Paper making and fiber liberation – Processes and products – Non-uniform – irregular or configured web or sheet
Reexamination Certificate
2005-05-19
2009-10-20
Halpern, Mark (Department: 1791)
Paper making and fiber liberation
Processes and products
Non-uniform, irregular or configured web or sheet
C162S112000, C162S113000, C162S168200, C156S183000, C264S283000
Reexamination Certificate
active
07604713
ABSTRACT:
The process for the production of crepe paper by adhesive bonding of a paper web with the aid of an adhesive comprising(i) polyethyleneimine having a molar mass Mwof from 50 000 to 2 million,(ii) reaction products of polyethyleneimine having a molar mass Mwof from 500 to 1 million with at least one C14- to C22-alkyldiketene, a monocarboxylic acid, an ester of a monocarboxylic acid or an acid chloride of a monocarboxylic acid and/or(iii) reaction products of polyalkylenepolyamines having a molar mass of from 300 to 1 million with at least one bischlorohydrogen ether or bisglycidyl ether of a polyalkylene glycol having a molecular weight MNof from 300 to 3000to a creping cylinder, compression and removal of the crepe paper, as well as the use of the adhesives (i) to (iii) as creping assistants.
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U.S. Appl. No. 11/718,158, filed Apr. 27, 2007, Esser, et al.
Esser Anton
Kannengiesser Detlef
Linhart Friedrich
BASF - Aktiengesellschaft
Halpern Mark
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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