 Method for the prevention of ectoparasite-mediated pathogen transmission |
| The invention provides a method for preventing the transmission of an ectoparasite-borne pathogen ... |
|
| Plant for the production of methane |
| I claim: 1. An apparatus for the production of methane from a biomass substrate comprising organic ... |
|
| Biological production of humic acid and clean fuels from coal |
| It is an object of the present invention to overcome the above-noted deficiencies in the prior art. ... |
|
| Particulate foods and pharmaceuticals coated with water-soluble hemicellulose |
| What is claimed is: 1. A particulate product comprising solid particles coated with a water-soluble ... |
|
| Method for preparing preparations having controlled release of an active component |
| I claim: 1. A process for producing a preparation comprising a plurality of granules each having a ... |
|
| Process for reducing traces of abrasion or scratches on the surface of a record carrier |
| We claim: 1. A process for reducing traces of abrasion during printing operations in an ... |
|
| Isotope separation process |
| The uranyl compounds including at least two isotopes of the element which is to be separated (for ... |
|
| Bactericidal tabletting composition and tablets formed therefrom |
| We claim: 1. A tablet formed without a lubricant comprising: dichloroisocyanuric acid or alkali ... |
|
| Method of expanding metallurgical slag |
| We claim: 1. In a method of expanding metallurgical molten slag wherein the molten slag is passed ... |
|
| Separation of alkyl alcohols from alkyldimethylamines |
| Suitable alkyldimethylamines for use in my process contain from 6 to 18 carbon atoms in the alkyl ... |
|
|
Glass composition for alkali-resistant glass fiber
| Details |
Inventors: Iizawa, Yoshihiro;
Assignee: Ikebukuro Horo Kogyo Co., Ltd. (JP)
Primary Examiner: Vertiz; O. R.
Assistant Examiner: Bell; Mark
Attorney, Agent or Firm: Wenderoth, Lind & Ponack
This invention relates to a glass composition for alkali-resistant glass fiber, which comprises: (a) 30 - 57% by weight of SiO.sub.2 ; (b) 12 - 26% by weight of ZrO.sub.2 ; (c) 14 - 26% by weight of R.sub.2 O (wherein R represents Na, K or Li); (d) 1 - 11% by weight of R'O (wherein R' represents Ca, Ba, Mg, Zn or Co); (e) 0.1 - 6% by weight of CaF.sub.2 ; (f) 0.1 - 10% by weight of M.sub.2 (SiF.sub.6) (wherein M represents Na, K or Li); and (g) 0.1 - 12% by weight of B.sub.2 O.sub.3. This invention further relates to a glass composition for alkali-resistant glass fiber, which comprises: (a) 30 - 57% by weight of SiO.sub.2 ; (b) 12 - 25% by weight of ZrO.sub.2 ; (c) 14 - 26% by weight of R.sub.2 O (wherein R represents Na, K or Li); (d) 1 - 11% by weight of R'O (wherein R' represents Ca, Ba, Mg, Zn or Co); (e) 0.1 - 6% by weight of CaF.sub.2 ; (f) 0.1 - 10% by weight of M.sub.2 (SiF.sub.6) (wherein M represents Na, K or Li); (g) 0.1 - 12% by weight of B.sub.2 O.sub.3 ; (h) an effective amount of up to 3% by weight of TiO.sub.2 ; (i) an effective amount of up to 3% by weight of Al.sub.2 O.sub.3 ; and (j) an effective amount of up to 3% by weight of Fe.sub.2 O.sub.3. |
|
DETAILED DESCRIPTION What I claim is: 1.
A glass composition for alkali-resistant glass fiber, said composition having a glass liquification temperature of 750.
degree.
-900.
degree.
C.
, which comprises: (a) 30-48% by weight of SiO.
sub.
2 ; (b) 12-26% by weight of ZrO.
sub.
2 ; (c) 14-26% by weight of R.
sub.
2 O (wherein R represents Na, K or Li); (d) 1-11% by weight of R'O (wherein R' represents Ca, Ba, Mg, Zn or Co); (e) 1-5% by weight of CaF.
sub.
2 ; (f) 0.
1-10% by weight of M.
sub.
2 (SiF.
sub.
6) (wherein M represents Na, K or Li); and (g) 0.
1-12% by weight of B.
sub.
2 O.
sub.
3.
2.
A glass composition for alkali-resistant glass fiber according to claim 1, which additionally contains an effective amount of up to 3% by weight of TiO.
sub.
2, an effective amount of up to 3% by weight of Al.
sub.
2 O.
sub.
3 and an effective amount of up to 3% by weight of Fe.
sub.
2 O.
sub.
3.
3.
A glass composition according to claim 1 wherein the CaF.
sub.
2 is present at 1.
6 to 5% by weight.
4.
A glass composition according to claim 2 wherein the CaF.
sub.
2 is present at 1.
6 to 5% by weight.
Description:
DETAILED EXPLANATION OF THE INVENTION This invention relates to a glass composition.
More particularly, this invention relates to a glass composition for glass fiber used in a cement product as a reinforcing material.
It is well known that glass fiber used as a reinforcing material for cement must be alkali-resistant, and that zirconium oxide is an effective ingredient to impart alkali-resistant properties to glass.
The well known ZrO.
sub.
2 -containing alkali-resistant glass contains 10-25% by weight of ZrO.
sub.
2.
However, the conventional ZrO.
sub.
2 -containing alkali-resistant glass composition has disadvantages is that the fiberizing temperature or glass liquefaction temperature is very high, e.
g.
1100.
degree.
C.
-1300.
degree.
C.
, due to the presence of the ZrO.
sub.
2, and that the viscosity of molten glass at high temperature is very high.
The present invention provides a glass composition for alkali-resistant glass fiber having a high alkali-resistance as well as a low melting point, without the above mentioned disadvantages of the prior arts
|
| Related patents |
|
|
Support matrices for immobilized enzymes
We claim as our invention: 1. An organic-inorganic matrix having pendent covalent bonding sites for enzymatic conjugates which comprises a porous, water-insoluble, solid ...
|
|
|
Method of producing microbial cells from methane
What is claimed is: 1. A method which comprises culturing Methylomonas sp. FERM P-2400 in an aqueous culture medium containing an assimilable nitrogen source and ...
|
|
|
Process for the preparation of L-car-bamyl-amino acids and of the corresponding L-amino acids
What we claim is: 1. A process for the preparation of only one of the two stereoisomer forms of carbamylamino acids comprising: a. subjecting to hydrolysis a racemic ...
|
|
|
Method for producing D-.alpha.-amino acid
What is claimed as new and intended to be secured by Letters Patent is: 1. A method for producing a D-.alpha.-amino acid, which comprises: contacting a 5-substituted ...
|
|
|
Xanthomonas campestris ATCC 31601 and process for use
We claim: 1. A method for the production of a heteropolysaccharide which comprises continuously culturing a degenerative resistant strain of bacteria designated X...
|
|
|
Enzyme entrappment with cellulose acetate formulations
This invention provides an apparatus and method for entrapping enzymes and includes a reactor, formulations, and methods relating to chemical reactors containing ...
|
|
|
Method of cultivating Methylomonas probus on methanol containing medium
OF THE INVENTION The method of this invention comprises the steps of culturing and propagating Methylomonas probus in a medium containing inorganic nutrients and ...
|
|
|
Converting enol ester precursor of a benzoyl-1,3-cycloalkyldione to a benzoyl-1,3-cycloalkyldione
OF THE PRESENT INVENTION The enol ester precursor of the benzoyl-1,3-cycloalkyldione has the general formula: ##STR1## where R is a substituted or unsubstituted phenyl ...
|
|
|
Method for inhibiting uterine fibroid disease with 1,1,2-triphenylbut-1-ene derivatives
OF THE INVENTION The present invention concerns methods for inhibiting uterine fibroid disease and endometriosis in women. The term "inhibit" is defined to include its ...
|
|
|
Process for the manufacture of alkyl pyruvates
OF THE INVENTION The following examples illustrate the invention without in any way limiting its scope. EXAMPLE 1 472 g (4 moles) of ethyl lactate, 64 g (0.4 mole) of ...
|
|
|
Molecular Biology 
