N-(n-Butyl)-3-aminopropyltrimethoxysilane

N-(n-Butyl)-3-aminopropyltrimethoxysilane is an amino silane coupling agent, chemically known as N-[3-(Trimethoxysilyl)propyl]butylamine, with CAS No. 31024-56-3. Its molecular formula is C₁₀H₂₅NO₃Si and molecular weight is approximately 235.4. It appears as a colorless to slightly yellowish transparent liquid at room temperature.

Product Description:

● Chemical Name: N-(n-Butyl)-3-aminopropyltrimethoxysilane; N-(n-Butyl)-γ-aminopropyltrimethoxysilane

● Product Code: EB1189

● CAS No.: 31024-56-3

● Molecular Formula: C₁₀H₂₅NO₃Si

● Structural Formula:

● Molecular Weight: 235.40

● EINECS No.: 250-437-8

● Appearance and Odor: Colorless or slightly yellowish transparent liquid, soluble in alcohols, aliphatic hydrocarbons, and aromatic hydrocarbons.

● Purity: ≥98.0%

 Hazardous Goods Transportation Number: 

●Equivalent Brands:Evonik Degussa 1189

Physical Properties:

● Density (25°C): 0.950 ± 0.02 g/ml

● Boiling Point: 238°C

● Refractive Index (25°C): 1.4246 ± 0.0050

Main Applications:

● Ink and coating industry

● Glass fiber treatment

● Filler systems

● Adhesives and sealants

EB1189 has many important applications, including:

● Component in sizing agents for glass fibers and electronic fabrics

● Additive for foundry resins such as phenolic, furan, and melamine resins

● Primer, additive, or chemical modifier for adhesives and sealants

● Pre-treatment agent for fillers and pigments in polymer systems containing inorganic fillers

● Primer or additive to enhance the adhesion of coatings or paints to substrates

Functions and Benefits:

The most significant performance improvements achieved by using EB1189 include:

● Enhanced flexural strength, tensile strength, impact resistance, and elastic modulus

● Improved water resistance and corrosion resistance

EB1189 N-(n-Butyl)-3-aminopropyltrimethoxysilane is a bifunctional silane containing both a reactive secondary amino group and hydrolyzable methoxy groups. Its dual reactivity enables EB1189 to chemically bond inorganic materials (e.g., glass, metals, fillers) with organic polymers (e.g., thermosets, thermoplastics, and elastomers), making it ideal as an adhesion promoter or surface modifier.

EB1189 appears as a colorless or slightly yellowish liquid with a slight ammonia-like odor, and is soluble in alcohols, aliphatic, and aromatic hydrocarbon solvents.

Functional Characteristics of EB1189 N-(n-Butyl)-3-aminopropyltrimethoxysilane:

1. In the presence of water, the methoxy groups of EB1189 hydrolyze to form reactive silanol groups that can bond with various inorganic materials. Meanwhile, the lipophilic n-butylamino functional group at the other end can react with suitable polymers. EB1189 hydrolyzes under acid-catalyzed conditions (e.g., acetic acid, pH 3). To dissolve EB1189 in organic solvents, add 2–4% water based on the amount of EB1189, and stir for 5 hours before use.

2. Suitable inorganic substrates include glass, glass fibers, glass mats, wollastonite, and kaolin. Resins compatible with EB1189 include epoxies, polyurethanes, PA, PBT, EVA, modified PP, silicones, and other organic systems.

3. Especially in thermoplastic applications, EB1189 is a highly effective coupling agent. When used to reinforce MAA-modified polyethylene, polypropylene, and polyamides, it delivers outstanding mechanical performance. EB1189 is particularly effective in improving the impact resistance of polyamides. Under demanding application conditions, glass fibers and fillers treated with EB1189 outperform those treated with conventional amino silanes. EB1189 can also be used as a chain terminator or end-capper for polyurethanes.

Packaging and Storage:

● Storage: Store in a well-ventilated, dry area. Keep containers tightly sealed to prevent moisture absorption. (Strictly avoid co-storage with acids, flammable materials, reducing agents, etc.)

● Packaging: Plastic drums, net weight: 25 kg / 190 kg.

Disclaimer:

All product information and technical recommendations provided herein are based on our current experience and level of knowledge. We do not assume any legal liability, including with regard to third-party intellectual property rights. No warranties or guarantees, either expressed or implied, are made regarding the properties of the product, especially in legal terms. We reserve the right to make changes to the product information due to technological advancements or further developments. Customers are responsible for conducting thorough testing and evaluation of the product. The product characteristics described in this document should be verified independently by customers through professional testing. Reference to brand names of other companies is for identification purposes only and does not imply recommendation or exclusion of similar available products.