Solvent composition
AssigneeNitto Chemical Industry Co., Ltd.
InventorsYasuyuki Takayanagi, Satoshi Endou, Naoki Sugama
Life of this patent
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Abstract
A solvent composition containing at least one of an alkyl .alpha.-alkoxyisobutyrate, an alkyl .beta.-alkoxyisobutyrate, and an alkyl .alpha.-hydroxyisobutyrate as an active component is disclosed. The solvent composition is of low toxicity and harmless to humans, has an extremely high dissolving power for high polymers, fats and oils, fluxes, liquid crystals, etc., produces no environment destructive substance, gives off no offensive odor, and has a relatively high boiling point indicative of safety and ease in handling.
Claims26
A method for dissolving a polymeric compound which comprises administering to the polymeric compound in need of such treatment an effective amount of a solvent composition comprising, as an active component, at least 5% by weight of at least one oxyisobutyric acid ester, wherein said oxyisobutyric acid ester is selected from the group consisting of an alkyl .alpha.-alkoxyisobutyrate represented by formula (I):
- ##STR4## an alkyl .beta.-alkoxyisobutyrate represented by formula (II):
- ##STR5## and an alkyl .alpha.-hydroxyisobutyrate represented by formula (III):
- ##STR6## wherein R.sup.1 and R.sup.2 each represent an alkyl group having from 1 to 4 carbon atoms.
A method for removing fats and oils on a surface which comprises administering to surface in need of such treatment an effective amount of a solvent composition comprising, as an active component, at least 10% by weight of at least one oxyisobutyric acid ester, wherein said oxyisobutyric acid ester as selected from the group consisting of an alkyl .alpha.-alkoxyisobutyrate represented by formula (I):
- ##STR7## an alkyl .beta.-alkoxyisobutyrate represented by formula (II):
- ##STR8## and an alkyl .alpha.-hydroxyisobutyrate represented by formula (III):
- ##STR9## wherein R.sup.1 and R.sup.2 each represent an alkyl group having from 1 to 4 carbon atoms.
A method for removing ink from a surface which comprises administering to a surface in need of such treatment an effective amount of a solvent composition comprising, as an active component, at least 5% by weight of at least one oxyisobutyric acid ester, wherein said oxyisobutyric acid ester is selected from the group consisting of an alkyl .alpha.-alkoxyisobutyrate represented by formula (I):
- ##STR10## an alkyl .beta.-alkoxyisobutyrate represented by formula (II):
- ##STR11## and an alkyl .alpha.-hydroxyisobutyrate represented by formula (III):
- ##STR12## wherein R.sup.1 and R.sup.2 each represent an alkyl group having from 1 to 4 carbon atoms.
A method for removing flux from a surface which comprises administering to a surface in need of such treatment an effective amount of a solvent composition comprising, as an active component, at least 5% by weight of at least one oxyisobutyric acid ester, wherein said oxyisobutyric acid ester is selected from the group consisting of an alkyl .alpha.-alkoxyisobutyrate represented by formula (I):
- ##STR13## an alkyl .beta.-alkoxyisobutyrate represented by formula (II):
- ##STR14## and an alkyl .alpha.-hydroxyisobutyrate represented by formula (III):
- ##STR15## wherein R.sup.1 and R.sup.2 each represent an alkyl group having from 1 to 4 carbon atoms.
A method for cleaning a liquid crystal cell which comprises administering to a liquid crystal cell in need of such cleaning an effective amount of a solvent composition comprising, as an active component, at least 5% by weight of at least one oxyisobutyric acid ester, wherein said oxyisobutyric acid ester is selected from the group ##STR16## consisting of an alkyl .alpha.-alkoxyisobutyrate represented by formula (I):
- ##STR17## an alkyl .beta.-alkoxyisobutyrate represented by formula (II):
- ##STR18## and an alkyl .alpha.-hydroxyisobutyrate represented by formula (III):
- ##STR19## wherein R.sup.1 and R.sup.2 each represent an alkyl group having from 1 to 4 carbon atoms.
A method for removing resist on a surface which comprises administering to a surface in need of such treatment an effective amount of a solvent composition comprising, as an active component, at least 5% by weight of at least one oxyisobutyric acid ester, wherein said oxyisobutyric acid aster is selected from the group consisting of an alkyl .alpha.-alkoxyisobutyrate represented by formula (I):
- ##STR20## an alkyl .beta.-alkoxyisobutyrate represented by formula (II):
- ##STR21## and an alkyl .alpha.-hydroxyisobutyrate represented by formula (III):
- ##STR22## wherein R.sup.1 and R.sup.2 each represent an alkyl group having from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.