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UV Stabilizer

Additive Masterbatches:

UV Stabilizer:

Exposure to sunlight and some artificial lights can have adverse effects on the useful life of polyolefin products. UV radiation can break down the chemical bonds in a polymer. This process is called photo-degradation which causes cracking, chalking, colour changes and loss of such physical properties as impact strength, tensile strength, elongation and others.

UV Stabilizer Masterbatches are used to prevent the formation of free radicals, thus protecting the polymer chain from breaking. As a result, mechanical properties of the polymers are retained even after exposure to sunlight (outdoor application).

UV light is normally defined as wavelength of light within the region of 280-400nm, while visible light is within 400-800nm. UV light is then subdivided further into UV-A (the lower wavelengths, region around 310nm) and UV-B (slightly higher wavelengths region at around 350nm).

Sunlight intensity and composition varies according to latitude, atmospheric effects like humidity etc. So, it is important that the additive (or usually a combination of additives) is selected to suit the exact application, also taking into account the location that the final product will be used in and the required life span. Other factors that affect the choice of UV stabilization package include product dimensions, type and colour of pigments present and application-specifics such as food or pesticide contact.

UV Stabilizers are of two types:

A) UVA:

UVA Absorber slows down the degradation process by absorbing low wavelength UV radiation and dissipating it as thermal energy.

B) HALS:

HALS expands to Hindered Amine Light Stabilizer. HALS is a very effective and efficient stabilizer for polyolefin. They do not absorb UV radiation, but act to inhibit degradation of the polymer. This is a cyclic process wherein the HALS are regenerated rather than consumed during the stabilization process.

We use grades of U.V additives which are synergistic mixtures of UVA, HALS and some other UV additives which are based on high molecular wt. and high-performance HALS.

UV Stabilizer Masterbatches offered by Sri Vasavi Pigments (P) Ltd.

Product Name / Code

Carrier Resin

Active Ingredient

Application

LDR

Advantages

UV MB 01

(SV 91A001UVA) U.V 770

PE

10% Non-Food

Grade

Specifically, LDPE Lamination on PP Raffia

1% - 3%

Excellent light stabilizer at low cost.

UV MB 02

(SV 91B003 UVA) U.V. 770

PP

20% Non-Food

Grade

Same as UV MB 02

0.5% - 2%

Better cost performance ratio.

UV MB 04

(SV 91A004 UVA)

It is based on Chimassorb 944: Tinuvin 770 / equivalent grade

PE

10% Non-Food

Grade

LDPE, LLDPE, HDPE films, tapes and thick sections and for PP in fibers and film.

 

1% - 3%

The best UV Stabilizer for high Temperature & long service life.

UV MB 06

(SV 91A006 UVA)

It is based on Chimassorb 944: Tinuvin 622 / equivalent grade

PE

20% Food Contact Approval

LDPE, LLDPE, HDPE films, tapes and thick sections and for PP in fibers and film.

 for Food grade applications

0.5% - 2%

Better cost performance ratio.

UV MB 07

(SV 91B007 UVA)

Chimassorb 944: Tinuvin 770 / equivalent grade

PP

11.5%

PPR Pipes

2% Minimum

Specifically developed for PPR Pipes.

UV MB 08

(SV 91B008 UVA)

Chimassorb 944: Tinuvin 622 / equivalent grade.

PP

20% Food Contact Approval

PP Raffia, PP Molding

All general application of PP

0.5% - 2%

Better cost performance ratio.

UV MB 09

(SV 91B009 UVA)

It is based on Chimassorb 944: Tinuvin 770 / equivalent grade

PP

20% Non-Food

Grade

PP Raffia, PP Molding

All general application of PP

0.5% - 2%

Better cost performance ratio.

UVMB 11

(SV 91D011 UVA) U.V. 234

PET / PBT

12% Food Grade

PET / PBT Bottle

1% - 2%

Special develop for Inj. / Blow Moulding.

UV MB 12

(SV 91A012 UVA)

Special Chemical Resistance Grade

PE

15%

Green House Film, Shade net, Pound cover, Agriculture Film and Mulch Film etc.

2% - 5%

Chemical Resistance Grade.