Abstract: A polymer latex is described for the preparation of an elastomeric film obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising: a) 15 to 99 wt.-% of conjugated dienes; b) 0 to 80 wt.-% of ethylenically unsaturated nitrile compounds; c) 0 to 70 wt.-% of vinyl aromatic monomers; the sum of ethylenically unsaturated nitrile compounds b) and vinyl aromatic monomers c) being 0.95 to 84.95 wt.-% d) 0.05 to 10 wt.-% of ethylenically unsaturated acids wherein the ethylenically unsaturated acids comprise d1) an ethylenically unsaturated acid comprising an acid functional group; and a spacer group separating the ethylenically unsaturated group and the acid functional group by at least 4 atoms; and e) 0 to 65 wt.-% of co-polymerizable ethylenically unsaturated compounds, wherein monomers a) to e) are as defined.

Abstract: An aqueous polymer latex composition is described for the preparation of an elastomeric film comprising: (I) particles of a latex polymer obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers, the particles bearing functional groups (a); and (II) a cross-linking component selected from monomeric compounds and oligomeric or polymeric compounds that are not prepared be free-radical addition polymerization, the cross-linking component comprising functional groups (b) and (c) that are different from each other, wherein functional group (b) forms upon reaction with functional group (a) a thermally reversible linkage selected from one or more of (i) a linkage having the structural formula wherein X, n, R1 and R2 are as defined; and (ii) a beta-hydroxy ester linkage; and functional groups (c) on different molecules of component (II) are capable of reacting with each other to provide elastomeric films having self-healing properties that can be repair

Abstract: The present invention relates to methods for reprocessing elastomeric films or articles comprising an elastomer film wherein the elastomeric film is made from a polymer latex comprising: (a) particles of a carboxylated conjugated diene nitrile latex polymer (a) obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising conjugated dienes; monomers selected from ethylenically unsaturated nitrile compounds; ethylenically unsaturated carboxylic acids and/or salts thereof; optionally vinyl aromatic monomers; and optionally alkyl esters of ethylenically unsaturated acids, in combination or association with (b) particles of a latex polymer (b) comprising at least one oxirane-functional group; wherein the monomer composition of the latex polymer (a) is different from the monomer composition of the latex polymer (b) and to the use of the polymer latex to make an elastomeric film obtained from the polymer latex self-healing, repairable and/or recyclable.

Abstract: The present invention relates to method for the production of a continuous elastomeric film and to continuous elastomeric films and elastomeric articles obtained thereby, where the method comprises: B) providing an aqueous polymer latex composition comprising: (I) particles of a latex polymer obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers, the particles bearing a plurality of functional groups, and (II) a crosslinking component comprising a plurality of functional groups at least one thereof being reactive with the functional groups on the latex polymer particles; B) forming from the aqueous polymer latex composition a continuous polymer film; C) optionally drying the continuous polymer film obtained in step B); D) curing the continuous polymer film obtained in step B) or C) to form a continuous elastomeric film; and E) optionally rolling the continuous elastomeric film obtained in step D) into a roll.

Abstract: The present invention relates to methods for reprocessing elastomeric films or articles comprising an elastomer film wherein the elastomeric film is made from a polymer latex comprising: (a) particles of a carboxylated conjugated diene nitrile latex polymer (a) obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising conjugated dienes; monomers selected from ethylenically unsaturated nitrile compounds; ethylenically unsaturated carboxylic acids and/or salts thereof; optionally vinyl aromatic monomers; and optionally alkyl esters of ethylenically unsaturated acids, in combination or association with (b) particles of a latex polymer (b) comprising at least one oxirane-functional group; wherein the monomer composition of the latex polymer (a) is different from the monomer composition of the latex polymer (b) and to the use of the polymer latex to make an elastomeric film obtained from the polymer latex self-healing, repairable and/or recyclable.

Abstract: The present invention relates to a polymer latex composition, to a method for the preparation of such polymer latex composition, to a compounded latex composition comprising said polymer latex composition, to the use of said polymer latex composition, to a method for making dip-molded articles, to a method for the production of a continuous elastomeric film and for making an elastomeric article, to a method for repairing or reforming an elastomeric film or an article and to articles made by using said polymer latex composition.

Abstract: The present invention relates to a polymer latex composition, to a method for the preparation of such a polymer latex composition, to the use of said polymer latex composition for the production of elastomeric articles, to a compounded latex composition comprising said polymer latex composition, to a method for making dip-molded articles, to a method for making elastomeric articles and to articles made by using said polymer latex composition.

Abstract: The present invention relates to method for the production of a continuous elastomeric film and to continuous elastomeric films and elastomeric articles obtained thereby, where the method comprises: B) providing an aqueous polymer latex composition comprising: (I) particles of a latex polymer obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers, the particles bearing a plurality of functional groups, and (II) a crosslinking component comprising a plurality of functional groups at least one thereof being reactive with the functional groups on the latex polymer particles; B) forming from the aqueous polymer latex composition a continuous polymer film; C) optionally drying the continuous polymer film obtained in step B); D) curing the continuous polymer film obtained in step B) or C) to form a continuous elastomeric film; and E) optionally rolling the continuous elastomeric film obtained in step D) into a roll.

Abstract: The present invention relates to a polymer latex for dip-molding applications obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising at least one conjugated diene and at least one ethylenically unsaturated nitrile compound in an aqueous medium in presence of seed latex particles having a glass transition temperature (mid point temperature Tmg) measured by DSC according to ASTM D3418-03 of ?50° C. to 50° C. wherein the seed latex particles do not contain structural units derived from ethylenically unsaturated nitrile compounds, to a method of preparing said polymer latex, to articles made by using said polymer latex and to a method for preparing dip-molded articles from said polymer latex.

Abstract: The present invention relates to a polymer latex comprising: (A) particles of a latex polymer (A) obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers the latex polymer comprising a plurality of functional groups (x); and (B) a compound bearing a beta-hydroxy ester linkage and at least one additional functional group (y) reactive with the functional groups (x) on latex polymer (A), to a method for preparation of said polymer latex, to its use, to a method for dip-molding and to articles obtained from the latex.

Abstract: A polymer latex is described for the preparation of an elastomeric film obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising: a) 15 to 99 wt.-% of conjugated dienes; b) 0 to 80 wt.-% of ethylenically unsaturated nitrile compounds; c) 0 to 70 wt.-% of vinyl aromatic monomers; the sum of ethylenically unsaturated nitrile compounds b) and vinyl aromatic monomers c) being 0.95 to 84.95 wt.-% d) 0.05 to 10 wt.-% of ethylenically unsaturated acids wherein the ethylenically unsaturated acids comprise d1) an ethylenically unsaturated acid comprising an acid functional group; and a spacer group separating the ethylenically unsaturated group and the acid functional group by at least 4 atoms; and e) 0 to 65 wt.-% of co-polymerizable ethylenically unsaturated compounds, wherein monomers a) to e) are as defined.

Abstract: An aqueous polymer latex composition is described for the preparation of an elastomeric film comprising: (I) particles of a latex polymer obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers, the particles bearing functional groups (a); and (II) a cross-linking component selected from monomeric compounds and oligomeric or polymeric compounds that are not prepared be free-radical addition polymerization, the cross-linking component comprising functional groups (b) and (c) that are different from each other, wherein functional group (b) forms upon reaction with functional group (a) a thermally reversible linkage selected from one or more of (i) a linkage having the structural formula ?wherein X, n, R1 and R2 are as defined; and (ii) a beta-hydroxy ester linkage; and functional groups (c) on different molecules of component (II) are capable of reacting with each other to provide elastomeric films having self-healing properties that can be repaired a

Abstract: The present invention relates to a polymer latex for dip-molding applications including: particles of a carboxylated conjugated diene nitrile latex polymer in combination or association with particles of a latex polymer including at least one oxirane-functional group, to the use of said polymer latex for the production of dip-molded articles or for coating or impregnating a substrate, to compounded compositions including said polymer latex, to a method for making dip-molded articles and to articles made by using said polymer latex.

Abstract: A curable polymer latex composition obtainable by: (a) subjecting a monomer mixture comprising i. at least one conjugated diene; ii. at least one ethylenically unsaturated nitrile; iii. optionally at least one ethylenically unsaturated acid; iv. optionally at least one further ethylenically unsaturated compound different from any of the compounds (i)-(iii); to free-radical emulsion polymerization in an aqueous reaction medium to form a raw polymer latex; and (b) allowing the obtained raw latex to mature in the presence of at least one thiocarbonyl-functional compound, wherein the at least one thiocarbonyl-functional compound is present in an amount of at least 0.05 wt.-%, based on the total amount of monomers subjected to free-radical emulsion polymerization in step (a), and (c) optionally compounding the matured polymer latex with one or more cross-linking agent. Methods for making such curable polymer latex composition or rubber articles made therefrom, respectively.

Abstract: A polymer latex composition for dip-molding applications includes the reaction product obtained by free-radical emulsion polymerization in aqueous medium of ethylenically unsaturated monomers including; (a) 19.9 to 90 wt.-% of at least one aliphatic conjugated diene; (b) 9.9 to 80 wt.-% of at least one unsaturated nitrile; (c) 0.1 to 10 wt.-% of at least one ethylenically unsaturated acid; (d) 0 to 19 wt.-% of at least one aromatic vinyl compound, and (e) 0 to 20 wt.-% of at least one further ethylenically unsaturated compound different from any of compounds (a) to (d), the weight percentages being based on the total amount of monomers, wherein the emulsion polymerization is conducted in presence of a degraded polysaccharide having a DE of 2 to 90 measured according to ISO 5377 (Dec.