Process for producing polymer particles
AssigneeKao Corporation
InventorsMakoto Tsuji, Yasushi Sasaki
Life of this patent
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Abstract
To provide a process for producing polymer particles which are spherical and have smooth surfaces and small contents of oil- and the solvent-soluble at the time of being compounded. Polymer particles are produced by adding 0.099 to 47 parts by mass of a crosslinking vinyl monomer to 100 parts by mass of a vinyl monomer (referred to hereinafter as the monomer) during polymerization reaction at a degree of monomer polymerization of 1 to 100% in order to polymerize the monomer in a solvent in the presence of a dispersant and a polymerization initiator to give polymer particles.
Claims19
A process for producing polymer particles, which comprises polymerizing a vinyl monomer in a solvent in the presence of a dispersant and a polymerization initiator by adding 0.099 to 47 parts by mass of a crosslinking vinyl monomer to 100 parts by mass of the vinyl monomer to the polymerization reaction mixture at any point where the monomer polymerization degree is 1 to 100%,
- wherein 1 to 10% by mass of the total amount of the crosslinking vinyl monomer is added when the monomer polymerization degree is between 1 to X %, and 1<X≦97, 10 to 45% by mass of the crosslinking vinyl monomer is added when the monomer polymerization degree is between X to Y %, and 30≦Y≦98, and 45 to 89% by mass of the crosslinking vinyl monomer is added when the monomer polymerization degree is between Y to Z %, and 50≦Z≦100, provided that X<Y<Z.
A process for producing polymer particles, which comprises polymerizing a vinyl monomer in a solvent in the presence of a dispersant and a polymerization initiator by adding 0.099 to 47 parts by mass of a crosslinking vinyl monomer to 100 parts by mass of the vinyl monomer to the polymerization reaction mixture at any point where the monomer polymerization degree is 1 to 100%,
- wherein the solvent is a hydrocarbon compound, a silicone compound or a mixture thereof.
A process for producing polymer particles, which comprises polymerizing a vinyl monomer in a solvent in the presence of a dispersant and a polymerization initiator by adding 0.099 to 47 parts by mass of a crosslinking vinyl monomer to 100 parts by mass of the vinyl monomer to the polymerization reaction mixture at any point where the monomer polymerization degree is 1 to 100%, wherein the dispersant is a polysiloxane compound having a radical polymerizable group at one terminal thereof.
Dependencies are inferred from the claim text.