Patent · US Expired

Process for making-up polyamide resins solid at room temperature

US6232436A · kind A · utility

5Cited by

5References

12Claims

0Family size

Assignee

Cognis Deutschland GmbH · DE

Inventors

Wilhelm Beck · Goldkronach, DE
Bernhard Leibmann · Hilden, DE
Aike Niemann · Monheim, DE
John D. Snyder · Pittsburgh, US
Kenneth R. Bicknell · Bourbonnais, US
Michael Mahler · Crete, US

Key dates

Filing date	Sep 15, 1999
Grant date	May 15, 2001
Priority date	—
Expiry date	Sep 15, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2077/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process for granulating a polyamide resin involving: (a) providing an underwater granulating device having a heated multiple-bore die wherein the bores have an internal diameter ranging from 1.2 to 2.5 mm and a length of from 12 to 50 mm; (b) providing a polyamide resin melt having a viscosity, at 160.degree. C., of less than 3,000 mPas; (c) cooling the polyamide resin melt to form a cooled polyamide resin; (d) introducing the cooled polyamide resin into and through the heated multiple-bore die to form an extrudate; (e) providing a source of water; (f) contacting the extrudate with the water to form a cooled extrudate; and (g) cutting the cooled extrudate into granules.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.