| 摘要 |
This invention relates to an adhesive composition for applying a plastic film of a vapor penetrable backing or core material comprising an aqueous emulsion of an aliphatic 1-olefin and a vinyl ester of a lower monocarboxylic acid, the proportions of olefin in the copolymer being from 5-25 parts by weight the proportion of vinyl ester being the necessary remainder to make 100 parts total weight of copolymer and a water dispersible non-separating combination of (1) a water soluble ester of a mono- C1-C4 alkyl ether of a C2-C8 glycol with a C2-C4 saturated monocarboxylic aliphatic acid and (2) a plasticizing ester of glycerin with saturated C2-C4 monocarboxylic aliphatic acid, the ester of the said ether and the plasticizing ester being dispersed in substantially non-separating condition in the aqueous phase of the emulsion.
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