Plastic Antioxidants

Today, it is nearly impossible for us to think of a world without plastics. Moreover with recent technological advancements in the plastics manufacturing and processing industry, plastics are being preferred over other materials such as metal, paper, wood, etc by one and all.

However, like everything else, plastics are also subject to degradation, which becomes particularly rapid if they are exposed to oxygen, heat and light. This leads to various problems such as loss of colour, strength, stiffness of flexibility etc., which can be collectively termed as degradation.

What is degradation and why does it happen?

Degradation is a generic term used to describe any change in the polymer properties when compared to the initial desirable properties.

Most commercial plastics are produced using controlled chain reactions to achieve molecules of desired properties. However, once the initial product is exposed to various physiological factors, chemical reactions start within the product and change its chemical and physical properties. The almost inevitable oxidation process starts a chain reaction, which speeds up the degradation unless a stabilizer is used.

Process Stabilizers

After polymerization most plastics are pelletized and shipped to compounders, polymer converters and subsequently to manufacturers of the final plastic article. During processing, the polymer undergoes a series of heating cycles, which usually involve extrusion of molten polymer. Each such cycle causes degradation, a result of the combined action of heat and oxygen. Process stabilizers are antioxidants that are used into the polymer to prevent such degradation during processing.

Krishna offers a range of liquid phosphites, which find application as antioxidants/ process stabilizers in the manufacture and processing of a wide variety of polymers such as:

PVC: Polycarbonates
Polyurethanes: Polyolefins
Polyethylene: Terephthalate
Nylon: Acrylics
ABS : Polystyrene

Phosphites provide a superior stabilization package that allows the processor to expand the range of processing conditions without losing desired physical properties due to degradation. They work as important co-stabilizers especially in combination with mix-metal stabilizers. In many countries, TNPP is approved in the manufacture of food packaging materials and is frequently combined with non-toxic Ca/Zn- Stabilizers.

We can pride ourselves with being India’s leaders in liquid phosphite chemistry. Following is our range of Aryl Organo, Aryl-Alkyl Organo and Alkyl Organo Phosphites.

Table of Liquid phosphites

Aryl Organo Phosphites
CRISTOL-TNPP Tris nonyl phenyl phosphite CAS No. 26523-78-4
CRISTOL-TNPP (HR) Tris nonyl phenyl phosphite + stabilizer CAS No. 26523-78-4
CRISTOL-TPP Triphenyl phosphite CAS No. 101-02-0
CRISTOL-DPP Diphenyl phosphite CAS No. 4712-55-4
Alkyl Organo Phosphites
CRISTOL-TLP Trilauryl phosphite CAS No. 3076-63-9
CRISTOL-TDP Tridecyl phosphite CAS No. 25448-25-3
CRISTOL-TTDP Tris (tridecyl) phosphite CAS No. 77745-66-5
CRISTOL-DPEDP Disteraryl Pentaerythritol Diphosphite CAS No. 3806-34-6
CRISTOL-DPEDP (HR) Disteraryl Pentaerythritol Diphosphite w/ < 1 stabilizer CAS No. 3806-34-6
Aryl-Alkyl Organo Phosphites
CRISTOL-DDPP Diisodecyl phenyl phosphite CAS No. 25550-98-5
CRISTOL-DPDP Diphenyl isodecyl phosphite CAS No. 26544-23-0
CRISTOL-DPOP Diphenyl octyl phosphite CAS No. 15647-08-2
CRISTOL-DPIOP Diphenyl isooctyl phosphite CAS No. 26401-27-4
CRISTOL-DPIOP Diphenyl triisodecyl phosphite CAS No. 60628-17-3
CRISTOL-THOP Tetraphenyl dipropyleneglycol di phosphite CAS No. 80584-85-6
CRISTOL-S34 Triisodecyl monophenyl dipropyleneglycol di phosphite