Defoamer Testing for Epoxy Systems

2025-12-22

EZHOU ANJEKA TECHNOLOGY CO.,Ltd Professional Additive supplier
Test Record Sheet
Test Name	Defoamer Testing for Epoxy Systems					Temperature/humidity
Customer		Conducted by	Mr. Wang	Date	July 27,2025
Objective
Formulation
Formulation
Resin	150	Sanmu 828
Reactive diluent	21	AGE
Defoamer	1.05

Procedure
1.After weighing, disperse the mixture using a high‑speed disperser: first at 1000 rpm for 1 minute, then increase to 3000 rpm for 9 minutes. 2.Pour the selected material (containing foam) into a 100‑ml graduated cylinder up to the 100‑ml mark, then weigh it. 3.Allow the sample to stand. Record the following at 2 hours and 24 hours: The meniscus reading (ml) in the graduated cylinder. The height of the clear supernatant (mm or %). The clarity of the liquid phase (e.g., clear, hazy, turbid). 4.Calculation Initial Density = Mass of Material / Initial Volume of Material Foam Fraction (%) = [(Initial Meniscus Reading – Meniscus Reading after Standing) / Initial Meniscus Reading] × 100% Defoaming Efficiency (%) = [(Initial Meniscus Reading – Meniscus Reading after Standing) / (Initial Meniscus Reading – Meniscus Reading after Complete Defoaming)] × 100%
Result

Defoamer	Material Weight (Tare Deducted)	Initial Meniscus Reading	2H		24H		Clarity of Supernatant
Defoamer	Material Weight (Tare Deducted)	Initial Meniscus Reading	Material Meniscus (ml)	Supernatant Meniscus (ml)	Material Meniscus (ml)	Supernatant Meniscus (ml)	Clarity of Supernatant
AJK 5680A	110.24	100	99	2	98.5	98.5	Severely turbid, completely opaque.
AJK 5053	109.49	100	99	1	98	98	Severely turbid, completely opaque.
AJK 5088	108.24	100	98.5	1.2	97.5	97.5	Slightly hazy, semi‑transparent.
AJK 5066N	110.03	100	99	2	98.5	98.5	Slightly hazy, semi‑transparent.
AJK 5530	104.64	100	96	0.5	94	94	Slightly hazy, semi‑transparent.
Sample 530	105.64	100	97	1	95	95	Slightly hazy, semi‑transparent.

	AJK 5680A	AJK 5088	AJK 5530	Sample 530	AJK 5053	AJK 5066N
initial density	1.1024	1.0824	1.0464	1.0564	1.0949	1.1003
2H Foam Fraction%	1	1.5	4	3	1	1
24H Foam Fraction%	1.5	2.5	6	5	2	1.5
Defoaming Efficiency%	66.7	60	66.7	60	50	66.7


Conclusion
In this epoxy system： Anjeka 5680A delivers the best defoaming and foam inhibition performance, but exhibits relatively poor compatibility. Anjeka 5066N offers good defoaming, foam inhibition, and excellent compatibility.