The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2017
Filed:
Feb. 23, 2015
Applicant:
Akzo Nobel Chemicals International B.v., Arnhem, NL;
Inventors:
Assignee:
AKZO NOBEL CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 75/16 (2006.01); C08G 75/00 (2006.01); C08G 75/10 (2006.01); C08L 81/00 (2006.01); C08L 81/02 (2006.01);
U.S. Cl.
CPC ...
C08G 75/16 (2013.01); C08G 75/00 (2013.01); C08G 75/10 (2013.01); C08L 81/00 (2013.01); C08L 81/02 (2013.01);
Abstract
Process for the preparation of a mercapto-terminated liquid polymer comprising the steps of: a) reacting (para)formaldehyde with a halo-alcohol to form a reaction mixture comprising bis(2-dihaloalkyl)formal and b) reacting the reaction mixture of step a) with either (i) sodium polysulfide or (ii) a combination of sodium hydrosulfide and sulfur, wherein the process is performed in the presence of a branching agent selected from the group consisting of di-aldehydes and their corresponding actetals and hemi-acetals.