Tea extract

Patent metadata

Field	Value
Publication number	US-9414613-B2
Application number	US-51851909-A
Country	US
Kind code	B2
Filing date	Dec 28, 2006
Priority date	Dec 28, 2006
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

This invention relates to a tea extract, which is reduced in bitterness, sourness and coarse taste, has a good affinity with various beverages, and contains non-polymer catechins that are highly stable in a sterilized beverage to which the tea extract is added.
A purified tea extract, including:
(1) non-polymer catechins (a) in a solid content accounting for from 45 to 90 wt. %; (2) a percentage of gallate body in the non-polymer catechins being from 0.001 to 47 wt. %; and (3) a weight ratio of a gallic acid/the non-polymer catechins being not greater than 0.3.

First claim

The invention claimed is:

1. A purified tea extract, comprising non-polymer catechins;
wherein
a content of the non-polymer catechins in a solid content of the purified tea extract is from 45 to 90 wt. %,
percent by weight of gallate body in the non-polymer catechins is from 0.001 to 35 wt. %, and
a weight ratio of gallic acid/non-polymer catechins is not greater than 0.07.

2. The purified tea extract according to claim 1 , wherein a weight ratio of free amino acids/non-polymer catechins in the purified tea extract is not greater than 0.08.

3. The purified tea extract according to claim 1 , wherein a weight ratio of (sucrose+glucose)/non-polymer catechins in the purified tea extract is not greater than 0.15.

4. The purified tea extract according to claim 1 , wherein a weight ratio of caffeine/non-polymer catechins in the purified tea extract is not greater than 0.2.

5. The purified tea extract according to claim 1 , wherein the purified tea extract is a green tea extract.

6. A food comprising the purified tea extract according to claim 1 .

7. A beverage comprising the purified tea extract according to claim 1 .

8. The purified tea extract according to claim 2 , wherein a weight ratio of (sucrose+glucose)/non-polymer catechins in the purified tea extract is not greater than 0.15.

9. The purified tea extract according to claim 2 , wherein a weight ratio of caffeine/non-polymer catechins in the purified tea extract is not greater than 0.2.

10. The purified tea extract according to claim 3 , wherein a weight ratio of caffeine/non-polymer catechins in the purified tea extract is not greater than 0.2.

11. The purified tea extract according to claim 1 , wherein the non-polymer catechins is a catechin or catechin mixture consisting of at least one material selected from the group consisting of a catechin, a gallocatechin, a catechingallate, a gallocatechingallate, a epicatechin, a epigallocatechin, a epicatechingallate and a epigallocatechingallate.

12. The purified tea extract according to claim 1 , wherein the gallate body consists of at least one material selected from the group consisting of an epigallocatechingallate, a gallocatechingallate, an epicatechingallate and a catechingallate.

13. The purified tea extract according to claim 1 , wherein said solid content of the purified tea extract is from 50 to 88 wt. %.

14. The purified tea extract according to claim 1 , wherein said solid content of the purified tea extract is from 55 to 85 wt. %.

15. The purified tea extract according to claim 1 , wherein said solid content of the purified tea extract is from 60 to 83 wt. %.

16. The purified tea extract according to claim 1 , wherein the percent by weight of the gallate body in the non-polymer catechins is from 0.01 to 35 wt. %.

17. The purified tea extract according to claim 1 , wherein the percent by weight of the gallate body in the non-polymer catechins is from 0.1 to 35 wt. %.

18. The purified tea extract according to claim 1 , wherein the percent by weight of the gallate body in the non-polymer catechins is from 1 to 35 wt. %.

19. The purified tea extract according to claim 1 , wherein the percent by weight of the gallate body in the non-polymer catechins is from 5 to 35 wt. %.

Assignees

• Sato Hitoshi
• Ueoka Hideaki
• Shibata Keiji
• Kao Corp

Inventors

• Sato Hitoshi
• Ueoka Hideaki
• Shibata Keiji

Classifications

• A23L1/3002

  Human Necessities · mapped topic

• A23V2250/2116

  Flavonoids, isoflavones · CPC title

• A23F5/243

  Liquid, semi-liquid or non-dried semi-solid coffee extract preparations; Coffee gels; Liquid coffee in solid capsules (A23F5/246 takes precedence) · CPC title

• A23V2002/00

  Food compositions, function of food ingredients or processes for food or foodstuffs · CPC title

• A23F3/205

  Using flocculating or adsorbing agents · CPC title