18280827. PELLETIZATION OF A POLYMER STABILIZER MIXTURE simplified abstract (BASF SE)

PELLETIZATION OF A POLYMER STABILIZER MIXTURE

Organization Name

BASF SE

Inventor(s)

Thomas Georg Gfroerer of Kaisten (CH)

PELLETIZATION OF A POLYMER STABILIZER MIXTURE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18280827 titled 'PELLETIZATION OF A POLYMER STABILIZER MIXTURE

The invention described in the abstract is a method for manufacturing a pellet in a pellet mill, involving pressing a mixture for compaction through a nozzle to obtain a strand, and then comminuting the strand to obtain the pellet. The mixture for compaction includes a polymer stabilizer mixture and a processing aid.

• The method involves pressing a mixture for compaction through a nozzle and then comminuting the resulting strand to obtain a pellet.
• The mixture for compaction includes a polymer stabilizer mixture comprising specific polymer stabilizers and a processing aid that is a propylene-ethylene copolymer.
• The pellet is designed for dust-free handling of the polymer stabilizer mixture during the manufacturing of a stabilized polymer.
• The pellet can be dosed to a polymer, such as a polyolefin or polystyrene, to stabilize it.

Potential Applications: - Manufacturing of stabilized polymers - Polymer processing industries - Chemical manufacturing

Problems Solved: - Dust-free handling of polymer stabilizer mixtures - Efficient stabilization of polymers - Improved manufacturing processes

Benefits: - Enhanced polymer stabilization - Reduced dust generation during handling - Increased efficiency in polymer manufacturing

Commercial Applications: Title: Innovative Method for Manufacturing Polymer Stabilizer Pellets This technology can be utilized in polymer processing industries for the efficient and dust-free manufacturing of stabilized polymers. It has the potential to improve production processes and product quality in the chemical manufacturing sector.

Questions about the technology: 1. How does the method for manufacturing pellets in a pellet mill improve the handling of polymer stabilizer mixtures? 2. What are the specific benefits of using a propylene-ethylene copolymer as a processing aid in this method?

Original Abstract Submitted

The invention relates to a method for manufacturing a pellet in a pellet mill, which method comprises the steps of (A) pressing a mixture for compaction by a roller through a nozzle to obtain a strand, and (B) comminuting the strand to obtain the pellet, wherein the mixture for compaction comprises (i) 87 to 97 wt. % of a polymer stabilizer mixture polymer stabilizer mixture, which comprises the polymer stabilizers (i-1) 45 to 55 wt. % of tris(2,4-ditert-butylphenyl) phosphite (CAS-No. 31570-04-4), (i-2) 45 to 55 wt. % of tetrakis-[3-(3,5-ditert-butyl-4-hydroxy-phenyl)-propionyloxymethyl]methane (CAS-No. 6683-19-8), and wt. % of the polymer stabilizers (i-1) and (i-2) are based on the weight of the polymer stabilizer mixture, and (ii) 3 to 13 wt. % of a processing aid, which is a propylene-ethylene copolymer and which possesses a melting enthalpy below 20 J/g at 101.32 kPa. The pellet is useful for a dust-free handling of its polymer stabilizer mixture at a manufacturing of a stabilized polymer. Furthermore, a method for stabilizing a polymer, which is a polyolefin, a polystyrene or a mixture thereof, is disclosed, which comprises the dosing of the pellet to the polymer.