David Castro

US Patent:

20140069600, Mar 13, 2014

Filed:

Sep 12, 2012

Appl. No.:

13/611450

Inventors:

Robert M. Lowe - Chicago IL, US
David J. Castro - DeKalb IL, US

International Classification:

C08L 77/00
D21H 23/00
D21H 17/55
C08K 5/1539

US Classification:

1621646, 524112, 524270

Abstract:

The invention is directed towards methods and compositions for improving the sizing of paper using PAE. Proper sizing of paper requires that a sizing agent adequately disperse so as to evenly distribute on the paper. Proper sizing also requires that the agent not cause runnability or chemical problems with other materials or equipment used in the papermaking process. PAE displays unexpected attributes that allow it to disperse sizing agents. Best of all it is not subject to the same overdose effect of typical emulsifiers such as cationic starch. As a result PAE is an excellent option for use in sizing paper.

US Patent:

20170328008, Nov 16, 2017

Filed:

May 15, 2017

Appl. No.:

15/594835

Inventors:

- St. Paul MN, US
Robert M. Lowe - Chicago IL, US
David Castro - DeKalb IL, US
Robert Anthony Melchiors - Milton GA, US
Mark A. Billings - Sobieski WI, US

Assignee:

Ecolab USA Inc. - St. Paul MN

International Classification:

D21H 21/20
C08F 220/56
B05D 1/02
C08F 2/02
D21H 21/18
D21H 21/10

Abstract:

Methods of reducing paper dusting in a papermaking process, and a low dusting tissue having increased strength are provided. Application of a polymer comprising at least one amine-containing vinylic or allylic monomer to at least one surface of a paper web during the papermaking process reduces the dusting tendency of the paper, and inpcreases both the wet and dry strength of the paper product.