A nitrile group-containing copolymer rubber including 10 to 60 wt % of an α,β-ethylenically unsaturated nitrile monomer unit a nd 1 to 60 wt % of an α,β-ethylenically unsaturated dicarboxylic a cid monoester monomer unit, and having an iodine value of 120 or 1 ess, wherein a processability index Ipro (Ipro=CC×SA) is 0.003 0 or less, where the processability index Ipro is the product of the carboxyl group content CC, which is the number of moles of carboxyl groups per 100 g of nitrile group-containing copolymer rubber, and the absorbance area SA of a carboxylic anhydride group determined by infrared spectroscopy.

A nitrile group-containing copolymer rubber including 10 to 60 wt % of an α,β-ethylenically unsaturated nitrile monomer unit a nd 1 to 60 wt % of an α,β-ethylenically unsaturated dicarboxylic a cid monoester monomer unit, and having an iodine value of 120 or 1 ess, wherein a processability index Ipro (Ipro=CC×SA) is 0.003 0 or less, where the processability index Ipro is the product of the carboxyl group content CC, which is the number of moles of carboxyl groups per 100 g of nitrile group-containing copolymer rubber, and the absorbance area SA of a carboxylic anhydride group determined by infrared spectroscopy.

The present invention relates to a thermosetting adhesive film and a coverlay film comprising the same, and more specifically to a thermosetting adhesive film which has excellent ion migration resistance while having a low dielectric permittivity, as well as excellent peel-off strength, and to a coverlay film comprising the thermosetting adhesive film.

The present application provides a curable composition having appropriate viscosities and thixotropy before and after curing even if an excessive amount of filler is included and without any sedimentation phenomenon of particles even in long-term storage, wherein the curable composition comprises a polyolefin binder having an acid anhydride unit, a filler and a dispersant, and the dispersant comprise a polymer compound containing a unit of Formula 1 below:

##STR00001## wherein L.sub.1, L.sub.2, p and q are described herein.

The present application provides a curable composition having appropriate viscosities and thixotropy before and after curing even if an excessive amount of filler is included and without any sedimentation phenomenon of particles even in long-term storage, wherein the curable composition comprises a polyolefin binder having an acid anhydride unit, a filler and a dispersant, and the dispersant comprise a polymer compound containing a unit of Formula 1 below:

##STR00001## wherein L.sub.1, L.sub.2, p and q are described herein.

A self-healing hydraulic seal is provided. The self-healing hydraulic seal is prepared from a water-swellable elastomeric composition comprising a base polymer and a plant-based polysaccharide.

A self-healing hydraulic seal is provided. The self-healing hydraulic seal is prepared from a water-swellable elastomeric composition comprising a base polymer and a plant-based polysaccharide.

Provided are compositions and associated methods for producing elastomeric rubber gloves with improved strength and flexibility at desirable glove palm thicknesses. An example elastomeric rubber glove comprises a substrate formed from a composition comprising a synthetic rubber latex, and an ionic liquid. The ionic liquid may comprise a combination of one or more alkyl imidazole ionic salts. The composition may comprise one or more metal oxides, including at least one of zinc oxide, magnesium oxide, cadmium oxide, and aluminum oxide. The synthetic rubber latex compositions were found to yield a material with strength and flexibility characteristics comparable to natural latex gloves of a greater thickness. The described gloves may also be cured without the addition of Sulphur and other vulcanization or rubber accelerators, further reducing the risk of allergies and costs of production.

Provided are compositions and associated methods for producing elastomeric rubber gloves with improved strength and flexibility at desirable glove palm thicknesses. An example elastomeric rubber glove comprises a substrate formed from a composition comprising a synthetic rubber latex, and an ionic liquid. The ionic liquid may comprise a combination of one or more alkyl imidazole ionic salts. The composition may comprise one or more metal oxides, including at least one of zinc oxide, magnesium oxide, cadmium oxide, and aluminum oxide. The synthetic rubber latex compositions were found to yield a material with strength and flexibility characteristics comparable to natural latex gloves of a greater thickness. The described gloves may also be cured without the addition of Sulphur and other vulcanization or rubber accelerators, further reducing the risk of allergies and costs of production.

A carbamate ester compound represented by the general formula:

Z—OCONH(CH.sub.2).sub.nNHCOO—Z  [I]

wherein Z is [i], [ii], or [iii] below, and n is an integer of 2 to 10,

##STR00001##

(wherein R.sup.1 and R.sup.2 are each independently a lower alkyl group having 1 to 5 carbon atoms, R.sup.3 is a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms, and a is 1 or 2). The carbamate ester compound is used as a vulcanizing agent for carboxyl group-containing acrylic rubber and improves the delay of the vulcanization rate by scorch suppression.