CS259603B1 - Glass enameling agent - Google Patents

Abstract

A mineral oil-based enamel cutting agent, characterized in that it contains 0.5 to 15 parts by weight of hydrophilic-type surfactants with a hydrophilic-lipophilic equilibrium constant of 3 to 8 and 99.5 to 85 parts by weight of mineral oil with a viscosity of 1.0 to 60 mm2. .s-i at SOT.

Description

When processing glass products (cast, drawn or pressed), an important technological operation is cutting by a tool made of carbide or special materials. During cutting, the enamel surface structure is disrupted, allowing separation at the cutting line. However, there is often a significant stress in the enamel surface layer (especially in incompletely tempered products), which results in the formation of micro-cracks and splinters of a part of the material around the cut to a fracture outside the cut line, causing a significant reduction in product quality.

One of the ways in which the above-mentioned defects are eliminated is by lubricating the cutting point, for example with kerosene. Lubrication of the cut by oil fraction results in the adhesion of the lubricant to the edges of the cold cut material, the cut thus lubricated is not completely free from the mentioned defects and during subsequent storage the individual products (eg sheet glass) are glued. product.

The above-mentioned disadvantages of the hitherto known methods are eliminated by the enamel cutting agent according to the invention, which consists of 0.5 to 15 wt. parts of surfactants of slightly hydrophilic type with a hydrophilic lipophilic balance (HLB) constant of 3 to 8 and 99.5 to 85 wt. min. oils with a viscosity of 1.0 to 60 mm ² . . with ¹ at 50 ° C.

Suitable surfactants of the slightly hydrophilic type with the HLB 3 to 8 constant are, for example, hydrophilic types of hydrophilic-lipophilic balance (HLB) values of oil-miscible values of 3 to 8, in particular of the nonionic type based on oxyethylenates or oxypropylenates or ED / PO copolymers fatty alcohols, fatty acids, alkylphenols, fatty amines, aliphatic, respectively. aliphatic-aromatic mercaptans having a number of C-atoms in the alkyl of 12 to 18, respectively. 7 to 11 in optionally alkylaromatic substances having a bound ethylene oxide content of 2 to 7 moles per mole of starting hydrophate, respectively. 1 to moles of propylene oxide or said proportions of the two alkylene oxides sequentially bound to the starting hydrophate, the surfactant content in the oil being in the range of 0.5 to 15% by weight.

Possible mineral oils are, in particular, oils having a viscosity of 5 to 40 mm ² . s at 50 ^{C 1} C, particularly disadvantageous as mineral oil with a viscosity of 30 to 32 mm ^2nd S ¹ at 50 ° C. The viscosity of the glass cutting composition of the invention is preferably in the range of 15 to 35 mm ² . s ^-1 at 50 ° C.

The following examples illustrate the invention and are not intended to limit the invention in any way.

Example 1

Ointment-based surfactant. of an alcohols containing C 2 -C 18 (saturated and unsaturated chains) with 3 to 7 moles of bound ethylene oxide (trade name Slovasol SF 3) - 6 wt. parts and mineral oil with a viscosity of 29 mm ² .s ^-1 at 50 ° C - 94 wt. parts. Example 2

Nonylphenol surfactant with 3 to 8 moles of ethylene oxide (Slovasol 903) - 10 wt. parts and mineral oil with a viscosity of 31 mm ² . S ¹ at 50 ° C - 90 wt. parts.

Example 3

C12-C18 fatty acid surfactant with 3 to 8 moles of ethylene oxide (Slovaviv SG) - 4 wt. parts and mineral oil with a viscosity of 30 mm ² , s ¹ at 50 ^° C - 96 wt. parts.

Example 4

Alcohol-based surfactant containing C12-C18 carbon atoms with 3 to 7 moles of bound ethylene oxide (Slovasol SF 3) - 2 wt. parts and mineral oil with a viscosity of 28 mm ² . . s ^-1 at 50 ^C G (bearing oil J3) - 98 wt. parts.

Claims (2)

CLAIMS 1. A mineral oil-based enamel cutting agent comprising 0.5 to 15 wt. parts by weight of hydrophilic type surfactants having a hydrophilic lipophilic balance constant of 3 to 8 and 99.5 to 85 wt. parts of mineral oil having a viscosity of 1.0 to 60 mm ² . . s ^-1 at 50 ° C. 2. A composition according to claim 1, characterized in that it comprises as mineral oil an oil having a viscosity of 30 to 32 mm @ ² s ^-1 at 50 DEG C. and a surfactant referred to in point 1.