Polymers Used in Coating

Polymer	Advantages	Disadvantages	Products
PVC	Versatile material Good inherent FR Good oil, solvent resistance Heat and RF weld able for good watertight seams	Cracks when cold Moderate heat and age resistance Plasticizers migration	Tarpaulins covering, large tents, and architecture uses. Seat upholstery Lather cloths Protective clothing Leisure products, banner, bunting,
PVDC Polyvinylidene chloride	Very good FR Low gas permeability Heat weld able,clear,high gloss	Hard and brittle	Blends with acrylics to improve FR in coating
PU Polyurethane	Tough good extensibility God weathering abrasion resistance	Moderate FR Relatively expensive Limited hydrolysis resistance	Waterproof protective clothing Aircraft life jackets
Silicon	Odorless, inert, good resistance to chemical and micro-organism High tear resistance and puncture resistance Low toxicity, water repellant Some breath ability Temp service range from – 60 to 200 oC	Attracts oily soiling Seaming is difficult due to release properties Expensive Difficult to print or apply artwork	Lightweight covering, tarpaulins, Sacks FIBCs, bulk bags Airbags Food, medical application Gaskets, seats Parachutes Oven curtains
PTFE	Excellent resistance to acid, alkalies, chemicals, Solvent, oil, oxidation and weathering Non sticks properties Temp service upto 260 oC	Very expensive	Architecture application calendar belts Food and medical uses Gaskets, seals
Natural rubber	Excellent stretch and flexibility Working temp upto 70 oC Many properties obtained by blending	Moderate sunlight and oxidative resistance Moderate solvent and oil resistances	Carpet backing Tyres Life crafts Conveyer belts Protective clothing Escape churtes
Styrene butadiene rubber	Similar to natural rubber but somewhat better resistances to abrasion flexing and microrg	Similar to natural rubber	Carpet backing
Nitrile rubber	Good oil resistance, which increases with acrylonitrile content. Better resistance to sunlight and heat.	Limited fire resistances	Oil resistance clothing, belts and items handling oily or greasy product
Butyl rubber	Low permeability to gases, better resistances to heat and chemical, oxidation.	Solvent resistance limited, FR resistances, seaming difficult	Air cushion, pneumatic spring, protective clothing for chemical and acid. Light weight jacket, life rafts