CS252014B1 - Glass fibers with polymer coating - Google Patents

Abstract

Glass fibers permanently coated with 0.4 to 40% by weight of a coating based on a mixture of 50 to 98% by weight of adducts of epoxides and amines, which are plasticized with 2 to 50% by weight of plasticizers based on polyethylene glycols with an average molecular weight of 100 to 4,000 are described. polymers of vinyl and/or olefinic monomers, eg polyvinyl chloride.

Description

252014 3

The present invention relates to glass fibers having a polymer coating.

Glass fibers, whether in the form of various strands, rovings, fabrics, mats, mesh felt, have been widely used and are still expanding application applications. By pulling the glass fibers through different polymers, it is possible to combine the properties of the polymer and the glass, which makes it possible to use polymers and fibers even in areas where they do not find application. In this way, it is possible to use glass fibers and decorative fabrics, adhesive preparations, reticules, insulations and the like.

Glass fibers with different polymeric coatings are known. Czechoslovak Authentication Certificate No. 214,950 discloses fibrous materials coated with an epoxy rubber film prepared by vulcanizing epoxide elastomers using various polyamines. The glass fibers with this coating have a number of good properties, but their crosslinked structure does not allow for good anchoring of other coatings by which the fibers are made for different applications and their low reactivity characterization reduces their interactions with polymers at production of fiberglass. These properties do not have glass fibers with a thermoplastic polymer coating, but their disadvantage is poor adhesion to the anionic glass fiber surface.

We have found that these problems are substantially eliminated by preparing glass fibers with the polymeric thermoplastic coating of the invention.

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a glass fiber having a polymeric coating, and comprising from about 0.4% to about 40%, by weight of glass fibers, of a coating comprising from about 50% to about 98% by weight of secondary dialkanolamine adducts. 6 carbon atoms with dianium-based epoxy resins with an average molecular weight of 300 to 1200 and aliphatic polyamines containing 3-5 amino groups in the molecule with an average molecular weight of 100 to 200 in the molar range of 0.8 to 1; 2: 1: 0.2 to 1.2 and / or ichammonium salts with aliphatic monocarboxylic acids having from 1 to 3 carbon atoms and from 2 to 50% by weight of plasticizers in the range of polyethylene glycols having an average molecular weight of 100 to 4000.

It has been found that, in the manufacture of zepoxy resin laminates and fabric-coated glass fibers coated according to the invention, the mechanical properties exceed those obtained with the use of finished glass fibers with bonding agents. On the other hand, in the case of the need to improve the electrical properties for demanding applications of clad materials, it is possible to achieve them by the addition of trace amounts of the known silane bonding agents.

The coating on glass fibers can be formed by various technologies. Usually, it is treated with melt, a solution in water or in an organic solvent. The stages of the technology used may include coatings of up to 48% by weight of the regulating, adhesion and surface properties of the polymer film. In the case of further application of the melt coatings, these are mainly additives preventing the fibers from sticking together, e.g. stearates. When organic solvents are used as aliphatic alcohols, they are lubricating agents, evaporators and the like. Water as a carrier medium is the most advantageous for economic reasons, not least for environmental and hygienic reasons. In this case, it is also possible to vary the sliding properties with the vigorous lubricants and the surface patches using various surfactants.

The adducts used in accordance with the invention are known and can be prepared by a number of MS processes. aut. osv. 211163. Addition of secondary dialkanolamines such as diethanolamine, diisopropanolamine with dianium-based epoxide produces the corresponding epoxide which is reacted with aliphatic polyamines such as diethylenetriamine, dipropylenetriamine, tetraethylenepentamine.

The application properties of these adducts can vary widely, not only by changing the epoxide or polyamine, but also by mixing them together. Neutralization with, for example, acetic acid can be solubilized using water as the carrier medium. Because all adducts used are solids, they need to be plasticized with polyethylene glycols to the desired degree of elasticity. At the same time, it gives the fibers a pleasant textile character.

The adduct coated glass fibers can be subsequently treated with various commercially available thermoplastic components based on polymers of vinyl and / or olefinic monomers. The surface adduct of the adduct on the surface has the primer function, i.e., the improvement of the glass fiber joining of the thermoplastic. The treatment is usually carried out in the melt. The use of the polyvinyl chloride compositions mainly processes the fibers in the form of sulphate. The vinyl acetate-ethylene copolymer or vinyl acetate-vinyl chloride copolymer coating is suitable for the use of fibers as adhesive ribbons, especially in the manufacture of various types of furniture. Butadiene-styrene-copolymer-coated glass fibers are suitable for use in the manufacture of tires. Concentration and technology are chosen in this case such that the fibers contain from 5 to 95% by weight of the thermoplastic compositions.

The invention is further illustrated by the following form

The compositions in which the composition is referred to by weight concentration. Example 1

Glass fibers in the form of fabric for the phenolplastic reinforcement

Adukt A

Based on an epoxy resin having an average molecular weight of 1,200, dipropylenetriamine and diethanolamine at a molar ratio of 1: 0.2: 1.2. Ethylene glycol monoethyl ether resin solution with 50% dry matter content at 20 ° C 2 305 mPa. The coronated glass fiber fabric was treated by dipping it into a composition composed of 100 wt. parts of the adduct solution A and 40 wt. of polyethylene glycol of an average molecular weight of 600. After removing the excess mixture, it was dried at 130 ° C. The fabric thus treated contains 34% by weight of the coating, is hard, resilient and easy to cut to the desired shape. Example 2

Glass fiber in the form of a strand

Adduct B

Based on an epoxy resin having an average molecular weight of 650, tetraethylenepentamine and diethanolamine at a molar ratio of 1: 0.3: 0.8. The adduct was neutralized with 107 parts by weight of acetic acid and dissolved in ethyl alcohol to a 50% solution with a viscosity at 20 ° C of 1192 mPa. with.

Glass fibers of 10 µm diameter were pre-assembled into a 400 fibrillated strand composition:

Adduct B (50%) 8.00%

Polyethylene glycol 4,000 0.50%

Laurylamidoethylpyridinium chloride 0.10% Water 91.40%

After drying at 120 ° C for 4 hours, the fibers contained 0.45% by weight of the coating. The thus treated fibers coated with 80% by weight of the thermoplastic melt provide ethylene-vinyl acetate copolymers suitable as bonding ribbons for bonding different materials through the use of hot-melt bonding technology. Example 3

Glass fibers in the form of a bundled roll

Adduct C

Based on epoxy resin having an average molecular weight of 370, diethylenetriamine and diisopropanolamine in molar ratio 1; 1: 1. The adduct dissolved in dioxane to 50% solution has a viscosity at 20 ° C of 640µPa. with.

Adukt D

Based on an epoxy resin having an average molecular weight of 380, diethylenetriamine and diethanolamine in a molar ratio of 1: 0.5: 1. The adduct in the form of a 50% solution of ethyl alcohol has a viscosity at 20 ° C of 510mPa. with.

Adduct E

The raw material as in adduct D at a molar ratio of 1: 0.3: 1. The adduct in the form of a 50% solution in ethyl alcohol had a viscosity of 740 mPa.s at 20 ° C. with.

Glass fibers with a diameter of 6 μ 34 texsa are treated directly after the exit with a platinum furnace composition.

Adduct D 3.00%

Adduct E 7,00%

Polyethylene glycol 1,000 1,10%

Lubricant (70%) 1.00%

Acetic Acid 0.70%

Tenzid 2,20%

Water 85.00%

The preparation process consists in homogenizing the two products, mixing them with acetic acid and adding them to water. In addition, the ingredients are added to the water and adduct solution is added with stirring and the composition is filled with water to the desired amount. The glass fiber was processed for 48 hours. bending machines, whereby the imbol is given a twist of 40 and / or 60 turns. This silk-treated method has about 0.8-1.0% coating weight and a tensile strength of 25.4 cN on its surface. In the case of using 12% by weight of adduct C, the same properties are reduced. Example 4

Glass fiber in the form of fabric for epoxy resin reinforcement

The silk prepared according to Example 3 was prepared on the line with an aqueous solution of the ammonium salt of acetic acid adduct E at 2% by weight of adduct and 0.4% by weight of diethylene glycol. From the thus prepared warp material, which contains 2.2 pairs. The weight of the coating can be produced by fabrics suitable for the manufacture of clad materials for the electrical industry. Example 5

Glass fiber in the form of a knotted value

Claims (3)

232014 A 9 µm glass fiber was prepared after the platinum outlet from the furnace as described in Example 3. After 48 hours, it was processed in a bundling machine with a twist of 150 twist. and then bundled together - a twisting twist 2 S150. Wound glass fibers can be used to weave wires and manufacture woven fabrics. Example 6 Glass fiber in the form of fiberglass mesh OBJECT Polymer-Coated Glass Fibers, characterized in that they contain 0.4 to 40% by weight, based on the weight of the glass fiber, of a coating composed of 50 to 93% by weight of adducts based on secondary dialkanolamines having 4 to 6 carbon atoms with epoxy. resins based on dia-nxx having an average molecular weight of 340-1,200 and aliphatic polyamines containing 3-5 amino groups in the molecule having an average molecular weight of 100 to 200 in a molar ratio of 0.8 to 1.2: 1: 0.2 to 1 , 2 and / or their ammonium salts with salifical monocarboxylic acids having 1 to 3 carbon atoms with 2 to 50% by weight of polyethylene glycol-based softeners having an average molecular weight of 100 to 4,000. with an extruder, approximately 70% of the polyvinyl chloride based thermoplastic melt. The thus treated fiber is woven and blended in a conventional manner. The prepared mesh is suitable for a wide range of applications and replacement of conventional metallic or textile fabrics, and can be produced in various color shades by using various pigmentable compositions. vynalezu 2. Glass fibers according to claim 1, characterized in that the coating contains traces of up to 48% by weight of regulating properties such as water-soluble organic diluents, adhesives such as silane bonding agents and polymeric surface properties. coatings such as surfactants, lubricants and pH regulators such as ethyl alcohol, aminoalkyltrialkoxysilanes, oxyethylated fatty acids, and alcohols, esters, of water-soluble acids such as acetic. 3. Glass fibers according to clauses 1 and 2, characterized in that they comprise on the surface 5 to 95% by weight, based on the weight of the fibers of the thermoplastic composition, of polymers of vinyl and / or olefinic monomers such as polyvinyl chloride and a polymer of ethylene-vinyl acetate. Severografia, n. P., Závod 7, Most Price 2,40 Kcs