SINOCURE® PSS-DEN

Naphthalene photosensitizer, CAS 27294-37-7, UV-LED sensitizer, optical film curing

SINOCURE® PSS-DEN (CAS 27294-37-7) is 1,4-Diethoxynaphthalene, a photosensitizer manufactured for UV-LED cationic systems. It enables efficient curing at 365-405nm with minimal yellowing, can replace Anthracure UVS-2171.

SINOCURE® PSS-DEN
(Photo-sensitizer Anthracure in cationic polymerization)

Chemical Name: 1,4-Diethoxynaphthalene

CAS No: 27294-37-7

Molecular Formula: C14H16O2

Molecular Structure:

General Information :

SINOCURE® PSS-DBA is a high-performance photo-sensitizer designed to enhance the efficiency of UV curing processes. It enables effective sensitization of both radical photo-initiators and cationic photo-acid generators (PAGs) under 365–405 nm UV-LED light sources, even with low inherent absorbance in this range. It is particularly suited for applications requiring low yellowness and high transparency.

Specification :

Appearance	White to Light yellow powder
Purity	≥99%

Features :

Broad Compatibility: Works with radical and cationic UV systems.
Reduced Yellowness: Minimizes yellowing in cured films.
Oxygen Inhibition Resistance: Improves curing efficiency in both air and nitrogen atmospheres.
UV-LED Compatibility: Optimized for 365–405 nm UV-LED sources.
Enhanced Conversion: Increases monomer polymerization degree under various conditions.
Conjunctive use of PSS-DBA to give a boost to cure and to reduce yellowing

Application :

UV-curable coatings, adhesives, and inks
High-clarity optical films and electronic materials
Cationic epoxy systems
Low-yellowing formulations for transparent substrates

Recommended Dosage :

Radical Systems 0.1 – 1.0
Cationic Systems 0.8 – 3.0
Hybrid Systems 1.0 – 2.0

Storage :

Store in a dry, clean, ventilated warehouse.
Avoid exposure to light and heat.
Be careful to prevent leakage, rain and sun during transportation.

How Can We Help?

We offer a variety of options to help you find the right product for your application

WHY CHOOSE SINOCURE?

Customized development

Provide formulation optimization support for water-based/solvent-based systems
Global compliance

Full coverage of REACH, FDA, and GB standards
Stable supply

99.8% on-time delivery rate, 10,000-ton production capacity guarantee

Sinocure® PSS-DBA

9,10-Dibutoxyanthracene,cationic polymerization sensitizer, UV LED initiator

SINOCURE® DBA is often used as a photosensitizer in cationic polymerization,replace Anthracure UVS 1331;PSS 303;UVS 1550;UVS 1331;DBA sensitizer.

Chemical Name :

9,10-Dibutoxyanthracene
CAS No. :

76275-14-4
Molecular Formula :

C22H26O2
Assay :

99%min
Package :

25kgs /drum

Sinocure® CAT-551

Cationic photoinitiator, food packaging ink, low migration photoinitiator

SINOCURE® CAT-551 is a cationic photoinitiator with high photoinitiator activity,

Chemical Name :

10-(4-Biphenylyl)-2,4-Diethylthioxanthone-10- sulfonium hexafluorophosphate
CAS No. :

91773-90-9
Molecular Formula :

C29H25OS.PF6
Assay :

98%min
Package :

1KG/BAG,20kgs/carton

Sinocure® CAT-550

Cationic photoinitiator,LED curing, non-yellowing photoinitiator

SINOCURE® CAT-550 is a cationic photoinitiator with high photoinitiator activity,

Chemical Name :

10-(4-Biphenylyl)-2-isopropyl-9-oxo-9H-thioxanthenium hexafluorophosphate
CAS No. :

591773-92-1
Molecular Formula :

C28H23OS.PF6
Assay :

98%min
Package :

1KG/BAG,20kgs/carton

Sinocure® CAT-440

Cationic photoinitiator, CAS 60565-88-0, non-yellowing photoinitiator, UV curing catalyst

SINOCURE®CAT-440 is an iodonium salt cationic photoinitiator with the characteristics of high initiator activity,

Chemical Name :

Bis(4-methylphenyl)iodonium hexafluorophosphate
CAS No. :

60565-88-0
Molecular Formula :

C14H14F6IP
Assay :

99%min
Package :

20kgs/carton

Sinocure® CAT-263

4-Thiophenyl phenyl diphenyl sulfonium phenylborate, CAS 203573-06-2, triarylsulfonium salt, cationic photoinitiator

SINOCURE®CAT-263 is a triarylsulfonium salt photoinitiator.

Chemical Name :

4-Thiophenyl phenyl diphenyl sulfonium phenylborate
CAS No. :

203573-06-2
Molecular Formula :

C24H19S2.C24BF20
Assay :

99%min
Package :

1kg/bag,10kgs/carton

Sinocure® CAT-261

(6-Cumene)(5-cyclopentadienyl)iron(II) hexafluorophosphate, CAS 32760-80-8, iron arene complex, cationic photoinitiator

SINOCURE® CAT-261 is a cationic photoinitiator,used in cationic curing systems.

Chemical Name :

cyclopentadienyliron(II)hexafluorophosphate
CAS No. :

32760-80-8
Molecular Formula :

C14H17FePF6
Assay :

98%min
Package :

1KG/BAG,20kgs/carton

Sinocure® 938

Cationic photoinitiator, iodonium hexafluorophosphate, CAS 95715-86-9, LED curing photoinitiator

Sinocure ®938 is cationic photoinitiator of the iodonium hexafluorophosphate family,

Chemical Name :

Bis(4-t-butyl phenyl)lodonium hexafluorophosphate
CAS No. :

61358-25-6
Molecular Formula :

C20H26F6IP
Assay :

98%min
Package :

Carton /drum

Sinocure® 937

Bis(4-dodecylphenyl)iodonium hexaflurorantimonate, CAS 71786-70-4, cationic photoinitiator, UV curing

SINOCURE® 937 is a cationic photoinitiator with high photoinitiation activity,

Chemical Name :

Bis(4-dodecylphenyl)iodonium hexaflurorantimonate
CAS No. :

71786-70-4
Molecular Formula :

C36H58I.SbF6
Assay :

≥45%
Package :

25kg/Drum; 200kg/Drum

Sinocure® 6993

Mixed triarylsulfonium hexafluoroantimonate salts, CAS 71449-78-0, cationic photoinitiator, cycloaliphatic epoxy curing

Sinocure® 6993 is a cationic photoinitiator,

Chemical Name :

4-Thiophenyl phenyl diphenyl sulfonium hexafluoroantimonate
CAS No. :

71449-78-0
Molecular Formula :

C24H19S2.SbF6
Assay :

99% min
Package :

25kgs/drum;200kgs/drum

Sinocure® 6992S

Diphenyl[(phenylthio)phenyl]sulfonium hexafluorophosphate, CAS 75482-18-7, cationic photoinitiator, optical film curing

The triarylsulfonium salt photoinitiator has a sulfur atom that can be conjugated with three aromatic rings,

Chemical Name :

Diphenyl[(phenylthio)phenyl]sulfonium hexafluorophosphate
CAS No. :

75482-18-7 or 68156-13-8
Molecular Formula :

C24H19F6PS2
Assay :

98.5%min
Package :

bag or carton

Sinocure® 6992

Mixed triarylsulfonium hexafluorophosphate salts, cationic photoinitiator, UV flexo inks

Sinocure® 6992 is a mixed triphenyl sulfonium hexafluorophosphate soluble in propylene carbonate.

Chemical Name :

Mixed type triarylsulfonium hexafluorophosphate salts;Cationic Photoinitiator UVI-6992
CAS No. :

68156-13-8(75482-18-7) & 74227-35-3 & 108-32-7
Molecular Formula :

C24H19F6PS2,C36H28S3.2F6P, C4H6O3
Assay :

40%min
Package :

25kgs 、200kgs/drum

Sinocure® 6976

Mixed triarylsulfonium hexafluoroantimonate salts, cationic photoinitiator, UVI-6976 replacement

Sinocure® 6976 is a cationic photoinitiator,

Chemical Name :

Mixed type triarylsulfonium hexafluoro antimonate salts
CAS No. :

71449-78-0 & 89452-37-9 & 108-32-7
Molecular Formula :

C24H19F6S2Sb
Assay :

50% min
Package :

25kgs/drum;200kgs/drum

Sinocure® 250

Iodonium hexafluorophosphate, CAS 344562-80-7, UV photoinitiator, pigmented systems

Sinocure® 250 is a versatile photoinitiator for cationic polymerization of epoxy- or oxetane-based photocurable systems upon light exposure.

Cas No. :

344562-80-7 + 108-32-7
Chemical Name :

Photoinitiator 250
Content :

75%
Package :

20kg/drum