Patent EP0102193A2 successfully refreshed from Google Patents.
EP0102193A2
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EP
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Stabilizers for synthetic resins
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1983-07-26
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Granted: —
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Expires: 2003-07-26
Abstract
Abstract The invention provides a synthetic resin stabilizer whose effective ingredient comprises a mixture of (I) at least one phenolic compound represented by the general formula: wherein R, is hydrogen, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms, and n is an integer from 1 to 4, and (II) at least one sulfur-containing compound selected from compounds represented by the general formulae (11-1) and (11-2): wherein R 2 is an alkyl group having 4 to 20 carbon atoms, and wherein R 3 is an alkyl group having 3 to 18 carbon atoms, and R 4 and R 5 are selected independently from hydrogen and alkyl groups having 1 to 6 carbon atoms. The compounds (I) wherein n is 1 to 3 are novel. The stabilizer is useful for improving the stability to heat, light or oxygen of a wide range of synthetic resins, including polyolefins and particularly polypropylene.
Inventors
- 👤 Tamaki Ishii
- 👤 Shinichi Yachigo
- 👤 Yukoh Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 12:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/04; C08K5/13; C08K5/378
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
A stabilizer for snythetic resins characterised in that its effective ingredient comprises a mixture of (I) at least one phenolic compound represented. by the general formula (I) : wherein R 1 is hydrogen, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms, and n is an integer from 1 to 4, and (II) at least one sulfur-containing compound selected from compounds represented by the general formulae (II-1) and (II-2): wherein R 2 is an alkyl group having 4 to 20 carbon atoms, and wherein R 3 is an alkyl group having 3 to 18 carbon atoms, and R 4 and R 5 are selected independently from hydrogen and alkyl groups having 1 to 6 carbon atoms.
Claim 2
Dependent Claim
126 words
A stabilizer for snythetic resins characterised in that its effective ingredient comprises a mixture of (I) at least one phenolic compound represented. by the general formula (I) : wherein R 1 is hydrogen, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms, and n is an integer from 1 to 4, and (II) at least one sulfur-containing compound selected from compounds represented by the general formulae (II-1) and (II-2): wherein R 2 is an alkyl group having 4 to 20 carbon atoms, and wherein R 3 is an alkyl group having 3 to 18 carbon atoms, and R 4 and R 5 are selected independently from hydrogen and alkyl groups having 1 to 6 carbon atoms.
Claim 3
Dependent Claim
17 words
A stabilizer according to claim 1 characterised in that the weight ratio (I): (II) is I: 0.5-15.
Claim 4
Dependent Claim
23 words
A stabilizer according to claim 1 characterised in that component (I) is selected from tetrakis(3-(3-methyl-5-t-butyl-4-hydroxyphenyl)propionyloxymethyl)methane, 2,2,2-tris (3-(3-methyl-5-t-butyl-4-hydroxyphenyl)propionyloxymethyl) ethanol, 2,2,2-tris(3-(3-methyl-5-t-butyl-4-hydroxyphenyl) propionyloxymethyl)ethyl acetate, and 2,2,2-tris(3-(3-methyl-5-t-butyl-4-hydroxyphenyl)propionyloxymethyl)-1-methoxyethane.
Claim 5
Dependent Claim
20 words
A stabilizer according to claim 1 or 2 or 3 characterised in that component (II) comprises tetrakis-(3- dodceylthiopropionyloxymethyl)methane and/or 3,9-bis(2-dodecylthioethyl)-2,4,8,IO-tetraoxaspiro(5,5)undecane.
Claim 6
Dependent Claim
20 words
Synthetic resin incorporating a stabilizer according to any of claims 1 to 4, the resin preferably being polyolefin, e.g. polypropylene.
Claim 7
Dependent Claim
45 words
A phenolic compound characterised by the general formula: wherein n' is an integer from 1 to 3, and R 1 stands for a hydrogen atom or an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms.
Claim 8
Dependent Claim
45 words
A phenolic compound characterised by the general formula: wherein n' is an integer from 1 to 3, and R 1 stands for a hydrogen atom or an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms.
Claim 9
Dependent Claim
16 words
A compound according to claim 6 which is 2,2,2-tris(3-(3 methyl-5-t-butyl-4-hydroxyphenyl)propionyloxymethyl)ethanol, 2,2,2-tris(3-(3-methyl-5-t-butyl-4-hydmxyphenyl) p r opionyloxymethyl)ethyl acetate, 2,2,2-tris(3-(3-methyl-5-t-butyl-4-hydroxyphenyl)propionyloxymethyl)-1-methoxyethane.
Claim 10
Dependent Claim
64 words
A method of producing a phenolic compound according to claim 6 characterised by reacting 3-(3-methyl-5-t-butyl-4-hydroxyphenyl)propionic acid represented by the general formula : with a pentaerythritol represented by the general formula : wherein n' is an integer of 1 to 3, R is a hydrogen otom or an alkyl group having 1 to 4 carbon atoms, and R 1 is as defined in claim 6.
Claim 11
Dependent Claim
23 words
A method according to claim 8 characterised in that the molar ratio of the pentaerythritol to the 3-(3-methyl-5-t-butyl-4-hydroxyphenyi)propionic acid is 1 : 0.5-4.
Claim 12
Dependent Claim
38 words
1 0 . A method according to claim 8 or 9 characterised in that the reaction is carried out in the presence of an acidic or basic catalyst, preferably potassium t-butoxide, sodium methoxide, sodium phenoxide or sodium hydroxide.
References Cited (Backward Citations)
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