Process for the manufacture of vinylidene fluoride polymers and use of vinylidene fluoride polymers for paint formulation
AssigneeSolvay & Cie
InventorsXavier Bacque, Pierre Lasson
Life of this patent
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Abstract
Process for the manufacture of vinylidene fluoride polymers by noncontinuous polymerization of vinylidene fluoride in an aqueous medium with the use of peroxydisulphates as initiators and in the absence of emulsifying agent, in which an alkyl acetate, employed as a chain-control agent, is introduced into the initial aqueous charge intended for the polymerization. Use of the resulting vinylidene fluoride polymers for the manufacture of paints and, more particularly, of paints intended for prelacquering metal sheets with improved gloss.
Claims11
Process for the manufacture of a vinylidene fluoride polymer, comprising:
- a) introducing a chain control agent comprising an alkyl acetate having an alkyl group of 1 to 3 carbon atoms into an aqueous medium;
- and
- b) non-continuous polymerizing vinylidene fluoride in said aqueous medium in the presence of an initiator comprising a peroxydisulphate and in the absence of an emulsifying agent.
Process for the manufacture of a vinylidene fluoride polymer, comprising:
- a) introducing a chain control agent comprising an alkyl acetate having an alkyl group of 1 to 3 carbon atoms into an aqueous medium;
- and
- b) non-continuous polymerizing a mixture of monomers comprising at least 85 mol % of vinylidene fluoride in said aqueous medium in the presence of an initiator comprising a peroxydisulphate and in the absence of an emulsifying agent.
Dependencies are inferred from the claim text.