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Patents with Abstracts

Process for preparing an aqueous polymer composition using water-soluble free radical chain regulators
Elizalde and Gerst of BASF, Germany, Process for preparing an aqueous polymeric coupling agent using water-soluble free radical chain regulators.  This is based on free radically initiated emulsion polymerization of a monomer mixture M composed of i) 0.01 to 10 wt% of an ethylenically unsaturated monomer M1 which comprises at least one epoxide group and/or at least one hydroxyalkyl group, and ii) from 90 to 99.99 wt% of an ethylenically unsaturated monomer M2 which differs from the monomers M1, in an aqueous medium in the presence of a polymer A, the polymer A being composed of a) 80 to 100 wt% of ethylenically unsaturated mono- and/or dicarboxylic acid [monomers A1] and b) 0 to 20 wt% ethylenically unsaturated monomer which differs from the monomers A1 [monomers A2], incorporated in the form of polymerized units, and the ratio of the total amount of the monomer mixture M (total monomer amount M) to the total amount of the polymer A being from 1:99 to 99:1, wherein the polymer A has been prepared in an aqueous medium by free radically initiated polymerization of the monomers A1 and A2 in the presence of a sulfur-, nitrogen-, and/or phosphorus-containing free radical chain regulator which at C. and 1 atm (=1.013 bar absolute) in demineralized water has a solubility of .gtoreq.5 g/100 g of water.  This mixture is used as a binder in the production of adhesives, sealants, shaped articles made from fibrous or particulate substrates, polymeric renders, paper coating compositions, and paints, and for impregnating base papers, and also for modifying mineral binders or plastics. (RDC 6/27/2012)

Method for the treatment of substrates
Siemensmeyer et al of BASF, Germany, developed aqueous binder containing formulations, where R1 is selected from C1-C20-alkyl, straight chain or branched, or CO--C1-C19-alkyl or CO--C2-C19-alkenyl, straight chain or branched, R2 in each occurrence is the same or different and selected from C1-C3-alkyl, R3 is selected from C1-C20-alkyl, straight chain or branched, or CO--C1-C19-alkyl or CO--C2-C19-alkenyl, straight chain or branched, x is from 0 to 20, y is from 0 to 20, provided x and y are not both zero, a is from 1 to 3. (RDC 6/27/2012)

Modified binders for making fiberglass products
Tutin, Hines and Wertz of Georgia-Pacific Chemicals, Georgia, developed coupling agent for fiberglass.  This includes a phenol-aldehyde resin or a mixture of Maillard reactants and one or more modifiers selected from the group consisting of a copolymer comprising one or more vinyl aromatic derived units and at least one of maleic anhydride and maleic acid; an adduct of styrene, at least one of maleic anhydride and maleic acid, and at least one of an acrylic acid and an acrylate; and one or more latexes. (RDC 6/26/2012)

Process for binding fibrous materials and resulting product
Shooshtari and Asrar of Johns Manvilled, Colorado, developed a non-phenol-formaldehyde binder for fiber glass.  It is based on free-radical polymerization and esterification crosslinking reaction.  The intermediate reaction product is formed by the reaction of (i) at least one anhydride having at least one unsaturated double bond capable of undergoing free-radical polymerization, and (ii) at least one polyol crosslinker.  When applied to a fibrous material, the binding composition comprising the intermediate reaction product is cured in the presence of a free-radical initiator and a polyol crosslinker wherein the double bonds present in the intermediate reaction product undergo free-radical polymerization and hydroxyl and carboxylic acid end groups undergo crosslinking to form a cured binder. In a preferred embodiment the securely bound fibrous product is fiberglass building insulation that well withstands water even at elevated temperatures. (RDC 6/26/2012)

Crosslinkable cationic emulsion binders and their use as a binder for nonwovens
Parson, Walker and Barcomb of Celanese, Texas, developed a cationic polymer emulsion binder that may be combined with a cationic active ingredient and used as a non-woven binder. This combination of cationic binder and cationic active ingredient may occur as a mixture of a cationic binder and at least one cationic active ingredient, which is then applied to loose fibers to form a non-woven; or the combination may occur after a non-woven is formed using a cationic binder, and said non-woven is then contacted with a cationic active ingredient. Non-woven wipes of the invention retain far less cationic active ingredients during use, resulting in less waste and less use of the active ingredients for the same effect as wipes made with anionic or non-ionic binders. (RDC 6/26/2012)

Poly (vinyl alcohol)--based formaldehyde-free curable aqueous composition
Pisanova, Schmidt and Tseitlin of Dynea Oy, Finland, developed a formaldehyde-free curable aqueous composition containing polyvinyl alcohol, a multi-functional crosslinking agent, and, optionally, a catalyst.  The composition may be used as a binder for non-woven products such as fiberglass insulation. The non-woven products are formed by contacting the formaldehyde-free curable aqueous composition with fibrous components and the mixture is cured to form a rigid thermoset polymer providing excellent strength and water resistance of the cured nonwoven product. (RDC 5/3/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

** Date of latest addition; date of first entry is 5/3/2012.