US4810786A
Expired / Lapsed
US
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Stabilization of xanthan gum in aqueous solution
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-04-08
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Granted: 1989-03-07
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Expires: 2006-04-08
Abstract
Abstract A method of stabilizing an aqueous solution of xanthan gum is disclosed, comprising incorporating at least one stabilizing agent selected from thiol derivatives of heterocyclic compounds in an aqueous solution of xanthan gum.
Inventors
- 👤 Shoichi Kanda
- 👤 Zengiro Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/45; C08K5/46; C08K5/47
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A process of stabilizing an aqueous solution of xanthan gum which comprises incorporating at least one stabilizing agent selected from the group consisting of (A) 2-mercaptobenzothiazole and derivatives thereof represented by the formula (I): ##STR2## wherein R 1 , R 2 , R 3 and R 4 each represents a hydrogen atom, a methyl group or an ethyl group; and X represents a hydrogen atom, an alkali metal or ammonium, (B) 2-thioimidazolidone represented by the formula (II): ##STR3## (C) 2-mercaptothiazoline represented by the formula (III): ##STR4## (D) benzoxazole-2-thiol and salts thereof represented by the formula (IV): ##STR5## wherein X is as defined above, (E) N-pyridineoxide-2-thiol and salts thereof represented by the formula (V): ##STR6## wherein X is as defined above, (F) 1,3,4-thiadiazole-2,5-dithiol and salts thereof represented by the formula (VI): ##STR7## wherein X is as defined above, and (G) 4-ketothiazolidine-2-thiol and salts thereof represented by the formula (VII): ##STR8## wherein X is as defined above, in an aqueous solution of xanthan gum.
Claim 2
Dependent Claim
162 words
A process of stabilizing an aqueous solution of xanthan gum which comprises incorporating at least one stabilizing agent selected from the group consisting of (A) 2-mercaptobenzothiazole and derivatives thereof represented by the formula (I): ##STR2## wherein R 1 , R 2 , R 3 and R 4 each represents a hydrogen atom, a methyl group or an ethyl group; and X represents a hydrogen atom, an alkali metal or ammonium, (B) 2-thioimidazolidone represented by the formula (II): ##STR3## (C) 2-mercaptothiazoline represented by the formula (III): ##STR4## (D) benzoxazole-2-thiol and salts thereof represented by the formula (IV): ##STR5## wherein X is as defined above, (E) N-pyridineoxide-2-thiol and salts thereof represented by the formula (V): ##STR6## wherein X is as defined above, (F) 1,3,4-thiadiazole-2,5-dithiol and salts thereof represented by the formula (VI): ##STR7## wherein X is as defined above, and (G) 4-ketothiazolidine-2-thiol and salts thereof represented by the formula (VII): ##STR8## wherein X is as defined above, in an aqueous solution of xanthan gum.
Claim 3
Dependent Claim
26 words
A process as in claim 1, wherein the aqueous solution of xanthan gum has a xantham gum concentration of from about 0.0001 to 10% by weight.
Claim 4
Dependent Claim
26 words
A process as in claim 2, wherein the aqueous solution of xanthan gum has a xanthan gum concentration of from about 0.0001 to 5% by weight.
Claim 5
Dependent Claim
31 words
A process as in claim 1, wherein the stabilizing agent is used in an amount of from 0.05 to 20 parts by weight per 100 parts by weight of xanthan gum.
References Cited (Backward Citations)
US4607099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |