National Starch and Chemical Investment Holding Corporation

National Starch and Chemical Corporation

Paul R Mudge

James L Walker

John C Leighton

Rama S Chandran

Pravin K Kukkala

Sirisoma Wanigatunga

Ronald Pangrazi

Carmine P Iovine

Howard G Katz

George Hespe

Robert L Billmers

John J Tsai

Patrick G Jobe

Yen-Jer Shih

Michael T Sarkis

David R Nass

David J Lunsford

John W Walker

Arthur B Pruiksma

Malcolm F Hallam

Josephine M Rosenski

Natalie Morawsky

James J Walker

Terence M Barnhart

A process for the preparation of emulsion polymers comprising 70 to 95% by weight of a vinyl ester and 5 to 30% by weight ethylene, the polymerization being carried out in the presence of 2 to 8% by weight of a protective colloid consisting of a blend of 1 to 3 percent by weight of 80% hydrolyzed polyvinyl alcohol, 0 to 2 percent by weight of 88% hydrolyzed polyvinyl alcohol and 1 to 3 percent by weight of 96% hydrolyzed polyvinyl alcohol, the blend having an average level of hydrolysis of 85 to 88%.

Ethylene-vinyl acetate emulsions with an improved balance of adhesive

A beater saturation process for forming a nonwoven wet laid composite is provided which comprises the following steps: (I) providing an aqueous dispersion comprising:

EVA polymers for use as beater saturants

The free formaldehyde content of the emulsion polymer, the amount of emitted formaldehyde and, even more particularly, of the finished nonwoven or textile may be substantially reduced by the use of a particular initiator system comprising a hydrophobic hydroperoxide and ascorbic acid. Moreover, this reduction in formaldehyde levels is accompanied by an unexpected improvement in the tensile properties of the emulsion binders.

Emulsion binders containing low residual formaldehyde and having

Hair fixative carboxylated polymers are stabilized in an aqueous emulsion by neutralization with a cosmetically acceptable organic or inorganic base, require no organic solvent, no propellant when dispensed in non-aerosol containers, and minimal organic propellant when dispensed in aerosol containers.

Emulsion polymers for use in hair fixatives

A woodworking adhesive composition prepared by a two stage emulsion polymerization procedure wherein the first stage comprises the step of emulsion polymerizing vinyl acetate with 0.1 to 6% by weight of a post-crosslinking monomer in the presence of polyvinyl alcohol to produce a polyvinyl alcohol stabilized copolymer having a Tg within the range of +10.degree. to +40.degree. C. and containing no pre-crosslinking monomers and the second stage comprises the step of emulsion polymerizing methyl methacrylate to produce a methyl methacrylate homo- or copolymer containing at least 75% by weight methyl methacrylate and having a Tg within the range of +50.degree. to +120.degree. C., further characterized in that the ratio of the polymer produced in the first stage to the polymer produced in the second stage is within the range of 10:1 to 10:6 and wherein the first stage polymer and second stage monomer mixture are not equilibrated prior to the second stage polymerization.

Woodworking adhesives based on multistage emulsion polymer

Water resistant emulsions for woodworking adhesives may be prepared using an emulsion polymer, the polymer being prepared in the presence of 1 to 2.5% by weight of 88% hydrolyzed polyvinyl alcohol and 1 to 4% by weight of 95-99.5% (or above) hydrolyzed polyvinyl alcohol.

Woodworking latex adhesives with improved water, heat and creep

Formaldehyde free crosslinking emulsion polymers are prepared by the addition of N-(2,2-dialkoxy-1-hydroxy)ethyl acrylamide to a vinyl ester based polymer. The resultant emulsions can be used as binders for nonwovens or fiberfill or as woodworking adhesives.

Woodworking adhesive composition containing vinyl acetate and

Various novel acetal- and aldehyde-containing monomers are prepared. They can be polymerized and copolymerized by conventional polymerization techniques. The polymers contain repeating units derived from one or more ethylenically or allylically unsaturated monomers containing an acetal group or aldehyde group and optionally one or more repeating units derived from ethylenically or allylically unsaturated monomers other than the acetal-containing or aldehyde-containing monomer such as ethylene, vinyl acetate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, methyl methacrylate or acrylic acid. Aqueous emulsions of polymers containing the acetal-containing monomers and a hydroxy-containing monomer are useful as binders for nonwoven fabrics.

Monomers and polymers containing acetal and aldehyde groups

Formaldehyde-free crosslinking emulsion polymer systems based on vinyl

A process for the emulsion polymerization of graft copolymers comprising the steps of: a) obtaining an unsaturated polymer containing terminal or pendant polymerizable functionalities; b) dissolving the resultant unsaturated polymer in an ethylenically unsaturated monomer in the presence of a surfactant in water to form an aqueous phase; c) microfluidizing the aqueous phase of (b) to a size of less than 0.5 u; and d) subsequently graft polymerizing a monomer with the unsaturated polymer in the microfluidized aqueous phase using free radical polymerization techniques; such that the graft polymerization reaction occurs within each micelle thereby resulting in uniform particles of the predetermined particle size.

Graft polymerization process using microfluidization in an aqueous

Latex caulk compositions comprising 30 to 80% filler and 20 to 70% by weight of an emulsion polymer prepared for the interpolymerization of 30 to 70 parts by weight of a vinyl ester of an alkanoic acid; 15 to 60 parts of an alkyl (C.sub.2 and C.sub.8) acrylate or dialkyl (C.sub.2 to C.sub.10) maleate; 10 to 30 parts ethylene; 1 to 5 parts olefinically unsaturated carboxylic acid; 0 to 5 parts polyolefinically unsaturated monomer and 0 to 8 parts of a copolymerizable functional monomer containing hydroxyl, amide or methylol substituents, (to total 100 parts by weight).

Ethylene vinyl acetate polymers for latex caulks

Emulsion binders which do not generate formaldehyde during cure are prepared for use in nonwoven products by using a emulsion copolymer comprising by weight about 100 parts C.sub.1 -C.sub.8 alkyl acrylate or C.sub.1 -C.sub.8 alkyl acrylates in combination with styrene, acrylonitrile, vinyl acetate and combinations thereof, about 1 to 20 parts hydroxyalkyl acrylate or methacrylate, about 2 to 20 parts meta or para isopropenyl-.alpha.,.alpha.-dimenthyl benyl isocyanate and optionally 0.1 to 5 parts of a multifunctional monomer. The binders are useful in the formation of heat resistant flexible products for use in roofing, flooring and filtering materials, as well as for facings and other applications in general purpose nonwoven products.

Formaldehyde-free nonwoven binder composition

Carpet coating compositions are disclosed which comprise 40 to 80 percent by weight filler and 20 to 60 percent by weight of a latex binder, the binder comprising an emulsion polymer of

Emulsion binder for carpet and carpet tiles

Adhesive compositions having a Tg of -45.degree. to -25.degree. C. suitable for application to plasticized polyvinuyl chloride comprising 25 to 40% by weight of a vinyl ester of a alkanoic acid; 10-30% by weight ethylene; 20 to 30% weight of di-2-ethylhexyl maleate or fumerate; 20 to 30% by weight of 2-ethylhexyl acrylate; and 1 to 10% by weight of a monocarboxylic acid.

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Belle Mead, NJ, United States of America

Paul R Mudge