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US 11,174,376 B2Granted
Method for producing polymer latex
AssigneeZeon Corporation
InventorsShunjin Aihara, Junji Kodemura, Yoshitaka Satoh
Life of this patent
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Abstract
A method for producing a polymer latex, includes a step of emulsifying a polymer solution of a synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer, in water in the presence of a rosin and/or a rosin metal salt, thereby obtaining an emulsified liquid, wherein the rosin and/or the rosin metal salt to be used have/has a total content rate of abietic acid, neoabietic acid and palustric acid, and salts thereof, of 5% by weight or less.
Claims13
A method for producing a polymer latex, comprising:
- a step of emulsifying a polymer solution of a synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer, in water in the presence of a rosin and/or a rosin metal salt, thereby obtaining an emulsified liquid, wherein
- the rosin and/or the rosin metal salt to be used have/has a total content rate of abietic acid, neoabietic acid and palustric acid, and salts thereof, of 5% by weight or less, and
- a total content rate of the rosin and/or the rosin metal salt in the polymer latex is more than 1.5 parts by weight based on 100 parts by weight in total of the synthetic polyisoprene and/or the styrene-isoprene-styrene block copolymer included in the polymer latex.
A method for producing a polymer latex, comprising:
- a step of emulsifying a polymer solution of a synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer, in water in the presence of a rosin and/or a rosin metal salt, thereby obtaining an emulsified liquid, wherein
- the rosin and/or the rosin metal salt to be used have/has a total content rate of abietic acid, neoabietic acid and palustric acid, and salts thereof, of 5% by weight or less, and
- the rosin and/or the rosin metal salt to be used have/has a content rate of dehydroabietic acid, of 70 to 100% by weight.
Dependencies are inferred from the claim text.