Adding SiO2 particles with a mass fraction of 20 × 10 - 6 to 10 % and a diameter of 3 to 100 nm in the esterification or transesterification process can improve the heat resistance and air impermeability of saturated polyesters (eg PET). This polyester can be used to make plastic containers and bottles. For example, 100 parts of DMT and 64 parts of EG in the presence of SiO2 with a particle diameter of 5 nm and 0.03 parts of trimethyl phosphate and 2 parts of EG are heated in a reactor at 130-230[deg.] C. for 4 h, ie, PET can be made for the manufacture of food and beverage packaging containers and bottles.
DE 10250401

Liquid Glue

Liquid Glue, Clear Liquid Glue, Liquid Glue Sticks, Liquid Glue Pens