Elastomeric film-forming compositions and articles made from the elastomeric film

A method of manufacturing a glove, comprising the use of an elastomeric film-forming composition comprising:

• (a) a copolymer formed from monomers consisting of chlorobutadiene and an ethylenically unsaturated carboxylic acid or ester in which the ethylenically unsaturated carboxylic acid or ester has the formula:
• CR1H═CR2—C(O)—OR3
• or
• CR1H═CR2—O—C(O)—R3
• wherein
• R1 is hydrogen, an alkyl radical containing 1 to 4 carbon atoms, —C(O)—OR4 or —R5—C(O)—OH, wherein R4 is hydrogen or an alkyl radical containing 1 to 4 carbon atoms and R5 is an alkyl radical containing 1 to 4 carbon atoms;
• R2 is hydrogen, an alkyl radical containing 1 to 4 carbon atoms, or a carboxymethyl radical;
• R3 is hydrogen, an alkyl radical containing 1 to 4 carbon atoms, or —R6O—C(O)—CR7═CR8, wherein R6 is an alkyl radical containing 1 to 4 carbon atoms, and R7 and R8 are each independently hydrogen or an alkyl radical containing 1 to 4 carbon atoms;
• and
• cis or trans isomers thereof,
• (b) a second elastomer selected from the group consisting of nitrile rubber, styrene butadiene rubber, polyvinylchloride, and mixtures thereof;
• and
• (c) one or more cross-linking agents, wherein the composition has a pH within the range of from 8.5-13.5.

A dipped article made from an elastomeric film-forming composition comprising:

• (a) a copolymer formed from monomers consisting of chlorobutadiene and 0.01% to 8% by weight, based on the weight of chlorobutadiene, of an ethylenically unsaturated carboxylic acid or ester in which the ethylenically unsaturated carboxylic acid or ester has the formula:
• CR1H═CR2—C(O)—OR3
• or
• CR1H═CR2—O—C(O)—R3
• wherein
• R1 is hydrogen, an alkyl radical containing 1 to 4 carbon atoms, —C(O)—OR4 or —R5—C(O)—OH, wherein R4 is hydrogen or an alkyl radical containing 1 to 4 carbon atoms and R5 is an alkyl radical containing 1 to 4 carbon atoms;
• R2 is hydrogen, an alkyl radical containing 1 to 4 carbon atoms, or a carboxymethyl radical;
• R3 is hydrogen, an alkyl radical containing 1 to 4 carbon atoms, or —R6O—C(O)—CR7═CR8, wherein R6 is an alkyl radical containing 1 to 4 carbon atoms, and R7 and R8 are each independently hydrogen or an alkyl radical containing 1 to 4 carbon atoms;
• and
• cis or trans isomers thereof,
• (b) a second elastomer selected from the group consisting of nitrile rubber, styrene butadiene rubber, polyvinylchloride, and mixtures thereof;
• and
• (c) cross-linking agents comprising an ionic cross-linking agent which is a metal oxide or metal hydroxide, and a covalent cross-linking agent which is sulphur or a sulphur-containing vulcanising agent,
• wherein the composition has a pH within the range of from 8.5 to 13.5.