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Estabilizador de PVC

1. Description of WELLSTAB™ series PVC Compound Stabilizer

PVC stabilizers are used to prevent degradation of polyvinyl chloride (PVC) by heating, oxygen and ultraviolet, etc. especially during processing, but also in applications.

The choice of stabilizers depends on processing technologies, cost, relevant legal restrictions and requirements of the finished PVC products. By combining with lubricants, auxiliary stabilizers, antioxidants, anti-ultraviolet agents and other additives, our stabilizer portfolio provides suitable and efficient solutions for a variety of PVC processing requirements.

WELLSTABTM is the trade name of SUNDOW stabilizer and is sold in the form of a compound stabilizer (One-Pack). It can be precisely adjusted according to the performance requirements of the final product to meet a very wide range of product and performance requirements.

There are two main series of WELLSTAB™ stabilizers:

Ø  WELLSTAB™ SP series --- lead based compound stabilizers

Ø  WELLSTAB™ CZ series --- calcium-zinc based compound stabilizers

2. WELLSTAB™ SP series——Lead based compound stabilizers

Lead based compound stabilizers are generally used in combination with lead soaps, calcium soaps, lubricants and antioxidants, etc. They can be used in PVC pipes, fittings, profiles, decorative panels, boards, shutters, wire & cables, etc.

u  WELLSTAB™ SP series products

Table 1 the selection guide of SP series for PVC products

Wellstab™

Grade

Appearance

PbO Content

(%)

Recommended

Dosage(phr)

Product

Features

Typical   Application

SP-500

White or yellowish flake

28.0±1.0

1.5-5.5

Good thermal stability and lubrication   effect; good weather resistance and good whitening effects

PVC pipes

SP-603

White   or yellowish flake

35.0±1.0

3.5-6.5

Good thermal   stability and lubrication effect; Good demoulding and quick plasticizing

PVC fittings

SP-102H

White   or yellowish flake

36.0±1.0

4.0-6.0

Good thermal   stability and lubrication effect; good processability and chemical stability;   high Pb content

Outdoor   PVC profiles

SP-102L

White or yellowish flake

29.0±1.0

2.0-5.0

Good thermal   stability and lubrication effect; good weather resistance and good whitening   effects; low Pb content

Indoor   PVC profiles

SP-202F

White or yellowish flake

32.0±1.0

2.5-6.5

Good thermal   stability and lubrication effect; good processability and chemical stability

PVC   foam boards

SP-900

White or yellowish flake

31.5±1.0

5.0-7.0

Good   processability and aging resistance

70℃ insulated and sheathed cables &   wires

SP-901

White or yellowish flake

40.0±1.0

5.0-7.0

Good   thermal stability and aging resistance

90-105℃ insulated and sheathed cables &   wires

RemarkAbove is just part of our grades, if you want to know further information or more grades, please contact [email protected].

u  The major properties of lead based compound stabilizers include:

• Excellent heat stability

• Good electrical properties

• Excellent light resistance

Wide processing window

Good cost-performance

No detrimental effects on the Vicat softening temperature of rigid PVC

• Low solubility in water, no leaking into the environment

• No odor during processing and in the final product

Low water absorption

• Lead compounds are chronically toxic to biology

• Not suitable for transparent products, discolour in contact with sulphur-containing compounds

u  Application

They can be used in PVC pipes, fittings, profiles, decorative panels, boards, shutters, wire & cables, etc

 

3. WELLSTAB™ CZ series——Ca/Zn based compound stabilizers

Ca-Zn based compound stabilizers are made by combining Ca-Zn salt stabilizers with auxiliary stabilizers, lubricants, anti-oxidants, anti-ultraviolet agents and other additives. In general, they are in powder form. Calcium Zinc Stabilizers are also suitable for nontoxic and food grade PVC items that require FDA and/or similar approval, under food regulatory acts.

u  WELLSTAB™ CZ series products

Table 2 the selection guide of CZ series for UPVC products

Wellstab™

Grade

Appearance

Recommended

Dosage(phr)

Product

Features

Typical Application

CZ-505S

White   or yellowish Powder

3.5-5.5

General   grade. Excellent initial coloring; Good thermal stability and lubricant   effect; Excellent dispersibility

PVC   water supply pipes

CZ-505D

White   or yellowish Powder

2.5-4.5

Good   thermal stability and lubricant effect; Excellent initial coloring

PVC   draining pipes

CZ-506

White   or yellowish Powder

4.5-6.4

Good   thermal stability and lubricant effect; Excellent   initial coloring and color stability; Good demoulding and quick plasticizing

PVC fittings

CZ-507W

White   or yellowish Powder

4.0-5.0

Good   thermal stability and lubrication effect; Excellent UV resistance

PVC   window profiles

CZ-507E

White   or yellowish Powder

4.0-6.0

Good   thermal stability and balanced internal and external lubrication

PVC   edge banding

CZ-508F

White   or yellowish Powder

3.0-10.0

Good   thermal stability and lubricant effect; excellent dispersibility

PVC   foaming boards

CZ-508W

White   or yellowish Powder

3.0-5.0

Good   thermal stability and coloration

PVC   WPC, SPC, etc

 

Table 3 the selection guide of CZ series for PVC Wires & Cables

Wellstab™

Grade

Appearance

Recommended

Dosage(phr)

Product Features

Typical application

CZ-501A

Powder

3.0-6.0

Good thermal stability and initial   coloring, meet the standard requirement of UL70

For 70 light color wire/cable

CZ-501B

Powder

3.0-6.0

Good   thermal stability and initial coloring, meet the standard requirement of UL70

For   70   dark color wire/cable

CZ-502A

Powder

3.0-6.0

 Good thermal stability and initial coloring,   meet the standard requirement of UL90

For 90 light color wire/cable

CZ-502B

Powder

3.0-6.0

Good   thermal stability and initial coloring, meet the standard requirement of UL90

For   90   dark color wire/cable

CZ-503A

Powder

6.0-10.0

Excellent thermal stability and initial coloring,   meet the standard requirement of UL105

For 105 light color wire/cable

CZ-503B

Powder

6.0-10.0

Excellent   thermal stability and initial coloring, meet the standard requirement of UL105

For   105   dark color wire/cable

RemarkAbove is just part of our grades, if you want to know further information or more grades, please contact [email protected].

u  The major properties of PVC compounds incorporating Ca-Zn based compound stabilizers include:

Ø   Environment-friendly, no harmful and no heavy metal, safe and sanitary

Ø   Good mechanical and electrical properties

Ø   Good initial color and excellent long-term stability

Ø   Excellent organoleptic properties and good outdoor weatherability

Ø   Suitable for transparent products

Ø   No sulphur-staining

Ø   Good thermal stability

Ø   Lower density than that of lead based stabilizers

Ø   No polluting, not react with lead salt, organotin and other heat stabilizers

u  Application

They are largely used in PVC pipe & fitting, profile, electric wire and cable, artificial leather, medical tube and part, flooring, footwear, film, board/sheet and many other applications.

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