![Page 1: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/1.jpg)
Leading the way
Photoinitiators for Low Migration Applications
![Page 2: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/2.jpg)
Leading the wayWhat is Migration?
Substrate
Ink
Substrate
Ink
Substrate
Ink
Penetration Migration Contact/ Set off migration
Substrate
Ink
Evaporation Migration
Substrate
Ink
Condensation Migration
![Page 3: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/3.jpg)
Leading the wayUV Energy Curing Formulation
Resins and Oligomers
Monomers and Diluents
Photoinitiators
Additives
100% solids formulation
Low migration potential: High acrylate functionality and molecular weight.
High migration potential:Low acrylate functionality and molecular weight.
Small molecules will readily migrate. Low migration photoinitiators can be used.
Many additives will readily migrate.Specialist low migration options may be available.
![Page 4: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/4.jpg)
Leading the wayMigration from Photoinitiators
O
R R
CH3N(R)
2
OH
CH2N(R)
2
. .
Aryl aryl ketone Amine synergist Ketyl radicalinert
Alkylamino radicalreactive
O
OH
R
O
OH. .
Aryl alkyl ketone Benzoyl radical Alkyl radical
Type I photoinitiators
Type II photoinitiators
Fragments cause potential migration issues in some applications.
Unreacted species cause potential migration issues in some applications.
![Page 5: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/5.jpg)
Leading the wayRegulation Around Migration
Originally regulation imposed by industries on food packaging applications. • EuPIA regulation (November 2016). • Nestle List (Version 4.0.1. 2016) • Swiss Ordinance (Annex 10, RS817.023.12)• EU No 10/2011
Regulation on migration in non-food applications. IKEA (IOS-MAT-0066)
Standard photoinitiators can be used as long as migration levels are below the threshold values and excluded products are not used. Polymeric photoinitiators provide an
alternative with lower migration risk.
![Page 6: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/6.jpg)
Leading the wayMolecular Weight and Migration
0
10
20
30
40
50
60
70
80
90
250 500 750 1000
Mig
ration
Molecular Weight / g mol-1
Low
High
Low Molecular WeightPhotoinitiators SpeedCure 73, 84, BP, ITXhave MWs of 250 g mol-1 or less and are known to readily migrate.
High Molecular WeightPhotoinitiators with MW around 500 g mol-1
give low migration.Those with MW of 1000 g mol-1 give near-zero migration.
Green, W. Arthur. Industrial Photoinitiators: A Technical Guide. CRC Press, 2010.
![Page 7: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/7.jpg)
Leading the wayPolymeric Photoinitiators
PI
PI
PI
PI
PI
PI
Features:High molecular weight Low volatilityLow odourHigh viscosity Affects rheology.Reactivity Depends on mole fraction PI.
High molecular weight structures have been designed to reduce migration
![Page 8: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/8.jpg)
Leading the wayPolymeric Photoinitiator Products
7005
• Liquid polymeric benzophenone.• Molecular weight (Mn) ~ 1200 g mol-1. • Very low migration and low odour.• Used in combination with a polymeric amine
synergist. 0
0.5
1
1.5
2
2.5
3
3.5
210 260 310 360 410
Ab
sorb
ance
Wavelength (nm)
![Page 9: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/9.jpg)
Leading the way
• Highly active multifunctional polymeric thioxanthone• Mercury and LED active• Molecular weight (Mn) ~ 1800 g mol-1. • Very low migration and low yellowing• Used with a polymeric amine synergist
0
0.5
1
1.5
2
2.5
3
210 260 310 360 410
Ab
sorb
ance
Wavelength (nm)
7010
Polymeric Photoinitiator Products
![Page 10: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/10.jpg)
Leading the wayPolymeric photoinitiator Products
• Liquid polymeric amine.• Molecular weight (Mn) ~1050 g mol-1.• Highly efficient polymeric amine synergist.• Very low migration and low odour.
0
0.5
1
1.5
2
2.5
3
210 260 310 360 410
Ab
sorb
ance
Wavelength (nm)
7040
![Page 11: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/11.jpg)
Leading the wayPolymeric Photoinitiator Products
• Liquid polymeric thioxanthone in EO-TMPTA.• Designed for low migration inks and coatings (mercury & LED active)• Used in combination with polymeric amine synergist
• Low migration ready to use formulated PI (mercury & LED active)• Designed for food packaging related applications of UV
Flexographic, Offset and Screen Printing inks where low migration as a main characteristic is mandatory.
LM
7010-L
01
![Page 12: Leading the way - Lambson Ltd · 2019. 5. 1. · Photoinitiators SpeedCure 73, 84, BP, ITX have MWs of 250 g mol-1 or less and are known to readily migrate. High Molecular Weight](https://reader035.vdocuments.site/reader035/viewer/2022071415/61112cec4434b36159474845/html5/thumbnails/12.jpg)
Leading the way
With offices and facilities in England, Europe, India, China, Japan and America we offer a truly Global Supply Network.
Thank you for your attention Questions?