chemical composition of natural rubber

{"cid":"91189030","title":"Black Neoprene Coated Glass Cloth For Flexible Connector Weather Proofing Material","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/46\/db\/1cc36c2f9703aea0864f06f37da4-200x200-1.jpg","attrs":{"Brand Name":"SUNTEX","Model Number":"GF200P-NE265-4001","Minimum Order Quantity":"20 rolls","Delivery Time":"5-20 days","Certification":"","Place of Origin":"China","Payment Terms":"T\/T; L\/C, Paypal...","Supply Ability":"500000sqm\/month","Packaging Details":"Each roll in carton, several cartons in a pallet","Temperature resistance":"From -50 C to 550 C","Weight":"500 G\/M2","Thickness":"0.35 mm or OEM","Coating":"Neoprene","Width":"1.5m","Color":"Black","Roll length":"50 meter","Origin":"China","Main market":"Mid-east \/ Europe","Application":"Air condition system"}}