AOHP-1020

Technical Data Sheet: Antmee® OH Polymer – Hydroxy Terminated Polydimethylsiloxane

Product Name: Antmee® OH Polymer
Chemical Description: α,ω-Dihydroxy Polydimethylsiloxane / Silanol Terminated Polydimethylsiloxane
CAS Number: 70131-67-8
Molecular Structure: HO-[Si(CH₃)₂O]n-H

1. Product Overview

Antmee® OH Polymer is a series of linear, reactive polydimethylsiloxane fluids and gums terminated with silanol (-OH) functional groups at both chain ends. These polymers combine the inherent flexibility, thermal stability, and hydrophobicity of the silicone backbone with the condensation reactivity of terminal hydroxyl groups. This bifunctional reactivity makes Antmee® OH Polymer an essential base polymer for room-temperature vulcanizing (RTV) silicone rubbers, a key intermediate for synthesizing higher molecular weight silicone gums, and an effective structure control agent in silicone compounding.

The series spans an exceptionally broad viscosity range, from low-viscosity reactive fluids (5 cSt) to ultra-high molecular weight gums (up to 20,000,000 cSt), allowing formulators precise control over crosslink density, mechanical properties, and processing characteristics.

2. Typical Physical & Chemical Properties

The following specifications represent the general physical properties of the Antmee® OH Polymer series. Actual values vary significantly depending on the molecular weight and corresponding viscosity grade.

• Appearance: Clear, colorless to pale yellow transparent liquid or semi-solid gum (Visual)

• Viscosity Range (at 25°C): 5 cSt to 20,000,000 cSt (mm²/s)

• Active Content: ≥ 98-100%

• Density (at 25°C): Approx. 0.95 – 0.98 g/mL

• Hydroxyl Content: Inversely proportional to molecular weight; lower viscosity grades contain higher -OH content and thus exhibit higher reactivity

• Thermal Service Range: -50°C to +250°C (continuous use)

• Solubility: Soluble in aromatic and aliphatic solvents (toluene, xylene, chloroform); low molecular weight grades show slight water solubility; high molecular weight gums require solvent dilution for handling

Disclaimer: Typical values are representative of average production lots and should not be interpreted as guaranteed batch-specific specifications. Minor variations are expected due to normal manufacturing tolerances.

3. Standard Specifications by Viscosity Grade

Please refer to the specific Antmee® product code for detailed Certificate of Analysis (CoA) data.

Antmee® OH-5 to OH-100 (Viscosity Range: 5 cSt to 100 cSt)
These are low molecular weight, low-viscosity reactive fluids characterized by relatively high hydroxyl content. They exhibit high reactivity in condensation reactions and serve as reactive diluents, chain extenders, and intermediates for synthesizing block copolymers and modified silicone fluids. These grades are also widely used as structure control agents in silicone rubber compounding to prevent “structuring” (crepe hardening) by reacting with the silanol groups on silica filler surfaces, thereby improving processing characteristics and extending shelf life.

Antmee® OH-750 to OH-10000 (Viscosity Range: 750 cSt to 10,000 cSt)
This is the core workhorse range for condensation-cure RTV silicone rubber formulations. These medium-viscosity OH polymers serve as the primary base polymer for one-component and two-component sealants, encapsulants, and molding compounds. They provide an optimal balance of flowability before cure and mechanical strength after crosslinking. When formulated with crosslinkers (such as alkoxysilanes) and catalysts, they cure at room temperature to form elastic, weather-resistant silicone elastomers.

Antmee® OH-50000 to OH-150000 (Viscosity Range: 50,000 cSt to 150,000 cSt)
High molecular weight hydroxy-terminated polymers exhibiting a honey-like or semi-solid consistency. Often referred to as “107 silicone rubber base” in industry terminology, these grades are the foundation for high-elongation, high-tensile-strength silicone elastomers. They provide superior mechanical properties and are used in premium sealants, gaskets, and molded silicone goods requiring excellent tear resistance and recovery.

Antmee® OH-1M to OH-20M (Viscosity Range: 1,000,000 cSt to 20,000,000 cSt)
Ultra-high molecular weight silicone gums with extremely low hydroxyl content. These materials are highly viscoelastic solids that exhibit cold flow. They are primarily used as the base gum for millable high-consistency rubber (HCR) compounds and as masterbatch carriers. When compounded with fillers and vulcanizing agents (typically peroxides), these gums yield silicone elastomers with maximum physical strength, heat resistance, and compression set resistance. Due to their extreme viscosity, these grades typically require solvent processing or high-torque mixing equipment.

4. Primary Applications

• RTV Silicone Rubber Base Polymer: Antmee® OH Polymer (particularly the 750-10000 cSt range) is the fundamental raw material for condensation-cure RTV silicones used in construction sealants, automotive gasketing, electronic potting, and mold making.

• Silicone Rubber Compounding (Structure Control Agent): Low viscosity OH polymers (5-100 cSt) are added to silicone rubber compounds to react with the silanol groups on reinforcing silica fillers. This prevents premature crosslinking (structuring) during storage and improves filler dispersion, resulting in better processing and extended shelf life.

• Synthesis Intermediate: Used as a starting material for producing higher molecular weight silicone gums, amino-functional silicones, and various organic-silicone copolymers via condensation or hydrosilylation chemistry.

• Textile and Leather Treatment: Emulsified OH polymers serve as durable softening agents and water repellents for fabrics, paper, and leather. The terminal hydroxyl groups allow for self-crosslinking or reaction with fabric substrates, providing washfast softness.

5. Packaging and Storage Information

• Packaging Options: Low to medium viscosity grades (5-10000 cSt) are available in 20 kg pails, 50 kg HDPE drums, or 200 kg steel drums. High viscosity gums (1M-20M cSt) are typically packaged in 20 kg pails or specially lined 200 kg drums to facilitate removal. Custom packaging available upon request.

• Shelf Life: 12 months from the date of manufacture when stored in the original, unopened container under recommended conditions.

• Technical Data Sheet: Antmee® OH Polymer – Hydroxy Terminated Polydimethylsiloxane

  Product Name: Antmee® OH Polymer
  Chemical Description: α,ω-Dihydroxy Polydimethylsiloxane / Silanol Terminated Polydimethylsiloxane
  CAS Number: 70131-67-8
  Molecular Structure: HO-[Si(CH₃)₂O]n-H

  1. Product Overview

  Antmee® OH Polymer is a series of linear, reactive polydimethylsiloxane fluids and gums terminated with silanol (-OH) functional groups at both chain ends. These polymers combine the inherent flexibility, thermal stability, and hydrophobicity of the silicone backbone with the condensation reactivity of terminal hydroxyl groups. This bifunctional reactivity makes Antmee® OH Polymer an essential base polymer for room-temperature vulcanizing (RTV) silicone rubbers, a key intermediate for synthesizing higher molecular weight silicone gums, and an effective structure control agent in silicone compounding.

  The series spans an exceptionally broad viscosity range, from low-viscosity reactive fluids (5 cSt) to ultra-high molecular weight gums (up to 20,000,000 cSt), allowing formulators precise control over crosslink density, mechanical properties, and processing characteristics.

  2. Typical Physical & Chemical Properties

  The following specifications represent the general physical properties of the Antmee® OH Polymer series. Actual values vary significantly depending on the molecular weight and corresponding viscosity grade.

  • Appearance: Clear, colorless to pale yellow transparent liquid or semi-solid gum (Visual)

  • Viscosity Range (at 25°C): 5 cSt to 20,000,000 cSt (mm²/s)

  • Active Content: ≥ 98-100%

  • Density (at 25°C): Approx. 0.95 – 0.98 g/mL

  • Hydroxyl Content: Inversely proportional to molecular weight; lower viscosity grades contain higher -OH content and thus exhibit higher reactivity

  • Thermal Service Range: -50°C to +250°C (continuous use)

  • Solubility: Soluble in aromatic and aliphatic solvents (toluene, xylene, chloroform); low molecular weight grades show slight water solubility; high molecular weight gums require solvent dilution for handling

  Disclaimer: Typical values are representative of average production lots and should not be interpreted as guaranteed batch-specific specifications. Minor variations are expected due to normal manufacturing tolerances.

  3. Standard Specifications by Viscosity Grade

  Please refer to the specific Antmee® product code for detailed Certificate of Analysis (CoA) data.

  Antmee® OH-5 to OH-100 (Viscosity Range: 5 cSt to 100 cSt)
  These are low molecular weight, low-viscosity reactive fluids characterized by relatively high hydroxyl content. They exhibit high reactivity in condensation reactions and serve as reactive diluents, chain extenders, and intermediates for synthesizing block copolymers and modified silicone fluids. These grades are also widely used as structure control agents in silicone rubber compounding to prevent “structuring” (crepe hardening) by reacting with the silanol groups on silica filler surfaces, thereby improving processing characteristics and extending shelf life.

  Antmee® OH-750 to OH-10000 (Viscosity Range: 750 cSt to 10,000 cSt)
  This is the core workhorse range for condensation-cure RTV silicone rubber formulations. These medium-viscosity OH polymers serve as the primary base polymer for one-component and two-component sealants, encapsulants, and molding compounds. They provide an optimal balance of flowability before cure and mechanical strength after crosslinking. When formulated with crosslinkers (such as alkoxysilanes) and catalysts, they cure at room temperature to form elastic, weather-resistant silicone elastomers.

  Antmee® OH-50000 to OH-150000 (Viscosity Range: 50,000 cSt to 150,000 cSt)
  High molecular weight hydroxy-terminated polymers exhibiting a honey-like or semi-solid consistency. Often referred to as “107 silicone rubber base” in industry terminology, these grades are the foundation for high-elongation, high-tensile-strength silicone elastomers. They provide superior mechanical properties and are used in premium sealants, gaskets, and molded silicone goods requiring excellent tear resistance and recovery.

  Antmee® OH-1M to OH-20M (Viscosity Range: 1,000,000 cSt to 20,000,000 cSt)
  Ultra-high molecular weight silicone gums with extremely low hydroxyl content. These materials are highly viscoelastic solids that exhibit cold flow. They are primarily used as the base gum for millable high-consistency rubber (HCR) compounds and as masterbatch carriers. When compounded with fillers and vulcanizing agents (typically peroxides), these gums yield silicone elastomers with maximum physical strength, heat resistance, and compression set resistance. Due to their extreme viscosity, these grades typically require solvent processing or high-torque mixing equipment.

  4. Primary Applications

  • RTV Silicone Rubber Base Polymer: Antmee® OH Polymer (particularly the 750-10000 cSt range) is the fundamental raw material for condensation-cure RTV silicones used in construction sealants, automotive gasketing, electronic potting, and mold making.

  • Silicone Rubber Compounding (Structure Control Agent): Low viscosity OH polymers (5-100 cSt) are added to silicone rubber compounds to react with the silanol groups on reinforcing silica fillers. This prevents premature crosslinking (structuring) during storage and improves filler dispersion, resulting in better processing and extended shelf life.

  • Synthesis Intermediate: Used as a starting material for producing higher molecular weight silicone gums, amino-functional silicones, and various organic-silicone copolymers via condensation or hydrosilylation chemistry.

  • Textile and Leather Treatment: Emulsified OH polymers serve as durable softening agents and water repellents for fabrics, paper, and leather. The terminal hydroxyl groups allow for self-crosslinking or reaction with fabric substrates, providing washfast softness.

  5. Packaging and Storage Information

  • Packaging Options: Low to medium viscosity grades (5-10000 cSt) are available in 20 kg pails, 50 kg HDPE drums, or 200 kg steel drums. High viscosity gums (1M-20M cSt) are typically packaged in 20 kg pails or specially lined 200 kg drums to facilitate removal. Custom packaging available upon request.

  • Shelf Life: 12 months from the date of manufacture when stored in the original, unopened container under recommended conditions.

  • Storage Conditions: Store in a cool, dry, and well-ventilated area away from direct sunlight and sources of ignition. Keep containers tightly sealed to prevent contamination and unintended reaction with atmospheric moisture. Recommended storage temperature range: 0°C to 35°C. High-viscosity gums should be stored at stable temperatures to minimize cold flow.

Product Name: Antmee® Silicone Oil Food Grade
Chemical Description: Polydimethylsiloxane (PDMS) / Dimethylpolysiloxane
CAS Number: 63148-62-9
Grade Designation: 350F cSt / 1000F cSt (Food Grade / NSF Registered)

1. Product Overview

Antmee® Silicone Oil 350F and 1000F are high-purity, linear polydimethylsiloxane fluids specifically manufactured to meet stringent requirements for incidental food contact and pharmaceutical processing applications. These clear, odorless, and non-toxic fluids are formulated to comply with relevant FDA 21 CFR regulations and/or NSF H1 standards for lubricants with incidental food contact. They provide excellent lubrication, release, and defoaming properties without imparting taste, odor, or contamination to the end product. The 350F and 1000F grades offer distinct viscosity options to match specific processing and film thickness requirements in sensitive manufacturing environments.

2. Typical Physical & Chemical Properties

The following specifications represent the general physical properties of the Antmee® Food Grade Silicone Oil series. These values are typical for the 350F cSt and 1000F cSt grades.

• Appearance: Crystal clear, colorless, transparent liquid (Visual)

• Viscosity Grades (at 25°C): 350 cSt (350F) and 1,000 cSt (1000F) (mm²/s)

• Active Content: 100 %

• Density (at 25°C): Approx. 0.970 – 0.975 g/mL

• Refractive Index (at 25°C): Approx. 1.403 – 1.404

• Volatility (Weight Loss at 150°C/24h): Less than 0.5% (Essentially non-volatile)

• Pour Point: Approx. -50°C

• Taste/Odor: Essentially tasteless and odorless

Disclaimer: Typical values are representative of average production lots and should not be interpreted as guaranteed batch-specific specifications. Please refer to specific regulatory documentation for compliance statements.

3. Standard Specifications by Viscosity Grade

Please refer to the specific Antmee® product code for detailed Certificate of Analysis (CoA) and regulatory conformance certificates.

Antmee® PDMS-350F (Viscosity 350 cSt, Food Grade)
This is the global industry standard viscosity for food-grade applications. Antmee® PDMS-350F offers an optimal balance between ease of application (pourability and pumpability) and sufficient film strength for effective lubrication and release. It is widely specified as an anti-foaming agent in food and beverage processing, a lubricant for filling machine slides and conveyor chains, and a protective coating for food handling equipment.

Antmee® PDMS-1000F (Viscosity 1,000 cSt, Food Grade)
A higher viscosity food-grade fluid that provides a thicker, more durable lubricating film with enhanced resistance to wash-off. Antmee® PDMS-1000F is recommended for applications where longer-lasting lubrication is required or where water spray and steam cleaning are frequent. It offers superior adhesion to vertical metal surfaces and provides excellent release properties for sticky food products such as confectionery, baked goods, and meat processing.

4. Primary Applications

• Food Processing Equipment Lubrication: Ideal for lubricating bearings, chains, slides, and guide rails on filling, capping, and packaging machinery in food and beverage plants. Its inert nature ensures it will not turn rancid or form gummy deposits like organic oils.

• Defoaming and Antifoaming Agent: Effective as an antifoam in aqueous food processing systems (within regulatory limits) including sugar refining, fermentation processes, soft drink production, and vegetable washing. The 350F grade disperses readily in water-based systems to control foam.

• Mold Release Agent: Used as a release agent for food molds (baking pans, candy molds, meat trays) to prevent sticking without transferring taste or odor to the food product.

• Pharmaceutical and Cosmetic Processing: Suitable as a lubricant for tablet press machinery and other pharmaceutical processing equipment where incidental contact with the product may occur. Also used as a key ingredient in personal care products requiring high purity standards.

5. Regulatory Compliance and Storage Information

• Typical Compliance References: Manufactured to comply with the requirements of FDA 21 CFR 178.3570 (Lubricants with incidental food contact) and may be suitable for use as a component under 21 CFR 173.340 (Defoaming agents). Please inquire for specific NSF H1 registration status.

• Packaging Options: Available in 20 kg pails, 190 kg / 200 kg steel drums. Special cleaning procedures are maintained for food-grade packaging lines to prevent cross-contamination.

• Shelf Life: 60 months (5 years) from the date of manufacture when stored in the original, unopened container.

• Storage Conditions: Store in a clean, dry, and well-ventilated area. Keep containers tightly sealed when not in use to prevent contamination by dust or foreign materials. Protect from freezing (though freezing does not harm the chemical structure, it may temporarily increase viscosity).