Bayhydrol UV-radiation cured polyurethane dispersions

Covestro Bayhydrol UV 2282 Waterborne UV-curable polyurethane dispersion Good wood grain wetting

type	Waterborne UV Curable Polyurethane Dispersion
form of supply	About 39% dispersion in water
use	For the preparation of self-drying waterborne UV-curable coatings for wood/plastics

Product Specifications

characteristic	Numerical value	Units of measurement	method
Non-volatile content (1g/1h/125℃)	39±1	%	DIN EN ISO 3251
Outflow time@23℃(4mm cup)	≤50	s	AFAM.2008/105 03
pH	7.75±0.75		DIN ISO 976

Other data*

characteristic	Numerical value	Units of measurement	method
Minimum film forming temperature	0	℃	DIN ISO 2115 （MFT）
Density@20℃	about 1.06	g/ml	DIN EN ISO 2811-2
Exterior	Milky white slightly colloidal

compatibility
溶解性/稀释性
Bayhydrol® UV 2282 can be diluted with water.

Bayhydrol® UV 2282 generally has good compatibility with many acrylic dispersions, UV cured products and polyurethane dispersions such as Bayhydrol® XP 2593/1. Such mixtures should be adjusted to pH above 6.7 with triethylamine. Bayhydrol® UV 2282 can be matted with standard matting agents. The matting agent and auxiliary agent can be directly dispersed in the base material in the dispersing machine.

application
Bayhydrol® UV 2282 is used for the preparation of high-quality waterborne UV-curing coatings, mainly for wood coatings, which enable the films to meet the resistance requirements of DIN 68 861-1B. After the water has evaporated, the film is self-drying and can be sanded. The coating film after UV curing (10m/min/80W/cm lamp) has superior performance. The requirement for photoinitiator is low, 1-2% is sufficient. (by weight, based on solid base). Coatings based on Bayhydrol® UV 2282 have good adhesion on a variety of substrates, including plastic ones. To further improve film adhesion and eliminate "shadow curing", dual-cure coating systems can be prepared with Bayhydrol® UV 2282 and curing agent Bayhydur® VP LS 2336.

store
Stored under suitable conditions between 10-30°C, the product has a storage stability of at least 6 months. This product is sensitive to freezing.

Safety: Hazard Identification
Harmful to aquatic life and may cause long-term adverse effects in the aquatic environment.