Core-shell-type polymer fine particles having phosphonic acid or phosphonic acid ester structure, particle dispersion, molded article, and method for producing said fine particles
AssigneeMaruzen Petrochemical Co., Ltd.
InventorsShinji Sugihara, Masahiro Endo
Life of this patent
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Abstract
A core-shell type polymeric particle may exhibit good dispersibility in an aqueous medium and excellent flame retardance. A core-shell type polymeric particle may include a core including a hydrophobic polymer (c) and a shell including a copolymer having a repeating unit (a) derived from vinyl phosphonic acid or a vinyl phosphonic acid ester and a repeating unit (b) of formula (α): wherein Ra is H or a methyl group, Rb is a single bond or a carbonyl group, and ring Q1 is a substituted or unsubstituted 4 to 10 membered nitrogen-containing heterocycle.
Claims14
A core-shell type polymeric particle, comprising:
- a core comprising a hydrophobic polymer (c);
- and
- a shell comprising a copolymer comprising
- 10 to 90 mol % a repeating unit (a) derived from vinyl phosphonic acid or a vinyl phosphonic acid ester and 10 to 90 mol % a repeating unit (b) of formula (a):
- wherein
- Ra is H or a methyl group,
- Rb is a single bond or a carbonyl group,
- ring Q1 is a 4 to 10 membered nitrogen-comprising heterocycle;
- and
- wherein the particle has an average particle size in a range of from 100 to 2000 nm.
A method for producing a core-shell polymeric particle, the comprising:
- performing an emulsion polymerization, in an aqueous medium, of a hydrophobic monomer and a copolymer comprising
- 10 to 90 mol % a repeating unit (a) derived from vinyl phosphonic acid or a vinyl phosphonic acid ester and 10 to 90 mol % a repeating unit (b) of formula (a):
- wherein
- Ra is H or a methyl group,
- Rb is a single bond or a carbonyl group,
- ring Q1 is an optionally substituted 4 to 10 membered nitrogen-comprising heterocycle;
- and
- wherein the particle has an average particle size in a range of from 100 to 2000 nm.
Dependencies are inferred from the claim text.