... .Particle Size D50:3-5 micron Zinc Borate For PVC Wall Paper Molecular formula: 2ZnO·3B2O3·3.5H2OMolecular weight: 434. ... high efficient flame retardant, it is widely used in plastic, rubber, coating etc fields.APPLICATION1. Zinc borate can be used as ... . Moreover, it is widely used in textile, fiber, floor, leather, wall paper, carpet, paint etc decorative materials to improve flame retardant ...