Engelbert Ingrid K Pechhold

58340882, Nov 10, 1998

Sep 16, 1997

8/931137

Engelbert Pechhold - Chadds Ford PA

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

B32B 302

428 96

A polyamide fibrous substrate having deposited on it an amount of a composition effective to impart stain-resistance comprising a water-soluble or water-dispersible alpha-olefin/maleic anhydride polymer or a mixture of said polymers, and processes for preparing the substrates. The maleic anhydride polymer is used either in hydrolyzed form or in the form resulting from reacting it with a lower alkyl alcohol so as to form an alpha-olefin/maleic acid monalkyl ester polymer.

42516544, Feb 17, 1981

Aug 14, 1979

6/067352

Ivan M. Robinson - Wilmington DE
Engelbert Pechhold - Chadds Ford PA

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

C08G 6520
C08G 6530

528417

Tetrahydrofuran/alkylene oxide polymerizates containing no more than 3%, by weight, of oligomeric cyclic ethers are prepared by extracting the ethers from a raw polymerizate with water.

43407196, Jul 20, 1982

Aug 25, 1980

6/180878

Engelbert Pechhold - Chadds Ford PA

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

C08G 6534

528230

Oligomeric formal diols are prepared by coupling segments of PTMEG, each having a molecular weight of 1000-3000, with formaldehyde. The formal diols are useful in preparing polyurethanes.

53467264, Sep 13, 1994

Oct 15, 1992

7/962156

Engelbert Pechhold - Chadds Ford PA

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

D06M 1519

4273934

A polyamide fibrous substrate having deposited on it an amount of a composition effective to impart stain-resistance comprising a water-soluble or water-dispersible maleic anhydride/allyl ether or vinyl ether polymer or a mixture of said polymers, and processes for preparing the substates. The maleic anhydride polymer is used either in hydrolyzed form.

52604063, Nov 9, 1993

Apr 14, 1992

7/868323

Engelbert Pechhold - Chadds Ford PA

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

C08G 818
C08G 1404

528158

A stain-resist agent for polyamide fibers, its preparation and use are disclosed. The stain-resist agent is the condensation product of bis-hydroxyphenylsulfone with 0. 5 to 1. 0 mole of formaldehyde, per mole of bis-hydroxyphenylsulfone, and 0. 15 to 1. 5 moles of mercaptoacetic acid or mercaptosuccinic acid per mole of bis-hydroxyphenylsulfone and ammonium hydroxide or an alkali metal hydroxide in an amount sufficient to neutralize the mercapto acid plus an excess of about 0. 2 to 0. 6 mole of hydroxide per mole of bis-hydroxyphenylsulfone. Generally the reaction is carried out at 110. degree. to 180. degree. C. for 1 to 48 hours, with 130. degree. to 160. degree. C. for 3 to 24 hours being preferred. The product is applied to the polyamide fibers from an aqueous bath to provide a coating of 0. 5 to 5. 0 wt % stain-resist agent.

57706565, Jun 23, 1998

Sep 22, 1995

8/532346

Engelbert Pechhold - Chadds Ford PA

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

C08F 818

5253264

A composition of partial esters or thioesters formed from copolymers of maleic anhydride and perfluoroalkyl alcohols or perfluoroalkyl thiols is disclosed, and a process for providing soil and stain resistance to fibers by application of such partial esters or thioesters.

58243720, Oct 20, 1998

Sep 25, 1997

8/937953

Engelbert Pechhold - Chadds Ford PA

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

B32B 2702

4273935

A copolymer having units of Formula II: ##STR1## wherein M is H, alkali metal, anmonium cation, or a mixture thereof; N is OM or a mixture of OM, OR, and NR. sub. 1 R. sub. 2 in a molar ratio of (OM):(OR):(NR. sub. 1 R. sub. 2) of �1-(e+f)!:e:f, wherein e and f are each independently 0 to 0. 5, provided that (e+f) is less than 0. 8; R, R. sub. 1, and R. sub. 2 are each independently H or a branched or straight chain C. sub. 1-20 alkyl; Y is a C. sub. 2-10 alkyl, C. sub. 6-12 aryl, or C. sub. 4-12 alkoxy; X is a fluorinated thiol radical; Z is H; and v and w are each a positive number such that the molar ratio of v to w is from about 0. 4:1 to about 1. 3:1 is disclosed.

43831001, May 10, 1983

Jan 19, 1982

6/340828

Engelbert Pechhold - Chadds Ford PA

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

C08G 1848
C07C 4230

528 76

Oligomeric formal diols are prepared by coupling segments of copolyether glycols with formaldehyde. The formal diols are useful in preparing polyurethanes.