Dendritic Acrylate Oligomers
Dendritic acrylate oligomers mimic the performance of dendrimers, star- or ball-shaped polymers that are built up layer by layer, without all of the cost. Dendritics are more spherical than rod-shaped, and because of their spherical shape, they have significantly lower viscosity than typical linear oligmers of comparable molecular weights.
Dendritics in UV-Curable Coatings
Dendritic oligomers are hyper-branched polymer networks that can be polymerized to themselves and to other monomers or oligomers. They have a high functionality, ≥18. Typically, dendritic oligomers would be used at 35 to 70% by weight in formulations. They may also have some use as additives at lower levels.
Dendritic Oligomers
| Oligomer | Applications | Features & Benefits | Viscosity cP | Tg |
|---|---|---|---|---|
| BDT-1006 | Hard, Protective Coatings Overprint Varnishes Printing Inks |
Very good chemical and thermal resistance (390°C); low shrinkage; rapid cure; low oxygen inhibition; abrasion and scratch resistance | 1,500 at 25°C | >100°C |
| BDT-1015 | Hard, Protective Coatings Overprint Varnishes Wood Coatings Printing Inks |
Low shrinkage and warpage; superior thermal resistance; excellent stain, scratch, and chemical resistance; tin free; rapid cure rate; low oxygen inhibition | 31,275 at 25°C | 47°C |
| BDT-4330 | Hard, Protective Coatings Overprint Varnishes Printing Inks |
Excellent chemical and thermal resistance (419°C); low shrinkage; rapid cure; low oxygen inhibition; abrasion and scratch resistance | 4,000 at 50°C | >100°C |
| XDT-1018 | Hard, Protective Coatings Overprint Varnishes Printing Inks |
Low diluted viscosity; very good temperature (350°C) and chemical resistance; exceptional mechanical and physical properties | 50,000 at 25°C | 46°C |
