Product Recommendation | EO-TMPTA: Performance Varies with "Chain," Revealing the Secret of Different EO Degrees!
Release time:
2025-07-01
In UV/EB curing formulations, trifunctional acrylate monomers are indispensable key raw materials. Among them, Ethylene Oxide Modified Trimethylolpropane Triacrylate (EO-TMPTA, CAS#28961-43-5), with its excellent flexibility, low shrinkage, and adjustable performance, plays an important role in various fields such as inks, coatings, and adhesives.
But did you know? EO-TMPTA actually has multiple "versions"! From 3EO to 20EO, although the structure is similar, the properties vary. In this issue, we will take you to see the differences between these "chain length" EO-TMPTAs and their advantages and disadvantages in different applications.
What is EO-TMPTA?
EO-TMPTA is a modified product based on TMPTA (Trimethylolpropane Triacrylate) with grafted ethylene oxide (EO) segments. By controlling the number of EO (i.e., the average number of ethylene oxide units), the following properties of the monomer can be significantly adjusted:
Viscosity
Reactivity
Flexibility
Shrinkage
Compatibility
This "chain length adjustable" design provides great flexibility for formulators, making it an ideal matching solution for applications from high-hardness coatings to flexible applications.
Performance Comparison of Different EO Degrees
EO Degree | Product | Viscosity (cps/25℃) | Tg | Reactivity | Flexibility | Shrinkage |
EO3 | Easmer 3EO-TMPTA | 40-80 | High | Extremely High | Low | High |
EO4 | Easmer 4EO-TMPTA | 50-90 | Medium High | Very High | Medium | Medium High |
EO6 | Easmer 6EO-TMPTA | 70-110 | Medium | Medium High | Medium+ | Medium |
EO9 | Easmer 9EO-TMPTA | 80-140 | Medium Low | Medium | Good | Medium Low |
EO15 | Under Development | 120-160 | Low | Medium | Excellent | Low |
EO20 | Under Development | 160-240 | Extremely Low | Lower | Excellent | Extremely Low |
Key Features and Recommended Applications
EO Degree | Product | Core Features | Recommended Applications |
EO3 | Easmer 3EO-TMPTA | Low skin irritation, fast curing, high hardness, good chemical resistance | Screen printing inks, plastic coatings, high hardness systems |
EO4 | Easmer 4EO-TMPTA | Low TMPTA residue, good reactivity, balanced flexibility and hardness | Adhesives, UV inkjet, radiation curable coatings |
EO6 | Easmer 6EO-TMPTA | Low irritation, fast curing, good flexibility | Metal coatings, paper varnishes, general-purpose UV paints |
EO9 | Easmer 9EO-TMPTA | Low irritation, fast curing, excellent flexibility | Flexible coatings, PSA pressure-sensitive adhesives |
EO15 | Under Development | Hydrophilic, low irritation, good flexibility, low shrinkage | Food packaging, low migration inks, soft packaging UV inks |
EO20 | Under Development | Ultimate flexibility, extremely low shrinkage, water-soluble, extremely low irritation | Medical coatings, LED curing systems, biodegradable coatings |
✅ Higher EO degree → more flexible, lower shrinkage, lower irritation; ❗ Lower EO degree → higher reactivity, higher hardness, suitable for high strength requirements.
Application Recommendations
EO3–EO6: Suitable for hard coatings, fast-curing systems, widely used in wood, plastics, screen printing inks, etc.
EO9–EO20: More suitable for flexible coatings, electronic adhesives, soft packaging labels, LED curing, low migration systems.
If you are looking for a UV monomer that balances hardness, flexibility, and low shrinkage, then different EO grades of EO-TMPTA will certainly help your formulation!
Get Samples or More Technical Information?
Welcome to contact our sales team for TDS, application recommendations, and samples of different EO-TMPTA grades!
sales@eastomat.com
EO-TMPTA,cas#28961-43-5
Latest News
2025-07-02
Get a Free Consultancy
NANTONG EASTO MATERIALS TECHNOLOGY CO.,LTD.
No.118,Zhujiang Rd.,Juegang St.,Rudong County,
Nantong City,Jiangsu Province,226400,China
Share：
