Antioxidant compositions for reducing odor in warming lubricant compositions
View Patent ↗This invention relates to the clear, substantially anhydrous, warming compositions containing one or more polyhydric alcohols. The invention also relates to the compositions that include at least one or more antioxidant or antioxidants in combination selected from the group consisting of tocopherol, ascorbic acid and butylated hydroxytoluene (BHT), to prevent oxidation of polyhydric alcohol combination that results in the development of odor.
1. A substantially anhydrous lubricant composition comprising at least one polyhydric alcohol, a bioadhesive agent and at least one antioxidant, wherein said antioxidant is selected from the group consisting of tocopherol and butylated hydroxytoluene, (BHT) and combinations thereof; and wherein said compositions are substantially odor-free when stored at 40° C. for at least two weeks.
2. A substantially anhydrous lubricant composition according to claim 1 , wherein said antioxidant is dl-alpha-tocopherol.
3. A substantially anhydrous lubricant composition according to claim 1 , wherein said antioxidant is BHT.
4. A substantially anhydrous lubricant composition according to claim 1 , wherein said antioxidant is a combination ascorbic acid and BHT.
5. A substantially anhydrous lubricant composition according to claim 1 , wherein said composition does not develop odor when stored at 60° C. for at least six weeks.
6. A substantially anhydrous lubricant composition comprising at least one polyhydric alcohol, a bioadhesive agent and at least one antioxidant selected from the group consisting of tocopherol and butylated hydroxytoluene (BHT) and combinations thereof, wherein said polyhydric alcohol is selected from the group consisting of propylene glycol, polyethylene glycol, butylethylene glycol, hexylene glycol and combination thereof; and wherein said composition does not develop odor when stored at 40° C. for at least two weeks.
7. A substantially anhydrous lubricant composition according to claim 6 , where the said polyhydric alcohol is propylene glycol.
8. A substantially anhydrous lubricant composition according to claim 6 , where the said polyhydric alcohol is butylethylene glycol.
9. A substantially anhydrous lubricant composition according to claim 6 , where the said polyhydric alcohol is hexylene glycol.
10. A substantially anhydrous lubricant composition according to claim 6 , wherein said composition does not develop odor when stored at ambient room temperature (60.degree. C.) for at least for one year.
11. A substantially anhydrous lubricant composition comprising propylene glycol, a polyethylene glycol and an antioxidant selected from the group consisting of tocopherol and butylated hydroxytoluene (BHT) and combinations thereof, wherein said composition does not develop odor when stored 40° C. for at least two weeks.
12. A substantially anhydrous lubricant composition comprising at least one polyhydric alcohol, a bioadhesive agent and at least one antioxidant, wherein said antioxidant is selected from the group consisting of tocopherol and butylated hydroxytoluene, (BHT) and combinations thereof and wherein said composition does not develop odor when stored at 40° C. for at least two weeks.
13. A substantially anhydrous lubricant composition comprising at least one polyhydric alcohol, a bioadhesive agent and at least one antioxidant, wherein said antioxidant is selected from the group consisting of tocopherol and butylated hydroxytoluene, (BHT) and combination thereof and wherein said composition does not develop odor when stored at 40° C. for at least two weeks.