DD135288B1 - INCORRECTING AGENTS FOR HARD SURFACES, PREFERABLY PLASTIC PLATES FROM POLYESTER RESINS - Google Patents

Description

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Field of application of the invention

The invention relates to a cleaning agent, the hard heavily soiled surfaces, preferably glass fiber reinforced unsaturated polyester plates, but also surfaces of glass, ceramic, metal u.a., automatically cleans without acting aggressively.

Characteristic of the known technical solutions

Detergents for heavily soiled surfaces, such as glass and ceramic building covers and cladding, are known. Thus, for example, in DDR Patent No. 79,360 an aqueous universal cleaning agent is described which contains in addition to 0.6 % of hydrogen fluoride alkylarylsulfonic acid and / or alkylsulfonic acid, orthophosphoric acid, oxalic acid and oxyethylated as a corrosion inhibiting substance alkylphenols. Despite the relatively low content of hydrogen fluoride occur in glass fiber reinforced unsaturated polyester plates, which are preferably used to cover greenhouses on their surfaces and on the hot-dip galvanized steel structures on corrosion phenomena.

Also an in-trade automatic cleaners for greenhouse areas of glass / hydrogen fluoride content] showed the use of said polyester plates with which greenhouses, Dar ünmit t ^ Ibars.i were covered iJähö a Kraf tvverkss so severe corrosion phenomena that the plates have a Weight loss suffered (see test results) and were heavily roughened. In addition, the light transmission of the plates from 44.0 % in the uncleaned state to 49.0 % after an exposure time of up to 30 minutes for optimal plant growth (at least 53 %) was not enough.

Testing the chemical resistance of polyester plates compared to a commercial glass cleaner (commercial product "Landlob-Glasputz" 3.Schaecker, Leipzig)

weight loss

Sample no. Dwell time of the sample in the glass cleaner (min) 1 15 2 30 3 60 4 180

0,92 0,95 1,20 1,32

The testing of a liquid facade cleaner (commercial product "Domal" of VEB Stadium), which contained no hydrogen fluoride but phosphoric acid, detergent, glycol and water, with an application concentration of 45% after 30 min exposure time also showed only an insufficient increase in light transmission of 44 % in uncleaned state to 50.4% "after cleaning.

The numerous hard-surface cleaners described in patent literature have already shown in their composition that they would either be too aggressive for their use on glass fiber reinforced unsaturated polyester sheets, or that the very intense fly ash deposit on greenhouses near large power plants could not be removed (3RD-0S No. 2 524 260;

BRD-OS No. 2 507 156; BRD-OS No. 2 448 008; BRD-OS No. 2 359 095; BRD-OS No. 2 313 904; FRG-OS 2 345 696; U.S. Pat. No. 3,793,221; U.S. Pat. No. 4,009,115).

Object of the invention

The aim of the invention is to provide a cleaning agent for hard, heavily soiled surfaces, preferably for glass fiber reinforced unsaturated polyester resins, but also for metal, ceramics, glass and the like, which does not corrode and in the temperature range from 10 to 35 ⁰ C can be used.

Explanation of the essence of the invention

This object is achieved by a cleaning agent consisting of an aqueous solution of known surface-active agents, phosphoric acid and 3etaine-structure organic charge-balancing substances. The individual constituents can be combined in the following limits (parts by weight):

1 to 6 parts by weight of polyglycol ether with 5 to 20 alkylene oxide

Units of alkylphenols having 8-14 C atoms in the side chain, of fatty alcohols having 10 to 16 carbon atoms and of technical fatty alcohol mixtures which were prepared by selective reduction of fatty acid mixtures with a high proportion of unsaturated acids to obtain the double bonds and averaged 16 to 18 carbon atoms

1.5-6.5 parts by weight of alkylarylsulfonic acid and / or alkane

sulfonic acid or its alkali metal salts

phosphoric acid

organic charge-balancing substance with betaine structure

Viscosity increasing agent water

5 - 10 Ge w . Parts 1 - 3 Ge w . Parts 1 - 4 Wt. parts rest

The total concentration of all components in the aqueous solution is preferably in the range of 13 to 17%. The content of organic substance with 3etainstruktur should not exceed 2.5 % and at least 1 % ·

Examples of nonionic oxalkylated products which can be used are:

- Oxyethylated fatty alcohol mixture with 9 ÄO units and a chain length of C ₂ to Cg

- Oxyethylated nonylphenol with 9 ÄO cinheiten

- Oxyethylated oleyl / cetyl alcohol with 5 ÄO units

- Oxyethylated tetradecanol with 9 to 10 AO units

- Oxpropylated tetradecanol with 9 PO units

- Oxyethylated oleyl alcohol with 8 to 15 ÄO units

- oäthylierter coconut fatty alcohol with 9 ÄO units, consisting of a mixture of fatty alcohols with a chain length of C _Q to C.

oxyethylated fatty alcohol mixture with 3 to 15 AO units, which was obtained by selective reduction of sunflower fatty acids to obtain the double bonds

As anionic surfactants or their alkali metal salts can be used:

Alkylbenzenesulfonic acid (alkyl: C_, _Q -C ₁₄ )

Alkanesulfonic acid (alkyl: Cp - С-),

The use of the quimethylaminomethane · bisphosphonic acid of the formula ## STR3 ## has been particularly favorable .

/ V- Ch ,

As a charge-balancing compound on the glass fiber reinforced polyester surface proven · In addition, substituted alkylated aminopolycarboxylic acids can be used, such as "B.

- o "- (N-alkyl-N-dicarboxymethylamino) succinic acid having an alkyl chain length of from C to C.

- ^ - (N-alkyl-N-carboxymethylamino-succinic acid having an alkyl chain length of C to C ₂

- ^ / - (N-alkyl-N-dicarboxymethylaminoJ-propane tricarboxylic acid having an alkyl chain length of Cg to C ₂₀ or with ^C ₁₆ / ^G _1S ~ alkyl radicals from technical mixtures

"jC - (N-alkyl-N-carboxymethyl- amino-propane tricarboxylic acid having an alkyl chain length of C_ to C ^ ₈ or ^c i _S / ^c ₁₈ " alkyl radicals from technical mixtures

- flC - (N-Alkyloxyäthoxyäthy1-N-dicarboxyraethylamina) succinic acid having an alkyl chain length of C _Q to C ₂₀ or with

C g / C g-alkyl radicals from technical mixtures --X / - (N-alkyloxyethoxyethyl-N-caгboxyme-thylamino) succinic acid having an alkyl chain length C ₀ to C 11 or CVC ₁

o χα Io

Alkyl radicals from technical mixtures

- & C - (N-Alkyloxypolyäthoxyäthy1-N-dicarboxymethylamino) succinic acid with an alkyl chain length of C _Q - C_ _o or with С. ,. / С ,, _Q- alkyl radicals from technical mixtures

Io Io

- Q ^ - (N-Alkyloxypolyäthoxyäthy1-N-carboxymethylamino) succinic acid having an alkyl chain length of C to C or Cg / Cg alkyl radicals from technical mixtures.

Carboxymethylcellulose or highly dispersed polysilicic acids which are stable in the acidic medium serve as viscosity-increasing agents to increase the residence time of the cleaning agent on the surfaces to be cleaned.

The cleaning agent according to the invention causes not only an automatic cleaning heavily soiled glass, ceramic and metal surfaces, but surprisingly also the covers of greenhouses, which preferably consist of glass fiber reinforced unsaturated polyester plates. So far, satisfactory cleaning of these plastic surfaces with aqueous cleaning agents has not been achieved. The galvanized steel profiles which carry the covers, as well as the sealing and fastening elements, are produced by the invention

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Medium not attacked. Oa the individual components are used only in low concentrations, environmental damage does not occur.

embodiment

In the following a cleaning attempt is described. To clean was a covered with polyester plates greenhouse near a large power plant. The cleaning agent (see composition 1) was first sprayed thinly onto the plates. After about 10 minutes, a second spraying was carried out to dampen the agent on the plate surface during the exposure phase (25-30 minutes). Thereafter, the dissolved dirt was hosed off the plates by means of a water hose. Immediately before the cleaning attempt and then the illuminance quotient was determined at marked measuring points in the greenhouse. The cleaning of a 20 m wide strip resulted in an increase in illuminance of 13-15 % compared to the uncleaned condition of the greenhouse (see table). The required amount of cleaning solution

2 for a surface of about 5400 m about 1000 1 with two spraying.

Table:

Cross section illuminance quotient cleaning effect

\ / Qj \ / 0)

cleaned unpurified

Outer Ship 40.7 53.8 13.1

Nave 38.0 53.2 15.2

The cleaning agent may for example be composed of the following constituents:

Composition 1)

3.0 parts by weight Oxyethylated fatty alcohol mixture with S AO units and a chain length of C ₂ to C

3.3 parts by weight Alkylbenzenesulfonic acid (alkyl: C _Q to C) 1.5 parts by weight. Dimethylaminomethane bisphosphonic acid 5.5 parts by weight. Phosphoric acid 2.0 parts by weight. Carboxymethylcellulose water

Composition 2)

3.0 parts by weight of oxyethylated nonylphenol having 9 ÄO units 3.0 parts by weight of sodium alkanesulfonate (alkyl: C " _o to C" _Q )

1.5 parts by weight Dimethylaminomethane bisphosphonic acid 6.0 parts by weight. phosphoric acid

2.0 parts by weight carboxymethylcellulose

Rest of water

Composition 3)

3.0 parts by weight Oxyethylated fatty alcohol mixture with 9 ÄO units and a chain length of C ₁₂ to C ₁₈

3.0 parts by weight Na-Aikyibenzolsulfonat (alkyl: C ₁₀ to C ₄ ) 2.0 Gew. - T, '^' - (N-Dodecyl-N-DicarboxymethylaminoJbernstein '

acid

6.0 parts by weight Phosphoric acid 2.0 parts by weight. Carboxymethylcellulose balance water

Composition 4)

3.0 parts by weight of oxyethylated nonylphenol having 9 units of 3.0, 3.0 parts by weight. Alkylbenzenesulfonic acid (alkyl: C _Q to C ₄ ) 1.5 parts by weight. Dimethylaminoraethanbisphosphonsäure

5.0 parts by weight Phosphoric acid 2.0 parts by weight. highly dispersed polysilicic acid residue water

Composition 5)

3.0 parts by weight Oxyethylated fatty alcohol mixture with 9 AO units and a chain length of C "to C ₁₈

3.0 parts by weight Na alkylbenzenesulfonate (C ₁₀ to C) 2.0 parts by weight. 2- (N-dodecyl-N-dicarboxymethylamino) propantri-

carboxylic acid-1,2,3, 6 parts by weight Phosphoric acid 2.0 parts by weight. Carboxymethylcellulose balance water.

Claims (3)

- е- claim of invention 1, hard surface cleaners, preferably plastic sheets of glass fiber reinforced unsaturated polyester resins, which consists of a aqueous solution of surfactants, phosphoric acid and organic charge balancing substances and optionally other customary components of such cleaners, characterized by containing it as the content to surfactants, a mixture of 1 to 5 wt .- % polyglycol ether rait 5 to 20 alkylene oxide units of alkylphenols with 8 to 14 C atoraene in the side chain, of Rettaikoholen with 10 to 15 carbon atoms and technical Fialialkoholgemischen by selective reduction of Fettsäuregeiuischen with high proportion of unsaturated acids to give czr double bonds were prepared and have an average of 16 to 18 carbon atoms and 1.5 to 5.5 wt -% alkylarylsulfonic unG / or alkanesulfonic acid or their alkali metal salts, of phosphoric acid 5 to 10% by weight, to an organic charge-balancing substance, the betaine structure is from 1 to 3% by weight of cimetylaminomethane bisphosphonic acid or substituted alkylated arabicarboxylic acid and additionally having from 1 to 4 parts by weight of viscosity-increasing agent, wt.% carboxymethylcellulose or semi-acidic polyurea. 2, cleaning agent according to item 1, characterized in that the total concentration of all constituents in the aqueous solution is 13 to 17 Gev / x. 3, cleaning agent according to items 1 and 2, characterized in that the content of the organic charge-compensating substance with setaine structure is between 1 and 2.5% by weight; _ü amounts.