FR2481308A1 - Wax-based corrosion inhibitor compsns. - contg. alkaline earth metal alkyl:sulphonamido carboxylate - Google Patents

Wax-based corrosion inhibitor compsns. - contg. alkaline earth metal alkyl:sulphonamido carboxylate Download PDF

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Publication number
FR2481308A1
FR2481308A1 FR8009598A FR8009598A FR2481308A1 FR 2481308 A1 FR2481308 A1 FR 2481308A1 FR 8009598 A FR8009598 A FR 8009598A FR 8009598 A FR8009598 A FR 8009598A FR 2481308 A1 FR2481308 A1 FR 2481308A1
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France
Prior art keywords
alkaline earth
compsns
wax
salt
alkyl
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8009598A
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French (fr)
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FR2481308B1 (en
Inventor
Michele Brun
Jean-Paul Rouvier
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LABO IND
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LABO IND
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Priority to FR8009598A priority Critical patent/FR2481308A1/en
Publication of FR2481308A1 publication Critical patent/FR2481308A1/en
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Publication of FR2481308B1 publication Critical patent/FR2481308B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K15/00—Anti-oxidant compositions; Compositions inhibiting chemical change
    • C09K15/04—Anti-oxidant compositions; Compositions inhibiting chemical change containing organic compounds

Abstract

Corrosion inhibitor compsns comprise (a)an alkaline earth metal salt of a higher alkylsulphonamido carboxylic acid, (b)an oxidised wax, (c) a hard microcrystalline wax, and opt (d) a volatile organic solvent. Component (a) is pref a Ca salt of an acid of formula RSO2NHR'COOH (where R is 10-20C alkyl and R' is 1-6C alkylene, esp CH2). The (b)=(a) wt ratio is pref 5-100:100 and the (c)=(a) wt ratio is pref 10-200:100. Pref compsns contain 15-35%(a) 3-12(b), 15-30%(c)and 30-50%(d). The compsns are useful for protecting ferrous metals, esp carbodies, e.g. giving protection for more than 2000 hr in the ASTM B 117 salt spray test on rolled steel plates.

Description

La présente invention concerne une composition inhibitrice de la corrosion destinée notamment à protéger contre la corrosion par oxydation des métaux ferreux et, plus particulièrement, les carrosseries de véhicules automobiles. The present invention relates to a corrosion inhibiting composition intended in particular to protect against corrosion by oxidation of ferrous metals and, more particularly, the bodies of motor vehicles.

La présente invention a pour objet une composition inhibitrice de la corrosion caractérisée en ce qu'elle comprend un mélange de
a - un sel alcalino-terreux d'un acide alkyl (sup.) sulfonamido carboxylique
b - une cire oxydée, et
c - une cire microcristalline dure.The subject of the present invention is a corrosion inhibiting composition, characterized in that it comprises a mixture of
a - an alkaline earth salt of an alkyl (sup.) sulfonamido carboxylic acid
b - an oxidized wax, and
c - a hard microcrystalline wax.

La composition selon l'invention peut comprendre également, en vue de son application, un véhicule ou un diluant dans lequel est dispersé le mélange des trois constituants essentiels. The composition according to the invention may also comprise, for its application, a vehicle or a diluent in which the mixture of the three essential constituents is dispersed.

Elle peut, en outre, comprendre des additifs classiquement utilisés dans de elles compositions, tels que des cires, pétrolatums, bitumes. It can, in addition, comprise additives conventionally used in their compositions, such as waxes, petrolatums, bitumens.

La composition selon l'invention comprend avanta- geusement les trois constituants essentiels dans des proportions telles que les cires oxydées représentent de 5 à 100 % du poids du sel alcalino-terreux d'acide alkyl (sup.) sulfonamido carboxylique et que les cires microcristallines représentent de 40 à 200 % du poids de ce sel. The composition according to the invention advantageously comprises the three essential constituents in proportions such that the oxidized waxes represent from 5 to 100% by weight of the alkaline earth salt of alkyl (sup.) Sulfonamido carboxylic acid and that the microcrystalline waxes represent from 40 to 200% of the weight of this salt.

Le sel alcalino-terreux d'acide alkyl (sup.) sulfonamido carboxylique est, en particulier, un sel de calcium. L'acide dont dérive le sel est avantageusement un acide alkyl (C1O-C20) sulfonamido alcane (C1-C6) carboxylique et de préférence un acide alkyl (C1O-C20) sulfonamido acétique. The alkaline earth salt of (sup.) Sulfonamido carboxylic acid is, in particular, a calcium salt. The acid from which the salt is derived is advantageously an alkyl (C1O-C20) sulfonamido alkane (C1-C6) carboxylic acid and preferably an alkyl (C1O-C20) sulfonamido acetic acid.

La préparation de tels acides a été décrite dans le brevet US. 2 225 960. Ces acides sont, en pratique, préparés à partir de coupes pétrolières ayant une certaine répartition dans le nombre d'atomes de carbone de la chaîne alkyle supérieure et sont donc constitués par des mélanges.  The preparation of such acids has been described in the US patent. 2,225,960. These acids are, in practice, prepared from petroleum fractions having a certain distribution in the number of carbon atoms in the upper alkyl chain and therefore consist of mixtures.

Les sels alcalino-terreux de ces acides peuvent être préparés par chauffage d'un mélange de l'acide et d'un hydroxyde alcalino-terreux en excès. En pratique, il suffit de chauffer à 100-1200C pendant une heure. The alkaline earth salts of these acids can be prepared by heating a mixture of the acid and an excess alkaline earth hydroxide. In practice, it is enough to heat to 100-1200C for one hour.

Par "cire oxydée", on désigne aussi bien des pétrolatums oxydés préparés à partir de pétrolatums extraits du pétrole que des cires oxydées dérivées de cires synthétiques. By "oxidized wax" is meant both oxidized petrolatums prepared from petroleums extracted from petroleum and oxidized waxes derived from synthetic waxes.

Les cires oxydées utilisées dans la présente invention ont un indice d'acides de 15 à 130 et, de pré férence > de 20 à 70. The oxidized waxes used in the present invention have an acid number from 15 to 130 and, preferably> from 20 to 70.

Les cires microcristallines dures utilisées dans la présente invention sont des cires minérales dont le point de fusion (ASTMD 127) varie de 80 à 1300C et dont la pénétration à 250C (ASTIND 1321) est de 6 à 9 environ. The hard microcrystalline waxes used in the present invention are mineral waxes whose melting point (ASTMD 127) varies from 80 to 1300C and whose penetration at 250C (ASTIND 1321) is from 6 to 9 approximately.

Les compositions selon l'invention peuvent être présentées sous forme de concentrés constitués par une dispersion des trois constituants essentiels dans un solvant organique volatil, notamment un solvant dérivé du pétrole, tel que le white spirit. Les concentrés peuvent avoir en pourcentage en poids la composition suivante
- Sel alcalino-terreux d'acide
alkyl (sup.) sulfonamido carbo
xyl ique 15-35 ,
- Cires oxydées 3-12 %
- Cire microcristallines dures 15-30 ss
- Solvant organique volatil 30-50 ss
L'exemple suivant illustre la présente invention.The compositions according to the invention can be presented in the form of concentrates constituted by a dispersion of the three essential constituents in a volatile organic solvent, in particular a solvent derived from petroleum, such as white spirit. The concentrates can have the following composition in percentage by weight
- Alkaline earth acid salt
alkyl (sup.) sulfonamido carbo
xylic 15-35,
- Oxidized waxes 3-12%
- Hard microcrystalline wax 15-30 ss
- Volatile organic solvent 30-50 ss
The following example illustrates the present invention.

On prépare une composition selon l'invention en mélangeant, à température ordinaire, dans un malaxeur - Sel de calcium de l'acide alkyl (C14-Cl6) sulfonamido acétique ....... 31 % en poids
Densité 1,048 à 20 C
Viscosité à 20 C : 85 10'6 m2/s
Indice de réfraction à 200C : 1,4782
Pourcentage de C 15 : 75 ss environ - Cire oxydée- cire de polyéthylène (PED 136) 6 % en poids
Point de goutte ASTM D 566 107-1120C
Indice d'acide ASTM D 1386 60-64
Indice de saponification ASTM D 1387 90-115
Densité à 200C ASTM D 1298 1,01-1,03 - Cire microcristalline dure Microflex M 200 23 ss en poids
Point de solidification ASTM D 938 83/58 C
Point de fusion ASTM D 127 92,50C
Pénétration à 250C ASTM D 1321, 7 à 9
Viscosité à 1000C, 14 à 15 10-3 N.s/m2 - Solvant organique volatil (White Spirit) 38 ss en poids
Cette composition est testée par application sous forme de pellicules continues sur des plaques d'acier ordi- naire laminé (pourcentage de carbone inférieur à 0,27 ). A composition according to the invention is prepared by mixing, at ordinary temperature, in a kneader - Calcium salt of alkyl acid (C14-Cl6) acetic sulfonamido ....... 31% by weight
Density 1,048 at 20 C
Viscosity at 20 C: 85 10'6 m2 / s
Refractive index at 200C: 1.4782
Percentage of C 15: around 75 ss - Oxidized wax - polyethylene wax (PED 136) 6% by weight
ASTM D 566 107-1120C Dropping Point
Acid number ASTM D 1386 60-64
Saponification index ASTM D 1387 90-115
Density at 200C ASTM D 1298 1.01-1.03 - Hard microcrystalline wax Microflex M 200 23 ss by weight
Solidification point ASTM D 938 83/58 C
Melting point ASTM D 127 92.50C
Penetration at 250C ASTM D 1321, 7 to 9
Viscosity at 1000C, 14 to 15 10-3 Ns / m2 - Volatile organic solvent (White Spirit) 38 ss by weight
This composition is tested by application in the form of continuous films on ordinary rolled steel plates (percentage of carbon less than 0.27).

On laisse sécher les plaques et on les expose au brouillard salin suivant la norme ASTM B 117.The plates are left to dry and they are exposed to salt spray according to standard ASTM B 117.

Les essais sont effectuées avec des pellicules de 50 microns d'épaisseur. The tests are carried out with films 50 microns thick.

On obtient une durée de protection supérieure à 2000 heures.  A protection duration greater than 2000 hours is obtained.

Claims (7)

RSEITDICAT I 31JSRSEITDICAT I 31JS 1. Composition inhibitrice de la corrosion, caractérisée en ce qu'elle comprend un mélange de 1. A corrosion inhibiting composition, characterized in that it comprises a mixture of a - un sel alcalino-terreux d'un acide alkyl (sup.) sulfonamido carboxylique, a - an alkaline earth salt of an (sup.) sulfonamido carboxylic acid, b - une cire oxydée, et b - an oxidized wax, and c - une cire microcristalline dure. c - a hard microcrystalline wax. 2. Composition selon la revendication 1, caractérisée en ce que les cires oxydées représentent de 5 à 100 % du poids du sel alcalino-terreux d'acide alkyl (sup.) sulfonamido carboxylique et les cires microcristallines représentant de 10 à 200 ss du poids de ce sel. 2. Composition according to claim 1, characterized in that the oxidized waxes represent from 5 to 100% by weight of the alkaline earth salt of alkyl (sup.) Sulfonamido carboxylic acid and the microcrystalline waxes representing from 10 to 200 ss by weight of this salt. 3. Composition selon la revendication 1 ou -la revendication 2, caractérisée en ce que le sel alcalinoterreux d'acide alkyl (sup.) sulfonamido carboxylique est un sel de calcium. 3. Composition according to claim 1 or -la claim 2, characterized in that the alkaline earth salt of alkyl (sup.) Sulfonamido carboxylic acid is a calcium salt. 4. Composition selon l'une quelconque des revendications précédentes, caractérisée en ce que le sel alcalino-terreux est un sel alcalino-terreux d'un acide alkyl (C1O-C20) sulfonamide alcane (C1-C6) carboxylique.  4. Composition according to any one of the preceding claims, characterized in that the alkaline earth salt is an alkaline earth salt of an alkyl (C1O-C20) sulfonamide alkane (C1-C6) carboxylic acid. 5. Composition selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le sel alcalinoterreux est un sel alcalino-terreux d'un acide alkyl (C1O-C20) sulfonamido acétique. 5. Composition according to any one of claims 1 to 4, characterized in that the alkaline earth salt is an alkaline earth salt of an alkyl acid (C1O-C20) acetic sulfonamido. 6. Composition selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle comprend un solvant organique volatil. 6. Composition according to any one of claims 1 to 5, characterized in that it comprises a volatile organic solvent. 7. Composition selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu elle comprend de 15 à 35 ffi de sel alcalino-terreux d'acide alkyl (sup.) sulfonamido carboxylique, de 3 à 12 S de ciresoxydées,de 15 à 30 ss de cires microcristallines dures et de 30 à 50 ss de solvant organique volatil.  7. Composition according to any one of claims 1 to 6, characterized in that it comprises from 15 to 35 ffi of alkaline earth salt of alkyl (sup.) Sulfonamido carboxylic acid, from 3 to 12 S of waxes, 15 to 30 ss of hard microcrystalline waxes and 30 to 50 ss of volatile organic solvent.
FR8009598A 1980-04-29 1980-04-29 Wax-based corrosion inhibitor compsns. - contg. alkaline earth metal alkyl:sulphonamido carboxylate Granted FR2481308A1 (en)

Priority Applications (1)

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FR8009598A FR2481308A1 (en) 1980-04-29 1980-04-29 Wax-based corrosion inhibitor compsns. - contg. alkaline earth metal alkyl:sulphonamido carboxylate

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Application Number Priority Date Filing Date Title
FR8009598A FR2481308A1 (en) 1980-04-29 1980-04-29 Wax-based corrosion inhibitor compsns. - contg. alkaline earth metal alkyl:sulphonamido carboxylate

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FR2481308B1 FR2481308B1 (en) 1983-11-25

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2602760A (en) * 1950-07-18 1952-07-08 Josef M Michel Process of protecting metals against corrosion
DE1188751B (en) * 1955-03-19 1965-03-11 Exxon Standard Sa Corrosion protection mixtures
FR2236018A1 (en) * 1973-07-02 1975-01-31 Betz Laboratories Glycine cpds for inhibiting metal corrosion - in cooling water systems
FR2351166A1 (en) * 1976-05-12 1977-12-09 Witco Chemical Corp CORROSION INHIBITORS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2602760A (en) * 1950-07-18 1952-07-08 Josef M Michel Process of protecting metals against corrosion
DE1188751B (en) * 1955-03-19 1965-03-11 Exxon Standard Sa Corrosion protection mixtures
FR2236018A1 (en) * 1973-07-02 1975-01-31 Betz Laboratories Glycine cpds for inhibiting metal corrosion - in cooling water systems
FR2351166A1 (en) * 1976-05-12 1977-12-09 Witco Chemical Corp CORROSION INHIBITORS

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