| abstract |
The invention discloses a low-smoke high-toughness halogen-free flame-retardant PBT/PTT composite, and a preparation method and application thereof. The low-smoke high-toughness halogen-free flame-retardant PBT/PTT composite comprises the following components: polybutylene terephthalate, polytrimethylene terephthalate, a halogen-free flame retardant, vinyl modified polysiloxane, glass fiber, epoxy resin, boehmite, kaolin, magnesium stearate and an antioxidant, wherein the weight ratio of PBT to PTT is (1-6) to 1; the halogen-free flame retardant is a compound of organic aluminum hypophosphite and melamine polyphosphate. The PBT/PTT compound has extremely low smoke density and excellent toughness, and the smoke density reaches grade 2 of the smoke density required by EN45545-2 standard. |