DE1619131A1 - Impregnation binder for fiberglass products - Google Patents

Description

HÖGER - GRIESSBACH 1619131

to - 93 ■■ -. ■■■:

Feb. 1, 1966 , ^ - '"* * \

Ov, rens "-Corning Fiberglas Corporation Toledo, OMo, U.S.A.

Impregnation binder for slas fiber products

The invention relates to a new “hole temperature resistant” and icelic acid-containing insulating compositions and their Manufacturing. In particular, the invention relates to glass fiber insulation materials provided with a binder! the in the area between yielding, wool-like masses

3 a density of only from 0.016 to 0.048 grams per cm and relatively dense sheet-like structures of substantially permanent shape having a density of between 0 _s 64, and 0, © grams per cm are "Preferably, the invention is concerned with glass fiber insulation materials,

at
in which the glass fibers have their points of contact by means of - ~

ORIGINAL *

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a permanent organic binder, and in which further the resulting mass with a inorganic impregnation binder is saturated, according to the treatment to a ceramic-like one. heat resistant Coating for the glass fibers hardens and also a Exercises auxiliary function as a binder.

The production of glass or glass-like fibers is known to be used as ¥ ärmeisoiation _s Sehalldämro-ungsiBa.terial, filters and textile products. Regardless of their use, articles made of glass or glass-like fibers are in most cases completely or at least partially coated with a synthetic resin insoluble phenol coated? which binds the individual glass fibers together.

Various substances, especially those that, for example the phenol resols, to be classified in the group of synthetic resins sindi have been used since and continue to serve as Binder for fiberglass insulation materials, however go according to the primary organic nature of the bandage *

BATH ORIGINAL 909819/1121

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medium many of the advantageous properties inherent in glass fibers, such as high temperature resistance, are lost. For example, könaen (Ilasfasern be used to up sum softening point of the glass, d »h. To. To temperatures from 1200 to 1500 ⁰ F, without the glass fibers are destroyed. On the other hand, the λ organic binder of the .Type described decompose at temperatures of 300 ⁰ F. As a result, the use of glass fiber insulation materials with organic resin binders is limited by the fact that the ambient temperatures may not exceed 30 to 325 ⁰ F for longer periods and 400 bxs 425 ⁰ P briefly temperature-time limits leads to a. decomposing the binder with all your POLGEN, especially at temperatures above 425 ⁰ F * such that the composite of glass fibers' is destroyed ·. Y /

During the thermal decomposition of such binders Vapors and gases released, which are aggressive and possibly color or discolor neighboring materials.

In the following description, the word "Punking", which is an English technical term for O.ie Property of a binder 1st, under the action

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higher (temperatures relatively quickly and without To oxidize flame formation.

So far, numerous attempts have been made to increase the resistance of binders to "punking" and to adapt the properties of the binders to some extent to those of the glass fibers. For example, the conversion of nitrogenous substances such as melamine, dicyandiamide, urea,! Thiourea, biuret, guanidine and similar compositions with partially condensed phenol-aldehyde derivatives of the resol type has been proposed »to create a resin binder with increased" punking "- To maintain consistency. Although the incorporation of such nitrogen compounds increased ^"n Punklng ⁿ sought from and CBE / thermlsche stability of the binder to glass fiber products manufactured can but still can not be used at ambient temperatures at which the glass fibers themselves are still constantly using these binders" Other proposals for Overcoming the relatively low temperature resistance of the phenol-reaol binders consists in adding other resins, such as, for example, the alkyl resins, to these binders, or it is proposed to use waterglass or

909819/112 1

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L * Febr. 1966 - Ύ-

To use sodium silicate as a binder. However, the latter is disadvantageous because the high sodium ion concentration of commercially available sodium sulfate leads to the glass fibers being attacked by the sodium ones and consequently destroyed; the result is poor strength products which are subject to numerous limitations in their use. In addition, most Versufae have failed * to produce an inorganic binder, which adheres firmly to the glass fibers - ■ Not suitable for use «As a result, there is a strong need for an inorganic binder which, when used in glass fiber products, allows their use ( in the vicinity of the upper temperature limit for the stability of the glass fibers, and which also adheres well to the glass fibers .

The invention creates an inorganic binder that has a high temperature resistance _t does not attack the glass fibers and creates a solid bond between the. Glass fibers guaranteed. .

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The invention provides a binder that a combination of an organic with an inorganic Binder shown, wherein the inorganic impregnation binder is used in such a way and in such amounts that the fibers are provided with a ceramic coating which adheres well to the fibers and which acts as a protective layer for serves the glass fibers and also ensures the interconnection of the glass fibers with one another even at temperatures at which .. the organic binders become ineffective "

By means of the invention, a silicon-containing material is generally obtained Insulating agent with high temperature resistance for glass fibers specified.

According to the invention, the temperature »

and durability, consequently, the usefulness of such

silicon-containing fiber · and tissue materials improved, their The composite is produced by means of organic binders, namely by virtue of the fact that the material provided with the binder is saturated with an inorganic impregnation binder, as described below. Forms when heated the inorganic impregnation binder is a high temperature resistant Coating that guarantees the unchanged quality of the product even at temperatures that are in the

BAD ORlQiNAL 9 0 9 8 19/1121

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Feb. 1, 1966

Close to the softening temperature of the glass fibers themselves

The new, inorganic Irapragnier binder according to the invention contains bentonite and so much boric acid as essential constituents that it is sufficient to convert the bentonite into the hydrogen form and furthermore to form a heat-resistant complex which is fond of reaction when heated. Preferably, the impregnation binder further contains a reactive joyful kaolin, wherein the proportion of boric acid so must be Gros, at least one of the other so Bestandteil6 _t ie either the bentonite or kaolin in its hydrogen form watches Überauf.

Bas silicon-containing material for the manufacture of glass fabrics and Insulation material is known as "fiberglass", including not only fibers made of glass but also those made of glaaähniiohen materials should be understood · The glass fibers can be produced according to known processes, eein, for example according to those described in the ÜS Patentsohrifte 2 206 058 and 2 189 840 procedures described. In addition, superfine glass wool fibers which have recently been manufactured can be used succeeded. Also, glass fibers made from endless glass threads can be used to wake up

. '- 8 9 0 9819/1121

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predetermined lengths have been cut off; but it can auoh about endless, intertwined glass threads or dergl act

In the first t general manufacturing process for such Glass fiber products consists in drawing streams of molten material Glass through small openings at the bottom of a glass malt tank, in the rapid acceleration of these currents to draw them out into threads of a desired diameter "one" Applying the threads or piping to a conveyor belt provided with holes, applying a suitable bandage « means on the fibers when they are in the direction of the Move the conveyor belt, as well as the binding of the Binder in the finished product. Mn second, general Process is known as the "wet process", in which glass

fibers and a suitable binder dissolved in water whereupon the glass fibers with the adhering binder are applied to a uniformly moving grid. Water and some binding agent fly through the grille, with the help of which the glass fibers * stored on it with the Adhering binder can be carried out through a drying oven. A third method is the same as the first, but differs from it in that the binder is used is not added to the glass fibers on the way to the conveyor belt, but one is not mixed with a binding agent

"-". 9 -

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Eehene had talked to each other, who then talked to the Binder is provided, followed by curing of the binder.

In general, the commercially available glass fibers to which the invention pertains have approximately the following composition? Between about 50 # and 75 # .Silicon, up to about 15 # boron trioxide, between about 2 f * and 25 $ alkaline earth metal oxy da such as CaO ₉ MgO, BaO and SrO, the proportion of CaO usually being at least _: 50 # des. The earth alkali metal oxide content is, and g © f £ hr: .. between $ 0 and 15
K ₂ O or both, up to about $ 10> titanium * to 2 »1
Iron oxya and approximately between $ 0 and $ 3
other ilas component © and / or impurities »such as. Mangano ^ d, 21rk © a © a? 3rd and Einko ^ d, can
contain

The products

and

. 3 _e 5 eel

which di © T © rst @ hend

Isönnoa, can © ia @ is
33uröhmesser between
** ^ Should have, though.
β, ^ by 10 "" * inches

eaeer will.

It is n © © & au l3 @ ®erkea,

it is with the

- 10 -

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1. Pebr. 1966

and "Heile ¹¹ in the description indan claims are percentages by weight and parts by weight * unless otherwise stated *

Jaa qrf aniaefae binders:

The resins which are to form the main component of the organic binder according to the invention are phenolic resins and in particular the resins known under the name Resole "The Resoles are obtained by a partial condensation of a phenol with an excess of an aldehyde in an alkaline solution (" The Chemistry of Phenolic Resins ** Robert W. Martia, Jota. Wiley & Sne _f Inc., Hew York, N, Y.). In general, you esaola from a condensation product "won Phtnol ~ aldehyde, which can also be mixed with other hardenable resins

In most cases the resin is made by the condensation of phenol and formaldehyde, although any phenol or aldehyde which can be thermosetted: i Resole condense, can be used · So can instead of formaldehyde. Para-formaldehyde, furfural, acetaldehyde, metaldehyde, fetraldehyde and the like can be used. Instead of phenol (i.e. monohydroay benzene)

909819/1121 BAD O ₁

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equivalent compounds such as Eeeoroin, Xylenole,

Cresols and similar compounds are used, Where the condensation of a phenol-amino-aldehyde appears

is, the resol can with such amino compounds as melamine

Urea, thiourea, dicyandiamide, biuret, guanidine

and similar compounds are condensed · From the

various, enumerated amino compounds

prefers dicyandiamide, urea, biuret, and thiourea ^ da

Corresponding binders do not cause the same dilution problems as is the case with the known binders Binder with dicyandiamide almost or completely g @ ruc1isfr @ i, and the wollehnliotaa made with its help. or Table-like products are more durable and show one greater resistance to "punking" »Apparently the temperature resistance of a single binder is thereby '■ improves that when the binder is stripped off, the dicyandiamide acts as a crosslinking agent by working with the Hethylo! ”“ Groups reacts «without forming ether bonds. > '. ...

Instead of the phenol-aldehydes and the partial condensation products of the phenol-amino-aldehydes, as described above, the resin components of the organic:

Binders also l & m & ensation products from the prepared

909819/1121

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written amino compounds, both one single as well as combinations of these compounds, with aldehydes such as formaldehyde, acetaldehyde and the like. " The usual Reagents are used »such as B. alkali metal hydroxides and alkali metal carbonates. In addition, there are also inorganic acid catalysts such as boric acid and ammonium sulfate and ammonium chloride, and organic acid catalysts, such as maleic, fumaric and phthalic acid and their ammonium salts suitable"

In addition to the proportions of thermosetting resins, the organic binders can also contain other materials; for example, the aqueous binder paste Emulsifiers, antifoam agents, plasticizers, dyes, Flow agents, fillers and extenders and the like. Contain.

A typical organic binder can according to the

can be produced in the following example «Of course, the binders described above are similar or equivalent binders in place of the specific one described Tread binder. In addition, the specified percentages are only to be regarded as an exemplary embodiment.,

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As already stated, the inorganic impregnation binder according to the invention should contain boric acid and bentonite in a hydrogen form. The composition preferably contains boric acid and bentonite and bentonite and / or kaolin should be in a particularly reactive form As a result, the fiber product, such as © in insulating material, can be used at significantly higher temperatures than was the case with earlier PaIX products, which were only made with the help of an inorganic binding agent. Besides these, it was found äaB the i formation and maintenance of a zufriedenstellendeil adhesion d © 3 inorganic binder to the glass fibers depends on the ability of the binder to react zn with the surface of the glass fibers, wherein EIBS such Eejftktion nloht should be of the type that the Bisen »Shafts of the glass fibers are changed or the flexibility and tensile strength of the fibers deteriorate. Ss is known to include certain materials, such as sodium silicates

and Jrä ⁺ Jonenhaltend®, cement-like material © _f di ©

-H-

909819/1121

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Feb. 1, 1966

Attack glass fibers, reducing their tensile strength and Flexibility can be reduced. However, when an inorganic binder is made »which boric acid is combined with bentonite, the result is a boric acid-bentonite system, Ironically, it is assumed that it is bentonite in the "hydrogea" form, from which the sodium has been removed "is5 and it acts like a highly reactive» glass-forming sodium borate in the hydrogen form »can the inventive inorganic impregnator one hydrogen-active KaoLinl ^ lm included.

The BorsäOT © la i © ^ Bs »@i <§mm inorganic impregnation binder neutralizes all @ Xm base of existing sodium ions / before the paste is applied to the fiber product. In addition, the boric acid apparently neutralizes and removes allcätLionen from the surfaces of the glass fibers »whereby additional reactive hydroxyl groups are added to the surface of the glass fibers another reaction of the boric acid and sodium borate in the system with the clay or other constituents.

If such a composition for impregnating a tied fiberglass * product is used

an exchange of H ⁺ ions from kaolin and bentonite,

- 15 -

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dec the hatriizmions were withdrawn with the surface of the optical fibers instead of «whereby the fibers remain in the reactive Hydrog © & Ara '« The natural bentomite reacts as a result of the heating Kaolin clay. And the izuasinäest partially with d @ n T © r © oMedenen All components of the system are also used © boric acid @ © wi @ others Ions extracted from the glass furnace surface with the hydrogen ~ active & fiber surface, being a complex is formed which is extraordinarily stable »esp @@ ®ndere is temperature resistant «

Am suitable Impr & gM ^ s ^ linder tmm and a Kaolin A manufactured whirl, »

Table I by a © chemical ÄasXjs © fei) © tiii®t iut Various other Xtehm®, which are also specified in fabeil © X «know to replace kaolin A in the impregnation binder ο other Keolisalehme than dl® specified can be used under the gate exposure« that after the

with
The watering system reacts to the medium-ßlasfaeer-system.

16 -

inspects)

9 0 98 19 / 112t

A 34 878 b b - 93 1 · Pebr. 1966

a belle I (information in Jt)

Sentonite Bentonite Kaolin Kaolin Kaolin A BA B C

Silicon 63.07 48.90 45.92 45.21 47.02 aluminum 21.08 16.60 37.02 37.75 37.87 iron 3.60 1.00 1.16 1.01 0.80 titanium 0.14 1.20 1.05 1.97 0.21 lime 0.65 6.13 0.32 0.08 0.08 magnesium 2.67 2.17 0.26 0.12 0, * 16 soda 2.20 0.03 0.29 0.19 0.24 Potash 0.37 . 0.20 0.22 0.18 0.20 - 23.50 . 13.75 15 »65 13.49

! Eeilohengrb * ße ~
distribution Micron Bentonite Kaolin A Kaolin B Kaoll # - 10 Micron 85.0 89.5 97.2 83.5 * - 5 Mioron 79.0 82.0 94.0 77.0 Mioron 70.0 69.0 86.0 68.5 Ji.- 1 Micron. 61.0 57.0 75.8 59.0 ^ - 0.5 Micron 50.0 43 * 0 62.0 48.0 ^ - 0.2 26.0 21.0 33.0 24.0

- 17 -

909819/1121

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1 February 1966

The bentonite provides in combination with the boric acid for a ^ remodeling and for gluing the impregnation binder, while the kaolin clay is a reactive filler serves «which ensures the density of the base material ·

In addition to boric acid *, bentonite and kaolin clay · the impregnation binder can contain other materials, | which give the glass fiber products the desired processing properties. For example, dispersion reagents such as sterile thesametaphoephet and other polyphosphates and similar materials can be added to disperse the bentonite and kaolin. In addition, phosphoric acid can be added to control the pH of the pulp to approximately 6.3 to 6.7, thereby dispersing the Clay and the setting of the ¥ is: @ sity of the pulp is facilitated «Other materials, such as wetting agents, in particular sulfi@rt.e Bio & rboxyX acid esters and anti-foam agents, Torzugv / ice © silicones such as Dimethylpolyeiloxan-AntiBohaufflmJöäbel, can be used in the Xmpragnler bands are included. The silicone anti-sciatic agent can be used in a small amount of a Stoddard

or the like, be solved.

In addition, inert fillers can also be used like Pyr © p! i3 & it, pigments, dyes, Weiehmachea?

- 18 -

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Feb. 1, 1966

and other common additives. A typical inorganic impregnation binder can be made according to the following Example to be produced.

AMftjP flhrtmgabaiflniel *

A 600-6nene steak tank with a Cowles agitator (US Patent 2,651,582) was mixed with 400 gallons of water, 2.5 lb. of ifetrium hexametaphosphate, 50 lb boric acid and 220 esr of an eternal aqueous solution filled by phosphoric acid. After ilese ingredients Solved completely diirchsieekt uni, 250 Ib bet were emitted The inside of the tank was then rinsed and # © r Br @ i mir ds with high stirring speed Stirred for at least 15 minutes «When the porridge is well mixed was, another 750 lb. kaolin clay and 2501b fyrophillite added, whereupon the porridge for another 20 minutes was mixed at high stirring speed; then the agitator was turned off and such an amount of water adds that there is 575 gallons of an impregnating binder egg resulted in a solids content of approximately 22.7 # exhibited. After the addition of water was added restart the agitator at low speed and add 5 quart of the following solution:

- 19 -

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4 ounces of a methylpoXysiloxane anti-seizure agent 14 quart of a 75 # aqueous solution of dicarboxylic acid ester surfactant dissolved in 5 Stoddard solvent. Bann was stirred for another 15, after which the porridge was pumped into a circulation tank.

Hit the inorganic impregnation binder produced in this way became an OKLasfaaerafel, in which the glass fibers were connected to each other and. Measured 2 x 24 x 28 inches, treated to be a die of about 0.17 Graism pr © ssr au £ vl © @ «Such were with different alägewe & ieltezi

Kind of saturated, at 400 ° F during 6 stuntems on ignition or loss, temperature resistance

strength and compression strength tested. The versel & ie-

those variants of the Xmprägnier-Binders in Sabelle XI " stated »while the results of the investigations of the impregnated fiberglass panels recorded in Table III

Depending on the type of fiber structure and the desired density of the product, the amount of solids that remain on the glass fibers? can be varied between about 30 % and about $ 200, with

ORIGINAL INSPECTED - 20 -

- '"■' 909819 / Ί 121

A 34 978 b Λ, λ

b - 93 ^{Λ ν}

r. Feb. 1966 - βΟ, -

this information relates to the total weight of the glass fibers in the end product. It is desirable that the solids have an amount between about 60 # and about 100 #.

In addition, the In "prägnier binders of the invention must not be used for and in connection with the application of organic * binder according as it may be desirable in some cases, a mixture organic binder with the inorganic Xmprägnierbinder apply in a working stage.

Table II

'■ - ■■■ "' Components (Ib) - -

Sample kaolin bentonite boric acid pyrepiiyllite

50

1 200 50 10 CVI 150 50 10 3 200 50 20th 4th 200 50 15th 5 200 50 15th 6th 150 15th 7th - 50 10 8th 200 50 20th

200

- 21 -

9 0 98 19/1121

11/618606

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Tabel

III (continued)

to
ο cd

characteristic

Hours at 120O ⁰ I ¹ ,
$ Weight loss ν
upper panel
lower panel

Condemnation (EoIl)
• 'upper panel
lower panel

Interface temperature
top

middle

Surface temp.

Bond strength "
Last Xn Ifo / foot * density in lb / £ oot *

close to 4 hours' at 1ÖÖÖ ^ö p
iast .in Ib / foot * *
Seals in ib / fooV

after 4 hours at IgOO ⁰ P
load in lb / foot * _%
Density in lb / fctot ^

Kotopreeeibility '
lV'foDt ² at 10 °
Deformation ^;

Density in lb / foot ³

after 4 hours bei1QOO ⁰ F

Density in ib / füptS
after 4 hours at 1200 °?

. Density in ! H / tovt *

1-.83 6 ^ 79

Ο 54 0.18

905 865 190

5 10.86

10.38

100.2 9 * 67

1754

11.37

1044

10.58

982

9.74

■ • 1.68 1.75

6.36 .6.98

0.56 Oo57

0.11 0.09

910 870
840 860
215 200

160.6 182.β
10.26 10.89

70.7 121.1
10.20 10.18

68.0 112.6
10.13 9.36

1500 1492
11.36 11.28

908

9.96

903

9 «82

1170
11/10
1113
9.71

T. 32 '5.93

0.47 0.23

870 860 200

267i 9 11.25

120.6 10.43

76.3 10.27

1740

1183 10.56 1365 10.84

213.4
11.71

38.3
10.10

1527

11.22 11.25

723
10.16

138.1
11.40

16.5

824
10.86

1.41 4.25

0.70 0.11

950 890 200

160.2 06/11

92.6 10.94

16.5 9.96

1137

02/11

825 10.83 443 8.65

1.79 6.65

0.55 0.21

860 850 180

209.3 11.11

118.2 10.57

82.5 May 10

1265

10.49

1211 10.45 1025 9.57

1.73 July 6

0.52 0.20

900 875 130

224 11.0

-1183

10.64

738 9.42 841 10 _a 04

A 34.878 b fc - 93

Feb 1, 1966 -

The Zwisohenfcern-Faseirtafeln, which according to the invention have been impregnated »were with the help of a bandage ·» produced by means of containing a phenol-besol produced by the process described below;

A suitable vessel was charged with 5Q parts of phenol, 90 parts of a formalin solution at 45 f> formaldehyde and 3 parts Bariumhydrat. These starting materials were mixed and heated while being driven by a propeller mixer. The batch was first heated to 110 ° F and held at that temperature for 3 hours. The healing temperature was then increased to 40 ° F and held at that value for an additional 4 hours, after which the temperature was finally increased to 160 ° F for one hour. Value of approximately 7.2 neutralized. The final product was then diluted with water such that the solids content was 65 #.

Then the binder was made by mixing the phenolic resole thus prepared with the materials listed below manufactured:

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Beatand parts

lot

Solids in Ib

water 894 eel. Gamma-aminopropyl
triethoacysilane 1.7 Ib Ammonium sulfate 7 Ib Dicyandiamide 240 Ib ammonia 4 GaI Phenolic resoil 86 GaI. with stearic acid
emulsified mineral oil 2.5 GaI

1.7 · 7.0

240.0

440.0 10.0

That. Binder was in a mixing tank with a propeller agitator manufactured at temperatures of approximately 120 F. The final mixture had a solids content of about 8 # ♦ Bas weight ratio of monomeric} dicyandiamide to jPhenol Resole was approximately

The binder composition produced in this way was sprayed into a hood through which hinduroh glass fibers were guided onto a conveyor belt provided with openings. The glass fibers were collected in the form of an arbitrarily matted * wlleähnl-iöken'masse »with. the binder was contaminated »The proportion of the binder after curing was a little over 5 # of the total, wool-like mass. Bas curing took place in an oven at about 45O ⁰ F

909819/1 121

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Δ 34 878 b b - 93 ■

Feb. 1, 1966

instead, through which the glass fibers with the adhering binder were passed for about 5 minutes, the mass being sufficiently compressed so that sheets with densities between 5 _f 25 and 6.25 ^{lb / foot 5} were produced.

For purposes of comparison, but not in accordance with the invention, if an inter-core fiber board (40 to 42 by 10 * ^ inch fiber diameter) with 5t5 $> ignition loss was exposed in an oven to a temperature of 120O ⁰ P, the fibers were burned. "Cohesive binders within an hour" However, the insulation boards currently on the market with a Besol binder, but without an amino compound such as dicyandiamide, are even less temperature-resistant

Of course, there are further modifications with regard to the proportions

the constituents forming the impregnation binder possible. "

For example, the proportion of kaolin in the impregnation binder can be between 0 and 90 percent by weight, preferably between .50 and 80 percent by weight are. The proportion of bentonite can be between 10 and 90 percent by weight and preferably between 15 and 45 percent by weight. The proportion of Boric acid can be between 2 and 45 and preferably between 3 and 15 percent by weight. The proportion of pyrophyllite

- 26 -90 9819/112 1

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Feb. 1, 1966

can be up to 50 and preferably between 20 and 35 percent by weight be.

In addition, the quantitative ratio between the inorganic impregnation binder and the organic binder is variable and it depends on the particular organic binder and the manufacturing process and the desired properties of the end product. In general, however, the ratio should 2 to 40 of inorganic impregnation binder are 1 to organic binder, based on the Dry weight, but a ratio of 15 to 30 of inorganic impregnation binder to 1 of organic is preferred Binder·

Furthermore, the solids content of the impregnation binder can be between 40 and 5 i> and the viscosity can be between 5oPs and 10OcFs.

Although setting times and temperatures can be varied for the impregnation binder within wide limits, for example from 420 to 720 minutes, and 425 to 55O ⁰ F, so the preferred range for most Anwendungszweoke 480-600 minutes and at 425-475 ⁰ F.

In addition, the impregnation binder according to the invention also separates applied to fiberglass products made with the help of others

9 0 9819/1 121 - 27 -

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Binder produced tmrd © Bg®der sit Binder ₈ die

^ above especially ^ escmrietäemen älmllsli sia.d ₀ miS in those

^ Urea or aader © Aaimoplffifee isi iiicsht uugseetster form ί ·

; instead of Bi ^ aadi ^ aid "can be used _β

- 28 -

Sf,

909819/112

Claims (1)

Patent claims: 1. Binder for fiberglass or fiberglass-like Products, characterized in that the binder is an inorganic impregnation binder with bentonite, which is in the hydrogen form prior to admixing, and contains boric acid. 2. Binder according to claim 1, characterized in that the inorganic impregnation binder contains boric acid and bentonite in a weight ratio of 7.4 i> to 18.5 #. 3. Binder according to claim 1 or 2, characterized in that the inorganic impregnation binder kaolin, which is in hydrogen form prior to admixing. 4. Binder according to claim 3, characterized in that the inorganic impregnation binder contains boric acid, bentonite and kaolin in a weight ratio of 7.4% to 18.5 % to 74.1%. - 29 - 909819/1121 A "34 878 to b - 1 Q i o -j S> jr © p & yllit let. iBaae ictoetg dai ia.s Bisademi'l 8. Binder according to claims 7 _g iaämrcb, the organized © binder 909819/1121 A 34 BIB ^ 3 0 "'■ 1.' teaching * 10- Tsrfaliren sum Terlinden of the glass fibers of a glass fiber product raiit®r @ iaander as well as sur producing one TemperaturbeetSndigen terbund with the help of the binding agent mast AaspineYes, 7 öisr B ₉ dadurcn gekrnzeicime-b _s that the iä-l.asfaaarprodiakt m3.1i dem Bisaeioitt ©! soaked and ansonll @ S © ad © rlaitst " 909819/1121