to 3 parts of heat-resistant...
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