Silane coupling agent KH-845-4 (foreign brands SI69)
Product Description:
KH-845-4 is a bifunctional four sulfur silane, foreign brands for the Si-69 (Degussa, Germany), A-1289 (United Carbide).
Chemical Name: Double - (γ-triethoxy acrylic base) tetrasulfide
Chemical Structure: (C2H5O) 3SiCH2CH2CH2S4CH2CH2CH2Si (OC2H5) 3
Physical properties:
Appearance: yellow liquid Total sulfur content: 22.0 ± 1.0%
Weight: 1.08 (20 ℃) ??Flash point> 100 ℃ decomposition temperature> 250 ℃
Soluble in: lower alcohols, acetone, benzene, white oil and other organic solvents, insoluble in water, water hydrolysis.
Main purposes:
KH-845-4 is mainly used for rubber industry, is a multifunctional rubber additives, especially for colorless or light-colored, high-performance, special requirements of the products, the ability to improve the reinforcing filler, but also the curing system to improve the performance of an important part of the cross-linking. Main role is as follows:
Coupling-KH-845-4 can be non-carbon black filler and rubber banded together well, thereby increasing the modulus and wear resistance products.
Balance of sulfide-KH-845-4 molecule has four sulfur atoms, in the curing process, sulfur and sulfur in a number of cross-linking reaction. And KH-845-4 alkyl group in the four sulfur crosslinking rate of sulfur and sulfur vulcanization reversion rate substantially the same, so can anti-reversion, and the formation of the appropriate anti-reversion compounds. One dynamic bending properties (such as: fever, crack extension, etc.) have been significantly improved.
Curing agent-KH-845-4 four sulfur atoms in the molecule can play the role of sulfide and promote activity in the curing device to enhance or alter the aging effect.
The products are widely used: tires, rubber soles, rubber roller, belt and other rubber products, the products can improve wear resistance, elongation strength, tear strength, increase the heat aging and improve the bending resistance, but also can improve the mixing processing performance, rheological properties, reducing energy consumption.
Instructions:
Also known to promote adhesion promoter or coupling agent surface treatment agent is a kind of gender structure of the material, which in the end of the molecular groups with inorganic surface groups react to form strong chemical bonds; other end have an affinity for organic properties, and reactions of organic molecules or physical wound, thereby putting two very different nature of the material firmly together.
Silica filler added KH-845-4, the rubber vulcanization crosslinking points in the silicon filled more than four sulfides in sulfur-based group, this group of active cell lysis with the rubber molecules react with the fillerrubber combine to produce filler - rubber bond structure. Currently, this structure is considered to be reinforced to improve the ability to fill the best way, while changing the vulcanizates crosslinked network structure, changed the rubber compound of more sulfur bonds, disulfide bonds, the proportion of single-sulfur bond can be ability to increase 300% elongation, anti-sulfide reduction performance improvement.
In the mixing of rubber, the first half of fillers and add all the coupling agent, filler, and then add the remaining oil, and finally adding ZnO, stearic acid and other additives. Mixing time depends on the degree to which dispersion temperature of 80-180 ℃, the entire production process to maintain adequate ventilation.
Note:
1, the amount of: General KH-845-4 accounts for the rubber with the amount of 1% or 5-8% of total amount of filler;
2, Storage: Store product at 10-40 ℃ closed containers in a dry, cool, to prevent prolonged sun exposure, away from sources of ignition, avoid contact with moist acidic medium, easy to form siloxane.
Product Description:
KH-845-4 is a bifunctional four sulfur silane, foreign brands for the Si-69 (Degussa, Germany), A-1289 (United Carbide).
Chemical Name: Double - (γ-triethoxy acrylic base) tetrasulfide
Chemical Structure: (C2H5O) 3SiCH2CH2CH2S4CH2CH2CH2Si (OC2H5) 3
Physical properties:
Appearance: yellow liquid Total sulfur content: 22.0 ± 1.0%
Weight: 1.08 (20 ℃) ??Flash point> 100 ℃ decomposition temperature> 250 ℃
Soluble in: lower alcohols, acetone, benzene, white oil and other organic solvents, insoluble in water, water hydrolysis.
Main purposes:
KH-845-4 is mainly used for rubber industry, is a multifunctional rubber additives, especially for colorless or light-colored, high-performance, special requirements of the products, the ability to improve the reinforcing filler, but also the curing system to improve the performance of an important part of the cross-linking. Main role is as follows:
Coupling-KH-845-4 can be non-carbon black filler and rubber banded together well, thereby increasing the modulus and wear resistance products.
Balance of sulfide-KH-845-4 molecule has four sulfur atoms, in the curing process, sulfur and sulfur in a number of cross-linking reaction. And KH-845-4 alkyl group in the four sulfur crosslinking rate of sulfur and sulfur vulcanization reversion rate substantially the same, so can anti-reversion, and the formation of the appropriate anti-reversion compounds. One dynamic bending properties (such as: fever, crack extension, etc.) have been significantly improved.
Curing agent-KH-845-4 four sulfur atoms in the molecule can play the role of sulfide and promote activity in the curing device to enhance or alter the aging effect.
The products are widely used: tires, rubber soles, rubber roller, belt and other rubber products, the products can improve wear resistance, elongation strength, tear strength, increase the heat aging and improve the bending resistance, but also can improve the mixing processing performance, rheological properties, reducing energy consumption.
Instructions:
Also known to promote adhesion promoter or coupling agent surface treatment agent is a kind of gender structure of the material, which in the end of the molecular groups with inorganic surface groups react to form strong chemical bonds; other end have an affinity for organic properties, and reactions of organic molecules or physical wound, thereby putting two very different nature of the material firmly together.
Silica filler added KH-845-4, the rubber vulcanization crosslinking points in the silicon filled more than four sulfides in sulfur-based group, this group of active cell lysis with the rubber molecules react with the fillerrubber combine to produce filler - rubber bond structure. Currently, this structure is considered to be reinforced to improve the ability to fill the best way, while changing the vulcanizates crosslinked network structure, changed the rubber compound of more sulfur bonds, disulfide bonds, the proportion of single-sulfur bond can be ability to increase 300% elongation, anti-sulfide reduction performance improvement.
In the mixing of rubber, the first half of fillers and add all the coupling agent, filler, and then add the remaining oil, and finally adding ZnO, stearic acid and other additives. Mixing time depends on the degree to which dispersion temperature of 80-180 ℃, the entire production process to maintain adequate ventilation.
Note:
1, the amount of: General KH-845-4 accounts for the rubber with the amount of 1% or 5-8% of total amount of filler;
2, Storage: Store product at 10-40 ℃ closed containers in a dry, cool, to prevent prolonged sun exposure, away from sources of ignition, avoid contact with moist acidic medium, easy to form siloxane.