CTPB is a liquid polybutadiene rubber with carboxyl groups at both ends of the molecule, which has excellent cold resistance and elasticity. The carboxyl end groups can react with epoxy resin, which has a good toughening effect on epoxy resin. Compared with CTBN, CTPB has lower viscosity, better low-temperature performance and flexibility. The CTPB mainly used as a toughening agent for epoxy resin adhesives and sealants, it can also be used separately for manufacturing sealing materials, adhesives, coatings, elastic fibers, and artificial materials Leather, rubber modifiers, etc. As propellant  Packed in 50kg/drum, 170kg/drum, The storage period is 1 year. Safety instructions: Storage should be at cool, dry and ventilate. The best condition is among -20 ~ 38℃. Shelf life of 12 months, if expire, still used if up to standard through retest. When transportation should avoid rain, sunlight. Don’t mix with strong oxidizer. ITEM CTPB-1 CTPB-2 CTPB-3 CTPB-4 CTPB-5 Carboxyl value(mmol/g) 0.40 - 0.47 0.68 - 0.75 0.65 - 0.70 0.71 - 0.80 0.81 - 1.00 Viscosity (40℃,Pa.S) ≤15 ≤12 ≤4.0 ≤3.5 ≤3.0 Moisture,wt% ≤ 0.05 0.05 0.05 0.05 0.05 Functionality 1.75 - 1.95 1.90 - 2.10 - - - Molecular weight 4100 - 4500 2800 - 3400 3000 - 3600 2700 - 3300 2400 - 2800 * In addition：We can research and develop any new version of CTPB according to the special demand of our clients． 1.    HTPB Solid Propellant Hydroxyl-Terminated Polybutadiene HTPB CAS 69102-90-5 2.   EHTPB / Epoxidized hydroxyl-terminated polybutadien 3.   CTPB / Carboxyl-terminated polybutadiene CAS 586976-24-1 4.   ATPB / Amino-terminated polybutadiene 5.    HTBS / HTPB-styrene copolymer 6.    HTBN / Hydroxy-terminated liquid nitrile butadiene rubber 7.    ATBN / Amino-terminated liquid nitrile butadiene rubber 8.   MLPB / maleic polybutadiene 9.    CTBN / Carboxylated- terminated liquid acrylonitrile rubber 10.  Pure MDI 99.5% CAS 101-68-8 11.   IPDI(Isophorone Diisocyanate) 12.   DDI(Dimeryl Diisocyanate) 13.   AP(Ammonium perchlorate) 14.   NDI(1,5-Naphthalene Diisocyanate) CAS 3173-72-6 15.   MAPO Tris-1-(2-Methylaziridinyl)Phosphine Oxide CAS 57-39-6 16.   IPDI(Isophorone Diisocyanate) 17.   TODI CAS 91-97-4 18.   Desmodur RE 19.   RFE  20.   Desmodur RC/ TDI-Bases Polyisoyanurate（RC） 21.   RN 22.   Octylferrocene Cas 51889-44-2 23.   Boron Nitride(BN 99%) 24.   Triphenyl Bismuth CAS 603-33-8 25.   Nitrogen Atomized Spherical Al Powder/ aluminite powder 26.  8-methylnonyl nonan-1-oate(Isodecyl Pelargonate) CAS 109-32-0 27.  Ferrocene Cas 102-54-5 28.  MOCA / 4,4′-Methylenebis(2-Chloroaniline) CAS 101-14-4 29.  Tetramethylxylylene Diisocyanate TMXDI (META) Cas 2778-42-9 30.  etc.....