Glass strands capable of reinforcing organic and/or inorganic materials

Patent metadata

Field	Value
Publication number	US-2016176754-A1
Application number	US-201615055898-A
Country	US
Kind code	A1
Filing date	Feb 29, 2016
Priority date	Dec 16, 2004
Publication date	Jun 23, 2016
Grant date	—

Abstract

The invention relates to glass reinforcement strands whose composition comprises the following constituents in the limits defined below, expressed as percentages by weight:
SiO 2 50-65% Al 2 O 3 12-20% CaO 12-17% MgO  6-12% CaO/MgO ≦2, preferably ≧1.3 Li 2 O 0.1-0.8%, preferably ≦0.6% BaO + SrO 0-3% B 2 O 3 0-3% TiO 2 0-3% Na 2 O + K 2 O <2% F 2 0-1% Fe 2 O 3  <1%.
These strands are made of a glass offering an excellent compromise between its mechanical properties, represented by the specific Young's modulus, and its melting and fiberizing conditions.

First claim

1 - 35 . (canceled)

36 . A glass reinforcement strand formed from a composition comprising the following constituents in the limits defined below, expressed as percentages by weight:

SiO 2
50-65%

Al 2 O 3
12-20%

CaO
12-17%

MgO
 6-12%

CaO/MgO
≧1.3 and ≦2

Li 2 O
0.1-0.8%

BaO + SrO
0-3%

B 2 O 3
0-3%

TiO 2
0-3%

Na 2 O + K 2 O
<2%

F 2
0-1%

Fe 2 O 3
 <1%,

wherein the composition has an Al 2 O 3 +MgO+Li 2 O content equal to 23% or higher, and wherein said glass strand has a specific Young's modulus of at least 36 MPa/Kg/m 3 .

37 . The glass reinforcement strand of claim 36 , wherein the composition has an SiO 2 +Al 2 O 3 content of greater than 70%.

38 . The glass reinforcement strand of claim 36 , wherein said composition contains no F 2 .

39 . The glass reinforcement strand of claim 36 , wherein said composition contains no B 2 O 3 .

40 . The glass reinforcement strand of claim 36 , wherein said glass stand possesses an anorthite crystallization phase, a diopside crystallization phase, and a forsterite crystallization phase.

41 . The glass reinforcement strand of claim 40 , wherein said composition is in the diopside crystallization phase at its liquidus temperature.

42 . The glass reinforcement strand of claim 41 , wherein said composition exhibits a reduced maximum crystalline growth rate in the diopside crystallization phase.

43 . The glass reinforcement strand of claim 42 , wherein said reduced maximum crystalline growth rate in the diopside crystallization phase is at least 50% below a glass composition having the same quantity of the constituents but having a CaO/MgO range of greater than 2.0.

44 . The glass reinforcement strand of claim 36 , wherein said composition comprises 13-15% by weight CaO.

45 . An assembly comprising a plurality of the glass strands of claim 36 .

46 . A composite comprising a plurality of the glass strands of claim 36 and at least one of an organic material and an inorganic material.

47 . A glass composition for producing glass reinforcement strands, said glass composition comprising the following constituents in the limits defined below, expressed as percentages by weight:

SiO 2
50-65%

Al 2 O 3
12-20%

CaO
12-17%

MgO
 6-12%

CaO/MgO
≧1.3 and ≦2

Li 2 O
0.1-0.8%

BaO + SrO
0-3%

B 2 O 3
0-3%

TiO 2
0-3%

Na 2 O + K 2 O
<2%

F 2
0-1%

Fe 2 O 3
 <1%,

wherein the composition has an Al 2 O 3 /(Al 2 O 3 +CaO+MgO) weight ratio that ranges from 0.40 to 0.44, wherein said glass strands have a liquidus temperature of 1,210° C. or below, and wherein said glass strand has a specific Young's modulus of greater than 36 MPa/Kg/m 3 .

48 . The composition of claim 47 , wherein said composition has a forming range (T(log η=3)-T liquidus ) of more than 50° C.

49 . The composition of claim 47 , wherein the composition has an Al 2 O 3 +MgO+Li 2 O content equal to 23% or higher.

50 . The composition of claim 47 , wherein said composition contains no B 2 O 3 .

51 . The composition of claim 47 , wherein said composition comprises 12.5-15% by weight CaO.

52 . A glass reinforcement strand formed from a composition comprising the following constituents in the limits defined below, expressed as percentages by weight:

SiO 2
58-63%

Al 2 O 3
13-18%

CaO
12.5-15%  

MgO
7-9%

CaO/MgO
1.5-1.9  

Li 2 O
0.1-0.8%

BaO + SrO
0-1%

B 2 O 3
0-2%

TiO 2
  0-0.5%

Na 2 O + K 2 O
<0.8%

F 2
0-1%

Fe 2 O 3
 <0.5%,

Assignees

• Ocv Intellectual Capital Llc

Inventors

• Lecomte Emmanuel
• Berthereau Anne

Classifications

• C03C13/00 Primary

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · CPC title

• C03C3/091

  containing aluminium · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• Y10T442/30

  Woven fabric [i.e., woven strand or strip material] · CPC title

• C03C3/076 Primary

  with 40% to 90% silica, by weight {(C03C3/045 takes precedence)} · CPC title