Silicone Chemicals for Semicon and New Energy
Silicone Chemicals for Semicon and New Energy
Products/YK Grade
Vinyl-terminated silicone oil
YK-273
Chemical Structure
CAS
68083-19-2
Technical Indicators
Colorless transparent liquid
Viscosity （25℃，mPa.s）：40-12,000
Vinyl content （mmol/g）：0.039-0.620
Volatile matter（% ）≤1.50
Applications
This is a high-performance and highly reactive intermediate. It retains the general properties of methyl silicone oil such as smoothness, softness, gloss, heat resistance and weather resistance, and features the following characteristics and applications:
1. High reactivity of terminal vinyl groups. It can undergo addition reaction with hydrogen-containing silicone oil under catalyst action, and participate in various other chemical reactions.
2. Better compatibility with organic materials than conventional methyl silicone oil, facilitating blending with diverse organic substances.
3. Active double bonds enable easy reaction with polyurethane, acrylic and other organic materials.
4. Mainly applied in the preparation of liquid silicone rubber.
Products/YK Grade
Methylhydrosiloxane
YK-203
Chemical Structure
CAS
68037-59-2
Technical Indicators
Colorless transparent liquid
Viscosity（25℃，mPa.s）：2-1,000
Hydrogen content（%）：0.045-1.30
Applications
This product contains active functional groups. It can react with compounds bearing double bonds, hydroxyl groups and other functional groups under catalyst action. It is mainly used as basic raw material for foam stabilizers, defoamers, hydrophilic silicone oil and other chemical products.
Products/YK Grade
End side
hydrogen-containing
silicone oil
YK-613
Chemical Structure
CAS
69013-23-6
Technical Indicators
Colorless transparent liquid
Viscosity（25℃，mPa.s）：1-1,000
Hydrogen content（%）：0.015-1.600
Applications
1. Serves as key starting material for silicone-modified block and graft copolymers to synthesize various modified copolymers.
2. Acts as an important silicone intermediate, reacting with compounds containing double bonds, hydroxyl groups and other functional groups under catalysis to modify molecular structures.
3. With non-toxic, odorless properties and active functional groups, it introduces diverse modified groups at chain ends and sides for synthesizing high-performance silicone modified materials.
Products/YK Grade
T-branched
hydrogen-containing
silicone oil
YK-616T
Chemical Structure
CAS
/
Technical Indicators
Colorless transparent liquid
Hydrogen content（%） ：0.018-0.650
Viscosity （25℃，mPa.s）：1-350
Applications
1. Used as cross-linker and chain extender for addition-cure silicone rubber to enhance hardness, strength and heat resistance.
2. Applicable to silicone resins and coatings for improved hardness and thermal stability.
3. Suitable for surface treatment agents and release agents, forming dense films with stable waterproof and anti-sticking performance.
4. Serves as intermediate for modified silicone oils such as polyether, alkyl and epoxy modified types.
Products/YK Grade
Vinyl MQ Silicone Resin
YK-258
Chemical Structure
CAS
68584-83-8
Technical Indicators
Colorless transparent viscous liquid
Viscosity（25℃，mPa.s）：1,000-50,000
Vinyl content（mmol/g）：0.5-3.0
M:Q ratio：1.3-1.6:1
Applications
1. Applied as component of addition-cure silicone rubber to improve mechanical strength and physical properties of finished products.
2. Used as reactive monomer to copolymerize with olefins, acrylates and other monomers, endowing materials with excellent electrical insulation, water resistance and weather resistance.
Products/YK Grade
Hydrogen-terminated
silicone oil
YK-616
Chemical Structure
CAS
70900-21-9
Technical Indicators
Colorless transparent liquid
Molecular weigh：700-25,000
Viscosit（25℃，mPa·s）：2-1,500
Hydrogen content(%)：0.007-0.300
Applications
Used as silicone chain extender.
Products/YK Grade
Methacryloxy polysiloxane
YK-2821
Chemical Structure
CAS
58130-03-3
Technical Indicators
Colorless to pale yellow transparent liquid
Viscosity（25℃，mPa·s）：20-150
Refractive index：1.400-1.420
Applications
This product is polydimethylsiloxane doubly terminated with methacryloxypropyl dimethylsilyl group. It is a free-radical polymerizable and UV-curable macromonomer.
1. Copolymerize with various monomers or prepolymers containing carbon-carbon double bonds to introduce polysiloxane segments into polymer backbones.
2. Chemically modify acrylic resin, polyolefin resin and UV-curable coatings to enhance weather resistance, water resistance, flexibility and oxygen permeability.
3. Reduce internal stress and surface tension of materials and finished products. Viscosity and double bond content can be customized as required.
Products/YK Grade
Tetramethyl-
diphenyltrisiloxane
YK-232
Chemical Structure
CAS
17875-55-7
Technical Indicators
Colorless transparent liquid
Density （25℃，g/cm3）：0.90-1.00
Refractive index：1.4900-1.5100
Purity（GC，%）：QP≥98.0，PQ≥99.0
Acid value（ppm）≤10.0
Flash point (COC, ℃)：＞60
Applications
The product has good compatibility with methyl silicone oil, liquid silicone rubber, phenyl silicone rubber and phenyl silicone resin, and can be used as cross-linker for them.
Products/YK Grade
Phenyl
tris(dimethylsiloxy)silane
YK-235
Chemical Structure
CAS
18027-45-7
Technical Indicators
Colorless transparent liquid
Purity（GC，%）≥98.0
Refractive index：1.4000-1.5000
Density(25℃,g/cm3)：0.900-1.000
Acid value（ppm）≤10.0
Applications
The product features good compatibility with methyl silicone oil, liquid silicone rubber, phenyl silicone rubber and phenyl silicone resin.
1. Serve as cross-linker for addition-cure silicone rubber to facilitate crosslinking and curing, ensuring stable molding and performance.
2. Act as cross-linker for phenyl silicone rubber to improve crosslinking effect and boost mechanical properties and stability.
3. Used as cross-linker for phenyl silicone resin to accelerate crosslinking reaction and optimize hardness, heat resistance and other key properties.
Products/YK Grade
Phenyl
hydrogen-containing
silsesquioxane
YK-233
Chemical Structure
CAS
68952-30-7
Technical Indicators
Colorless transparent viscous liquid
Viscosity（25℃，mPa.s）：2,000/3,000/5,000
Refractive index：1.510-1.520
Flash point(COC, ℃) > 110
Hydrogen conten(%)： 0.20-0.40
Volatile matter（%）≤2.0
Applications
The product boasts good compatibility with methyl silicone oil, liquid silicone rubber, phenyl silicone rubber and phenyl silicone resin. Main applications:
1. Used as cross-linker for addition-cure silicone rubber to realize crosslinking and curing, ensuring stable molding and performance.
2. Applied as cross-linker for phenyl silicone rubber to improve crosslinking efficiency and enhance mechanical properties and stability.
3. Serves as cross-linker for phenyl silicone resin to accelerate crosslinking reaction and optimize service performance.
Products/YK Grade
Vinyl-terminated
methylphenyl polysiloxane
YK-252
Chemical Structure
CAS
225927-21-9
Technical Indicators
Colorless transparent oily liquid
Viscosity（25℃，mPa.s）：800-9,000
Refractive index：1.53-1.55
Volatile matter（%）≤1.0-2.0
Vinyl content（mmol/g）：0.20-0.70
Applications
Used as vinyl component for addition-curable phenyl silicone rubber and diluent for vinyl phenyl silicone resin.
Products/YK Grade
Phenyl vinyl silsesquioxane
YK-253
Chemical Structure
CAS
/
Technical Indicators
Viscosity（25℃，mPa.s）：4,000-6,000
Vinyl content(mmol/g )：0.90-2.10
Refractive index：1.510-1.530
Volatile matter（%）≤3.0
Applications
The product has good compatibility with phenyl silicone rubber and phenyl silicone resin, and can serve as reinforcing filler for them.
Products/YK Grade
Epoxy-terminated
diphenyltrisiloxane
YK-278
Chemical Structure
CAS
/
Technical Indicators
Pale yellow transparent liquid
Viscosity（25℃，mPa.s）：30-50
Epoxy value （mol/100g）：0.32-0.36
Applications
The product combines epoxy reactivity and superior properties of phenyl siloxane. It can modify various resin systems and effectively improve material toughness, heat resistance, moisture resistance and insulation performance. Widely applied in electronic encapsulation, optical protective coatings, thermal conductive powder modification and high-end composite materials.
Products/YK Grade
Epoxy-terminated
methylphenyltrisiloxane
YK-279
Chemical Structure
CAS
865811-59-2
Technical Indicators
Light yellow transparent liquid
Viscosity（25℃，mPa.s）：10-30
Epoxy value（mol/100g）：0.35-0.40
Applications
The product features epoxy reactivity and structural advantages of methylphenyl siloxane. It optimizes toughness, heat resistance, insulation, moisture resistance and anti-aging properties when modifying resins. Suitable for electronic encapsulant, precision optical coating, thermal conductive filler surface treatment and high-end composite substrates, enhancing product stability and service life.
Products/YK Grade
Single-ended methyl
single-ended trimethoxy
silicone oil
YK-6194
Chemical Structure
CAS
/
Technical Indicators
Colorless to pale yellow transparent liquid
Molecular weight： 950 - 2,500
Polydispersity index (PDI): ＜1.50
Viscosity （25°C，mPa·s）： 5-40
Free chloride ion content（ppm） < 20.0
Applications
The product is a macromolecular silane coupling agent terminated with inert organic group at one end and fast-reactive trimethoxysiloxy group at the other end. It features rapid hydrolysis capacity and can react with hydroxyl groups on the surface of inorganic fillers such as alumina and aluminum nitride. Inert polysiloxane segments are grafted onto filler surfaces after surface treatment, which effectively improves filler dispersibility and filling capacity in polysiloxane matrix, and greatly boosts thermal conductivity of thermal interface materials.
Products/YK Grade
Single-butyl terminated
trimethoxy
silicone oil
YK-6194B
Chemical Structure
CAS
/
Technical Indicators
Colorless to pale yellow transparent liquid
Molecular weight： 950 - 2,500
Polydispersity index (PDI): ＜1.50
Viscosity （25°C，mPa·s）： 5-40
Free chloride ion content（ppm） < 20.0
Applications
The product bonds and coats hydroxyl groups on thermal conductive fillers like alumina and aluminum nitride, greatly improving filler dispersion and loading ratio to enhance thermal conduction efficiency of thermal interface materials. Long carbon chain delivers outstanding heat resistance and hydrophobicity, suitable for high-temperature conditions. It is widely used for modification of new energy thermal conductive fillers and high-temperature resistant electronic encapsulation materials.
Products/YK Grade
Single-methyl terminated
hydroxyethoxypropyl
silicone oil
YK-2861
Chemical Structure
CAS
/
Technical Indicators
Colorless or pale yellow transparent liquid
Viscosity（25℃，mPa·s）： 15-400
Hydroxyl value（mgKOH/g）： 5-60
Applications
1. The product possesses single-terminal alcoholic hydroxyl group with reactivity comparable to EO-terminated polyols, applicable for synthesizing silicone-polyurethane/polyester block polymers.
2. Suitable for surface modification of ultrafine thermal conductive powder. It rapidly coats powder particles to enhance dispersibility and interfacial adhesion, effectively reducing thermal resistance with excellent insulation property, widely used in thermal conductive materials for precision electronics.
Products/YK Grade
Single-butyl terminated
hydroxyethoxypropyl
silicone oil
YK-2861B
Chemical Structure
