JP2006213930A5

JP2006213930A5 -

Info

Publication number: JP2006213930A5
Application number: JP2006125076A
Authority: JP
Filing date: 2006-04-28
Publication date: 2007-11-01
Anticipated expiration: 2024-11-15

Claims

A thermally expandable microsphere composed of an outer shell made of a thermoplastic resin and a foaming agent encapsulated therein and having a boiling point equal to or lower than the softening point of the thermoplastic resin, and having an average particle diameter of 1 to 100 μm,
The foaming agent contains a fluorine-containing compound having 2 to 10 carbon atoms, which has an ether structure and does not contain a chlorine atom and a bromine atom,
The thermoplastic resin is obtained by polymerizing a monomer mixture containing a nitrile monomer and a carboxyl group-containing monomer as essential components, and the weight ratio of the nitrile monomer is in the monomer mixture. Thermally expandable microspheres, which are 20 to 80% by weight with respect to the weight ratio of the carboxyl group-containing monomer of 80 to 20% by weight.

An average particle comprising an outer shell made of a thermoplastic resin, a foaming agent encapsulated therein and having a boiling point equal to or lower than the softening point of the thermoplastic resin, and an anti-fusing agent attached to the outer surface of the outer shell. A thermally expandable microsphere having a diameter of 1 to 100 μm,
The foaming agent contains a fluorine-containing compound having 2 to 10 carbon atoms, which has an ether structure and does not contain a chlorine atom and a bromine atom,
The thermoplastic resin is obtained by polymerizing a monomer mixture containing a nitrile monomer and a carboxyl group-containing monomer as essential components, and the weight ratio of the nitrile monomer is in the monomer mixture. 20 to 80% by weight, and the weight ratio of the carboxyl group-containing monomer is 80 to 20% by weight,
A thermally expandable microsphere, wherein the thermal fusion inhibitor is at least one selected from an organic compound having a melting point of 90 ° C. or higher and an inorganic compound having a layered structure.

An average particle comprising an outer shell made of a thermoplastic resin, a foaming agent encapsulated therein and having a boiling point equal to or lower than the softening point of the thermoplastic resin, and an anti-fusing agent attached to the outer surface of the outer shell. A thermally expandable microsphere having a diameter of 1 to 100 μm,
The foaming agent contains a fluorine-containing compound having 2 to 10 carbon atoms, which has an ether structure and does not contain a chlorine atom and a bromine atom,
A thermally expandable microsphere, wherein the thermal fusion inhibitor is at least one selected from an organic compound having a melting point of 90 ° C. or higher and an inorganic compound having a layered structure.

A method for producing thermally expandable microspheres comprising an outer shell made of a thermoplastic resin, and a foaming agent encapsulated therein and having a boiling point not higher than the softening point of the thermoplastic resin,
Mixing the monomer mixture with the blowing agent and then subjecting the resulting mixture to suspension polymerization in an aqueous suspension;
The monomer mixture includes a nitrile monomer and a carboxyl group-containing monomer as essential components, and the weight ratio of the nitrile monomer is 20 to 80% by weight with respect to the monomer mixture. The weight ratio of the carboxyl group-containing monomer is 80 to 20% by weight,
A method for producing thermally expandable microspheres, wherein the blowing agent is a fluorine-containing compound having 2 to 10 carbon atoms, which has an ether structure and does not contain chlorine atoms and bromine atoms.

A method for producing thermally expandable microspheres comprising an outer shell made of a thermoplastic resin, and a foaming agent encapsulated therein and having a boiling point not higher than the softening point of the thermoplastic resin,
Mixing the monomer mixture with the blowing agent and then subjecting the resulting mixture to suspension polymerization in an aqueous suspension;
The foaming agent is a fluorine-containing compound having 2 to 10 carbon atoms, which has an ether structure and does not contain chlorine and bromine atoms.
Method for producing heat-expandable microspheres Rise Zhang initiation temperature of the heat-expandable microspheres is 100 ° C. or higher.

The thermal expansion according to claim 4 or 5 , further comprising a step of adhering at least one kind of heat fusion inhibitor selected from an organic compound having a melting point of 90 ° C or higher and an inorganic compound having a layered structure to the outer surface of the outer shell. Method for producing functional microspheres.

Thermal expansion comprising an outer shell made of a thermoplastic resin, a foaming agent encapsulated in the outer shell and having a boiling point equal to or lower than the softening point of the thermoplastic resin, and an anti-fusing agent attached to the outer surface of the outer shell A method for producing a functional microsphere,
Mixing a monomer mixture with the blowing agent and then subjecting the resulting mixture to suspension polymerization in an aqueous suspension;
Adhering to the outer surface of the outer shell at least one heat fusion inhibitor selected from an organic compound having a melting point of 90 ° C. or higher and an inorganic compound having a layered structure,
A method for producing thermally expandable microspheres, wherein the blowing agent is a fluorine-containing compound having 2 to 10 carbon atoms, which has an ether structure and does not contain chlorine atoms and bromine atoms.

The fluorine-containing compound is selected from the group consisting of C ₃ HF ₆ OCH ₃ , C ₂ HF ₄ OC ₂ H ₂ F ₃ , C ₃ F ₇ OCH ₃ , C ₄ F ₉ OCH ₃ and C ₄ F ₉ OC ₂ H _5. The method for producing thermally expandable microspheres according to any one of claims 4 to 7 , which is at least one selected.

The method for producing thermally expandable microspheres according to any one of claims 4 to 8 , wherein the aqueous suspension contains a water-soluble reducing agent.

A thermally expandable microsphere composed of an outer shell made of a thermoplastic resin and a foaming agent encapsulated therein and having a boiling point equal to or lower than the softening point of the thermoplastic resin,
The average particle size is in the range of 1-1000 μm;
The expansion ratio at the maximum expansion temperature is over 100%,
The content of the agglomerated microspheres is 5% by weight or less,
Thermally expandable microspheres having a true specific gravity at 25 ° C. of 0.79 g / cc or more and a content of microspheres of 5% by weight or less.