Liquid compound stabilizer for PVC
1. Liquid barium cadmium and liquid barium cadmium zinc composite stabilizer
This type of compound stabilizer is mainly used in the processing of soft PVC products, the basic components include:a
(1) barium salt – can be barium alkylphenol, barium 2-ethylhexanoic acid, barium lauric acid, barium benzoate and replace barium benzoate, barium neodecanoate and so on. The barium salt makes up 6-7% of the complex, i.e., the ratio to the cadmium salt is about 2:1-32 (in terms of metal, weight percent, hereinafter).
(2) Cadmium salts – may be cadmium 2-ethylhexanoate, cadmium laurate, cadmium oleate, cadmium phenyl and substituted benzoate, cadmium naphthenate, cadmium neodecanoate, and so on. Cadmium salts account for about 3-4% of the complex.
(3) Zinc salts – may be zinc 2-ethylhexanoate, zinc laurate, zinc naphthenate, zinc neodecanoate, zinc benzoate and substituted benzoate, and so on. Zinc salts make up 0.5-1% of the complex.
(4) Phosphite – may be triphenyl phosphite, diphenyl monooctyl phosphite, diphenyl monodecyl phosphite, tris(nonylphenyl) phosphite, and the like. The phosphite makes up about 15-20% by weight of the complex and is used as a chelating agent.
(5) Other – including a small amount of 2,6 – di-tert-butyl-p-cresol, bisphenol A, nonylphenol and other phenolic antioxidants and ultraviolet absorbers, as well as liquid paraffin, white oil, diesel oil, spindle oil and other mineral oils as solvents, and in addition to a small amount of advanced alcohols and other defoamers.
Liquid barium, cadmium and zinc composite stabilizers due to the composition of different properties are also different. However, it is generally a light yellow to yellow clear liquid, with specific gravity of 0.95-1.02 at room temperature, viscosity less than 100 centipoise, and solidification point at -15℃. Liquid barium cadmium and liquid barium cadmium zinc are similar, both have excellent thermal and light stability, small initial coloring, good transparency and color stability. Their stabilizing effect is stronger than the solid composite soaps, so the dosage can be reduced, generally 2-3 parts, dust poisoning will not occur, and in general plasticizers are completely soluble, have good dispersion, precipitation tendency is small. One of the liquid barium cadmium zinc initial coloring than liquid barium cadmium smaller.
2. Liquid barium-zinc complex
Generally light yellow to yellow-brown oily liquid, specific gravity at room temperature 1.0-1.1, good heat resistance, not subject to sulfide contamination, and epoxy plasticizers and can improve the stabilization effect, it has an activating body for foam.
3. Liquid calcium-zinc complex
Non-toxic liquid calcium and zinc stabilizers are mainly composed of calcium stearate, calcium ricinoleate, zinc stearate, zinc ricinoleate, as well as epoxidized soybean oil, ultraviolet absorber. Liquid rest calcium and zinc stabilizers are generally selected more soluble in organic solvents with less carbon number of fat fat calcium and zinc salts.
Due to the different components, properties vary, generally light yellow to yellow clear oily liquid, specific gravity at room temperature is 1.0-1.05. It is a non-toxic stabilizer of PVC, mainly used as food packaging film, utensils and foam artificial leather stabilizer.
It is a non-toxic stabilizer of PVC, mainly used as stabilizer for food packaging film, utensils and foam artificial leather.
