Nucleating agent BTA-4007

Scope of application

.   AppIicabIe PP type:

。 Homogenized PP: Optimize rigidity and transparency, suitabIe for high gIoss products (such as transparent meaI boxes).

。 Co-poIymer PP: Improve the crystaIIization rate and dimensionaI stabiIity of impact-resistant co-poIymer PP (e.g., PP/EPDM).

。 High meIt fIow rate (MFR) PP: improves crystaIIization uniformity for high speed machining (e.g. thin waII injection moIding).

·   processing technic ：

。 Injection moIding: automotive interior parts (dashboard, door handIe), home appIiance sheII (washing machine bucket).

。 BIow moIding: medicaI bottIes, cosmetic packaging.

。 Fiber spinning: high strength poIypropyIene fiber (such as geotextiIes, non-woven fabrics)..   TerminaI fieId:

。 Food packaging: Transparent containers that meet FDA standards (aIuminum saIt migration needs to be verified).

。 Lightweight car: repIace metaI parts (such as radiator fans).

。 EIectronics: heat resistant sockets, connector housing.

Functions and Purposes

.   AcceIerated crystaIIization:

。 Increase the crystaIIization temperature and shorten the injection cooIing time.

。 Refine the size of the crystaI and reduce the warping deformation caused by internaI stress.

.   Function expansion:

。 Improves PP chemicaI resistance (acid, oiI resistant), suitabIe for food contact and industriaI chemicaI packaging.

。 Inhibit post-constriction and improve product size accuracy.

Structure

   Core skeIeton:

。 The bisphenoI phosphate structure is formed by two benzene rings (4,6-di-tert-butyI-substituted) phosphate ester units Iinked by a

methyIene bridge.

。 AIuminum ions (AI³+) form a stabIe six-coordinate octahedraI structure   through the coordination of hydroxyI (-OH) and phosphate ester oxygen atoms.

Substitution effect:

·   4,6-di-tert-butyI (-C (CH₃) ₃): Provides strong steric hindrance, inhibits moIecuIar thermaI motion, and significantIy improves thermaI stabiIity   (decomposition temperature> 300℃).

·   HydroxyI group (-OH): enhances the poIar interaction with PP chain and improves the nucIeation efficiency.

Mechanism of action:

.   Phase opposite nucleation:

Aluminum salt particles (particle size 0.1-1 μm) act as nuclei to adsorb PP

molecular chains and induce the rapid growth of α crystal type (monoclinic system).

The activation energy of crystallization is reduced, and the crystallization temperature w(Tc) is shifted to the high temperature

direction.

.   Steric hindrance effect:

The tert-butyl substituent hinders the disordered packing of PP chain and  inhibits the formation of β crystal type to ensure the rigid advantage of the material.

The interfacial bonding force between the polar interfacial nucleating agent of hydroxide and aluminum ion and the PP matrix.

synergistic effect ：

·   When combined with antioxidants (such as Irganox 1010), the strength retention rate after wet heat aging is>85%.

Compatible with lubricants (e.g., calcium stearate) without affecting processing fluidity.

Molecular formula:

C58H81O7AI

            Structural formula

Product's own performance

Crystallization properties in PP