1
Yanhui Sun: Polyester composition and process therefor. E I du Pont de Nemours and Comapny, December 18, 2001: US06331606 (37 worldwide citation)

A composition and a process for producing the composition are provided. The composition comprises repeat units derived from 1,3-propanediol; an organic acid, preferably a dicarboxylic acid, its salt, its ester, or combinations of two or more thereof; a polyether diol; and a sulfonated comonomer. The ...


2
Yanhui Sun: Cationic dyeability modifier for use with polyester and polyamide. E I du Pont de Nemours and Company, November 6, 2001: US06312805 (15 worldwide citation)

A cationic dyeability modifier for incorporation into polyesters and polyamides to increase their affinity for basic dyes, said cationic dyeability modifier having the following formula:


3
Yanhui Sun, Jun Zhao: Acid dyeable polyester compositions. E I du Pont de Nemours and Company, Mark D Kuller, June 10, 2003: US06576340 (12 worldwide citation)

An acid-dyeable polyester composition comprising (a) polyester and (b) secondary amine or secondary amine salt in an amount effective to promote acid-dyeability. The acid-dyeable polyester composition may be prepared by melt blending: the polyester; and polymeric additive prepared from (i) triamine ...


4
Yanhui Sun, David P Higley: Acid-dyeable polymer compositions. E I du Pont de Nemours and Company, Mark D Kuller, April 20, 2004: US06723799 (10 worldwide citation)

An acid-dyeable polymer composition comprising (a) polymer and (b) polymeric additive comprising repeating units having the formula:


5
Yanhui Sun, Jun Zhao: Polyamide compounds. Invista North America S รก r l, February 22, 2005: US06858702 (5 worldwide citation)

An acid-dyeable polyester composition comprising (a) polyester and (b) secondary amine or secondary amine salt in an amount effective to promote acid-dyeability. The acid-dyeable polyester composition may be prepared by melt blending: the polyester; and polymeric additive prepared from (i) triamine ...


6
Yanhui Sun: Process for increasing stain-resistance of cationic-dyeable modified polyamide fibers. E I du Pont de Nemours and Company, September 2, 1997: US05662716 (5 worldwide citation)

This invention relates to an improved process for dyeing cationic-dyeable polyamide fibers, especially carpet fibers, with an acid dye to provide stain-resistant fibers. The polyamide fibers contain cationically dyeable sulfonate groups along the polymer chain. The improvement involves adding certai ...


7
Yanhui Sun, Jun Zhao: Polyamide compounds. Invista North Americal S AR L, Charles E Krukiel, April 25, 2006: US07034088 (2 worldwide citation)

An acid-dyeable polyester composition comprising (a) polyester and (b) secondary amine or secondary amine salt in an amount effective to promote acid-dyeability. The acid-dyeable polyester composition may be prepared by melt blending: the polyester; and polymeric additive prepared from (i) triamine ...


8
Perry H Lin, Yanhui Sun: Method for preparing colored polyamide fibers which contain polycarbonates. E I Du Pont de Nemours and Company, March 12, 1996: US05498386 (1 worldwide citation)

This invention relates to an improved process for making colored polyamide fibers. The process involves adding about 0.1 to about 3.0 weight percent polycarbonate to a polyamide melt prior to extruding the melt through a spinneret to make colored fibers. The invention also encompasses the resultant ...


9
Yanhui Sun, Richard P Beatty: Hydrogenation and esterification to form diesters. Invista North America R L, December 25, 2012: US08338636

A process is disclosed which employs hydrogenation and esterification to form alkyl diesters. The process subjects an unrefined or otherwise not purified composition comprising maleic anhydride production residue to the processes of hydrogenation and esterification and forming diesters at high conve ...


10
Richard P Beatty, Carina Araullo McAdams, Yanhui Sun, Thomas A Micka: Aliphatic polyester polyols from cyclohexane oxidation byproduct streams as precursors for polyurethane and polyisocyanurate polymers. INVISTA North America r l, Ni Yan, June 16, 2015: US09056940

The invention provides polyester polyol compositions and resin blends, useful as components of polyurethane and polyisocyanurate polymers, produced from cyclohexane oxidation reaction byproducts, such as water extracts and non-volatile distillation residues from the reaction. Such byproducts of indu ...



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