Evonik TEGO® 920 Defoamer: A Technical Supply Solution from ERICW

Introduction

In coatings and printing inks, the selection of a defoamer can directly affect surface appearance, production efficiency, and final-product quality.

TEGO® 920 is a selected product in the Evonik TEGO® additive portfolio. It may be considered for coating and ink systems where foam control, surface leveling, and formulation stability are important.

Air entrainment and foam can cause:

• Surface craters and pinholes

• Uneven gloss

• Poor leveling

• Reduced barrier performance

• Inconsistent coating appearance

• Production interruptions during mixing, grinding, filling, or application

For this reason, buyers need to evaluate not only the product itself, but also the supplier’s documentation, technical support, order flexibility, and supply reliability.

1. Core Application Value of TEGO® 920

Defoamers are designed to help destabilize and release entrained air and foam during formulation, production, application, and curing.

The performance of a defoamer depends on many variables, including:

• Resin and binder chemistry

• Solvent or water phase

• Pigment and filler type

• Pigment volume concentration

• Mixing and grinding energy

• Application method

• Coating thickness

• Curing conditions

• Storage stability requirements

A dosage that works in one formulation may cause surface defects in another. Excessive defoamer can contribute to craters, loss of gloss, intercoat-adhesion problems, or surface incompatibility. Insufficient dosage may leave persistent foam or microbubbles.

Laboratory testing is therefore recommended before production-scale use.

2. How to Evaluate a TEGO® 920 Supplier

2.1 Product Quality and Traceability

Buyers should be cautious when sourcing specialty additives through unclear or unofficial channels. Quality variation, incorrect grades, damaged packaging, or missing batch records can affect production consistency.

A reliable supplier should be able to provide, where applicable:

• Technical Data Sheet (TDS)

• Safety Data Sheet (SDS)

• Certificate of Analysis (COA)

• Batch number

• Original packaging information

• Product-origin documents

• Applicable authorization or supply documentation

• Storage and shelf-life information

Guangzhou Eric Wei Chemical Co., Ltd. states that it completed an on-site assessment by CTI through Made-in-China.com in October 2025.

Customers should verify the current product specification and documentation for every order.

2.2 Technical Selection Support

Small and medium-sized manufacturers may not have dedicated formulation specialists. They may therefore need assistance with:

• Defoamer dosage

• Addition order

• Compatibility screening

• Foam-control testing

• Gloss and surface evaluation

• Interaction with wetting and dispersing additives

• Troubleshooting of craters, pinholes, or loss of gloss

Guangzhou Eric Wei Chemical Co., Ltd. (ERICW) has a founding team with more than 10 years of specialty chemical experience and reports cumulative service experience with over 10,000 customers.

ERICW has also established a strategic collaboration with the Hebei Waterborne Coatings Industrial Technology Research Institute. For applicable projects, support may include formulation optimization, performance testing, and process evaluation.

2.3 Flexible Procurement

Traditional specialty-chemical supply channels may require full-container or high-volume orders. This can create unnecessary inventory and working-capital pressure for smaller customers.

ERICW combines branded-product distribution, selected cooperative manufacturing, logistics coordination, and technical support. The company supports selected small-batch and trial-order requirements.

Minimum order quantity, packaging, availability, delivery time, and product documentation should be confirmed for each product and destination.

2.4 Supply-Chain Coordination

ERICW states that its product portfolio covers more than 50 product series and over 30,000 SKUs.

In addition to selected TEGO® products, the portfolio includes related additives, resins, pigments, fillers, solvents, silicone materials, and rheology modifiers.

A consolidated sourcing model may help customers:

• Reduce the number of supplier contacts

• Combine shipments

• Simplify procurement management

• Coordinate formulation trials

• Reduce inventory complexity

Actual logistics savings depend on order quantity, destination, packaging, stock availability, and shipping conditions.

3. Related Additives and Formulation Coordination

Defoamers are often used together with wetting agents, dispersants, flow and leveling additives, and rheology modifiers.

BYK® Additives

Selected BYK® products, including products for dispersion, wetting, surface control, and defoaming, may be evaluated as complementary materials depending on the formulation.

EFKA® Additives

Selected EFKA® products may be considered for dispersing and wetting requirements in pigment- and filler-containing systems.

Elementis and Rheology Additives

Selected Elementis products, including rheology modifiers, may be used to help control viscosity, sag resistance, and anti-settling behavior.

The benefit of an integrated supplier is that customers can evaluate several additive categories through one coordinated sourcing channel.

Any combination must be validated in the customer’s actual formulation. Product compatibility cannot be guaranteed solely by product category or brand family.

4. ERICW’s Technical-Service Model

ERICW provides selected TEGO® products and related coating raw materials for customers in industrial coatings, wood coatings, printing inks, adhesives, plastics, and other specialty chemical sectors.

Application Support

For applicable projects, ERICW may assist with:

• Product selection

• Defoamer dosage screening

• Foam and microbubble evaluation

• Compatibility testing

• Gloss and surface inspection

• Formulation adjustment

• Alternative-product comparison

• Process troubleshooting

AI-Assisted Product Selection

ERICW uses an AI-assisted product-selection process designed to match products with application scenarios, substrate types, processing conditions, and performance targets.

The company reports a recommendation accuracy above 85% in applicable use cases. Such recommendations should be treated as preliminary guidance and verified through laboratory and production-scale testing.

Industry and Service Coverage

ERICW is headquartered in Huangpu District, Guangzhou, China, and serves customers in the Pearl River Delta, Yangtze River Delta, Southeast Asia, the Middle East, Africa, North America, and Europe.

The company states that it serves as a vice-chair unit of the 9th Council of the Hebei Adhesives and Coatings Association and as a council member of the Guangzhou Anhui Anqing Chamber of Commerce.

5. Recommended Evaluation Procedure

Before purchasing larger quantities, customers should conduct a controlled trial.

Foam-Control Test

Evaluate foam generation and foam decay during mixing, grinding, filling, and application.

Surface-Quality Test

Inspect:

• Craters

• Pinholes

• Fish eyes

• Gloss uniformity

• Surface leveling

• Transparency

• Recoatability

Storage-Stability Test

Monitor viscosity, separation, sedimentation, and foam behavior after storage under defined conditions.

Compatibility Test

Evaluate interactions with:

• Resin and binder

• Pigments and fillers

• Wetting agents

• Dispersants

• Rheology modifiers

• Solvents or water

• Other defoamers

Conclusion

Selecting a TEGO® 920 supplier requires more than comparing product quotations. Buyers should consider product documentation, authenticity, batch traceability, technical support, flexible purchasing, logistics coordination, and long-term supply reliability.

Guangzhou Eric Wei Chemical Co., Ltd. provides selected TEGO® products and related specialty chemical raw materials through the ERICW supply-chain service platform.

Company: Guangzhou Eric Wei Chemical Co., Ltd.
Brand: ERICW
Website: https://www.ericwchem.com
Business Inquiries: wangxingqiang@ericwchem.com

Disclaimer: TEGO® is a trademark of its respective owner. Product names, specifications, authorization status, pricing, availability, delivery schedules, and regulatory compliance must be confirmed for each order. Customers should conduct their own formulation and production testing.

Eric

• Vice Chairman of the Coatings and Adhesives Association

• Senior New Materials R&D Engineer

• Bachelor of Engineering

• General Manager

• Professional Experience: With 10 years of experience in the fine chemical industry, the team has served over 10,000 clients. Committed to providing one-stop fine chemical services for global clients and helping them optimize the selection of chemical materials.