Purified styrene-maleic anhydride polymer binder

Details Purified styrene-maleic anhydride polymer binder Purified styrene-maleic anhydride polymer binder

2008-01-15

2010-11-02

Boykin, Terressa M (Department: 1796)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C252S008840, C427S385500, C427S389800, C526S318300

Reexamination Certificate

active

07825214

ABSTRACT:
An aqueous binding composition is provided comprised of a polyanhydride based polymer, which polyanhydride based polymer has been purified through the use of an azeotrope. The resulting binder is effective, particularly for binding glass fibers, yet substantially odor free. A fibrous material is provided that is coated with a water-resistant cured binder formed in accordance with the process of the present invention wherein adjoining fibers are bound at cross-over points. Such bound fibrous material is free of a phenol-formaldehyde resin and substantially free of odor. It has been found that by removing purities such as cumene and acetophenone from a polyanhydride binder, e.g., a styrene maleic anhydride based polymer based binder, an effective binder for glass fiber is obtained while also avoiding an odor problem.

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Formaldehyde-Free Crosslinking Binders for Nonwovens, Charles T. Arkens et al., Tappi Journal, vol. 78, No. 11, pp. 161-168, Nov. 1995.

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