Polypropylene CAS#9003-07-0
CAS Number: 9003-07-0
Chemical Formula: C22H42O3
Synonyms:
Polypropylene,film grade
Polypropylene master batch,flame retarding
POLYPROPYLENE, ISOTACTIC
Appearance: White to off-white Solid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Product Details
Polypropylene CAS#9003-07-0
Polypropylene is an atactic polymer that exists in both low-molecular-weight and high-molecular-weight grades, with distinct synthesis routes for each form:
Low-molecular-weight PP: Produced by passing propene gas over a phosphoric acid catalyst (supported on an inert carrier) at 200°C and moderate pressure. This reaction primarily generates propene trimers and tetramers, forming the low-molecular-weight polymer fraction.
High-molecular-weight PP: Synthesized by introducing propene into heptane (an inert solvent) containing a catalyst system of trialkylaluminum and a titanium compound. The resulting product is a blend of isotactic and atactic polypropylene, with isotactic PP accounting for the majority of the yield.
As a thermoplastic, polypropylene is widely utilized as a moulding material for various industrial and consumer applications.
Polypropylene Chemical Properties | ||
Melting point | 157 °C | |
Boiling point | 120-132 °C | |
density | 0.9 g/mL at 25 °C (lit.) | |
refractive index | n20/D 1.49(lit.) | |
Fp | >470 | |
storage temp. | -20°C | |
form | particles (Spherical) | |
color | red | |
Odor | odorless | |
biological source | human | |
Merck | 13,7663 | |
Dielectric constant | 1.5（Ambient） | |
IARC | 3 (Vol. 19, Sup 7) 1987 | |
NIST Chemistry Reference | Polypropylene, atactic(9003-07-0) | |
EPA Substance Registry System | Polypropylene (9003-07-0) | |
Safety Information
WGK Germany | 3 |
RTECS | UD1842000 |
TSCA | Yes |
HS Code | 39021000 |
Hazardous Substances Data | 9003-07-0(Hazardous Substances Data) |
Toxicity | LD50 intraperitoneal in rat: > 110gm/kg |
Product Application of Polypropylene CAS#9003-07-0
Polypropylene is an atactic polymer that is commercially supplied in two key grades differentiated by molecular weight, each produced via a dedicated synthetic pathway:
Low-molecular-weight polypropyleneThis grade is fabricated by subjecting propene gas to moderate pressure and a temperature of 200°C, with the gas passing over a phosphoric acid catalyst immobilized on an inert support matrix. The reaction selectively yields propene trimers and tetramers, which constitute the low-molecular-weight polymer fraction.
High-molecular-weight polypropyleneFor this grade, propene is introduced into heptane (an inert organic solvent) loaded with a binary catalyst system composed of trialkylaluminum and a titanium-containing compound. The resultant product is a heterogeneous blend of isotactic and atactic polypropylene, where isotactic PP dominates the composition as the primary component.
In terms of application, polypropylene’s thermoplastic properties make it a staple moulding material across industrial manufacturing and consumer goods production sectors.
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