CS202809B1 - Hardenable material based on unsatureted polyester resin for hardening geologic preparates - Google Patents

Description

DESCRIPTION OF THE INVENTION OF THE CZECHOSLOVAK SOCIALISTIC CERTIFICATE

REPUBLIC (13) 202809 6 / (11) (El)

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DISCUSSIONS (51) Int C1.3C 08 L 87/06 (22) Registered 08 11 78 (21) (PV 7206-78) (40) Published 30 05 80 (45) Published 15 03 82 (75)

THE INVENTOR PARMA ZDENEK AND BURDA JAROSLAV, LIBEREC (54) Hardenable Unsaturated Polyester Resin Compound for Reinforcing Geological Preparations

The present invention provides a curable mass based on unsaturated polyester resin for reinforcing geological preparations.

The materials currently used to reinforce geological specimens do not meet several aspects. For example, polyester resins have an inappropriate refractive index, high viscosity and poor penetration properties. Epoxy resins have an unsuitable refractive index, high viscosity and poor penetration properties and poor polishability. The Canadian balm has a high viscosity and poor penetration properties, low tack and high vacuum instability, such as electron microanalysis. An overview of the basic properties of the aforementioned materials and their applicability for strengthening geological preparations is given by Z. Táborský's "Utilization of Czechoslovak Synthetic Resins for the Preparation of Microscopic Preparations" 1973, Časo-pis for Mineralogy and Geology, vol. 18, No. 4/1973.

These disadvantages are largely removed by the unsaturated polyester resin composition of the present invention. It consists of 35 to 39% by weight of a non-saturated polyester with a degree of unsaturation of 60% formed by polyesterification of 1,2-propylene glycol, phthalic anhydride and maleic anhydride, and further comprises 32 to 36% by weight of styrene, 27 to 31% by weight of methyl methacrylate and 0.01 to 0.03% by weight of hydroquinone. This base, as a base, is cured by adding 0.050 to 0.075% by volume of accelerator formed by a solution of cobalt naphthenate in toluene of 3.5 to 4. 5 wt% Co and addition of 0.6-1.0 vol% initiator consisting of 48-52 wt% methylcyclohexanone peroxide - (C6H9O) 2 (CH3) 2 (OH) (OOH), 14-16 wt% 2-methylcyclohexanol and 33 to 37 wt% dibutyl phthalate.

The composition according to the invention is a complex property suitable for strengthening geological preparations. Before curing, it is characterized by its penetration properties, which, compared to the previously used reinforcing plastics, make it possible to achieve the same saturation results with 150 to 250 much less pressure drop. The hardness and polishability of the material after curing satisfies the need to prepare geological specimens, and with its refractive index iV5 = 1.540 to 1.545 it satisfies the geological practice. It is stable in vacuum for electron micro-analysis. In the thin layer below 0.5 mm, a clear mass flows.

The geological preparation reinforcement mass is prepared by mixing defined components, i.e., unsaturated polyester, hydroquinone, styrene, methyl methacrylate, accelerator and initiator so that hydroquinone, styrene, methyl methacrylate, and then accelerator and initiator are dispensed into the unsaturated polyester. 202809

Claims (2)

202809 EXAMPLE 2 A mixture containing 36.75% by weight of unsaturated polyester, 0.02% by weight of hydroquinone, 33.62% by weight of styrene and 29.61% by weight of methyl methacrylate appears to be optimal. The mass is cured by adding 0.09 volume% accelerator and 0.7 volume% initiator. Before curing, the specific gravity of the material at 25 ° C is 1040 kg. m-3, dynamic viscosity of 6.7 x 10 -3 Pa. s, surface tension35.10 "3 Pa, wetting angle to glass 8.73.10" 1 rad; after curing the microhardness is Vickers2,25.108 N. m-2 and refractive index n ≥ 5 = 1.545. The volume decreases during hardening by 11% its volume The curable mass based on the unsaturated polyester resin according to the invention is particularly suitable for the strengthening of disintegrating and porous objects. A curable mass based on unsaturated polyester resin for strengthening geological preparations, characterized in that it comprises 35 to 39% by weight of unsaturated polyester by 60% unsaturation, resulting from the polystyreneization of 1,2-propylene glycol, phthalic anhydride, amalein hydride; 32 to 36% w / w of styrene, 27 to 31% w / w methyl methacrylate, and 0.01 to 0.03% w / w hydroquinone, to strengthen the samples to such an extent as to allow subsequent cutting, grinding of the alloys during preparation cuts and cuts of geological specimens. The most suitable is the superimposition of the vacuumed samples by the mass according to the invention and subsequent aeration, or by pressurization with a pressure higher than 0.1 MPa. By using the mass according to the invention, the same saturation result is obtained compared to the previously used masses with a 150 to 250 fold lower pressure gradient. If the same pressure gradient is used, the pores are saturated with a radius of 10 to 100 times less. The cured mass of the vinegar and vacuum-stable, abrasive and polishable Due to its optical properties, its refractive index can be used for identification purposes, for example to distinguish potassium feldspars. YNALEZ is cured by the addition of 0.050 to 0.075 vol% accelerator consisting of a solution of cobalt naphthenate in toluene with 3.5 to 4.5 wt% Co and the addition of 0.6 to 1.0 vol% initiator consisting of 48 to 52 wt% methylcyclohexanone peroxide - (C6H9O) 2 (CH3) 2 (OH) (OOH), 14-16 wt% 2-methylcyclohexanol and up to 37 wt% dibutyl phthalate. incl. 31 81. 5112 Price: 2,40 Kčs