GB2046292A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Cleaning composition
Assignee: Imperial Chemical Industries Ltd
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Filing: 1980-02-13
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Granted: —
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Expires: 2000-02-13
Abstract
Abstract A composition for cleaning printed circuit boards contains 92 to 95 weight per cent 1,1,2-trichloro- 1,2,2-trifluoroethane, 5 to 7 weight per cent methanol and 0.05 to 1 weight per cent methyl acetate.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-11-01 16:11
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/261; C11D7/50; C11D7/5004; C11D7/5018; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5086; C11D7/266; C11D7/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
36 words
A cleaning composition characterised in that it comprises 92 to 95 weight per cent of 1,1 ,2-trichloro-1 2,2-trifluoroethane, 5 to 7 weight per cent of methanol and 0.05 to 1 weight per cent of methyl acetate.
Claim 2
Dependent Claim
36 words
A cleaning composition characterised in that it comprises 92 to 95 weight per cent of 1,1 ,2-trichloro-1 2,2-trifluoroethane, 5 to 7 weight per cent of methanol and 0.05 to 1 weight per cent of methyl acetate.
Claim 3
Dependent Claim
32 words
A cleaning composition according to claim 1 characterised in that it contains approximately 93.5 weight per cent 1,1,2-tri chloro-1 2,2-trifluorothanes, 6.3 weight per cent methanol and 0.2 weight per cent methyl acetate.
Claim 4
Dependent Claim
22 words
Cleaning composition according to claim 1 or claim 2 characterised in that it also contains 0.02 to 1 weight per cent nitromethane.
Claim 5
Dependent Claim
18 words
A cleaning composition according to claim 3 characterised in that it contains approximately 0.05 weight per cent nitromethane.
Claim 6
Dependent Claim
38 words
A cleaning composition according to claim characterised in that it contains 93.5 weight per cent 1 , 1 ,2-trichloro-1 ,2,2-trifluoro- ethane, 6.5 weight per cent methanol, 0.03 weight per cent methyl acetate and 0.06 weight per cent nitromethane.
Claim 7
Independent Claim
28 words
A method characterised by incorporating methyl alcohol, methyl acetate and if desired nitromethane into 1,1,2-trichloro 1 2,2-trifluoroethane in the proportions as described in any of the preceding claims.
Claim 8
Independent Claim
27 words
A method of cleaning contaminated articles characterised by bringing them into contact with the cleaning compositions as described in any of the preceding claims 1 to 5.
References Cited (Backward Citations)
No citation records indexed.
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