Disclosed are compositions comprising a liquid carrier, a polysulfide rubber curing agent, a metal cation, and an ionic liquid. Also disclosed are methods for curing a surface of an uncured polysulfide rubber. These methods involve applying the disclosed compositions to the surface of the uncured polysulfide rubber.

A rubber composition based at least on a reinforcing filler comprising a carbon black and on a natural rubber is provided. The natural rubber is modified so that it carries pendent groups of formula (I) in which the symbols Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4, which may be identical or different, represent an atom or a group of atoms. At least one of the symbols Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 denotes an attachment to an isoprene unit of the modified natural rubber. The carbon black represents more than 50% by weight of the reinforcing filler

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A rubber composition based at least on a reinforcing filler comprising a carbon black and on a natural rubber is provided. The natural rubber is modified so that it carries pendent groups of formula (I) in which the symbols Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4, which may be identical or different, represent an atom or a group of atoms. At least one of the symbols Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 denotes an attachment to an isoprene unit of the modified natural rubber. The carbon black represents more than 50% by weight of the reinforcing filler

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Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, a dip-molded article having slow syneresis, less stickiness and superior tensile strength is produce by dip-molding of a carbonic acid-modified nitrile-based copolymer latex having increased molecular stability due to the combined use of alkenylsuccinate, which is an emulsifier crosslinkable with the latex and having a flexible molecular structure.

Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, a dip-molded article having slow syneresis, less stickiness and superior tensile strength is produce by dip-molding of a carbonic acid-modified nitrile-based copolymer latex having increased molecular stability due to the combined use of alkenylsuccinate, which is an emulsifier crosslinkable with the latex and having a flexible molecular structure.

A flame retardant composition and a method of making a flame retardant composition is provided. In an embodiment, the method includes reacting a phosphazene material with an acrylamide monomer material to form a functionalized phosphazene material; initiating a polymerization reaction on a reaction mixture comprising a functionalized phosphazene material and one or more monomers to form a first impact-modified phosphazene material; and reacting the first impact-modified phosphazene material with a poly(dichlorophosphazene) monomer material, and a reactant selected from the group consisting of R.sup.1OH, HNR.sup.2R.sup.3, or a combination thereof, to form a second impact-modified phosphazene material.

A flame retardant composition and a method of making a flame retardant composition is provided. In an embodiment, the method includes reacting a phosphazene material with an acrylamide monomer material to form a functionalized phosphazene material; initiating a polymerization reaction on a reaction mixture comprising a functionalized phosphazene material and one or more monomers to form a first impact-modified phosphazene material; and reacting the first impact-modified phosphazene material with a poly(dichlorophosphazene) monomer material, and a reactant selected from the group consisting of R.sup.1OH, HNR.sup.2R.sup.3, or a combination thereof, to form a second impact-modified phosphazene material.

A modified liquid diene rubber (A) has a functional group (a) derived from an acid anhydride, and satisfies all the requirements (I) to (III) below: (I) The functional group equivalent weight of the functional groups (a) is in the range of 400 to 3,500 g/eq. (II) The polystyrene-equivalent number average molecular weight (Mn) measured by gel permeation chromatography (GPC) is in the range of 5,000 to 20,000. (III) The melt viscosity at 38 C. is not less than 3 Pa.Math.s and X (K) is not less than 6100 K wherein X is the slope of a linear line passing through two points in a graph in which the two points are values of melt viscosity (Pa.Math.s) at 38 C. and 60 C. measured with a Brookfield viscometer which are plotted as Ln[/(Pa.Math.s)] on ordinate versus 1/T (K.sup.1) on abscissa (with the proviso that T is temperature (K)).

A modified liquid diene rubber (A) has a functional group (a) derived from an acid anhydride, and satisfies all the requirements (I) to (III) below: (I) The functional group equivalent weight of the functional groups (a) is in the range of 400 to 3,500 g/eq. (II) The polystyrene-equivalent number average molecular weight (Mn) measured by gel permeation chromatography (GPC) is in the range of 5,000 to 20,000. (III) The melt viscosity at 38 C. is not less than 3 Pa.Math.s and X (K) is not less than 6100 K wherein X is the slope of a linear line passing through two points in a graph in which the two points are values of melt viscosity (Pa.Math.s) at 38 C. and 60 C. measured with a Brookfield viscometer which are plotted as Ln[/(Pa.Math.s)] on ordinate versus 1/T (K.sup.1) on abscissa (with the proviso that T is temperature (K)).

1) Hydrocarbon-based copolymer comprising two end groups preceded by an ester function and chosen from a 2-oxo-1,3-dioxolan-4-yl (or cyclocarbonate), a dithiocyclocarbonate, an exo-vinylene cyclocarbonate and a 2-oxo-1,3-dioxolen-4-yl, the main chain of which comprises units (I) and (II)

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in which R.sup.0 is notably a methyl radical;

and the number-average molecular mass Mn of which is between 400 and 100 000 g/mol.

2) Process for preparing said copolymer, comprising:

(i) a step of heating a statistical bipolymer A chosen from a poly(butadiene-isoprene), a poly(butadiene-myrcene) and a poly(butadiene-farnesene); and then

(ii) a step of heating the product formed, in the presence of a chain-transfer agent.

3) Use as adhesive, as a mixture with an amine compound comprising at least two amine groups.