Anhui Eapearl Chemical | Dimethyl Silicone Oil (PDMS) Overseas Market Product Introduction

I. Introduction

Anhui Eapearl Chemical Co., Ltd., established in 2009 and headquartered in Tongling, Anhui, China, is an integrated enterprise encompassing R&D, production, and international trade. The company holds hazardous chemicals operating qualifications and self-operated import/export rights, with multiple production bases.

The company supplies a full range of Polydimethylsiloxane (PDMS, commonly known as dimethyl silicone oil), covering four major grades: Industrial Grade, Cosmetic Grade, Food Grade, and Pharmaceutical Grade. Products comply with EU REACH, US FDA, European Food Additive Standard EFSA E900, Malaysia SIRIM, Laos DST, Singapore BC Green Label, and other regionally recognized standards across Southeast Asia. Core partner customers include epoxy floor coating manufacturers, industrial anti-corrosion paint producers, rubber and plastic molding factories, as well as daily chemical and food processing manufacturers. The company supports customized viscosity specifications and provides one-stop formulation technical support for various epoxy paint systems.

II. Product International Standard Basic Profile

1. Global Basic Identification

Item	Details
Product Name	Polydimethylsiloxane (PDMS)
Cosmetic INCI Name	Dimethicone
CAS Number	9006-659
EINECS Number	618-493-1
EU Food Additive Code	E900
JECFA Standard Number	1002
Molecular Structure Formula	CH₃—[Si(CH₃)₂—O]ₙ—Si(CH₃)₃
Appearance	Colorless, transparent, odorless liquid; no precipitate, no stratification
Standard Testing Temperature	25°C (global unified reference temperature)

2. International Viscosity Unit Unified Conversion Standard

International testing standards ASTM D445 and ISO 3104 uniformly specify: 1 centistoke (cSt) = 1 square millimeter per second (mm²/s). Full series kinematic viscosity range: 0.65 – 1,000,000 cSt (0.65 – 1,000,000 mm²/s, at 25°C).

3. Four-Grade International Compliance Comparison Table

Grade	Domestic Implementation Standard	International Certification Systems	Southeast Asia Industry Applicable Regulatory Requirements
Industrial Grade	Purity ≥99.5%	ASTM D445, ASTM D92, EU REACH Registration	Malaysia SIRIM: no additional restrictions for paint raw materials; Vietnam: general raw material for epoxy factories
Cosmetic Grade	Low volatility, low cyclosiloxane content	US FDA 21CFR, EU Cosmetics Regulation EC 1223/2009	Singapore BC: compliant cosmetic raw material product
Food Grade	GB 14939	FDA 21 CFR 173.340, EFSA E900, JECFA ADI: 0–1.5 mg/kg body weight	Thailand, Vietnam, Malaysia: dedicated for epoxy anti-corrosion coatings on food processing equipment; passes food plant audits
Pharmaceutical Grade	Chinese Pharmacopoeia CP, USP	USP-NF Dimethicone Standard, European Pharmacopoeia EP Dimethicone Standard	Medical equipment anti-corrosion epoxy auxiliary additives

4. Core Performance International Testing Parameters (ASTM/ISO Test Methods Indicated)

High & Low Temperature Resistance

- Long-term service range: -50°C to +200°C; short-term instantaneous tolerance: 220°C

- Siloxane bond energy: 452 kJ/mol (Test Standard: ASTM D2225)

- Suitable for epoxy coating high-temperature baking curing conditions; stable performance without decomposition

Ultra-Low Surface Tension

- Surface tension: 20–21 mN/m (Test Standard: ASTM D1331), significantly lower than water (72 mN/m)

- Effective defoaming addition rate: only 10–100 ppm; foam testing complies with ISO 14404

Chemical and Physiological Inertness

- Resistant to weak acids, weak bases, and oxidants; insoluble in water and animal/vegetable oils (ISO 175 immersion test)

- Rat oral LD₅₀ > 50 g/kg; OECD toxicology testing indicates low toxicity, non-irritating

Flash Point Safety Indicators (Cleveland Open Cup Method ASTM D92)

- Viscosity < 50 cSt: Flash point ≥ 165°C

- Viscosity ≥ 50 cSt: Flash point ≥ 300°C

- UN maritime classification: not classified as dangerous liquid

III. International Viscosity Selection Comparison Table

Viscosity Specification (cSt / mm²/s @ 25°C)	Appearance	General Grade	Overseas Epoxy Paint Matching Application Scenarios
0.65–10	Water-thin, extremely high spreadability	Industrial Grade	Waterborne epoxy primer defoaming stock solution, low-viscosity epoxy dilution aid
20–100	Light oily, fast leveling	General Industrial Grade	Solvent-based epoxy anti-corrosion primer, epoxy floor base additive
350–1000	Medium viscosity, continuous uniform film formation	Industrial Grade	Solvent-free epoxy self-leveling finish, heavy-duty epoxy flooring
5000–1,000,000	Thick paste, weak fluidity	High-End Industrial Grade	Epoxy electrical potting, high-temperature resistant protective epoxy coatings

IV. Full-Industry Overseas Application Segments

4.1 Electronics & Electrical | Epoxy Potting Support

Used as damping and defoaming additive for epoxy potting resins, complying with ASTM D2225 insulating fluid standards. Suitable for transformer and capacitor epoxy encapsulation production plants in Malaysia and Singapore.

4.2 Rubber, Plastics & Metals | Epoxy Release Agent

Dimethyl silicone oil diluted to 0.5%–5% can be sprayed as a release agent for epoxy molds and crafts. Does not interfere with epoxy resin crosslinking curing. Widely used in Vietnam's plastic and epoxy craft processing factories.

4.3 Food & Pharmaceutical Equipment Coating Additives

Food-grade E900-certified dimethyl silicone oil paired with food equipment-dedicated epoxy anti-corrosion coatings. Suitable for beverage and bakery production lines in Thailand and Indonesia; passes European EFSA food contact standard audits.

4.4 Textile Epoxy Coating Defoamer

Defoaming and smoothing additives for epoxy color-fixing coatings. Suitable for textile industrial clusters in Vietnam and Cambodia.

4.5 Special Section: Dimethyl Silicone Oil for Epoxy Coatings (Full-System International Standard Support)

Export-compatible epoxy systems: waterborne epoxy primers, solvent-based epoxy primers, solvent-free epoxy flooring, epoxy self-leveling, heavy-duty anti-corrosion epoxy paints.

Our dimethyl silicone oil meets ISO 11890-1 (VOC testing for paints), ASTM D6886 (coating additive testing), and GB/T 22374 (floor coatings).

4.5.1 Core Functions in Epoxy Flooring and Anti-Corrosion Paints (International Measured Data)

1. Efficient Defoaming and Pinhole Elimination

During mixing, rolling, and troweling of epoxy A and B components, air entrapment easily creates craters and pinholes. Adding only 10–100 ppm of silicone oil completely eliminates bubbles; foam testing passes ISO 14404, significantly improving the finished product qualification rate of Southeast Asian flooring projects.

2. Improved Leveling, Elimination of Orange Peel and Brush Marks

According to ASTM D1331, reduces system surface tension, enabling uniform paint film leveling. Solves the orange peel defect in high-viscosity solvent-free epoxy used in heavy-duty plants in Malaysia and Singapore.

3. Wetting of Concrete Substrate, Reduction of Efflorescence and Mottling

Enhances epoxy resin penetration into cement capillary pores, complying with EN 1504 concrete protective coating standards. Suitable for damp substrates in high-temperature, high-humidity underground garages in Vietnam and Thailand.

4. Enhanced Scratch Resistance and Hydrophobic/Stain Resistance

Forms an ultra-thin silicone protective layer after epoxy curing; abrasion resistance improves by 15% (ASTM D4060 abrasion test). Factory oil stains and water accumulation can be easily wiped away.

4.5.2 Viscosity Selection for Different Epoxy Systems

Waterborne Epoxy Primer (Underground Garage Building Certification Projects)

- Recommended Specification: 10–50 cSt industrial silicone oil

- Compliance Matching: System VOC ≤ 120 g/L, aligned with Malaysia SIRIM waterborne floor limit ≤ 100 g/L and Singapore Green Mark low-VOC standard ≤ 50 g/L, suitable for high-end environmental projects.

- Addition Ratio: 0.05%–0.1% of total epoxy resin mass; no whitening or stratification in tropical high-temperature, high-humidity environments.

Solvent-Based Epoxy Penetrating Primer (Aged Cement Renovation, Low-Cost Industrial Plants)

- Recommended Specification: 100 cSt

- System Compatibility: Compatible with xylene and ester solvents; finished product VOC ≤ 250 g/L, within Laos DST metal coating limit of 400 g/L.

Solvent-Free Heavy-Duty Epoxy Primer/Self-Leveling (Food & Pharmaceutical GMP Workshops)

- Recommended Specification: 350–500 cSt

- Standard Compliance: Solvent-free epoxy VOC ≤ 60 g/L, compliant with GB/T 22374 and EU 2004/42 floor coating CE standards. Can be used with C12-14 AGE reactive diluents without reducing film hardness.

Heavy-Duty Anti-Corrosion Epoxy Paint (Industrial Plant Areas)

- Recommended Specification: 50–100 cSt high-temperature resistant grade

- Thermal Stability: Does not decompose during 120°C baking; passes ASTM D2485 high-temperature coating test; resists industrial acid/alkali corrosion environments.

4.5.3 International Standard Addition Ratios and Operating Procedures

1. Standard Addition Ratio (based on total epoxy resin mass, ISO coating industry general specification)

- Defoaming only: 0.05%–0.1%

- Defoaming + leveling/smoothing: 0.1%–0.2%

- Total addition must not exceed 0.3% to prevent interlayer delamination (verified by ASTM D3359 cross-cut adhesion test)

2. Standard Addition Process

Pre-dilute dimethyl silicone oil with epoxy thinner/deionized water at a ratio of 1:5. Mix at low speed uniformly to avoid localized high silicone concentration causing fish-eye craters.

3. Tropical Climate Exclusive Pitfall Prevention Points

① Excessive addition causes interlayer delamination in multi-layer epoxy flooring. Large-area commercial flooring projects in Singapore must use the minimum effective addition rate.

② In Thailand and Vietnam, with year-round high temperature and humidity, low-cyclosiloxane grades must be selected to meet Singapore BC indoor low-volatility requirements.

③ For solvent-free epoxy systems in Malaysian food plants, ultra-high-viscosity silicone oil is prohibited to avoid resin stratification and incomplete curing.

4.5.4 Eapearl Chemical Dimethyl Silicone Oil Core Advantages for Epoxy Factories

1. Full-viscosity stock covers mainstream waterborne/solvent/solvent-free epoxy formulations in Southeast Asia; low-volatility specifications pass Singapore BC Green Mark VOC audits.

2. Low-cyclosiloxane silicone oil customized for Southeast Asia's year-round high-temperature, high-humidity climate, suitable for local construction environments.

3. Sample provision and one-on-one online technical support to resolve common film defects such as pinholes, orange peel, and efflorescence.

4.6 Other General Paint and Ink Applications

General paint and ink defoaming, automotive epoxy polishing additives, laboratory epoxy curing constant-temperature oil bath thermal conductive media.

V. Global Formulation Pitfall Avoidance Guide (Overseas Purchasing Essentials)

1. Resin Compatibility Limitations of Pure Dimethyl Silicone Oil

Direct high-proportion addition to epoxy, polyurethane, or acrylic resins causes fish-eyes and craters; adhesion test ASTM D3359 fails. For projects with high leveling requirements, polyether-modified silicone products based on this material are recommended.

2. Viscosity and Flash Point Differentiation for Factory Safety

Silicone oils with viscosity below 50 cSt have relatively lower flash points; workshops require ventilation and anti-static measures, complying with IEC industrial safety standards.

3. No Inter-Grade Substitution

Industrial-grade silicone oil contains trace catalyst residues and must not be added to epoxy coatings for food-contact equipment; food-grade certified products must be procured for food application scenarios.

4. High-Temperature Baking Epoxy Selection Criteria

For steel structure anti-corrosion epoxy baked above 120°C, select low-weight-loss silicone oil to ensure no oil exudation during long-term high-temperature service.

VI. Anhui Eapearl Chemical Global Delivery Exclusive Support Services

1. Full-Viscosity Stock Availability: Long-term inventory of epoxy-dedicated 10/50/100/350 cSt grades. Customization of low-volatility, low-cyclosiloxane special specifications available to meet green building tender requirements.

2. International Packaging Options: 25L plastic drums, 200L galvanized steel drums (net weight 170kg), 1000L IBC totes.

3. Export Documentation: Complete customs clearance documents provided with every shipment, customized support services, and overseas technical support.

4. Multi-Warehouse Distribution: Qingdao warehouse, Nanjing export warehouse, and Shanghai export warehouse, ensuring stable shipping lead times to all countries. Samples dispatched within 3 working days.

VII. Global Storage and Operational Safety Standards (Compliant with UN IMDG Maritime Standards)

1. Store sealed in a cool, dry warehouse away from strong acids, strong bases, and strong oxidizers. Comply with the International Maritime Dangerous Goods (IMDG) Code.

2. For low-viscosity silicone oil storage and production workshops, equip anti-static and explosion-proof ventilation facilities to meet environmental safety audits.

3. During handling, wear safety goggles and nitrile gloves, complying with ISO personal protective equipment standards; avoid prolonged eye contact.

4. Collect waste silicone oil uniformly as industrial liquid waste; discharge into the environment is strictly prohibited, in compliance with ASEAN wastewater environmental protection regulations.

VIII. Conclusion

Anhui Eapearl Chemical's full range of dimethyl silicone oils is developed for epoxy flooring and industrial anti-corrosion paint applications in European, Southeast Asian, South African, and other overseas markets. The products fully comply with international safety export standards, with complete export clearance documentation available. They specifically address common epoxy construction defects in tropical high-temperature, high-humidity environments, including foaming, pinholes, orange peel, and insufficient adhesion.

Our company maintains long-term stable cooperation with Southeast Asian epoxy coating manufacturers, flooring engineering contractors, and food/pharmaceutical equipment manufacturing enterprises. We provide free samples, custom formulation optimization services, and stable maritime supply chains, helping overseas customers meet local environmental VOC requirements and green building tender specifications.