Spectra Group - H-Nu 640 - 941694-83-3

Knowde Enhanced TDS

Identification & Functionality

Chemical Name: 3H-Indolium, 1-butyl-2-[5-(1-butyl-1,3-dihydro3,3-dimethyl-2H-Indo-2-ylidene)-1,3-pentadienyl]- 3,3-dimethyl-, (T-4)-butyltriphenylborate
CASE Ingredients Functions: Photoinitiator
CAS No.: 941694-83-3
Technologies: CASE Ingredients
Product Families: CASE Ingredients — Additives
Catalysts & Initiators

Features & Benefits

CASE Ingredients Features: Fast Cure,
Faster Cure Time,
Non-Yellowing Grade,
Yellowing Resistance,
Yellowing Stability
Advantages: Good solubility in a variety of monomers

Capable of curing a wide range of acrylates via free-radical mechanism

Cure with red source (red handheld lasers and laser diodes)

Cure through colored substrates (e.g. a red taillight assembly)

Initiator bleaching (blue to pale/no color) upon light interaction can act as cure indicator (Borate V enhances cure and bleaching)

Applications & Uses

Markets: Adhesives & Sealants,
Paints & Coatings
Applications: Adhesives & Sealants — Other Adhesives & Sealants Applications
Paints & Coatings — Other Paints & Coatings Applications
Cure Method: Radiation Cure
Adhesive & Sealant Type: Radiation Curable Adhesive
Coating Type: Radiation Curable Coating
Ink & Toner Type: Radiation Curable Ink
Applications Recommendations: The recommended starting level of H-Nu 640 ranges from 0.05 to 1 wt.% in relation to the total amount of resin in a formulation.

Borate V co-initiator at a 1:1 weight ratio is not required but will increase the cure speed and overall bleaching of the initiator in many formulations, so it is highly recommended.

The H-Nu 640 is quite soluble in most acrylate resins, but it is recommended to predissolve photoinitiator and the Borate V (poor solubility in acrylates) in DMAA (N,N-Dimethylacrylamide, 2-3%) for ease of incorporation into your formulation.

Properties

	Value	Units	Test Method / Conditions
Absorbance	max. 649	nm	UV Visible spectroscopy

Technical Details & Test Data