Sugar compounds, gelling agents, gelling agent compositions processes for the preparation of them, and gel compositions
AssigneeNew Japan Chemical Co., Ltd.
InventorsToshiaki Kobayashi, Kenshi Ando, Harutomo Nomoto
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Abstract
The invention provides a gelling agent comprising at least one sugar compound selected from the group consisting of sugar compounds represented by the formula (1) and sugar compounds represented by the formula (2). wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, and p is 0 or 1. The gelling agent of the invention is very useful as a gelling agent for an aqueous medium.
Claims23
A sugar compound represented by the formula (1) or the formula (2)
- wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, and p is 0 or 1.
A process for preparing a sugar compound of the formula (1) or the formula (2), the process comprising the step of subjecting a sugar alcohol (A) and a benzaldehyde derivative (B) to dehydration condensation in water or in an organic solvent, said sugar alcohol (A) being at least one member selected from the group consisting of sorbitols and xylitols, and said benzaldehyde derivative (B) being at least one member selected from the group consisting of 3,4-disubstituted benzaldehyde represented by the formula (3) and dialkyl ether of 3,4-disubstituted benzaldehyde represented by the formula (4), the molar ratio (A/B) of the sugar alcohol (A) to the benzaldehyde derivative (B) being 2/1 to 1/2:
- wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, R3 represents an alkyl group having 1 to 4 carbon atoms, and p is 0 or 1.
An organic gelling agent comprising at least one sugar compound selected from the group consisting of sugar compounds represented by the formula (1) and sugar compounds represented by the formula (2):
- wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, and p is 0 or 1.
A gel comprising an aqueous medium and an organic gelling agent comprising at least one sugar compound selected from the group consisting of sugar compounds represented by the formula (1) and sugar compounds represented by the formula (2):
- wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, and p is 0 or 1.
A process for preparing a gel comprising dissolving an organic gelling agent comprising at least one sugar compound selected from the group consisting of sugar compounds represented by the formula (1) and sugar compounds represented by the formula (2) in an aqueous medium with heating to give a solution and cooling said solution:
- wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, and p is 0 or 1.
A process for preparing a gelling agent composition, the process comprising the steps of preparing a gel from at least one sugar compound selected from the group consisting of sugar compounds represented by the formula (1) and sugar compounds represented by the formula (2), a dispersant and a medium, and removing the medium from the gel:
- wherein R1 and R2 are the same or different and each represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms or a halogen atom, and p is 0 or 1.
Dependencies are inferred from the claim text.