Robert R Reitz

US Patent:

20080039540, Feb 14, 2008

Filed:

Dec 11, 2006

Appl. No.:

11/637210

Inventors:

Robert Reitz - West Chester PA, US

International Classification:

C08J 11/24

US Classification:

521048500

Abstract:

The present invention is directed towards a process for the recycling of polyesters comprising the steps of blending a starting polymer that is to be recycoled with an alkylene diol to form a blend, melting the blend and holding the melt blend under conditions of a first residence time, first temperature and shear to produce a cracked polymer. The cracked polymer blend can then be filtered, cooled and held under conditions such that solid phase polymerization takes place until a desired molecular weight is achieved.

US Patent:

48491357, Jul 18, 1989

Filed:

Jun 2, 1986

Appl. No.:

6/872662

Inventors:

Robert R. Reitz - West Chester PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C09K 2100
H01B 700
C09D 516
C09D 518

US Classification:

252606

Abstract:

The addition of certain phosphate esters causes ethylene copolymers containing CaCO. sub. 3 and/or Ca-Mg/CO. sub. 3 and alumina trihydrate to have lower swell on burning and to have smaller and more uniform cell formation in the ceramic ash than compositions without such esters present.

US Patent:

46786074, Jul 7, 1987

Filed:

Jul 25, 1986

Appl. No.:

6/889470

Inventors:

Robert R. Reitz - West Chester PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C09K 2102
C09K 2110
C09D 518

US Classification:

252609

Abstract:

The addition of melamine/formaldehyde resins causes ethylene copolymers containing CaCO. sub. 3 and alumina trihydrate to have lower swell on burning and has smaller and more uniform cell formation in the ceramic ash than compositions without such resins present.