SU867919A1 - Composition for heat indicating of melting - Google Patents

Description

(54) COMPOSITION FOR MELT THERMAL INDICATOR

The invention relates to melting TepMOHHflHKiaTbpoB compositions intended for the visual and photographic determination of the surface temperature of two bodies heated to 54-9 ° C at atmospheric pressure and in a vacuum of 10 mm Hg in hard-to-reach places and where it is not possible other measurement methods. The invention can be used in various fields of science and technology. Known thermal indicators pavlvnv. on the basis of high molecular carbon and C13 pigments. .. The disadvantages of these thermal indices are the instability of the readings tQ Ltt & The temperature of melting thermal indices trl at atmospheric pressure and in vacuum, the thrust image of the boundary of the transition to film, especially black-and-white, since iran, me- chanical apoclitics, are poor, because of the test bodies. Thermal indicator of melting in the temperature range of 25-225 ° C, containing as temperature-sensitive substances, pro-: derivatives of higher carboxylic acids in the interval of 50-91 ° C: phenyl stearate; on - tripalmitin; at 65 ° C; trsteartn; na - caprylate lead; 91 C - cristat lead G23. The disadvantage of this docraea is the low measurement accuracy in the temperature range 5 ° -91 ° C due to the large interval between adjacent temperatures, with an atom, the temperature measurement error is 4-13%. The purpose of the invention is to improve the accuracy of measuring the surface temperature of solids at atmospheric pressure in vacuum in the temperature range 54. The goal is achieved by the fact that ffto is an all-rater for the terms of the dictator that melts as an TV | lokuvstviteli101ch substances smsm yttri or ytterbi, or erbium of higher carboxylic acids and ethyl alcohol, with the following ratio of components, wt.%: Heat-sensitive substance8,6-15,4 Binder 12,7-13,6 Ethyl alcohol Remaining Phenol formaldehyde resin is used as a binder , combined with polyvinyl butyral in ethyl alcohol in a ratio of 1: 6. When the temperature of the sensitive substance is below 8.6% by weight, a very liquid suspension is obtained which drains from the test surface, and if it is more than 15.4% by weight, a thick suspension is obtained which is poorly applied to the surface. Example 1. 9.8% by weight of yttria, trisecano-jadecate 13.5% by weight of phenol-formaldehyde resin combined with polyvinyl butyral, and 76.7% by weight of ethanol are loaded into a ball mill filled with 1/3 of the headlight balls and mixed for 20-30 hours. A heat indicator is obtained on (TI-54). Example 2. 13.3 wt.% Ytterbium tridecovolume, 12.8 wt.% Phenol for maldehyde resin, combined with polyH, and 74.2 wt.% Of ethanol is loaded into a ball mill.

Erbium Undecate

Yttrium Undecanoate

Yttrium lauric

Yttrium tridecanoluric acid

Yttrium tridecano-pentadecanoate

Yttrium tridecate

Yttrium pentadecanoic

Yttrium pentadecano-palmitate

TI-57 TI-58 TI-63 TI-7O

ТИ-72 ТИ-78 ТИ-8Х

TI-89 filled with 1GZ of volume by porcelain balls, and stirred for 2030 hours. A temperature indicator of 7 (TI-75) is obtained. P p i. M e I. 3. 15.4 wt.% ytterbi palmitic acid, 12.7 wt.% phenol-formaldehyde resin combined with polyvinyl butyral and 71.9 wt.% ethyl alcohol are loaded into a ball mill. filled to 1/3 of the porcelain volume. knots, and stirred for 2030 hours. A thermal indicator of 88 ° C (TI-88) is obtained. Example 4, 8.6 wt.% Yttrium palmitic acid, 13.6 wt.% Phenol-formaldehyde resin, combined with polyvinyl butyral, 77.8 wt.% Ethyl. alcohol is loaded into a 1/3 volume ball mill filled with porcelain balls, and stirred for 20-30 hours. A thermal indicator at 92 ° C is obtained (TI92). Example 5. 9, O wt.% Erbium stearinovokisly, 13.4 wt.% Phenol-formaldehyde resin, combined with polyvinyl butyral, 77.6 wt.% Ethyl alcohol is loaded into a ball mill 1/3 of the volume, filled with porcelain balls, and mixed into for 20-30 hours. A heat indicator is obtained for 9bS (TI-96). The melting points of thermal indicators, depending on the temperature-sensitive substance, are given in the table. Heat indicator in the form of a suspension nanbits on the test surface with a brush or spray gun until it is completely dry. A more thermal indicator coating becomes transparent when the shimmering temperature is reached, which provides a contrast border in Vdual and photographic perceptions. The proposed composition of the melting thermal indicator allows the measurement of the surface temperature of solids at atm. pressure and vacuum in the temperature range of 54-96 ° C with an accuracy of 0.5-5%. Formula of the invention 1. A composition for a thermal indicator of melting, including a heat-sensitive substance and a binder, is distinguished by the fact that, in order to improve the accuracy of measuring the surface temperature of solids at atmospheric pressure and in vacuum in the temperature range 54-96 ° C, it Contains as a heat-sensitive substance a salt of yttri, or ytterbi, or erbium of higher carboxylic acids and ethyl alcohol. The ratio of components is wt.% Heat-sensitive substance 8,6-15,4 Binder 12,7-13,6 Ethyl alcohol Rest 2. Comp. in clause 1, it is also distinguished by the fact that, as yttrium, ytterby and erbium salts of higher carboxylic acids, it contains yttrium tridecano undekanoxyp 1, or ittry undecanoic acid, or yttrium lauric acid, or yttrium tridecanolate, or Itrijy acid, or yttrium tridecanolate, and Ietryt jerry, and ytriy lauric acid, or yttrium tridecanolate, and Iytryan acid, or yttrium lauric acid, or yttrium tridecanolate; yttrium tridecanoate, or yttrium pentadecanoic acid, or yttry pentadecano-palmitate, or yttrium palmitic acid, or ytterbium tridecanoate, or ytterbium palmitic acid, or erbium, undecate, or erbium stede rhinate. Sources of information taken into account during the examination 1. USSR author's certificate No. 345378, cl. G 01 K 11/06, 1969. 2. USSR author's certificate No. 401214, cl. G 01 K 11/16, 1971 (prototyd).

Claims (2)

Claim 1. The composition for the melting temperature indicator, including a thermosensitive substance and a binder, characterized in that, in order to improve the accuracy of measuring the surface temperature of solids at atmospheric pressure and in vacuum in the temperature range 54-96 ° C, it contains as a thermosensitive substance salt of yttrium, or ytterbium, or erbium of higher carboxylic acids and ethyl alcohol in the following ratio of components wt.% Heat-sensitive substance '8.6-15.4 5 Binder 12.7-13.6 ^; Ethyl alcohol Else 2. The composition of l. 1, which differs from the fact that, as the salts of yttrium, ytterbium and erbium of higher carboxylic acids 10, it contains yttrium tridecano »undecanoic acid, or yttrium undecanoic acid, or yttrium lauric acid, or yttrium tridecanolauric acid, or yttrium tridecano-tridecanoic pentadecanoic or pentadecanoic acid 15 or yttrium pentadecanoic acid or yttrium pentadecano-palmitic acid or yttrium palmitic acid or ytterbium tridecanoic or ytterbium palmitic acid or erbium undecanoic or erbium stear new acid.