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Abstract

The present application relates to a light diffusion material applied to secondary dimming of an LED lamp and a preparation method thereof. The light diffusion material for secondary dimming includes the following raw materials in percentage by weight: an A phase 94.09%, a B phase 2.91%, and a C phase 3%, where the A phase includes the following raw materials in percentage by weight: polydimethylmethylvinylsiloxane 55-95%, silicon dioxide 5-45%, hydroxyl-terminated polydimethylsiloxane 0-8%, and an additive 0-1%; the B phase includes the following raw materials in percentage by weight: silicon dioxide 70-80%, polydimethylsiloxane 10-20%, a 107 raw rubber 6-10%, and a dispersant 1.8-2.2%; and the C phase includes the following raw materials in percentage by weight: silicon dioxide 60-70%, polydimethylsiloxane 10-20%, a 107 raw rubber 6-10%, titanium dioxide 4-6%, a dispersant 5.88-7.78%, and a pigment 0.12-0.22%. By adding titanium dioxide to the light diffusion material of the lamp.

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