Bao Hua efficient transparent rare earth calcium zinc PVC stabilizer (national invention patent, replacing toxic and irritating organotin 18 1 methyl tin)
Bao Hua efficient transparent rare earth calcium zinc PVC stabilizer (national invention patent, thermal stability is three times that of toxic liquid barium zinc)
Bao Hua efficient transparent rare earth calcium zinc PVC stabilizer (national invention patent, thermal stability is 3 times that of ordinary liquid calcium zinc).