CS271996B1 - Lubrication for glass fibres treatment - Google Patents

Abstract

Lubrication consists of 1 to 7% the dry weight of vinyl acetate based dlsperzle and its copolymers, 0.05 to 0.5% weight of maleinsilane, 0.01 to 1% by weight of antistatic Sinidiela residue to 100% by weight of water. Treated fibers are suitable for reinforcing plastics, mainly polyester bitumen.

Description

The present invention relates to a lubricant for treating glass fibers, particularly suitable as a reinforcement composition. based on unsaturated polyester resins. .

In the production of polyester fiberglass, the solubility and wettability of the surface treatment of the glass fibers in the laminating resin, more specifically in the monomeric solvent, most often in styrene, play a major role. This affects not only the speed and quality of pre-lamination of the glass reinforcement, but also the resulting transparency of the polyester fiberglass. Aqueous lubricating compositions used for this purpose generally consist of film-forming agents, binders, wetting agents, lubricants and antistatic agents. Use of homopolymers and / or copolymers of vinyl acetate in the form of dispersions! as film-forming substances for lubrications is constantly up to date, mainly for economic, ecological and health reasons. Emulsion polymerization ea usually takes place in the presence of Specific Emulsifiers or protective colloids (Czechoslovak Autos. No. 162,472, 189,240, 197,045 and 218,085), so that the glass fibers can also be used for the production of transparent polyester fiberglass (Nos. 160,598 and 173,131).

During the application research of doe, they found that a number of application properties can also be regulated by using silanes, which also perform the function of a binding agent with a positive impact on wettability.

The invention describes a lubricant for treating glass fibers, particularly suitable as a reinforcement composition! based on unsaturated polyester resins. The essence of the invention is that the lubrication es consists of 1 to 7% by weight of dry matter of the dispersion based on homopolymers and / or copolymers of vinyl acetate, 0.05 to 0.6% by weight of maleinsilanes of the general formula

HOOCCH = CHCONH (C ₂ H ₄ NR ₂ ) _x C ₃ H ₆ Si (OR ₁ ) ₃ , kds represents R 2 methyl! or style, R _{2 is a} hydrogen atom or a residue of the structure -COCH CHCOOH, x is 0 or 1, 0.01 to 1% by weight of antistatic agents! such as lithium chloride, ammonium chloride and / or cationic nitrogen derivatives and the residue up to 100% by weight of water. If necessary, mainly from the technology for the production and processing of composite fibers, the lubrication may contain 0.001 to 1% by weight of at least one additive from the group of pH regulators, binders, lubricants and wetting agents such as acids, methacrylsilanes, aminosilanes, benzides, esters and polyethylene glycols. The control of textile and application fibers can be controlled by adding 0.5 to 4% by weight of dry matter of polyester dispersions.

The stage lubrication of the invention is particularly suitable for the treatment of glass fibers used as a reinforcement for unsaturated polyester resins. It is characterized by high storage stability, which allows you to prepare larger amounts of lubrication without negatively affecting its quality. Compared to known lubrications, the presence of maleic silanes improves a number of performance properties of glass fibers such as increasing the tensile strength, increasing the polarity of the fiber surface with a significant effect on reducing lubrication migration and reducing dustiness in textile fiber processing. .

The maleilanes according to the invention can be added directly to water in the preparation of lubricants, either in concentrated forms or in the form of solutions. In addition to these possibilities, they can be prepared by preparing the appropriate aminosilanes such as 3-aminopropyltriethoxysilane, 3- (2-aminoethyl) aminopropyltrimethoxysilane with malic anhydride when preparing lubrications. The addition can be carried out in various water-soluble organic diluents such as various alcohols and glycols. In the case of immediate use for the production of lubrication, we have found that the addition can also be carried out in water. After all, the raw materials according to the invention are known and commercially available. From polymer dispersions! polyvinyl acetate alone and copolymers of vinyl acetate with butyl acrylate, 2-styloxyacrylate and dibutyl maltinate are of the utmost importance. In the case of applications of glass fibers for the production of highly transparent polyethylene fiberglass laminates, it is necessary to select polymer dispersions so that polyvinyl alcohol, which is a separator of unsaturated polyester resins, is not used as a protective colloid in their production.

The invention is further elucidated in the form of examples, in which the composition is given in a concentration by weight.

Example 1

To a vessel equipped with a stirrer ea was added 2 L of water and 5 g of a surfactant based on a block ethylene oxide-propylene oxide copolymer having an average molecular weight of 3,000 with a bound ethylene oxide content of 40%. In the second vessel, a malesilane of formula was prepared

HOOCCH - CHCONHC ₃ H ₆ Si (OC ₂ H ₅ ) ₃ by mixing 7 g of 3-aminopropyltriethoxysilane with 3 g of maleic anhydride in 70 ml of water for 25 minutes. The maleic silane solution was added to the surfactant solution together with 5 g of 3-methacryloxypropyltrimethoxyailane. After 15 minutes, 5 g of laurylamidoethylpyridinium chloride, 20 g of lithium chloride, 300 g of polyvinyl acetate dispersion (dry matter 55%) were added and the lubrication was made up to 10 l with water. The prepared lubrication has a pH = 6.24 and a surface tension of 29.5 mN. m ^-1 at 20 ° C, Distribution or sedimentation of the lubrication was not observed even after 2 days of standing. The glass fibers by this lubrication are suitable for the production of strand mats suitable as reinforcement for unsaturated polyester resins.

Example 2

Lubrication was prepared according to the procedure of Example 1, except that instead of the polyvinyl acetate dispersion, an equivalent amount of a copolymer dispersion based on vinyl acetate with dibutyl maleate (dry matter 52½) was used. The prepared lubrication has a pH = 6.10 and a surface tension of 31.2 mN.m ^-1 at 20 ° C. Glass fibers with a lubrication coating of 0.34% are suitable for the production of transparent polyester laminates.

Example 3 30 g of water ea with stirring were added 30 g of a lubricant based on aminoamide oleic acid with diethylenetriamine solubilized with acetic acid in the form of 12.5% emulsion, 80% maleinsilane of formula

HOOCCH = CHCONHC-H.NHC-H.Si (OCH -) - λ 4 3 O 3 3 in the form of a solution in isopropyl alcohol (dry matter 50%), 15 g of dimethyl sulphate quaternized sterylamine oxyethylated with 7 mol of ethylene oxide and 900 g of copolymer dispersion as in Example 2. The prepared lubrication has a pH = 5.8 and a surface tension of 29.8 mN.m ^-1 at 20 ° C. Glass fibers with a coating of 0.84% are suitable for the production of roving coils used for the production of mats during their processing into roofing.

Example 4

Lubrication was prepared according to the procedure as in Example 3, except that 300 g of polyester emulsion (dry matter 40%) were added. The prepared lubrication has a pH = 5.2 and a surface tension of 30.1 mN.m ^-1 at 20 ° C. Glass fibers with a coating of 1.16% are suitable for the production of rovings for the production of fiberglass by spraying technology.

Claims (3)

OBJECT OF THE INVENTION 1. Lubricants for the treatment of glass fibers, especially suitable as a reinforcement composition! based on unsaturated polyester resins, characterized in that it consists of 1 to 7% by weight of dry matter of a dispersion based on homopolymers of s / slsbo copolymers of vinyl acetate, 0.05 to 0.6% by weight of maleinsilanes of the general formula HOOCCH - CHCONH (C ₂ H ₄ NR ₂ ) _x C ₃ H ₆ Si (OR ₁ ) ₃ , where represents methyl or ethyl, R ₂ is a hydrogen atom or a residue having the structure -COCHyCHCOOH, x is 0 or 1, 0.01 up to 1% by weight of antistatic agents. such as lithium chloride, ammonium chloride and / or cationic nitrogen derivatives with a residue up to 100% by weight of water. 2. Lubricants for treating the glass fibers of stage 1, characterized in that they contain 0.001 to 1% by weight of at least one additive from the group of pH regulators, binders, lubricants and wetting agents such as acids, methacrylsilanes, aminosilanes, surfactants, esters, polyethylene glycols. . . 3. Lubricating treatment of the glass fibers of the stage of points 1 and 2, characterized in that it contains 0.5 to 4% by weight of dry matter of the polyester dispersion.