WO1996013486A1 - Compacting halohydantoin and fatty amide and product therefrom - Google Patents
Compacting halohydantoin and fatty amide and product therefrom Download PDFInfo
- Publication number
- WO1996013486A1 WO1996013486A1 PCT/US1995/014372 US9514372W WO9613486A1 WO 1996013486 A1 WO1996013486 A1 WO 1996013486A1 US 9514372 W US9514372 W US 9514372W WO 9613486 A1 WO9613486 A1 WO 9613486A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fatty amide
- composition
- halohydantoin
- group
- methyl
- Prior art date
Links
- 0 CC(*)(*C(*1*)=O)C1=O Chemical compound CC(*)(*C(*1*)=O)C1=O 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
Definitions
- N-halohydantoin compounds are used commercially in industrial and recreational water treatment to provide biocidal action and to control bacterial growth. Recently, these compounds have also been used in household automatic toilet bowl cleaners. Examples of N-halohydantoins currently being used in these applications include N,N' -dichloro- and N,N'- dibromo- derivatives, as well as mixtures of N,N'-chloro and - bro o derivatives.
- N-halohydantoin compounds are typically produced as solid particulates. They are often compacted by mechanical pressure into forms such as briquettes, tablets and pucks. These "compacts" are normally subjected to various stresses and shocks during packaging, transport and end-use. Because of this, it is highly desirable to have a composition for compaction that not only molds easily, but better withstands stresses and shocks.
- U. S. 3,412,021 teaches using polymers as binders, with copious amounts of water, to form l-bromo-3-chloro-5,5- dimethylhydantoin into sticks or rods.
- a paste is made that consists of at least 25% water.
- excess water renders the polymers inactive, thereby preventing curing.
- the resulting compacts are not acceptable.
- compacts formed by this process are not as hard as is desirable, unless a post-application drying process is performed. The cost of evaporating water to make an acceptable product is prohibitive.
- U. S. 4,677,130 describes adding dry, particulate alkali metal or alkaline earth metal salts to N-halohydantoins, and then compacting.
- Canadian patent 1,230,825 describes the use of borax (e.g. Na 2 B 4 0 7 .5H 2 0) as a binder for N-halogenated hydantoins. Adding borax produces tablets that are essentially dust-free, have a high minimum break strength, and have dissolution characteristics that can be modified by varying the amount of borax.
- a separate additive such as stearic acid or sodium stearate, is required to lubricate die surfaces. Such additives melt at low temperature (e.g. 55-65°C) , resulting in a markedly lower decomposition temperature for the compacted products.
- the invention relates to a composition for compaction comprising an N- halohydantoin and an effective amount of a saturated, normally solid, fatty amide binder.
- the invention relates to a method for forming compacted N- halohydantoin wherein the N-halohydantoin is mixed with the fatty amide, and then compressed to form a compacted product.
- the invention relates to the compacted product of N-halohydantoin and fatty amide.
- Figure 1 is a graph of tablet friability for tablets containing different ratios of N-halohydantoin to fatty amide.
- Figure 2 is a graph of tablet hardness for tablets containing different ratios of N-halohydantoin to fatty amide.
- Figure 3 is a graph showing the dissolution rate of N-halohydantoin tablets containing different ratios of N- halohydantoin to fatty amide.
- Saturated, normally solid, fatty amide waxes can be used to compact halohydantoins to provide stable final forms.
- Conventional compacted forms, including tablets, briquettes and pucks, can be made using this invention.
- the word “compacted, " however, is also intended to encompass any other products that result from the compression of N-halohydantoins, such as, granules, sticks, and other agglomerates.
- Normally solid refers to fatty amides that are solid at room temperature.
- the compacted forms according to the invention show markedly increased resistance to crumbling and breakage. Additionally, they show better thermal stability than those made with, for example, alkaline earth metal salts such as magnesium stearate (a conventional binder/lubricant used in N- halohydantoin forming operations) .
- alkaline earth metal salts such as magnesium stearate (a conventional binder/lubricant used in N- halohydantoin forming operations) .
- N-halohydantoin compounds of the formula shown can be used in this invention.
- R, and R 2 are independently selected from alkyl groups (having from 1 to 12 carbons) , and Xj and X 2 are independently selected from bromine, chlorine and hydrogen, at least one of X j and X 2 being halogen.
- R is methyl and R 2 is either methyl or ethyl.
- Preferred halohydantoins include 1, 3-dichloro-5, 5-dimethylhydantoin; 1, 3-dibromo-5,5- dimethylhydantoin; and combinations of these derivatives.
- Another preferred embodiment includes a mixture of halogen derivatives of 5-methyl-5-ethylhydantoin, such as, the mixtures currently sold under the tradenames Dantobrom ® RW and Dantochlor ® .
- saturated, normally solid, fatty amides which may be combined with N-halohydantoins include primary fatty amides having from 6 to 22 carbons, such as stearamide, palmitamide, caprylamide, lauramide, and behenamide, and secondary fatty amides.
- secondary fatty amides that are the reaction products of ethylenediamine and fatty acids containing from 6 to 22 carbons.
- Most preferred of this type are ethylenebiss eara ide (EBS) , and ethylenebisisostearamide.
- EBS ethylenebiss eara ide
- Ethylenebisamides canbe synthesized from a variety of fatty acids and ethylenediamine. All have exceptionally high melting points for organic waxes and, interestingly, increase in melting point with decreasing molecular weight.
- melting points increase from 124°C for ethylene [N-stearamide, N' - cyclohexyl (methoxamide) ] to a high of 166°C for ethylene biscapryla ide.
- the amount of fatty amide is preferably from about 0.1% to about 25% by weight. In a preferred embodiment, the amount of fatty amide is about 10% by weight.
- the fatty amide may be conventionally mixed with the N-halohydantoin using a commercially available mixer.
- mixers are a V cone blender (Paterson-Kelley) , a "Henschel” type mixer, a ball mill, and a rotary cone tumbler.
- other additives may be employed, including inorganic salts such as borate and calcium chloride.
- To compact the blended mixture conventional equipment, such as a briquettor, pelletizor, granulator (Chilsinator) , punch press, "Carver” type press, “Bepex” type compactor, or rotary tablet press, may be used.
- a pre-compaction step to produce a granular product may be employed. For example, corrugated sheets may be formed, and then broken up to form granules. Also, if desired, the compacted product may be broken into a specific screen size and used for subsequent compaction.
- EXAMPLE 2 DCDMH/DCEMH and EBS were compacted to form 10 g tablets at the following ratios: 100:0; 98:2; 95:5; 90:10; 80:20; and 50:50. Each tablet was placed in a separate jar and then fastened to a rotary apparatus which tumbled the tablets for three hours. Samples were taken every twenty minutes for the first hour and hourly thereafter.
- Example 2 Each tablet from Example 2 was evaluated for hardness using an InstronTM multipurpose tester.
- Figure 2 indicates the relative hardness of each compact. As shown, tablet hardness increased dramatically with only small additions of EBS.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Inorganic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95940617A EP0788485A4 (en) | 1994-10-27 | 1995-10-27 | Compacting halohydantoin and fatty amide and product therefrom |
AU42305/96A AU4230596A (en) | 1994-10-27 | 1995-10-27 | Compacting halohydantoin and fatty amide and product therefrom |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US330,251 | 1994-10-27 | ||
US08/330,251 US5565576A (en) | 1994-10-27 | 1994-10-27 | Halohydantoin and fatty amide composition for compaction, process of compacting and product produced thereby |
US33025195A | 1995-10-27 | 1995-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996013486A1 true WO1996013486A1 (en) | 1996-05-09 |
Family
ID=26987188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1995/014372 WO1996013486A1 (en) | 1994-10-27 | 1995-10-27 | Compacting halohydantoin and fatty amide and product therefrom |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1996013486A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4532330A (en) * | 1982-09-30 | 1985-07-30 | Great Lakes Chemical Corporation | Process for producing densified halogenated dimethylhydantoins |
US4560766A (en) * | 1983-02-02 | 1985-12-24 | Glyco Chemicals, Inc. | Shaped halogenated hydantoins |
US4677130A (en) * | 1985-10-07 | 1987-06-30 | Great Lakes Chemical Corporation | Process of densification of N-halohydantoin compositions and products thereof |
US4745189A (en) * | 1986-06-23 | 1988-05-17 | Ethyl Corporation | Method of preparing N-halogenated organic heterocyclic compounds |
-
1995
- 1995-10-27 WO PCT/US1995/014372 patent/WO1996013486A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4532330A (en) * | 1982-09-30 | 1985-07-30 | Great Lakes Chemical Corporation | Process for producing densified halogenated dimethylhydantoins |
US4560766A (en) * | 1983-02-02 | 1985-12-24 | Glyco Chemicals, Inc. | Shaped halogenated hydantoins |
US4677130A (en) * | 1985-10-07 | 1987-06-30 | Great Lakes Chemical Corporation | Process of densification of N-halohydantoin compositions and products thereof |
US4745189A (en) * | 1986-06-23 | 1988-05-17 | Ethyl Corporation | Method of preparing N-halogenated organic heterocyclic compounds |
Non-Patent Citations (1)
Title |
---|
See also references of EP0788485A4 * |
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