Qu-Ming Gu
Electrician in Bear, DE
License number
Delaware TH-0003893
Issued Date
Dec 7, 2007
Expiration Date
Dec 7, 2008
Category
Electrical Examiners
Type
Homeowner's Permit
Address
Address
2
Bear, DE 19701
Professional information
Diluents For Crosslinker-Containing Adhesive Compositions
US Patent:
2013022, Aug 29, 2013
Filed:
Feb 27, 2012
Appl. No.:
13/406119
Inventors:
Richard L. Brady - Wilmington DE, US
Qu-Ming Gu - Bear DE, US
Ronald R. Staib - Hockessin DE, US
Qu-Ming Gu - Bear DE, US
Ronald R. Staib - Hockessin DE, US
Assignee:
HERCULES INCORPORATED - Wilmington DE
International Classification:
B32B 21/00, B05D 3/02, B05D 3/00, C09D 163/00, B05D 7/06
US Classification:
428355CP, 523449, 427397
Abstract:
The disclosure relates to an adhesive composition for bonding lignocellulosic substrates. The adhesive composition contains a crosslinker and a non-urea diluent where the non-urea diluent is present in an amount from about 0.01 to about 75 weight % based on the total wet weight of the composition and where the crosslinker contains essentially no formaldehyde and contains no urea. Also disclosed is the adhesive further containing an aqueous mixture of a protein source. The disclosure also relates to a process for making lignocellulosic composites utilizing the disclosed adhesive composition and to the lignocellulosic composites made using the disclosed process.
Hydrophobically Modified Poly(Aminoamides)
US Patent:
8506757, Aug 13, 2013
Filed:
Nov 18, 2009
Appl. No.:
12/620962
Inventors:
Qu-Ming Gu - Bear DE, US
Lloyd A. Lobo - Lincoln University PA, US
Erin A. S. Doherty - Hockessin DE, US
Huai N. Cheng - Metairie CA, US
Lloyd A. Lobo - Lincoln University PA, US
Erin A. S. Doherty - Hockessin DE, US
Huai N. Cheng - Metairie CA, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
D21H 11/00
US Classification:
1621646
Abstract:
Disclosed herein are hydrophobically-modified poly(aminoamides) useful as fixative detackifiers for stickies and pitch control in papermaking processes. These polymers are prepared via modification of amine-containing water-soluble poly(aminoamides) with reactive functional group-containing hydrophobic compounds. In particular, poly(aminoamides) may be modified, under appropriate reaction conditions, with long chain alkyl glycidyl ether, AKD (alkyl ketene dimer), ASA (alkyl succinyl anhydride), or Quab (3-chloro-2-hydroxypropyl-N,N,N-dimethylalkyl ammonium chloride). These novel polymers are effective in inhibiting deposition of organic contaminants in pulp and papermaking systems.
Quaternary Vinylamine-Containing Polymers As Additives In Papermaking
US Patent:
8518215, Aug 27, 2013
Filed:
Jan 29, 2010
Appl. No.:
12/696237
Inventors:
Jonathan M. McKay - Wilmington DE, US
Qu-Ming Gu - Bear DE, US
Richard J. Riehle - Wilmington DE, US
Qu-Ming Gu - Bear DE, US
Richard J. Riehle - Wilmington DE, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
D21H 17/33, D21H 17/44, D21H 21/10, D21H 21/18, D21H 23/04
US Classification:
1621682, 162158, 1621641, 1621646, 1621681, 162185, 528422
Abstract:
Vinylamine-containing polymers are disclosed where the amine groups are substituted with cationic functional groups. Processes for preparing such polymers, as well as compositions comprising such polymers are also disclosed. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents.
Modified Vinylamine-Containing Polymers As Additives In Papermaking
US Patent:
8604134, Dec 10, 2013
Filed:
Jul 31, 2008
Appl. No.:
12/221220
Inventors:
Qu-Ming Gu - Bear DE, US
Jonathan M. McKay - Wilmington DE, US
Richard J. Riehle - Wilmington DE, US
Jonathan M. McKay - Wilmington DE, US
Richard J. Riehle - Wilmington DE, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C08F 8/44, C08F 226/02, C08F 226/06, D21H 17/34, D21H 17/45, D21H 23/04, C08F 8/02, C08F 8/10
US Classification:
5253284, 524 34, 525 542, 525 5426, 5253282, 5253591, 5253593, 5253594, 525385, 525386, 1621646
Abstract:
Vinylamine-containing polymers are disclosed where the amine groups are substituted with (1) cationic functional groups, (2) anionic functional groups, (3) hydrophobic functional groups, (4) hydrophilic functional groups, (5) functional groups that impart amphoteric characteristics to the polymers, or (6) combinations thereof. Also disclosed are processes for preparing such polymers, as well as compositions comprising such polymers. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents.
Process To Produce An Acylated Vinylamine-Containing Polymer And Its Application As A Papermaking Additive
US Patent:
8614279, Dec 24, 2013
Filed:
Apr 13, 2012
Appl. No.:
13/446486
Inventors:
Qu-Ming Gu - Bear DE, US
Jonathan M. McKay - Wilmington DE, US
Jonathan M. McKay - Wilmington DE, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C08F 120/54
US Classification:
5253282
Abstract:
A process for producing an acylated vinylamine-containing polymer is disclosed. The acylated vinylamine-containing polymer is produced by reacting a vinylamine-containing polymer with at least one acylating agent.
Michael Addition Adducts As Additives For Paper And Papermaking
US Patent:
7902312, Mar 8, 2011
Filed:
May 18, 2007
Appl. No.:
11/804360
Inventors:
Qu-Ming Gu - Bear DE, US
Ronald R. Staib - Hockessin DE, US
Ronald R. Staib - Hockessin DE, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C08F 26/02
US Classification:
526310, 526311
Abstract:
Several Michael addition adducts of vinylamines with α,β. -unsaturated alkyl carbonyl compounds including amides, esters and acids, particularly acrylamide are presented. Additionally, a process for producing these Michael addition adducts is described. These adducts are generally useful in the manufacture of paper and are particularly useful as dry strength additives to make paperboard products using a papermaking machine.
Diluents For Crosslinker-Containing Adhesive Compositions
US Patent:
8147968, Apr 3, 2012
Filed:
Oct 9, 2008
Appl. No.:
12/287394
Inventors:
Richard L. Brady - Wilmington DE, US
Qu-Ming Gu - Bear DE, US
Ronald R. Staib - Hockessin DE, US
Qu-Ming Gu - Bear DE, US
Ronald R. Staib - Hockessin DE, US
Assignee:
Hercules Incorportated - Wilmington DE
International Classification:
B32B 21/08, B32B 27/10, B32B 27/12, C08L 3/00, B05D 3/10
US Classification:
4284251, 4285371, 4285375, 428355 CP, 428355 N, 524 47, 427393
Abstract:
The disclosure relates to an adhesive composition for bonding lignocellulosic substrates. The adhesive composition contains a crosslinker and a non-urea diluent where the non-urea diluent is present in an amount from about 0. 01 to about 75 weight % based on the total wet weight of the composition and where the crosslinker contains essentially no formaldehyde. Also disclosed is the adhesive further containing. an aqueous mixture of a protein source. The disclosure also relates to a process for making lignocellulosic composites utilizing the disclosed adhesive composition and to the lignocellulosic composites made using the disclosed process.
Stable And Aqueous Compositions Of Polyvinylamines With Cationic Starch, And Utility For Papermaking
US Patent:
8444818, May 21, 2013
Filed:
Apr 7, 2011
Appl. No.:
13/081763
Inventors:
Frank J. Sutman - Wilmington DE, US
Christopher P. Dilkus - Woodlyne NJ, US
Qu-Ming Gu - Bear DE, US
Christopher P. Dilkus - Woodlyne NJ, US
Qu-Ming Gu - Bear DE, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
D21H 17/28, D21H 17/45, D21H 21/02, D21H 21/10, D21H 21/18, C08L 3/04
US Classification:
1621682, 162158, 1621641, 1621646, 1621681, 162175, 162185, 524 47
Abstract:
A stable aqueous composition comprising polyvinylamine and liquid cationic starch in a ratio of from 90 to 55 parts of polyvinylamine on active basis to 10 to 45 parts of liquid cationic starch on active basis is disclosed. The composition can be used in papermaking as a strength or as a drainage aid.
Hydrophobically Modifed Poly[Ethylene Glycol] For Use In Pitch And Stickies Control In Pulp And Papermaking Processes
US Patent:
8388806, Mar 5, 2013
Filed:
Jul 25, 2007
Appl. No.:
11/881128
Inventors:
Qu-Ming Gu - Bear DE, US
Huai N. Cheng - Avondale PA, US
William S. Carey - Wallingford PA, US
Robert A. Gelman - Newark DE, US
Erin A. S. Doherty - Hockessin DE, US
Huai N. Cheng - Avondale PA, US
William S. Carey - Wallingford PA, US
Robert A. Gelman - Newark DE, US
Erin A. S. Doherty - Hockessin DE, US
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
D21H 21/02
US Classification:
162158, 162 72, 162199
Abstract:
Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. Hydrophobically modified poly[ethylene glycol] are added to the pulp or applied to deposition-prone surfaces of a papermaking system.