CS259292B1 - Pelyvinyl acetate lubrication for glass fiber treatment - Google Patents

Abstract

The essence of the solution is a composition consisting of 0.7 to 2% by weight of dry matter of polyvinyl acetate dispersion, 0.1 to 0.8% by weight of quaternary oxyethyl fatty amines with 5 to 5 moles of ethylene oxide, 0.05 to 0.4% by weight of dry matter of unsaturated binders and the remainder up to 100% by weight of water. In case of need for pH regulation, this can be done by adding 0.01 to 0.3% by weight of acetic acid. Modified glass fibers are suitable for reinforcement of unsaturated polyester resins.

Description

The present invention relates to a polyvinyl acetate lubricant for treating glass fibers for reinforcing unsaturated polyester resins.

With the continuous growth of fiberglass-reinforced plastic production and the development of fiberglass production technology, the development of fiber finishes is closely linked. The use of different treatments can affect not only the fiber processing technology, but also the mechanical, electrical and optical properties of fiberglass.

In the production of polyester fiberglass, the solubility of the surface treatment of the glass fibers in the laminating resin, more particularly in its monomeric solvent, most often in styrene, plays a major role. This affects not only the speed and quality of the glass reinforcement, but also the transparency of the fiberglass.

For these reasons, they have found widespread use of polyvinyl acetate dispersions whose emulsion polymerization is carried out in the presence of specific emulsifiers or protective colloids (cf. no. 162 472, 189 240, 197 045 and 218 085) so that glass fibers can be used to production of transparent laminates.

Although there are ongoing efforts to use other film-forming substances, mainly polyester resins (cf. aut. Ref. 109 169, 176 378) and alkyd resins (c. Aut. Ref. No. 222 882), the use of polyvinyl acetate dispersion lubricants! is constantly up-to-date, mainly for economic, ecological and health reasons, because in their application workers coming into contact with lubrication have at least problems with contact dermatoses. Eczema causes workers to be transferred to another workplace or not to come into direct contact with ingredients that cause allergic hypersensitivity.

Depending on the application of the inclined fibers, polyvinyl acetate lubricants contain a number of additives, whether plasticizers such as dibutyl phthalate (cf. No. 160,598), specific surfactants, lithium chloride and the like. (MS. Auto-enlightenment No. 173 131). In view of the simplification of these compositions, efforts are made to use additives that fulfill a more functional function.

In the application research, we have found that the above conditions fully control the lubrication of the invention.

The present invention provides a polyvinyl acetate lubricant for treating glass fibers for reinforcing unsaturated polyester resins.

The essence of the solution consists in that it consists of 0.7 to 2% by weight of dry matter of the polyvinyl acetate dispersion, 01, to 0.8% by weight of quaternary oxyethylated amines of the general formula

Where R is an alkyl or alkenyl radical having 8 to 18 carbon atoms, x + y being 5 to 25, in a polyvinyl acetate: quaternary oxyethylated amine weight ratio of 1: 0.14 to 0.40, 0.05 to 0.4 pere. the dry weight of the unsaturated binders and the remainder up to 100% by weight of water. If desired, whether for pH control or as a catalyst for the hydrolysis of the binding agents, it may contain 0.01 to 0.3% by weight of acetic acid.

A variety of known polyvinyl acetate dispersions may be used to prepare the lubricants, preferably prepared e.g. podfa čs. aut. lighting. no. No. 218,085, the film of which is well soluble in a solution of an unsaturated polyester resin. Due to the established bactericidal, deodorant and anticorrosive properties, the quaternary oxyethylated amines have a positive effect on the lubrication properties of fibers and their application. Good and sufficient surfactant properties make it unnecessary to add additional surfactants, wetting agents or lubricants to the lubrication. In addition to these properties, we have found that the quaternary oxyethylated amines used in the weight ratio to polyvinyl acetate also have a significant effect on the plasticization of the polyvinyl acetate, allowing the fibers to have a pleasant feel even without the use of wetting agents. for the production of mats. Reduced dustiness and improved antistatic properties of the fibers in addition to saving raw materials such as lubricants and antlstatics have a positive impact on the work environment.

Unsaturated binder compositions are known and are compounds capable of copolymerizing with an unsaturated polyester resin.

As a rule, they contain a functional group of vinyl, allyl, styrene, acrylic or methacrylic and can be used either singly or in combination.

The invention is further illustrated by way of example: v.

Example 1

Lubrication was prepared as follows. To 1/3 of the water required for the preparation was added 0.05% by weight acetic acid and with stirring 0.1% by weight 3-methacryloxypropyltrimetaxysilane was added. After 30 minutes, 0.1 wt. cationic silane (dry matter 50% by weight) of the formula

CH _} ©

CH 3 COOICM-Cachh-Cl

0.3 wt. dimethylsulfate quaternized stearylamine with 7 moles of ethylene oxide, 2.5% by weight of polyvinyl acetate dispersion (dry matter 55% by weight) and the composition was made up to the specified amount with water. The prepared lubrication has a pH of 4.75, a surface tension of 41 mN. m ^-1 at 20 ° C.

Example 2

To 1/3 of the water required to prepare the lubrication was added 0.2% by weight of cationic silane (dry matter 50% by weight) of formula θ

CH 2 Cl 2 CH 2 Cl 2 N 2 Cl 2/2 Cl

0.2% by weight of quaternized stearylamine oxyethylated with 7 moles of ethylene oxide, 2.5% by weight of polyvinyl acetate dispersion (dry matter 55% by weight) and the composition was made up to the specified amount with water. The prepared lubrication has a pH of 6.9, a surface tension of 40.8 mN. m ^-1 at 20 ° C. Example 3

0.1% of acetic acid and 0.3% of vinyltris (methoxyethoxyjsilane) were added to 1/3 of the water needed to prepare the lubrication. After 20 minutes, 0.4% by weight of a quaternized C ₈ to C ₁₈ fatty amines mixture was oxyethylated. moles of ethylene oxide and 3% by weight of the polyvinyl acetate dispersion (dry matter 55% by weight of the composition was made up to the specified amount with water. The prepared lubrication had a pH of 4.1, a surface tension of 42.2 mNr ^-1 at 20 ° C. and Examples 1, 2 and 3 were used to treat glass fibers with an average thickness of 11 μτα, whose original strand with 400 elemental fibers was divided into four parts. and the results are shown in the table.

lubrication transparency (° / o T / s)

2S9292

table

1 61/15 70/30 75/45 79/60 80/60 81/120 2 62/15 71/30 75/45 80/90 81/90 82/120 3 60/15 70/30 73/45 77/60 79/90 80/120

SUBJECT

Claims (2)

Polyvinyl acetate glass fiber lubrication for the reinforcement of unsaturated polyester resins, characterized in that it comprises from 0.7 to 2% by weight of the polyvinyl acetate dispersion dry weight, 0.1 to 0.8% by weight of the quaternary oxyethylated amines of the general formula CH '; I N I Wherein R is an alkyl or alkenyl radical of 8 to 18 carbon atoms, x + + y is 5 to 25, in a polyvinyl acetate: quaternary oxyethylated ratio by weight of 1: 0.14 to 0.40, 0.05 to 0.4 % by weight of the dry matter of unsaturated organosilicon based compositions and the remainder to 100% by weight of water. 2. The polyvinyl acetate lubricant according to claim 1, characterized in that it contains 0.01 to 0.3% by weight of acetic acid.