Silicone oils

Brand: Castchem Company type: Manufacturer Mini Order Quantity: 200 KG Supply Ability: 300MT/Month Applications: See TDS Product Grade: Industrial grade Country of origin: QuZhou/ZheJiang/China

Category：

Silicone oil

Keyword：

Silicone oils

0086-571-86370688

info@zj-castchem.com

Wu Jiong：008615068719527

Inquiry

Details

Product Overview
Methyl Hydrogen Silicone Fluid 202 is a polymethylhydrosiloxane-based fluid in which hydrogensubstituents partially replace methyl groups in dimethyl silicone structures. This high-performancesilicone fluid is engineered to deliver exceptional water repellency and crosslinking functionality acrossdiverse industrial applications. lts low volatility, high hydrogen content, and compatibility withorganic/inorganic matrices make it a versatile additive for enhancing material durability andperformance.

Chemical & Physical Properties

Property	Specification	Test Method
Chemical Name	Polymethylhydrosiloxane	-
CAS No.	63148-57-2	-
Appearance	Colorless,odorless transparent liquid	Visual
Hydrogen Content	1.58-1.60%	HG/T 4804-2015
Viscosity (25°℃)	20.00-25.00 mm2/s	HG/T 4804-2015
Density (25℃)	0.995-1.015 g/cm³	HG/T 4804-2015
Refractive Index (25°)	1.390-1.410	HG/T 4804-2015
Flash Point	>160℃	HG/T 4804-2015
Volatile Content	≤2.0%	HG/T 4804-2015
pH Value	6-7(HCl<5 ppm)	HG/T 4804-2015

Key Features
· High Hydrogen Content: Enables efficient crosslinking in silicone-based formulations.
· Low Volatility: Ensures stability under high-temperature processing.
· Hydrophobic Performance: Forms durable water-repellent films on substrates.
· Chemical Inertness: Resists degradation from acids, alkalis, and moisture.
· Broad Compatibility: Integrates with emulsions, resins, and inorganic matrices.

Applications
1. Construction Materials
· Waterproofing additive for gypsum, cement, marble, and ceramic substrates.
· Reduces water absorption in building gypsum by up to 70% (tested at 0.6-0.8% dosage).
· Improves softening coefficient by 70% (enhancing wet-state strength retention).
2. Textile Treatment
· Blends with hydroxyl silicone emulsions to create breathable, waterproof fabrics.

· Enhances tear strength, abrasion resistance, and antifouling properties.

3.Industrial Coatings
· Hydrophobic treatment for glass, metals, leather, and fire-extinguishing powders.

· Crosslinking agent for release papers and silicone rubber.

4. Specialty Formulations
· Base material for MH emulsions (e.g. SILRES® BS 94, Rhodorsil® H68 equivalents)

Packaging & Storage
· Packaging:

o 200 kg/drum (plastic-coated iron drum)

o 1000 kg/lBC(intermediate bulk container)

· Transport: Classified as non-hazardous under standard regulations.

· Storage:
o Store in sealed containers at <30°C, away from direct sunlight.
o Avoid contact with acids, alkalis, or moisture.
o Shelf life: 6 months (post-expiry use permitted after quality verification).

Equivalent Products
Methyl Hydrogen Silicone Fluid 202 is functionally comparable to:
· MH-1107 (Dow Corning)
· TSF-484/DF-1040(Momentive)
· Rhodorsil® H68 (Rhodia)
· SILRES® BS 94 (Wacker)
· KF-99 (Shin-Etsu)

Technical Validation
Case Study: Waterproofing Performance in Building Gypsum
· Test Conditions:
o Gypsum-water ratios: 0.45-0.60
o CASTCHEM202 dosage: 0.2-1.0%

· Results:
o Water Absorption: Reduced to 7.6% (vs. 22.8% control at 0.45 ratio).

o Softening Coefficient: Increased by 70% (critical for wet-strength retention).

o Mechanical Strength: Optimal at 0.6% dosage; excessive addition (>0.8%) may reducecompressive strength by ≤10.3%.
Mechanism: Polysiloxane chains form a hydrophobic membrane within gypsum pores, minimizing wateringress while maintaining air permeability.

Safety & Compliance
· Handling: Use PPE (gloves, goggles) to avoid prolonged skin contact.
· Regulatory: Compliant with HG/T 4804-2015 (China) and global industrial standards.

For detailed technical support or custom formulation inquiries, contact our R&D team.Zhejiang Castchem New Material Co., LtdInnovating Silicone Solutions for Industrial Excellence

Zhejiang Castchem New Material Co., Ltd, CN. 324002
Castchem markets this product through the following entities:
Castchem Hangzhou factory, Ltd
Castchem Quzhou factory, Ltd
For the contact details of Castchem, please visit www.zj-castchem.com or www.china-castchem.com
Contact Person: Eowyn Jiang
Inquiry: eowyn@zj-castchem.com
Technology consulting:+86-571-56396961
Tel:+86-17857651655
Before using a product sold by one of the Castchem family of companies, users should make theirindependent determination that the product is suitable for the intended use and can be used safely
and legally.
SELLER MAKES ON WARRANTY: EXPRESS OR IMPLIED(INCLUDING AND WARRANTY OFMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE)OTHER THAN AS SEPARATELYAGREED
BETWEEN THE PARTIES IN WRITING.
Release Date: Feb 27,2019