US 11,795,276 B2Granted

Composite particles, composite particles for forming liquid-encapsulating particles, liquid-encapsulating particles, method for producing liquid-encapsulating particles, biocatalyst-containing material, biocatalyst-containing material producing apparatus, and biocatalyst-containing material producing method

AssigneeRicoh Company, Ltd.

InventorKoji Iwasaki

Life of this patent

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Abstract

Provided are composite particles including hydrophobic solid particle A and hydrophobic solid particle B over surface of hydrophobic solid particle A, wherein contact angle CAa of hydrophobic solid particle A with water is 110 degrees≤CAa≤180 degrees, contact angle CAb of hydrophobic solid particle B with water is 110 degrees≤CAb≤180 degrees, ratio (d50a/d50b) of number average particle diameter d50a of hydrophobic solid particle A to number average particle diameter d50b of hydrophobic solid particle B is 10≤(d50a/d50b)≤100, and coating ratio CR of composite particles expressed by Formula 1 is 50%≤CR≤500%, Coating ⁢ ratio ⁢ CR ⁢ ( % ) = π ⁡ ( d ⁢ 50 ⁢ b / 2 ) 2 4 ⁢ π ⁡ ( d ⁢ 50 ⁢ a / 2 + d ⁢ 50 ⁢ b / 2 ) 2 × { X b ( g ) / Y b ( g / μm 3 ) / Z b ( μm 3 ) } { X a ( g ) / Y a ( g / μm 3 ) / Z a ( μm 3 ) } × 100 Formula ⁢ 1 where in Formula 1, Xa, Ya, and Za represent mass (g), density (g/cubic micrometer), and volume (cubic micrometer) of hydrophobic solid particle A, and Xb, Yb, and Zb represent mass (g), density (g/cubic micrometer), and volume (cubic micrometer) of hydrophobic solid particle B.

Claims18

Dependent claims

Composite particles comprising:

a hydrophobic solid particle A;
and
a hydrophobic solid particle B over a surface of the hydrophobic solid particle A,
wherein a contact angle CAa of the hydrophobic solid particle A with water is 110 degrees or greater but 180 degrees or less,
wherein a contact angle CAb of the hydrophobic solid particle B with water is 110 degrees or greater but 180 degrees or less,
wherein a ratio (d50a/d50b) of a number average particle diameter d50a of the hydrophobic solid particle A to a number average particle diameter d50b of the hydrophobic solid particle B is 10 or greater but 100 or less, and
wherein a coating ratio CR of the composite particles expressed by Formula 1 below is 50% or higher but 500% or lower,
Coating
⁢
⁢
ratio
⁢
⁢
CR
⁡
(
%
)
=
π
⁡
(
d
⁢
⁢
50
⁢
b
/
2
)
2
4
⁢
π
⁡
(
d
⁢
⁢
50
⁢
a
/
2
+
d
⁢
⁢
50
⁢
b
/
2
)
2
×
[
X
b
⁡
(
g
)
/
Y
b
⁡
(
g
/
μ
⁢
⁢
m
3
)
/
Z
b
⁡
(
μ
⁢
⁢
m
3
)
]
[
X
a
⁡
(
g
)
/
Y
a
⁡
(
g
/
μ
⁢
⁢
m
3
)
/
Z
a
⁡
(
μ
⁢
⁢
m
3
)
]
×
100
Formula
⁢
⁢
1
where in Formula 1, Xa represents a mass (g) of the hydrophobic solid particle A, Xb represents a mass (g) of the hydrophobic solid particle B, Ya represents a density(g/cubic micrometer) of the hydrophobic solid particle A, Yb represents a dens (g/cubic micrometer) of the hydrophobic solid particle B, Za represents a volume (cubic micrometer) of the hydrophobic solid particle A, and Zb represents a volume (cubic micrometer) of the hydrophobic solid particle B.

125 more elements

Liquid-encapsulating particles comprising:

a liquid droplet;
and
composite particles including a hydrophobic solid particle A and a hydrophobic solid particle B over a surface of the hydrophobic solid particle A, wherein a contact angle CAa of the hydrophobic solid particle A with water is 110 degrees or greater but 180 degrees or less, wherein a contact angle CAb of the hydrophobic solid particle B with water is 110 degrees or greater but 180 degrees or less, wherein a ratio (d50a/d50b) of a number average particle diameter d50a of the hydrophobic solid particle A to a number average particle diameter d50b of the hydrophobic solid particle B is 10 or greater but 100 or less, and wherein a coating ratio CR of the composite particles expressed by Formula 1 below is 50% or higher but 500% or lower,
wherein a surface of the liquid droplet is coated with the composite particles,
Coating
⁢
⁢
ratio
⁢
⁢
CR
⁡
(
%
)
=
π
⁡
(
d
⁢
⁢
50
⁢
b
/
2
)
2
4
⁢
π
⁡
(
d
⁢
⁢
50
⁢
a
/
2
+
d
⁢
⁢
50
⁢
b
/
2
)
2
×
[
X
b
⁡
(
g
)
/
Y
b
⁡
(
g
/
μ
⁢
⁢
m
3
)
/
Z
b
⁡
(
μ
⁢
⁢
m
3
)
]
[
X
a
⁡
(
g
)
/
Y
a
⁡
(
g
/
μ
⁢
⁢
m
3
)
/
Z
a
⁡
(
μ
⁢
⁢
m
3
)
]
×
100
Formula
⁢
⁢
1
where in Formula 1, Xa represents a mass (g) of the hydrophobic solid particle A, Xb represents a mass (g) of the hydrophobic solid particle B, Ya represents a density (g/cubic micrometer) of the hydrophobic solid particle A, Yb represents a density (g/cubic micrometer) of the hydrophobic solid particle B, Za represents a volume (cubic micrometer) of the hydrophobic solid particle A, and Zb represents a volume (cubic micrometer) of the hydrophobic solid particle B.

122 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/943,570Filed 30 Jul 2020
Priority: JP 2019-14131631 Jul 2019
Published: US 2021/0032414 A14 Feb 2021
Granted: 24 Oct 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

B01J 13/04
Making microcapsules or microballoons: by physical processes, e.g. drying, spraying
C08J 3/128
Powdering or granulating: polymer particles coated by inorganic and non-macromolecular organic compounds
A01N 25/28
In coated particulate form: microcapsules or nanocapsules
A23P 10/30
Shaping or working of foodstuffs characterised by the products: encapsulation of particles, e.g. foodstuff additives