Zbigniew CZECH-UV光固化在压敏胶和不干胶中的应用

C OH
CH2
O CO
O CO
O CO
CH2
CH
CH2
CH CH2
CH
CH CH2
CH2 CH CH2 CH CH2
UV initiated crosslinking reaction of acrylic PSAs based on 2-EHA and ABP
Tack
Shear strength
Wuxi HIT Limited Corporation & Research Institute of New Materials Harbin Institute of Technology
Institiute of Organic Chemical Technology International Laboratory of Adhesives and Self-adhesive Materials West Pomeranian University of Technology, Szczecin, Poland
West Pomeranian University of Technology, Szczecin, Poland
Why PSA based on acrylics?
The most important requirements for a pressure-sensitive adhesive, such as high tackiness (adhesion by the touch), high cohesion (inner stability), high stickiness (adhesion), UV, solvent and temperature stability are fulfilled by acrylics in an outstanding way
Properties [N]
Peel adhesion
curing window (balanced values)
UV dose [mJ/cm2]
Tack, peel adhesion and shear strength as a function of UV dose
Commercially available (BASF, HENKEL, POLY-CHEM) Photoinitiator incorporated during polymerization into the polymer structure Application:
Байду номын сангаас
O
O
Cl
O
O
2-propenoic acid 2-[4-chlor-(4-benzoylphenoxy)] ethyl ester
CH2 CH CH2 CH CH2 CH
CH2 CH CH2 C CH2
OC O
CO O
CO O
CH2
C2H5
C C4H9
C OH
HO C
C4H9 CH C2H5
HO C
• photoreactive polymers or polymers with C = C bonds or other photoreactive groups into side polymer chains
CH CH2
vinyl group
O CO CH CH2
acryloyloxy group
2019, Wuxi, China
Application of UV-radiation in technology of PSA and self-adhesive materials
Zbigniew Czech, Karolina Mozelewska
Institiute of Organic Chemical Technology International Laboratory of Adhesives and Self-adhesive Materials
Kind of Photoreactive Acrylic PSA
• Solvent-Based Acrylic PSA • Water-Borne PSA based on Acrylics (Dispersions) • Solvent-Free PSA based on Acrylics
- acrylic hotmelts (130-140°C)(UV-crosslinkable) - LVS (Low Viscosity Systems) coated at RM (23°C)
O
CO CH3
acetophenonoxy group
Mechanism of UV-initiated Crosslinking of Photoreactive Acrylic PSA
polymer
chain CO
O
R
O
UV
CO
R1 H C R2
CO O R O
HO C
R1 C R2
polymer
excellent aging resistance to elevated temperatures and plasticizers exceptional optical clarity non-yellowing highest balance of adhesion and cohesion excellent water resistance
chain
crosslinked polymer
Kind of Unsaturated Photoinitiators
O
O
CH2 CH C O
C
O O
OO
O Cl
O
O
O O
O N H
4-acryloyloxy benzophenone (H-abstractor) 4-benzophenylvinyl carbonate 4-acryloyloxy-4’-chlorbenzophenone 4-acryloyloxy aminbenzophenone p-vinyl benzophenone
(UV-crosslinkable and UV-polymerizable)
Kind of Photoreactive Acrylic PSA
Solvent-Based UV-Hotmelt
UV-Dispersions LVS
UV-Crosslinking Technology Used by Manufacturing of Photoreactive PSA