Creping adhesives made from amine-terminated polyamidoamines

Details Creping adhesives made from amine-terminated polyamidoamines Creping adhesives made from amine-terminated polyamidoamines

2011-05-17

2011-05-17

Woodward, Ana L (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C162S164300, C525S420000

Reexamination Certificate

active

07943705

ABSTRACT:
Polyamidoamine (PAE) resins are prepared from polyamidoamine made with excess amine, which are reacted with a specifically defined amount of difunctional crosslinker. The amount of difunctional crosslinker used is based on the polyamidoamine amine number and reduced specific viscosity (RSV). The PAE resin is prepared by first synthesizing a polyamidoamine from a polyamine and a polycarboxylic acid or polycarboxylic acid derivative, wherein the polyamine is present in a molar excess, said molar excess being from about 1.02 to 2.00, then reacting the polyamidoamine with difunctional crosslinker, wherein the weight % of difunctional crosslinker to polyamidoamine solids is no more than about 0.308(amine number/RSV)—9.18 or 385(amine number/RSV)—5.20, wherein the amine number is expressed as the milliequivalents of amine per gram of polyamidoamine solids and the RSV is the reduced specific viscosity measured at 2% concentration in 1M NH4Cl expressed in deciliters per gram. PAE resins prepared according to this process can by used in creping adhesives, which are used to manufacture a variety of paper articles, such as facial tissue, bath tissue, wipes, paper towels, paper napkins, filter papers, and coffee filters.

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