Rohm and Haas Company

Other

Charles Thomas Arkens

Robert David Gleim

Scott Lind Egolf

Oscar Hsien-Hsiang Hsu

Reginald T Smart

Kenneth John Wiesinger

Charles E Cluthe

Johnny Chung Nin U

This invention relates to a method for strengthening a cellulosic substrate by treating the substrate with a formaldehyde-free curable aqueous composition and curing the composition. The cellulosic substrates include, for example, paper oil- and air-filter stock, rayon nonwoven wipes, cellulosic laminating stock, cotton woven fabrics, and wood flakes suitable to be consolidated into flakeboard.

Method for strengthening cellulosic substrates, cellulosic nonwoven wipes, and paper filter stock

This invention relates to a formaldehyde-free curable aqueous composition containing a polyacid, a polyol and a phosphorous-containing accelerator. The composition may be used as a binder for heat resistant nonwovens such as nonwovens composed of fiberglass.

Curable aqueous composition and use as fiberglass nonwoven binder

Curable aqueous composition

A formaldehyde-free curable aqueous composition comprising:

Formaldehyde-free, accelerated cure, aqueous composition for bonding

A formaldehyde-free curable composition useful for binding nonwovens comprises

Formaldhyde-free compositions for nonwovens

Curable aqueous composition and use as fiberglass non woven binder

Method for strengthening cellulosic substrates, celluosic non woven

Method for strengthening cellulosic substrates

This invention relates to improved textile fibers having deposited thereon a coagulable, multi-stage, latex binder. In addition, this invention relates to a method for improving the stiffness of textile materials by depositing thereon an acid-resistant, coagulable, multi-stage, latex binder wherein one stage enhances the stiffness of the textile fibers and another stage controls the coagulation temperature of the latex binder. The latex binder is particularly suitable for use in battery separators.

Battery separator with fiber binder

Fiber binder

A method for making a heat resistant nonwoven fabric is provided. A formaldehyde-free binder composition containing a carboxy group, or a carboxylic anhydride, or salts of a carboxy group; and a .beta.-hydroxyalkyl amide contacts a nonwoven fabric containing heat-resistant fibers, and heating the binder composition is effected.

Heat-resistant nonwoven fabrics

Tear resistance and flexibility of resin-treated textiles are improved while retaining good low temperature properties by using as the resin an acrylic emulsion polymer wherein the latex particles have a core-shell structure. The monomers forming the core are selected to provide a Tg in the core of -20.degree. C. or lower and the monomer composition forming the shell is selected to provide a Tg in the shell of about 60.degree. C. to about -10.degree. C. The core monomer composition contains 4-10 wt. % of a latent crosslinker together with 0-0.03 wt. % of an active crosslinker or a graftlinker, and the shell monomer composition contains 2-10 wt. % of a latent crosslinker.

Heteropolymer acrylic latices and textiles treated therewith

There is disclosed a calenderable, soft, three-stage acrylic heteropolymer having a calculated T.sub.g of about (-) 40.degree. to (=) 20.degree. C. which is suitable for producing films and sheets useful to coat textile materials and other substrates to form composites. The heteropolymer can be coagulated and then introduced into a calendering apparatus to produce films and sheets at substantially lower temperatures than are required for calendering vinyl halide polymers.

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Hatfield, PA, United States of America

Charles Thomas Arkens