High Quality Sulfur Silane Coupling Agent – Sulfur-Silane Coupling Agent, liquid HP-669/SI-69, CAS No. 40372-72-3, Bis-[3-(triethoxysilyl)-propyl]-tetrasulfide – Hungpai
High Quality Sulfur Silane Coupling Agent – Sulfur-Silane Coupling Agent, liquid HP-669/SI-69, CAS No. 40372-72-3, Bis-[3-(triethoxysilyl)-propyl]-tetrasulfide – Hungpai Detail:
Chemical Name
Bis-[3-(triethoxysilyl)-propyl]-tetrasulfide
Structural Formula
(C2H5O)3SiCH2CH2CH2-S4-CH2CH2CH2Si(OC2H5)3
CAS Number
40372-72-3
Equivalent Product Name
SI-69 (Degussa),Z-6940 (Dowcorning),A-1289 (Crompton),
KBE-846 (Shin-Etsu),KH-845-4 (China)
Physical Properties
It’s a pale yellow clear liquid with light odor of alcohol and soluble easily in alcohol, acetone, benzene, toluene etc. It’s insoluble in water. It can hydrolyze when contact with water or moisture. specific gravity is 1.08g/ml.
Specifications
Appearance |
Light yellow clear liquid |
Alcohol Content |
£ 0.5% |
γ2 Contentα |
£ 3.0% |
Other Impurities Contentβ |
£ 1.0% |
Viscosity 25℃ (cps) |
£ 19.0 |
Sulfur Content |
22 ± 1% |
α γ2: γ-chloropropyltriethoxy silane. β: mainly contains some silane impurities.
Application Range
HP-669 is used successfully in the rubber industry as a dual functional organic poly sulfur silane coupling agent.
HP-669 can be used in the vulcanized rubber system with fillers such as silica, fiberglass, talc powder, mica powder and clay as reinforcing agent. It can improve the reinforcing properties of fillers and rubber abrasive resistance properties.
It is suitable to be used as rubber additive—vulcanizing agent and activator in polymers such as NR, IR, SBR, BR, NBR and EPDM.
In the process of vulcanization, the crosslinking rate of poly-sulfur alkyl is the same as deoxidizing rate of sulfur, so it act to resist deoxidization of vulcanization, and then improve dynamic bending properties such as heat build up and cracks expansion .The four sulfur atoms can act as activator for vulcanization.
In dynamic and static conditions, It is used for producing these rubber products: tire, hose, rubber roll, belting, cable, footwear and mechanical founding products. It can improve abrasive resistance, cutting resistance and pressure resistance, reduce hysteresis loss and hygroscopicity, improve mechanical and adhesive properties, and increase thermal ageing performance, modulus and flex life.
Add sulfur-silane coupling agent in the industry of rubber tire, it’s not only debase the risk of puncture as temperature too high running on the high speed road or long time, but also reduce roll resistance of tire, then reduce the consume of gasoline, the emissions quantity of CO2 as to accord the environmental protection of carbon reduction.
Dosage
Recommend dosage:1.0-4.0 PHR.
Package and storage
1. Package: 25kg or 200 kg or 1000kg in plastic drum.
2. Sealed storing:Keep in the cool, dry and well-ventilated places.
3. Storage life:Longer than two years in normal storage conditions.
Product detail pictures:
Related Product Guide:
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