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US4965385A
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Organosilane stabilizers for inorganic silicates in antifreezer/coolant compositions
Assignee: Korea Advanced Institute of Science and Technology
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Filing: 1988-04-12
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Granted: 1990-10-23
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Expires: 2008-04-12
Abstract
Abstract Organotrialkoxysilane stabilizers for inorganic silicate corrosion inhibitor additives in antifreezer/coolant formulations are described. The stabilizers have the following structure: <IMAGE> wherein R is an alkyl group of 1-4 carbon atoms, R1 is either <IMAGE> and R2 and R3 may be same or different and selected from -Ph, -CN, <IMAGE> (wherein R is an alkyl group of 1-4 carbon atoms). These stabilizers help prevent the gelation of the corrosion inhibiting silicate additives in antifreezer/coolant formulations so that the silicates could be more persistent in their corrosion inhibiting properties.
Inventors
- 👤 Il Nam Jung
- 👤 Sang Yo Hwang
- 👤 Hae Kyung Bae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:11
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C23; C23F; C23F11/00; C23F11/08; C07F7/08; C07F7/0834; C07F7/0836; C07F7/18; C07F7/1804; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
Organosilanes of the formula: ##STR31## useful as a stabilizer of inorganic silicates in antifreezer/coolant formulations, wherein each R is independently an alkyl group of 1-4 carbon atoms, R 1 is selected from the group consisting of ##STR32## and R 2 is -phenyl and R 3 is --CN.
Claim 2
Dependent Claim
47 words
Organosilanes of the formula: ##STR31## useful as a stabilizer of inorganic silicates in antifreezer/coolant formulations, wherein each R is independently an alkyl group of 1-4 carbon atoms, R 1 is selected from the group consisting of ##STR32## and R 2 is -phenyl and R 3 is --CN.
Claim 3
Dependent Claim
95 words
A process for the preparation of an organosilane of the formula: ##STR33## wherein R is an alkyl group of 1-4 carbon atoms, R 1 is selected from the group consisting of ##STR34## and R 2 is -Phenyl and R 3 is --CN, which comprises reacting glycidoxypropyltrialkoxysilane or beta-(3,4-epoxycyclohexyl) ethyltrimethoxysilane with an organic compound of the formula: X--CH.sub.2 --Y in the presence of a base catalyst at a temperature ranging between about 25° C. and about 200° C., wherein X and Y are identical or different and selected from the group consisting of -Phenyl and --CN.
Claim 4
Dependent Claim
95 words
A process for the preparation of an organosilane of the formula: ##STR33## wherein R is an alkyl group of 1-4 carbon atoms, R 1 is selected from the group consisting of ##STR34## and R 2 is -Phenyl and R 3 is --CN, which comprises reacting glycidoxypropyltrialkoxysilane or beta-(3,4-epoxycyclohexyl) ethyltrimethoxysilane with an organic compound of the formula: X--CH.sub.2 --Y in the presence of a base catalyst at a temperature ranging between about 25° C. and about 200° C., wherein X and Y are identical or different and selected from the group consisting of -Phenyl and --CN.
Claim 5
Dependent Claim
46 words
The process as claimed in claim 2, wherein said base catalyst is selected from the group consisting of RLi, RMgX, M1OR, sodium hydride, and phenyllithium wherein R is an alkyl group of 1-4 carbon atoms, X is chlorine or bromine and M1 is sodium or potassium.
Claim 6
Dependent Claim
21 words
The process as claimed in claim 3, wherein said RLi is, selected from the group consisting of methyllithium, n-butyl-lithium, and t-butyllithium.
Claim 7
Dependent Claim
24 words
The process as claimed in claim 3, wherein said RMgX is selected from the group consisting of methyl magnesium chloride, and methyl magnesium bromide.
Claim 8
Dependent Claim
13 words
The process as claimed in claim 3, wherein said M1OR is sodium methoxide.
References Cited (Backward Citations)
CA862779A
Cited
US4230904A
Cited
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