1,3-Bis(3-aminopropyl)tetramethyldisiloxane

CAS NO.：2469-55-8
Empirical Formula: C10H28N2OSi2
Molecular Weight: 248.51
MDL number: MFCD00039786
EINECS: 219-588-7
SAFETY DATA SHEET (SDS)
Update Date: 2024-11-05 11:59:05

What is 1,3-Bis(3-aminopropyl)tetramethyldisiloxane?

Chemical properties

Clear colorless to pale yellow liquid

The Uses of 1,3-Bis(3-aminopropyl)tetramethyldisiloxane

1,3-Bis(3-aminopropyl)tetramethyldisiloxane is an endcapper for the synthesis of aminopropyl-terminated silicone fluids and for the production of silicone-epoxy and silicone polyimide copolymers especially useful in electronics applications. A unique manufacturing process insures that It has only gamma - aminopropyl substitution and none of the beta isomer. This is expected to give better reactivity in copolymer synthesis and improved heat stability.
1,3-Bis(3-aminopropyl)tetramethyldisiloxane is an alkaline material due to its amine reactive groups. Care should be exercised in handling it to prevent contact with skin and eyes. Wear safety glasses with side shields and rubber gloves when handling.

The Uses of 1,3-Bis(3-aminopropyl)tetramethyldisiloxane

1,3-Bis(aminopropyl)tetramethyldisiloxane is used as a curing agent for epoxy molding compounds, which is utilized for high-reliability semiconductor devices. It is also used to prepare siloxane- urea copymers from 4,4?-diphenylmethane diisocyanate.

Production Methods

A glass flask with a stirrer, reflux condenser, thermometer, and dropping funnel was charged with N, N-bis(trimethylsilyl)allylamine. A 4% isopropyl alcohol solution of H2 PtCl6.6H2 O. From the funnel, dimethyl ethoxy silane was added dropwise to the flask at 70° C. over 3 hours for hydrosilylation reaction. The reaction solution was ripened for one hour at the temperature. After adding ethanol and dodecylbenzenesulfonic acidd, the reaction solution was refluxed for 6 hours, completing the desilylation reaction. The reaction solution was transferred to a distillation apparatus where the ethanol and trimethyl ethoxy silane were distilled under atmospheric pressure. Water was added to the remainder, which was refluxed for 2 hours. Vacuum distillation was then carried out to collect 1,3-Bis(3-aminopropyl)tetramethyldisiloxane.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by intraperitoneal route. When heated to decomposition it emits toxic vapors of NOx.

Properties of 1,3-Bis(3-aminopropyl)tetramethyldisiloxane

Boiling point:	132 °C11 mm Hg(lit.)
Density	0.901 g/mL at 20 °C(lit.)
vapor pressure	0.27Pa at 20℃
refractive index	n20/D 1.451
Flash point:	91°C
storage temp.	Inert atmosphere,2-8°C
form	clear liquid
pka	10.96±0.10(Predicted)
Specific Gravity	0.897
color	Colorless to Light yellow to Light orange
Water Solubility	Slightly soluble in water.
Sensitive	Air Sensitive
Hydrolytic Sensitivity	4: no reaction with water under neutral conditions
BRN	1760876
CAS DataBase Reference	2469-55-8(CAS DataBase Reference)
EPA Substance Registry System	1-Propanamine, 3,3'-(1,1,3,3-tetramethyl-1,3-disiloxanediyl)bis- (2469-55-8)

Safety information for 1,3-Bis(3-aminopropyl)tetramethyldisiloxane

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05
GHS Hazard Statements	H227:Flammable liquids H314:Skin corrosion/irritation
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P260:Do not breathe dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P370+P378:In case of fire: Use … for extinction. P405:Store locked up. P403+P235:Store in a well-ventilated place. Keep cool. P501:Dispose of contents/container to..…