Product Information
Latent Urone Accelerator
Dyhard® UR500
Dyhard UR500 represents a difunctional, latent, micronized urone accelerator based on substituted urea. It is useful as latent accelerator preferably in combination with latent hardeners, e.g. the Dyhard 100 series, for hot curing of epoxy resin formulations.
ADHESIVES
Ingredients
Substituted Urea (Urone)
Commercial Products
Dyhard UR500
Application
COMPOSITES
POWDER COATINGS
PRINTED CIRCUIT BOARDS
ID No. P-U500/01e
Dyhard UR500 finds wide application as latent accelerator in hot curing of epoxy resin formulations. Its use is particularly suited in combination with micronized dicyandiamide, e.g. Dyhard 100S, or with dicyandiamide pastes Dyhard D50EP and DF50EP. Dyhard UR500 contains no halogen atoms or moieties and therefore may be preferred for applications where halogen-free formulations are required. The fact that Dyhard UR500 is not considered as dangerous chemical compound shall make this urone accelerator extremely advantageous in terms of product handling, processability and with respect to environmental issues. In formulations based on liquid bisphenol-A epoxy resins (EEW 182-192) Dyhard UR500 is typically added in amounts of 0,5-5,0 parts per 100 parts of epoxy resin. The optimal ratio strongly depends on the specific application and process requirements and has to be determined individually for each case. The good latency properties make Dyhard UR500 ideal for storage-stable one package formulations. Depending on fillers, modifiers and storage temperature shelf lives up to 6 months may be obtained. Compared to many other urone type accelerators, Dyhard UR500 shows superior acceleration performance in combination with finely micronized dicyandiamide hardeners even at temperatures as low as 100-120 °C.
Product Information
Latent Urone Accelerator Formulation Examples Dyhard UR500 Dyhard 100S Liquid bisphenol A epoxy resin (EEW 182 - 192) DSC – Onset [°C] DSC – Peak [°C] DSC – Tg [°C] Gel time at 120 °C Gel time at 140 °C Reaction time at 120 °C Reaction time at 140 °C Latency at 20 °C Latency at 40 °C
Dyhard® UR500 A
B
C
1,0 phr 6,5 phr
3,0 phr 6,5 phr
5,0 phr 6,5 phr
100 parts
100 parts
100 parts
143,6 151,9 156 12’15’’ 04’05’’ 9,4 min 2,2 min 65 d ca. 7 d
137,8 144,9 145 07’20’’ 02’55’’ 5,8 min 1,3 min 55 d ca. 7 d
134,6 142,1 134 05’40’’ 02’20’’ 4,5 min < 1 min 50 d ca. 7 d
(doubling of viscosity in [%])
Handling The acute oral toxicity levels are low (LD50 oral, rat > 2000 mg/kg). No hazard label is required. Nevertheless the usual precautions for handling chemicals must be observed. In particular the general threshold level for dust and a sufficient skin and eye protection must be observed. Please consult the Material Safety Datasheet for additional information.
Packaging Cardboard box with PE-inliner containing 10 kg net (400 kg per pallet).
Storage Unlimited storability in a dry place at ambient temperature without chemical decomposition. Long storage may result in caking. Storage time from date of delivery is recommended not to exceed 6 months. Please consult the Material Safety Datasheet for additional information.
Contact Joerg Brinkmann Dr. Martin Hitzler Dr. Christian Klinger Commercial Manager Applied Technology Applied Technology Phone: +49-8621 / 86-2935 +49-8621 / 86-3352 +49-8621 / 86-2511 Fax: +49-8621 / 86-502935 +49-8621 / 86-503352 +49-8621 / 86-502511 E-mail:
[email protected] [email protected] [email protected]
This information and all further technical advice is based on our present knowledge and experience. However, it implies no liability or other legal responsibility on our part, including with regard to existing third party intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments. The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be verified by testing, which should be carried out only by qualified experts in the sole responsibility of a customer. Reference to trade names used by other companies is neither a recommendation, nor does it imply that similar products could not be used. Status May 2007 * Edition May 2007/ BK-TB-SP * Provided that a new edition is published this data sheet loses its validity.
AlzChem GmbH • P.O. Box 1262 • D-83303 Trostberg
