EP0317205A2
Expired / Lapsed
EP
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Imido group-containing silicon oligomers and cured product thereof, and their preparation
Assignee: JNC Corp
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Filing: 1988-11-11
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Granted: —
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Expires: 2008-11-11
Abstract
Abstract An imido group-containing silicon oligomer has a viscosity number of 0.05 to 0.5 dl/g when measured at a concentration of 0.5 g/dl at a temperature of 30 ± 0.01°C and comprises a compound of the formula: in which R¹ is a tetravalent carbocyclic aromatic group and the two carbonyl groups constituting one imide group are attached ortho to each other; the groups R² are each a group (in which t is an integer of 1 to 4); and R³ and R⁴ are the same or different and each is a C₁ - C₆ alkyl group, a phenyl group or an alkyl-substituted phenyl group having 7 to 12 carbon atoms; k and m are each 0, 1, 2 or 3 and the sum of k and m is 1 or more; n is from 1 to 4; and each of p and q is a positive integer; The oligomer may be cured to give a hard coating on a substrate and may be prepared by reaction of an appropriate tetracarboxylic anhydride, silicon-amino compounds and silicon compounds.
Inventors
- 👤 Koichi Kunimune
- 👤 Haruo Kato
- 👤 Yoshiya Kutsuzawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C08G77/48; C08G77/54
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
221 words
An imido group-containing silicon oligomer which has a logarithmic viscosity number of 0.05 to 0.5 dl/g when measured at a concentration of 0.5 g/dl at a temperature of 30 ± 0.01°C and which comprises a compound of the formula: in which R¹ is a tetravalent carbocyclic aromatic group and the two carbonyl groups constituting one imide group are attached ortho to each other; the groups R² are each a group (in which c is an integer of 1 to 4); and R³ and R⁴ are the same or different and each is a C₁ - C₆ alkyl group, a phenyl group or an alkyl-substituted phenyl group having 7 to 12 carbon atoms; k and m are each 0, 1, 2 or 3 and the sum of k and m is 1 or more; n is from 1 to 4 and each of p and q is a positive integer; the aforesaid logarithmic viscosity number being ηinh represented by the following formula: ηihn = ℓn(η/η o )/C wherein η is a viscosity measured at a temperature of 30 ± 0.01°C at a ooncentration of 0.5 g/dl in a solvent by the use of Ubbelohde's viscometer, η o is the viscosity of the solvent at the same temperature by the use of the same viscometer, and C is a ooncentration of 0.5 g/dl.
Claim 2
Dependent Claim
221 words
An imido group-containing silicon oligomer which has a logarithmic viscosity number of 0.05 to 0.5 dl/g when measured at a concentration of 0.5 g/dl at a temperature of 30 ± 0.01°C and which comprises a compound of the formula: in which R¹ is a tetravalent carbocyclic aromatic group and the two carbonyl groups constituting one imide group are attached ortho to each other; the groups R² are each a group (in which c is an integer of 1 to 4); and R³ and R⁴ are the same or different and each is a C₁ - C₆ alkyl group, a phenyl group or an alkyl-substituted phenyl group having 7 to 12 carbon atoms; k and m are each 0, 1, 2 or 3 and the sum of k and m is 1 or more; n is from 1 to 4 and each of p and q is a positive integer; the aforesaid logarithmic viscosity number being ηinh represented by the following formula: ηihn = ℓn(η/η o )/C wherein η is a viscosity measured at a temperature of 30 ± 0.01°C at a ooncentration of 0.5 g/dl in a solvent by the use of Ubbelohde's viscometer, η o is the viscosity of the solvent at the same temperature by the use of the same viscometer, and C is a ooncentration of 0.5 g/dl.
Claim 3
Dependent Claim
14 words
An oligomer as claimed in claim 1 in which R² is a phenylene group.
Claim 4
Dependent Claim
22 words
An oligomer as claimed in claim 1 or claim 2 in which k is 3, m is 3 and n is 4.
Claim 5
Dependent Claim
39 words
A cured imido group-containing cured silicon material comprising a component of the formula: in which R¹, R², R³, R⁴, k , m and n have the meanings defined in claim 1 and r and s are each positive integers.
Claim 6
Dependent Claim
29 words
A cured material as claimed in claim 4 in whch R² is as defined in claim 2 and/or k , m and n are as defined in claim 3.
Claim 7
Dependent Claim
180 words
A method for preparing an imido group-containing soluble silicon oligomer comprising a component of formula (I) as defined in claim 1, which method comprises reacting a mole of a compound of formula (II) or a diester thereof; (in which R¹ is as defined in claim 1); b moles of compounds of the formulae: H₂N-R²- SiR³ 3-k X k (III) and H₂N-R²-SiR₃ ³ 3-m X m (III′) (in which R², R³, k and m are as defined in claim 1 and X is a halogen atom oran alkoxy, acetoxy or hydroxyl group); and c moles of a compound of the formula: SiR⁴ 4-n X n (IV) (in which R and n are as defined in claim 1); the ratio of the compounds of formula (II), (III), (III′) and (IV) satisfying the equations: 1.8 ≦ b / a ≦ 2.2 (V) 0.03 ≦ c / a ≦ 33 (VI) in a solvent in an amount of 70% or more by weight based on the total weight of the reaction mixture, at a temperature of 0 to 200°C for 0.2 to 40 hours.
Claim 8
Dependent Claim
59 words
A method as claimed in claim 6 in which three or four kinds of compouonds of the formulae (II), (III), III′) and (IV) are mixed; the mixture is reacted at a temperature of 0 to 200°C for 0.2 to 10 hours; and the reaction is further continued at a temperature of 60 to 200°C for 0 to 30 hours.
Claim 9
Dependent Claim
52 words
A method as claimed in claim 7 in which an acid and/or a small amount of water are added to the reaction mixture after reaction at 0 to 200°C for 0.2 to 10 hours and reaction is then further continued at a temperature of 60 to 200°C for 0 to 20 hours.
Claim 10
Dependent Claim
65 words
A modification of the method claimed in claim 8 in which two or three kinds of compounds of formulae (II), (III), (III′) are mixed and then reacted at a temperature of 0 to 200°C for 0.2 to 10 hours; the compound of formula (IV) is added thereto; and the reaction is further continued at a temperature of 60 to 200°C for 0 to 20 hours.
Claim 11
Dependent Claim
67 words
A method as claimed in claim 9 in which, after the compounds of (II), (III), (III′) have been mixed and reacted at a temperature of 0 to 200°C for 0.2 to 10 hours, the compound of formula (IV) and an acid and/or a small amount of water are added thereto; and reaction is further continued at a temperature of 60 to 200°C for 0 to 20 hours.
Claim 12
Dependent Claim
48 words
A method for preparing an imido group-containing cured silicon material which comprises heating, at a temperature of 50 to 500°C, a solution containing the imido group-containing soluble silicon oligomer obtained by the method of Claim 7, in order to evaporate the solvent and to simultaneously crosslink/cure the oligomer.
References Cited (Backward Citations)
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