Glass filler and method for producing the same, and resin composition including glass filler

Patent metadata

Field	Value
Publication number	US-12534397-B2
Application number	US-202017596886-A
Country	US
Kind code	B2
Filing date	Jun 19, 2020
Priority date	Jun 21, 2019
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

The present disclosure provides a novel glass filler that has a low permittivity and is suitable for mass production. A glass filler provided includes a glass composition that includes, in wt %, for example, 40≤SiO 2 ≤60, 25≤B 2 O 3 ≤45, 0<Al 2 O 3 ≤18, 0<R 2 O≤5, and 0≤RO≤12, and satisfies at least one of: i) SiO 2 +B 2 O 3 ≥80 and SiO 2 +B 2 O 3 +Al 2 O 3 ≤99.9; and ii) SiO 2 +B 2 O 3 ≥78, SiO 2 +B 2 O 3 +Al 2 O 3 ≤99.9, and 0<RO<10. Another glass filler provided includes a glass composition that includes SiO 2 , B 2 O 3 , Al 2 O 3 , R 2 O, and 3<RO<8 at the same contents as the above, and satisfies SiO 2 +B 2 O 3 ≥75 and SiO 2 +B 2 O 3 +Al 2 O 3 <97, where R 2 O=Li 2 O+Na 2 O+K 2 O and RO=MgO+CaO+SrO.

First claim

The invention claimed is:

1 . A glass filler comprising a glass composition,
the glass filler being in a form of at least one selected from the group consisting of a glass flake, a chopped strand, a glass powder, a glass bead, and a flaky glass, wherein the glass composition comprises, in wt %:
40≤SiO 2 ≤60;

30<B 2 O 3 ≤45;

5≤Al 2 O 3 ≤15; and

0.01≤T-Fe 2 O 3 ≤0.5,

wherein the glass composition satisfies:
SiO 2 +B 2 O 3 ≥80; and/or

SiO 2 +B 2 O 3 ≥78 and 0<RO<10, wherein

the glass compositions further satisfies:
0<R 2 O≤5; and

0<RO<15,
where R 2 O is at least one oxide selected from Li 2 O, Na 2 O, and K 2 O; RO is at least one oxide selected from MgO, CaO, and SrO; and T-Fe 2 O 3 is total iron oxide calculated as Fe 2 O 3 in the glass composition.

2 . A resin composition comprising:
the glass filler according to claim 1 ; and a thermoplastic resin.

3 . A method for manufacturing a glass filler, the method comprising:
melting the glass composition according to claim 1 ; and forming the molten glass composition into a glass filler.

4 . A method for manufacturing the glass filler according to claim 1 , the method comprising:
melting a glass raw material, the glass raw material being prepared such that a glass composition constituting the glass filler is obtained from the glass raw material; and forming the glass raw material being molten into the glass filler.

5 . A glass filler comprising a glass composition,
the glass filler being in a form of at least one selected from the group consisting of a glass flake, a chopped strand, a glass powder, a glass bead, and a flaky glass, wherein the glass composition comprises, in wt %:
53≤SiO 2 ≤58;

26≤B 2 O 3 ≤29.9;

7.5≤Al 2 O 3 ≤18;

0≤CaO≤3.5;

0≤ZnO≤1; and

0.01≤T-Fe 2 O 3 ≤0.5,

where T-Fe 2 O 3 is total iron oxide calculated as Fe 2 O 3 in the glass composition, wherein the glass composition satisfies, in wt %, SiO 2 +B 2 O 3 ≥80, wherein a permittivity at a frequency of 1 GHz is 4.4 or less, a dielectric loss tangent at a frequency of 1 GHz is 0.007 or less, and a temperature T2 at which a viscosity is 10 2 dPas is 1700° C. or less.

6 . The glass filler according to claim 5 , wherein
the glass composition comprises, in wt %:
53≤SiO 2 <58;

26≤B 2 O 3 ≤29.9;

7.5≤Al 2 O 3 ≤18;

0≤Li 2 O≤1.5;

0≤Na 2 O≤1.5;

0≤K 2 O≤1;

0≤MgO<10;

0≤CaO≤3.5;

0≤SrO≤5;

0≤ZnO≤1; and

0.01≤T-Fe 2 O 3 ≤0.5, wherein

the glass compositions further satisfies:
0<R 2 O≤4; and

1≤RO<10,

where R 2 O is at least one oxide selected from Li 2 O, Na 2 O, and K 2 O, and RO is at least one oxide selected from MgO, CaO, and SrO.

7 . The glass filler according to claim 5 , wherein
the glass composition is substantially free of BaO and PbO.

8 . The glass filler according to claim 5 , wherein
the glass composition is substantially free of TiO 2 .

9 . The glass filler according to claim 5 , wherein
the glass composition comprises, in wt %, 0<TiO 2 ≤1.

10 . The glass composition according to claim 5 , comprising, in wt %, SnO 2 <0.5.

11 . The glass composition according to claim 5 , comprising, in wt %, BaO<0.5.

12 . The glass composition according to claim 5 , comprising, in wt %, 53≤SiO 2 <55.

13 . The glass composition according to claim 5 , comprising, in wt %, 27≤B 2 O 3 ≤29.9.

14 . A resin composition comprising:
the glass filler according to claim 5 ; and a thermoplastic resin.

15 . A method for manufacturing a glass filler, the method comprising:
melting the glass composition according to claim 5 ; and forming the molten glass composition into a glass filler.

16 . A method for manufacturing the glass filler according to claim 5 , the method comprising:
melting a glass raw material, the glass raw material being prepared such that a glass composition constituting the glass filler is obtained from the glass raw material; and forming the glass raw material being molten into the glass filler.

17 . A glass filler comprising a glass composition, the glass filler being in a form of at least one selected from the group consisting of a glass flake, a chopped strand, a glass powder, a glass bead, and a flaky glass, wherein
the glass composition comprises, in wt %:
53≤SiO 2 ≤58;

26≤B 2 O 3 ≤29.9;

10≤Al 2 O 3 <15;

0≤CaO≤3.5;

0≤ZnO≤1; and

0.01≤T-Fe 2 O 3 ≤0.5,

wherein the glass composition satisfies:
SiO 2 +B 2 O 3 ≥82;

SiO 2 +B 2 O 3 +Al 2 O 3 ≤98;

0<R 2 O≤5; and

0<RO<15,
where R 2 O is at least one oxide selected from Li 2 O, Na 2 O, and K 2 O; RO is at least one oxide selected from MgO, CaO, and SrO; and T-Fe 2 O 3 is total iron oxide calculated as Fe 2 O 3 in the glass composition.

18 . A resin composition comprising:
the glass filler according to claim 17 ; and a thermoplastic resin.

19 . A method for manufacturing a glass filler, the method comprising:
melting the glass composition according to claim 17 ; and forming the molten glass composition into a glass filler.

20 . A method for manufacturing the glass filler according to claim 17 , the method comprising:
melting a glass raw material, the glass raw material being prepared such that a glass composition constituting the glass filler is obtained from the glass raw material; and forming the glass raw material being molten into the glass filler.

Assignees

• Nippon Sheet Glass Co Ltd

Inventors

• Nakamura Aya
• Yagyu Tomohiro
• Fukuchi Hidetoshi
• Kurachi Junji

Classifications

• C03C2213/00

  Glass fibres or filaments · CPC title

• C08K7/14

  Glass · CPC title

• C08K3/40

  Glass · CPC title

• C03C12/00

  Powdered glass (C03C8/02 takes precedence); Bead compositions · CPC title

• C03C3/091 Primary

  containing aluminium · CPC title