FI62045B - APPRETERINGSMEDEL FOER GLASFIBER - Google Patents

Description

-.-LUJl Γβ1 ADVERTISING PUBLICATION, 0 n A r [B] (11) UTLAGGNINQSSKRIFT 620 4 5 c Patent aySr.netty 10 11 1982

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USA (US) 7UH8I

(71) Owens-Corning Fiberglas Corporation, Fiberglas Tover, Toledo, Ohio 1 + 3659, USA (72) Thomas Anthony Coakley, Heath, Ohio, John Ernest Rubadue, Columbus,

Ohio, Carl Eugene Forman, Heath, Ohio, Robert Arthur Schweizer,

The present invention relates to a glass fiber finishing agent which does not miscolor the product.

In a particular aspect, the present invention is directed to glass finishes mixed with polyamides.

Glass-reinforced polyamides such as nylon are now injection molded into many products in the automotive and equipment industries. In order to achieve the best possible improvement in properties, the composition with which the glass is finished must be suitable for polyamides.

It is known that polyurethanes based on aromatic diisocyanates result in finishes which provide excellent adhesion between glass and polyamides. However, these finishes tend to miscolor laminates made of glass-reinforced nylon materials so that the color of the laminates is not white but instead has the wrong green or brown color.

Many of these polyurethanes are based on toluene derivatives, such as toluene diisocyanate, an aromatic diisocyanate 2,62045, the use of which results in incorrectly colored laminates.

It has now been found that glass finishes suitable for use in glass mixed with polyamides can be prepared using polyurethanes based on aliphatic or cycloaliphatic diisocyanates. The use of the latter substances to a large extent eliminates such discolouration and does not adversely affect the quality of the finished product.

According to the present invention, there is provided a glass finishing agent comprising an aqueous mixture comprising (1) a polyurethane latex emulsion prepared by chain extension of a prepolymer having an NCO end group and prepared from an aliphatic or cycloaliphatic diisocyanate ether and a polyalkylene ether. the reaction product, (2) a silane crosslinking agent and optionally (3) a lubricant.

One particularly suitable polyurethane latex emulsion based on aliphatic or cycloaliphatic diisocyanates that can be used in accordance with the invention is designated X1042H and is available from BASF Wyandotte, Michigan. In this connection, reference is made to U.S. Patent Nos. 3,401,133 and 3,563,943, which describe in detail the preparation of X1042H.

The polyurethane latex emulsion is used in the finishing agent in an amount of about 3 to 20 parts per 100 parts by weight.

Any suitable organosilane-containing crosslinking agent can be used. Preferably an organosilane such as gamma-aminopropyltrimethoxysilane is used. One suitable crosslinking agent of this type is brand name A1100, manufactured by Union Carbide.

The crosslinking agent is used in the finishing agent in an amount of about 0.2 to 4 parts per 100 parts by weight.

Any suitable lubricant can be used. A preferred lubricant is the cationic condensation product of dimethylaminopropylamine and pelargonic acid. This material has a specific gravity of about 1, a viscosity of about 500 cps at 25 ° C and a pH (5% aqueous solution) of about 5.5-7. a preferred lubricant having these properties is available under the tradename Emery Industries under the name Emerstat 6665. Another suitable lubricant is an amide substituted polyethylene amine such as Emery 6717 from Emery Industries.

3 62045

The lubricant is used in the finishing agent in an amount of up to about 5 parts per 100 parts by weight.

The finishing agent of the invention is prepared by conventional methods, as described below. It can be used for any glass fibers commonly used to reinforce compression masses. The finishing agent is added during the molding step so that the solids content of the fibers after drying is about 0.3-2.0% by weight based on the annealing loss.

The best mode for carrying out the invention is illustrated in the following examples.

Example I

This example illustrates the preparation of a finishing agent according to the invention in an amount of about 378 liters.

About 152 liters of demineralized water was added to the main mixing vessel.

About 3.6 kg of gamma-aminopropyltrimethoxysilane (Union Carbide A1100) was mixed with about 37.8 liters of demineralized water in the first premixing vessel until the resulting solution was clear (about 10 minutes), and the solution was added to the contents of the main mixing vessel.

About 27 kg of polyurethane latex emulsion (X1042H) was mixed with about 75.6 liters of demineralized water in a second premixing vessel for about 10 minutes and the resulting mixture was added to the contents of the main mixing vessel.

After complete mixing (about 15 minutes), the contents of the main mixing vessel had a solids content of about 4.7% by weight and a pH of about 9.

The finishing agent prepared as described above was applied to the individual glass fibers by conventional application methods and rates so that the solids content of the fibers after drying was about 0.6% by weight.

Example II

This example illustrates the preparation of a finishing agent according to the invention in an amount of about 378 liters.

About 94 liters of demineralized water was added to the main mixing vessel.

Approximately 3.76 kg of gamma-aminopropyltrimethoxysilane (Union Carbide A1100) was mixed with about 76 liters of dehydrated water in the first premixing vessel when the 6 2 0 4 5 nes solution was clear (about 10 minutes), and the solution was added to the contents of the main mixing vessel. .

About 20.8 kg of polyurethane latex emulsion (X1042H) was mixed with about 76 liters of demineralized water in a second premixing vessel for about 10 minutes and the resulting mixture was added to the main mixing vessel.

About 3.76 kg of lubricant (Emery 6665) was mixed with about 38 liters of demineralized water in a third premixing vessel for about 10 minutes and the resulting mixture was added to the main mixing vessel.

After complete mixing (about 10 minutes), the solids content of the contents of the main mixing vessel was about 2.5-4.5% by weight and the pH was about 9-10.

The finishing agent prepared as described above was applied to the individual glass fibers by conventional application methods and rates so that the solids content of the fibers after drying was about 0.6% by weight.

Example III

This example illustrates the preparation of a compressed product reinforced with glass fibers finished with the finishing agent of Example I.

The finishing agent of Example I was applied to 816 "E" glass fibers having a diameter of about 0.0127-0.014 mm during molding using a roll type applicator. The finished fibers were assembled into a strand. The thread was wound into a bobbin and dried for about 16 hours at about 113 ° C. The solids content of the fiber after drying was about 0.6% by weight.

A spool containing fifty glued strands was attached to the frame, and the strands of fifty spools were joined through guide loops to form a pre-spinning bundle, which was then tempered for 16 hours at 113 ° C. The pre-spinning yarn was pulled out of the pre-spinning bundle and chopped into fibers about 6.4 mm in length.

About 3 parts by weight of the chopped fibers were placed in a mixing cylinder together with about 7 parts by weight of Nation 6.5 having a melt index of 2 and a molecular weight of about 100,000. The resulting mixture was then placed in a 63.5 mm "Pridex Machine Screw Extruder" and electrically heated to about 282 ° C. The mixture 5 62045 was compressed into cylindrical rods with a diameter of 3.2 mm and placed in a "Cumberland Pelletizer" to form granules with a length of 6.4 mm. The granules were in turn fed into an injection molding machine at a temperature of about 288 ° C and formed into a standard test piece according to ASTM D-638.

The test piece was white in color and had a tensile tensile strength of 5 26,000 psi, a modulus of elasticity of 0.84 x 10 kg / cm] and an impact flexural strength of 0.163 kgm / cm according to IZ0D.

It will be apparent from the foregoing that the invention may be modified in many ways within the scope of the following claims.

Claims (7)

A glass fiber finishing agent comprising an aqueous emulsion of a polyurethane made of aliphatic or cycloaliphatic diisocyanates and a silane coupling agent, characterized in that the polyurethane is a polyurethane latex emulsion prepared as an N from the reaction product of a cycloaliphatic diisocyanate and a polyalkylene ether polyol. Finishing agent according to Claim 1, characterized in that the agent further contains a lubricant. Finishing agent according to Claim 2, characterized in that the lubricant is a cationic condensation product of dimethylaminopropylamine and geranium acid. Finishing agent according to Claim 2, characterized in that the lubricant is used in the aqueous composition in an amount of at most about 5 parts per 100 parts by weight. Finishing agent according to Claim 1, characterized in that the silane coupling agent is γ'-aminopropyltrimethoxysilane. Finishing agent according to Claim 1, characterized in that the silane coupling agent is used in the aqueous mixture in an amount of about 0.2 to 4 parts per 100 parts by weight. 6 6 2 0 4 5 Claims Finishing agent according to claim 1, characterized in that the polyurethane latex emulsion is used in the aqueous mixture in an amount of about 3 to 20 parts per 100 parts by weight.