Patent EP0206418A2 successfully refreshed from Google Patents.
EP0206418A2
Expired / Lapsed
EP
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Dry bleach and stable enzyme granular composition
Assignee: Procter and Gamble Co
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Filing: 1986-06-18
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Granted: —
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Expires: 2006-06-18
Abstract
Abstract This invention relates to an enzyme and peroxyacid bleach granular composition comprising (1) a homogeneously mixed granulate of enzymes and alkaline buffer salt to protect the enzymes from deactivation when mixed with (2) a strong peroxyacid bleach granulate. This composition can also contain detergent surface-active agents, water-soluble builder salts, and other ingredients commonly used in detergents and laundry additive products.
Inventors
- 👤 Robert William Herdeman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 22:04
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38672; C11D3/39; C11D3/3945
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
118 words
A storage stable granular composition comprising: (I) an enzyme granulate including a homogeneous mixture of 0.5% to 20% raw enzyme, 3% to 97.5% alkaline buffer salt material, 2% to 40% cellulosic filler and binder, with said enzyme having an activity of about 0.25-10 Au/gram, and (II) a peroxyacid bleach granulate, . wherein said (I) and (II) have a weight ratio of from about 1: to about 1:1500; wherein said alkaline buffer salt material has a pH of from 7 to 11; wherein said raw enzyme and said alkaline buffer salt material have a weight ratio of from 1:4 to 1:200; wherein said cellulosic filler and binder of said (I) have a weight ratio of about 1:1 to 10:1.
Claim 2
Dependent Claim
118 words
A storage stable granular composition comprising: (I) an enzyme granulate including a homogeneous mixture of 0.5% to 20% raw enzyme, 3% to 97.5% alkaline buffer salt material, 2% to 40% cellulosic filler and binder, with said enzyme having an activity of about 0.25-10 Au/gram, and (II) a peroxyacid bleach granulate, . wherein said (I) and (II) have a weight ratio of from about 1: to about 1:1500; wherein said alkaline buffer salt material has a pH of from 7 to 11; wherein said raw enzyme and said alkaline buffer salt material have a weight ratio of from 1:4 to 1:200; wherein said cellulosic filler and binder of said (I) have a weight ratio of about 1:1 to 10:1.
Claim 3
Dependent Claim
35 words
The granular composition of Claim 1 wherein said alkaline buffer salt material is selected from the group consisting of potassium bicarbonate, potassium carbonate, tetrapotassium pyrophosphate, tripotassium polyphosphate, sodium bicarbonate and sodium carbonate, preferably potassium bicarbonate.
Claim 4
Dependent Claim
49 words
The granular composition of Claim 1 wherein said alkaline buffer salt material includes an antioxidant inorganic salt selected from the group consisting of sodium sulfite, sodium bisulfite and sodium thiosulfate, and mixtures theeof, wherein said antioxidant to alkaline buffer salt have a weight ratio of from 10:1 to 1:50.
Claim 5
Dependent Claim
48 words
The granular composition of Claim 1, 2 or 3 wherein said (I) and said (II) have a weight ratio of 1:3 to 1:30 and said pH is 8 to 10 and said raw enzyme and said alkaline buffer salt material have a weight ratio of 1:6 to 1:100.
Claim 6
Dependent Claim
27 words
The granular composition of Claim 1, 2 or 3 wherein said raw enzyme and said alkaline buffer salt material have a weight ratio of 1:20 to 1:50.
Claim 7
Dependent Claim
58 words
The granular composition of Claim 1, 2 or 3 wherein said enzyme granulate is coated with a protective coating containing an effective amount of alkaline buffer salt material having a pH of from about 7 to about 11; said protective coating surrounding said enzyme granulate and providing improved enzyme stability in the presence of said peroxyacid bleach granulate.
Claim 8
Dependent Claim
24 words
The granular composition of Claim 6 wherein said protective coating is from about 10% to about 67% by weight of said coated enzyme granulate.
Claim 9
Dependent Claim
28 words
The granular composition of Claim 6 wherein said protective coating surrounding said enzyme granulate is from about 50% to about 80% by weight of said coated enzyme granulate.
Claim 10
Dependent Claim
23 words
The granular composition of Claim 6 wherein said protective coating contains 50% to 100% alkaline buffer salt by weight of said protective coating.
Claim 11
Dependent Claim
65 words
The granular composition of Claims 6 wherein said protective coating contains 50-100% alkaline buffer salt by weight of said protective coating, and wherein when said alkaline buffer salt is present at a level of from about 5% to about 10% by weight of said enzyme granulate, and wherein the balance of said protective coating is selected from antioxidants, calcium chloride and other compatible inorganic salts.
Claim 12
Dependent Claim
34 words
The granular composition of Claim 6 wherein said alkaline buffer salt material protective coating having a pH of 8-10, said enzyme granulate to said protective coating havs a ratio of from 4:1 to 1:1.
Claim 13
Dependent Claim
51 words
The granular composition of Claim 1, 2 or 3 wherein antioxidant is present at a level of 1% to 40% by weight of said enzyme granulate and said alkaline buffer salt is present at an effective level to stabilize said enzyme from rapid deactivation in the presence of peroxyacid bleach granulate.
Claim 14
Dependent Claim
24 words
The granular composition of Claim 12 wherein said antioxidant is present at a level of 2% to 30% by weight of said enzyme granulate.
Claim 15
Dependent Claim
28 words
The granular composition of Claim 6 wherein said protective coating is a mixture of alkaline buffer salt and antioxidant, said coating having a pH of 8 to 10.
Claim 16
Dependent Claim
57 words
The granular composition of Claim 6 wherein said alkaline buffer salt is selected from the group consisting of potassium bicarbonate, potassium carbonate, tetrapotassium pyrophosphate, tripotassium polyphosphate, sodium bicarbonate and sodium carbonate, and mixtures thereof, said alkaline buffer salt in said protective coating is present at a level of 5% to 50% by weight of said enzyme granulate.
Claim 17
Dependent Claim
37 words
The granular composition of Claim 1, 2 or 3 wherein said enzyme granulate contains calcium ion selected from calcium sulfate or calcium chloride at a level of 40 to 3000 ppm by weight of said enzyme granulate.
Claim 18
Dependent Claim
31 words
The granular composition of Claim 1, 2 or 3 wherein said enzyme granulate is surrounded with a coating of water-soluble nonionic wax having a melting point of at least about 38°C.
Claim 19
Dependent Claim
43 words
The granular composition of Claim 1, 2 or 3 wherein said enzyme granulate includes a nonionic waxy coating at a level of from about 5% to about 57% by weight of said enzyme granulate, and has a melting point of at least 50°C.
Claim 20
Dependent Claim
30 words
The granular composition of Claim 18 wherein said coating of said water-soluble nonionic waxy coating is present at a level of 10% to 30% by weight of said enzyme granulate.
Claim 21
Dependent Claim
27 words
The granular composition of Claim 18 wherein said water-soluble nonionic waxy coating is present at a level of 15% to 25% by weight of said enzyme granulate.
Claim 22
Dependent Claim
42 words
The granular composition of Claim 17 wherein said nonionic wax is selected from the group consisting of: fatty alcohols, ethoxylated fatty alcohols, higher fatty acids, mono-, di- and triglycerolesters of fatty acids, e.g., glycerol monostearate, alkylarylethoxylates and coconut monoethanolamide, and mixtures thereof.
Claim 23
Dependent Claim
25 words
The granular composition of Claim 21 wherein said nonionic wax is selected from the group consisting of: TAE 22 , PEG 1500-8000 and palmitic acids.
References Cited (Backward Citations)
No citation records indexed.
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