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WO2002004372A1 - Nouvelle composition de fibre de verre - Google Patents

Nouvelle composition de fibre de verre Download PDF

Info

Publication number
WO2002004372A1
WO2002004372A1 PCT/IT2001/000356 IT0100356W WO0204372A1 WO 2002004372 A1 WO2002004372 A1 WO 2002004372A1 IT 0100356 W IT0100356 W IT 0100356W WO 0204372 A1 WO0204372 A1 WO 0204372A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
weight
compositions
percentage
cao
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IT2001/000356
Other languages
English (en)
Inventor
Edoardo Giovi
Roberto Massini
Marco La Greca
Jorge Pasalaigua Huguet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techint Compagnia Tecnica Internazionale SpA
Original Assignee
Techint Compagnia Tecnica Internazionale SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Techint Compagnia Tecnica Internazionale SpA filed Critical Techint Compagnia Tecnica Internazionale SpA
Priority to AU2001277667A priority Critical patent/AU2001277667A1/en
Publication of WO2002004372A1 publication Critical patent/WO2002004372A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2213/00—Glass fibres or filaments
    • C03C2213/02—Biodegradable glass fibres

Definitions

  • the present invention relates to a new fiberglass composition.
  • Another aim of the invention is to provide a fiberglass composition ensuring easy workability and low tendency to devitrification and capable of giving rise to a product which is also valid from a mechanical point of view and has competitive costs.
  • Fig. 1 is a graphic representation of the trend of the linear absorption coefficient ⁇ (cm" 1 ) against the radiation energy (MeV) , on logarithmic scales, in connection with a first group of different fiberglass compositions ;
  • Fig. 2 is a graphic representation of the trend of the linear absorption coefficient ⁇ (cm -1 ) against the radiation energy (MeV) , on logarithmic scales, relative to a second group of different fiberglass compositions;
  • Fig. 3 is a graphic representation of the trend of the linear absorption coefficient ⁇ (cm -1 ) against the radiation energy (MeV) , on logarithmic scales, relative to a third group of different fiberglass compositions;
  • Fig. 4 is a graphic representation, by a bar chart, of a comparison between the linear absorption coefficient ⁇ of the first composition group at different levels of radiation energies;
  • - Fig. 5 is a graphic representation, by a bar chart, of the comparison between the linear absorption coefficient ⁇ of the second composition group at different levels of radiation energies
  • - Fig. 6 is a graphic representation, by a bar chart, of the comparison between the linear absorption coefficient ⁇ of the third composition group at different levels of radiation energies
  • - Fig. 7 is a representation in the form of a table of the compositions 01, 04, 05, 06, 07, 08, 09, CIO of the first group, of the compositions 02, 011, C12, 013, 014 of the second group and of the compositions 03, 015, Cl ⁇ , C17, C18, 019, C20 of the third group; wherein the linear absorption coefficient ⁇ (cm -1 ) meets the relation
  • I 0 radiation intensity at a thickness of x(cm).
  • the Applicants started from three different fiberglass compositions then carrying out different experimental tests during which one or more of the percentage concentrations of the individual components of the starting compositions were greatly modified.
  • Total amount 99 . 99 wherein the concentrations of the individual components are expressed in percentages by weight and wherein K j , is the sum by weight of the following oxides: K ⁇ Na 2 0%+K 2 0%+CaO%+MgO%+B 2 0 3 %+BaO%)-2Al 2 0 3 %.
  • composition 01 has a good bio-solubility which was detected by short- term inhalation tests ("biopersistance of fibers, short- term exposure by inhalation" EC/TM/26 Rev. 7 1998) on the basis of which the dissolution half cycle of the fiber (T 1/2 ) is calculated which must be lower than 10 days.
  • a value of K x equal to 29.71 corresponds to composition 01.
  • compositions 04 to CIO were obtained which have relatively low K x values, included between 28 and 30, while showing a good bio-solubility degree.
  • compositions 04 to CIO In conceiving and experimenting compositions 04 to CIO, varying values of lead monoxides were inserted, also carrying out variations in the alkaline oxides, alkaline- earth oxides and alumina.
  • barium oxide content for the purpose of evaluating behavior and cooperation of same in the presence of variations, in particular as regards the lead monoxide.
  • composition 02 is different from Cl in particular in terms of percent compositions of Si0 2 , A1 2 0 3 , B 2 0 3 , BaO) , thereby obtaining compositions Oil to C14 which have intermediate K values included between 33 and 36 (see table in Fig. 7) .
  • alkaline oxides kept relatively high values and also boron oxide content was kept high.
  • compositions Oil to C14 a relatively low alumina content was maintained with concentrations of lead monoxide varying between 0.5 to 2.00%.
  • compositions from 01, 02 and C3 Based on the obtained compositions, in particular compositions from 01, 02 and C3, studying the behavior in terms of biosolubility of the fiber that can be obtained with such compositions, and also studying the desirable insulation features for the concerned product, as well as taking into consideration all purposes that the Applicants intended to achieve, it was surprisingly ascertained that particularly advantageous were compositions containing, in percentage by weight:
  • compositions in accordance with the above preestablished ranges in particular when lead monoxide is present in a percentage included between 0.50 and 2.00%, preferably between 0.10 and 2.00%, appeared to be valid in terms of capability of absorption of electromagnetic radiation, in particular of the high-energy type, and bio-soluble in accordance with the dictates of the regulations presently in force, in some case even with a K ⁇ index higher than 40, beyond which value the German TRGS 59505 standard itself judges glass fibers biosoluble without requiring any laboratory test for the purpose.
  • alkaline oxides are present in relatively high percentages and the sum of the alkaline-earth oxides is maintained lower than 12%, in order to avoid devitrification being promoted.
  • Na 2 0 is present in a percentage by weight included between 15 and 20%, whereas K 2 0 is preferably present in a percentage between 0 and 1%.
  • barium oxide still in accordance with the invention, it is preferably present in a percentage lower than 5%, even if its presence is important in increasing the linear absorption coefficient ⁇ , in particular at energy levels close to 0.05 MeV, as shown in Figs. 4 to 6.
  • CaO+MgO is preferably present in a percentage by weight between 7 and 12%, wherein in particular CaO is present in a percentage included between 4 and 10% whereas MgO is present in a percentage by weight varying between 0 and 6%.
  • compositions in accordance with the invention can contemplate the presence of impurities until 2% and additional compounds such as iron oxide Fe 2 0 3 which is present in a percentage by weight included between 0 and 2%, preferably between 0.1 and 1%.
  • compositions Cl to CIO in Fig. 7 compositions Cl to CIO in Fig. 7
  • composition 02 compositions Oil to C14 in Fig. 7
  • compositions 015 to C20 compositions 015 to C20
  • composition group in accordance with the present invention preferably involves the presence of the following ranges expressed in percentages by weight of the corresponding substances:
  • PbO 0.05-2.00% (preferably between 0.10 and 2.00%)
  • compositions of the second group in accordance with the present invention originating from composition C2
  • concentration ranges of the individual components are the following:
  • PbO 0.05-2 (preferably between 0.10 and 2.00%)
  • compositions preferably meet the following ranges of percentages by weight:
  • PbO 0.05-2 preferably between 0.10 and 2.00%
  • the invention achieves important advantages.
  • inclusion of lead monoxide greatly promotes the capability of electromagnetic radiation absorption in particular in ranges between 0.05 and 0.2 MeV.
  • barium oxide too cooperates in increasing the linear absorption coefficient, in particular with reference to energy levels in the order of 0.05 MeV.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

L'invention concerne une nouvelle composition de fibre de verre caractérisée en ce qu'elle comprend en pourcentage en poids: SiO2 50,00-70,00 Al2O3 0,00-3,50 Na2O + K2O 16,00-21,00 CaO + MgO + BaO < 12,50 B2O3 4,00-13,00 Oxydes de métaux lourds 0,05-7,00, de préférence entre 0,10 and 7,00 %.
PCT/IT2001/000356 2000-07-07 2001-07-06 Nouvelle composition de fibre de verre Ceased WO2002004372A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001277667A AU2001277667A1 (en) 2000-07-07 2001-07-06 A new fiberglass composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2000A001537 2000-07-07
IT2000MI001537A IT1318614B1 (it) 2000-07-07 2000-07-07 Nuova composizione per fibre di vetro.

Publications (1)

Publication Number Publication Date
WO2002004372A1 true WO2002004372A1 (fr) 2002-01-17

Family

ID=11445432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2001/000356 Ceased WO2002004372A1 (fr) 2000-07-07 2001-07-06 Nouvelle composition de fibre de verre

Country Status (4)

Country Link
AU (1) AU2001277667A1 (fr)
ES (1) ES2174732B1 (fr)
IT (1) IT1318614B1 (fr)
WO (1) WO2002004372A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11192819B2 (en) 2017-02-24 2021-12-07 Knauf Insulation Sprl Mineral wool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039990A1 (fr) * 1996-04-24 1997-10-30 Owens Corning Compositions en verre ayant des valeurs ki elevees et fibres fabriquees avec ces compositions
US5932499A (en) * 1997-06-17 1999-08-03 Johns Manville International, Inc. Glass compositions for high thermal insulation efficiency glass fibers
US6034014A (en) * 1997-08-04 2000-03-07 Owens Corning Fiberglas Technology, Inc. Glass fiber composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039990A1 (fr) * 1996-04-24 1997-10-30 Owens Corning Compositions en verre ayant des valeurs ki elevees et fibres fabriquees avec ces compositions
US5932499A (en) * 1997-06-17 1999-08-03 Johns Manville International, Inc. Glass compositions for high thermal insulation efficiency glass fibers
US6034014A (en) * 1997-08-04 2000-03-07 Owens Corning Fiberglas Technology, Inc. Glass fiber composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11192819B2 (en) 2017-02-24 2021-12-07 Knauf Insulation Sprl Mineral wool

Also Published As

Publication number Publication date
ES2174732B1 (es) 2004-09-16
ES2174732A1 (es) 2002-11-01
IT1318614B1 (it) 2003-08-27
AU2001277667A1 (en) 2002-01-21
ITMI20001537A0 (it) 2000-07-07
ITMI20001537A1 (it) 2002-01-07

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