Sanduvor VSU Training

Business Line Plastics Additives

UV Absorber

Sanduvor VSU

NN

O

H

HO

O


Sanduvor VSU Physical Properties

Appearance white crystallinepowder

Melting Point (DSC) 124 - 128 °C

Solubilities at 20°C [g/100 ml solvent] :

Acetone ~ 2.8Ethanol ~ 0.2Ethyl acetate ~ 2.9Toluene ~ 4.8Water ~ 0.1

Volatility (TGA)Weight Loss (N2, 10°C/min) 10% at 270°C

Chemical Structure

2-Ethyl,2’-ethoxy-oxalanilide

Molecular formula C18H20N2O3

Molecular Weight 312.37 g/mol

CAS Registry No. 23949-66-8

NN

O

H

HO

O


RH (Ch) RH (Ch*) R· ROO·

RHROOH

O2

RO· + ·OHRH

h�

General diagram for autooxidation of hydrocarbons(photoinitiated degradation)


UV AbsorbersBase requirements for an effective UV Absorber:

- Effective dissipation of the absorbed energy in a non-photosensitizingway (inherent light stability of the UV absorber molecule itself)

- High absorptivity in the sensitive UV region

- Minimal sensitivity to side reactions with / in the matrix (e.g. undesirable stabilizer consumption, discoloration, etc…)

- High persistence in the stabilized polymer matrix (minimal physical losses, good compatibility with the polymer)



- Effective dissipation of the absorbed energy in a non-photosensitizing way (inherent light stability of the UV absorber molecule itself)





UV Absorption data of selected stabilizersUV Absorber

��1 [l/mol.cm] /(�max1 [nm])

��2 [l/mol.cm] /(�max2 [nm])

Hostavin PR-25 24.200 / (308) -

Benzophenone 531 9.600 / (327) 16.400 / (286)

Benzotriazole P 16.900 / (344) 14.400 / (298)

Benzotriazole 234 16.400 / (349) 15.800 / (303)

Sanduvor VSU 16.700 / (298) -

HPT 1164 22.400 / (344) 39.400 / (290)


0

0,2

0,4

0,6

0,8

1

1,2

220 240 260 280 300 320 340 360 380 400

Absorption

Wavelength [nm]

UV absorption spectra of Sanduvor VSU

Solvent : CyclohexaneCell : 1.0 cmConcentration : 16.8 mg/l



- Effective dissipation of the absorbed energy in a non-photosensitizing way (inherent light stability of the UV absorber molecule itself)





Original color of the UV absorber solutions(to: Interaction of UV Absorbers with metal ions)

HydroxyphenyltriazinesHydroxyphenylbenzotriazoles

Hydroxybenzophenones

Oxalanilide (VSU)CyanoacrylateBenz.malonate (PR-25)

Business Line Plastics AdditivesInteraction of UV Absorbers with metal ions

(some additives form color complexes or solid precipitates)Dichloromethane solution: 500 ppm UV absorber in the presence of 100 ppm Ti (IV)

HydroxyphenyltriazinesHydroxyphenylbenzotriazoles

Hydroxybenzophenones

Oxalanilide (VSU)Cyanoacrylate

Benz.malonate (PR-25)


Light stabilization of PA-6 by UV AbsorbersInitial color

Injection molded plaques (1 mm thick) from PA-6 semi dull

Benzophenone Benzotriazole Oxalanilide

UV-531c UV- 234 Sanduvor VSU

Additives: 0.5% UVA


Light stabilization of PA-6 by UV AbsorbersInitial color

Benzophenone Benzotriazole Oxalanilide

Injection molded plaques (1 mm thick) from PA-6 semi dull Additives: 0.005%Cu2+ + 0.5% UVA

UV-531 UV 234 Sanduvor VSU


Applications Field

* Engineering Plastics (e.g. Polyamides, Polyesters)

* Polyolefines (e.g. PP Tapes)

* Rigid PVC


3

5

7

9

11

13

15

17

None BS

0.6% H

ALS 94

40.6

% S-E

ED

0.6% V

SU0.3

% HALS

944

0.3% S

-EED

Yellowness Index (1 mm I.M. Plaques) Original YI : 3.5

Light Stabilization of Polyamide CopolymerAccelerated Weathering - 1500 hours in WOM (DIN 53 387 A)

+ 0.3% VSU

BS : 0.2% I-1098


0

20

40

60

80

100

120

None BS

0.6% H

ALS 94

40.6

% S-E

ED

0.6% V

SU0.3

% HALS

944

0.3% S

-EED

Retained Tensile strength (%)

+ 0.3% VSU

BS : 0.2% I-1098

Light Stabilization of Polyamide CopolymerAccelerated Weathering - 1500 hours in WOM (DIN 53 387 A)


0 5 10 15 20

Sanduvor VSU

UV 234

none

Light Stabilisation of PA-12Accelerated Weathering - 1500 hours in WOM (DIN 53 387 A)

Yellowness Index

PA-12 Injection moulded plaques, 1 mm thickBS : 0.05% Hostanox O 10 + 0.5% UV absorber


020406080

100120140160180

0 5 10 15 20 25 30 35 40 45 50 55 60 65

Time to Heat Exposition [days]

Rem

aine

d Im

pact

Stre

ngth

[%] VSU, Phenol, Phosphite HALS, Phenol, Phosphite Cuivre Non Stabilisé

Exposure conditions : 1 mm IM PA plaques exposed at 130°C

Heat Stability of PAMechanical properties after exposition at 130°C


10 12 14 16 18

Sanduvor VSU

UV 234

none

Light Stabilisation of PolyestersAccelerated Weathering - 600 hours in WOM (DIN 53 387 A)

Original YI = 10

Yellowness Index

PBT Compression moulded plaques, 0.5 mm thickBS : 0.1% Hostanox O 10 + 0.5% UV absorber


Applications Field



* Rigid PVC


100

28

0

20

40

60

80

100

120

1 2

1 = prior to exposure2 = after exposure

Light Stabilisation of PP Tapes200 hs QUV-B irradiation cycle: 8 hs radiation, 60°C, 4 hrs condensation 50°C

Tensile strength of the finished tapes

Stabilisation : With/ without conductive carbon black; 0.25% Hostavin N 30 or HALS 944 + 0.15%Hostanox O 3

Tape type : 270 g tapes, 1:10 oriented, black and nature


100

76

0

20

40

60

80

100

120

1 2

[%] r

el. Basic stabilization +

0.1 % Sanduvor VSU

1 = prior to exposure2 = after exposure

Light Stabilisation of PP blown films200 hs QUV-B irradiation cycle: 8 hs radiation, 60°C, 4 hrs condensation 50°CTensile strength of the finished tapes

Basic stabilisation : With/ without conductive carbon black; 0.24% Hostavin N 30 + 0.16%Hostanox O 3


020406080

100120140160

0 50 100 150 200 250Time of UV-B exposition [h]

Variant A (0,16%N30 + 0,075%VSU) Variant B (0,18%N30 + 0,04%VSU)Remaining Tensile Strenght [%]

Limit = 50%

Customer results : Light Stability of PP TapesMechanical properties after UV-B exposure

Exposure conditions according to prEN 1898 : UV-B irradiations for 200 h, 8 h radiation at 60°C,alternating 4 h condensation at 50°C. Loss of mechanical properties < 50% after minimum144 h exposure


Applications Field



* Rigid PVC


400 600 800 1000 1200

PR-31 + VSU ( 1 / 1)

Hostavin PR-31

Sanduvor VSU

Uvinul 3039

none

Light Stabilisation of pigmented rigid PVCAccelerated Weathering - 600 hours in QUV-A (ASTM D 5208-91)

Time to �E = 5 (Hours)

Orange-pigmented rigid PVC pressed plaques, 2 mm thickLS content : 0.5%


06

1218243036

0 500 1000 1500 2000 2500 3000

Hours in WOM CI65 wet

Yello

wne

s In

dex

Reference 0.5% Tinuvin 571 0.5% Tinuvin 320 0.5% Sanduvor VSU 0.5% Tinuvin P

Base Stabilization: Ca/Zn based. Plasticizer: DINP, 0.1% oxidized PESample Thickness: 1.0 mm

Light Stabilisation of System containing NO Pigments


Recommendations

Polyolefines

PP Tapes : 0.07 - 0.1% Sanduvor VSU + 0.15 - 0.25% Hostavin N 30

* Generics : Tinuvin 312

* Alternatives : Tin P, Tin. 320, Tin. 571, Chim. 944 + Tin 770, Tin 770


Recommendations

Engineering Plastics

Polyamides : 0.6% - (0.3%) Sanduvor VSU (+ 0.3% Nylostab S-EED) 0.3% Sanduvor + VSU

Polyesters : 0.3 - 0.6% Sanduvor VSU

* Generics : Tin 312

* Alternatives in PA : Chim. 944, I-1098, Cu Halides systems in PET : Tin. 213, Tin. 234,Tin. 327, Tin. 360,

Tin. 1577, Cy.5411


Recommendations

Rigid PVC

0.4% - 0.5% Sanduvor VSU(0.25% Sanduvor VSU + 0.25% Hostavin PR-31)

* Generics : Tin 312

* Alternatives : Tin. P, Tin. 320, Tin. 327, Tin. 571

Sanduvor VSU Training

Documents

Transcript of Sanduvor VSU Training