CS247795B1

CS247795B1 - Material for short-term protection of plants',machines' and vehicles' surfaces

Info

Publication number: CS247795B1
Application number: CS727484A
Authority: CS
Inventors: Jan Sequens; Ludvik Bezdecka
Original assignee: Jan Sequens; Ludvik Bezdecka
Priority date: 1984-09-27
Filing date: 1984-09-27
Publication date: 1987-01-15

Abstract

Hmota umožňuje po aplikaci nátěrem nebo nástřikem vytvoření ochrenné vrstvy na povrchu strojů zařízení nebo vozidel, která tyto plochy chrání před spadem pevných exhalátů a před běžnými atmosférickými srážkami. Skládá se z I až 10 hmotnostních dílů zahuětovedla na bázi vodorozpustných derivátů celulózy nebo ěkrobu, I až 20 hmotnostních dílů vodné kompozice pojivové látky, například disperze termoplastického polymeru nebo vodného koloidního roztoku oxidu křemičitého a s výhodou obsahuje 0,1 až 2 hmotnostní díly hydrofobika; zbytek do 100 % hmotnostních dílů tvoří voda. Vrstva se v případě potřeby dá snadno odstranit pomoci studené nebo teplé vody tlakové bez přídavku detergentů.The mass allows for application after application or by spraying to form a protective layer on the surface of equipment machines or vehicles which protects these areas from fallout solid exhalates and conventional atmospheric precipitation. It consists of I to 10 weight parts based on the base water soluble cellulose derivatives; \ t 1 to 20 parts by weight of aqueous a binder composition, for example a thermoplastic polymer dispersion or aqueous colloidal silica solution and preferably contains 0.1 to 2 parts by weight of hydrophobic; the rest to 100% by weight of water is water. The layer can be easily added if necessary remove with cold or hot water pressure-free without detergents.

Description

247795 2 The aforementioned short-term protection of surfaces provided with a lacquer or enamel coating can be readily realized by applying a protective layer of the composition according to the invention, the principle being that it is formulated as an aqueous composition comprising: 1 to 10 parts by weight of a water-soluble cellulose ether or starch ether derivative, 1 to 20 parts by weight of an aqueous binder composition, for example a thermoplastic polymer dispersion such as PVAc, VAc-acrylate copolymer, styrene-acrylate, silicone-acrylate similarly, by sieving 30 to 70% by weight, or an aqueous silica colloidal solution of 17 to 45% by weight, or a combination thereof, and preferably containing the protective layer of the protective layer. in addition, 0.1 to 2 parts by weight of hydrophobic, for example based on alkylsilanolates, stearic acid salts and the like, and the remainder being 100 parts by weight of water.

The composition of the present invention, after application to the surface of the surfaces, e.g., finished surface, which can be degraded by the fallout of solids, provides tgmtoploches with protection against this fall, and after the need for this protection, the protective film can be easily removed by washing with a jet of pressurized water with moderate mechanical action. this material can be found, for example, in the temporary protection of painted car body surfaces, shut down during repairs in open car parks or in sheltered areas of machinery or equipment temporng stored in outdoor landfills before being installed in a covered space. Upon termination of the protection, this layer can be easily removed by using cold or hot water, preferably under high pressure (about 5 MPa), not hot or steam, without the addition of any detergents, alkali and the like, with occasional use of a fine polyamide fiber brush or bg washing lines, e.g. with rotary brushes.

The method of using the mass of the present invention is in the following examples. Example 1 In the production of passenger cars, various defects in the produced vehicles are detected during the final inspection. These cars, for which a repair is required, are returned to the production line or to a special repair line to return to the final inspection after repair. For organizational reasons, it is necessary for such a car to return to the line after a techno-logical advance of a few hours to days. During this time the car is parked in an open car park. As the bodywork finish is still immature, it has a short-term spray protection over the weaning period of the following composition: carboxymethylcellulose 3 parts by weight aqueous dispersion of vinyl acetate by drying about 55% 7 parts by weight of sodium methyl silanolate 2 parts by weight water 68 Weight Parts Prior to repair, the protective film was removed on a roller rotary brush wash line. Example 2

During the construction repairs of the production hall, it was necessary to temporarily place a production facility equipped with a synthetic enamel coating outside the building in an open space. Prior to weathering and exhalation, these surfaces were coated with a protective layer of the following composition:

Claims

3 247795 Hydroxyethylcellulose 1.5 parts by weight aqueous dispersion of styrene-ethylene copolymer with dry matter approx. 51% by weight hydrophobic based on mixed alkylsilanolates sodiumwater 5 parts by weight 1.5 parts by weight92 parts by weight The protective film was removed with a high-pressure washer before repositioning the equipment water at an average temperature of about 45 ° C. At less accessible places - corners, cavities - a polyamide fiber brush was used to accelerate. Example 3 A transformation device equipped with a synthetic paint coating had to be left open for a period of 0 days before being placed in the transformation station for organizational reasons. For this time, the surfaces coated with a protective coating, sprayed with paint, were of the following composition: carboxymethyl starch 3 parts by weight aqueous colloidal silicon dioxide solution 30% by weight. 10 parts by weight water 87 parts by weight Before the transformer was placed in the station, the removal of the protective device was first carried out by soaking the film with water spray and then softening the film with water pressure from the high pressure washer. The composition of the invention can be used, in particular, in engineering, automotive and other industries, where it will contribute to improving product quality and reducing manufacturing costs. BACKGROUND OF THE INVENTION A material for the short term protection of surfaces of equipment, machines or vehicles from fallout of solid lintels and from conventional atmospheric precipitation based on cellulose derivatives or starch and thermoplastic polymers, characterized in that it comprises from 10 to 10 parts by weight of a cellulose ether or starch ether derivative water soluble, for example, carboxymethyl cellulose, hydroxyethyl cellulose, carboxymethyl starch 8 similarly, 1 to 20 parts by weight of an aqueous binder composition, for example an aqueous thermoplastic polymer dispersion such as vinyl acetate or styrene-acrylate copolymer with a dry weight of 30-70%, aqueous colloidal silica solids 17 to 45% by weight and preferably further comprising 0.1 to 2 parts by weight of hydrophobics, for example based on alkylsilanolate, salts of stearic acid and the like and the remainder to 100 parts by weight is water.