Chloroprene polymer latex composition, and dip molded body
AssigneeDenka Company Limited
InventorsMisaki ITO, Masahiro KATO, Yushi KUMAGAI
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Abstract
A chloroprene polymer latex composition being a mixture of a chloroprene polymer latex A and a chloroprene polymer latex B, in which a 2,3-dichloro-1,3-butadiene copolymerized amount in a chloroprene polymer of the chloroprene polymer latex B is 3% by mass or more, a toluene insoluble content of the chloroprene polymer of the chloroprene polymer latex B is 70% by mass or more, a weight average molecular weight of a toluene soluble content in the chloroprene polymer latex A is 5,000 to 250,000, and a specific mass ratio b/a is 0.10 or more.
Claims19
A chloroprene polymer latex composition being a mixture of a chloroprene polymer latex A and a chloroprene polymer latex B, wherein
- the chloroprene polymer latex A and the chloroprene polymer latex B comprise a chloroprene polymer,
- the chloroprene polymer of the chloroprene polymer latex B contains a copolymer of chloroprene with 2,3-dichloro-1,3-butadiene,
- a 2,3-dichloro-1,3-butadiene copolymerized amount in the chloroprene polymer of the chloroprene polymer latex B is 3% by mass or more with respect to a total of 100% by mass of the chloroprene and the 2,3-dichloro-1,3-butadiene,
- a toluene insoluble content of the chloroprene polymer of the chloroprene polymer latex B is 70% by mass or more,
- a weight average molecular weight of a toluene soluble content in the chloroprene polymer latex A is 5,000 to 250,000, and
- in a measurement result of gas chromatograph mass spectrometry of an extract which is extracted from a dried product obtained by freeze-drying the chloroprene polymer latex composition with an ethanol/toluene azeotropic mixture, a mass ratio b/a of a total amount b of abietic acid, neoabietic acid, palustric acid, levopimaric acid, and salts thereof with respect to a total amount a of dehydroabietic acid, pimaric acid, isopimaric acid, dihydroabietic acid, and salts thereof is 0.10 or more.
Dependencies are inferred from the claim text.