GB2543552A

GB2543552A - Combustible insecticide product

Info

Publication number: GB2543552A
Application number: GB1518707.3A
Authority: GB
Inventors: Jain Kapil; Kumar Kartik; Kumar Makkapati Anil; Walker Clare
Original assignee: Reckitt Benckiser Brands Ltd
Current assignee: Reckitt Benckiser Brands Ltd
Priority date: 2015-10-22
Filing date: 2015-10-22
Publication date: 2017-04-26
Also published as: MX2018004999A; AU2016342551B2; AU2016342551A1; WO2017068345A1; GB201518707D0; EP3364758A1; BR112018007985A2; CN108366556A

Abstract

An insecticide product comprising: a flexible rope with a width between 2-25mm, an active insecticide and a smouldering agent. The rope has a weight between 1-500 grams per metre, a density of 0.01-5 grams per centimetre cubed and has a circular cross section. The rope further comprises of woven strands of textile fabrics and at least one rolled paper strand, wherein the paper has a basis weight of between 20-250 gsm. The active insecticide comprises a pyrethroid which comprises between 0.1-5% by weight of the insecticide product. The smouldering agent comprises of potassium nitrate and has a range between 0.1-10% by weight of the insecticide product.

Description

Combustible insecticide product

Background

This invention relates to combustible products that emanate an insecticide into the atmosphere on combustion and more particularly to such products that undergo combustion for a prolonged period thereby providing an extended time period of insecticide activity.

There are several different types of insecticide products that rely only on combustion as a source of energy to be effective.

The most commonly used of these are commonly referred to as “mosquito coils” or even more simply as “coils”. Typically, mosquito coils are used in environments where persons sleep and are therefore unable to destroy mosquitoes before being bitten. Another usage is environments where infants or others incapable or having a limited ability of destroying attacking mosquitoes are placed.

It will be readily appreciated that mosquitoes are vectors for a number of particularly persistent and often life-threatening or at least debilitating diseases.

Most significant among these diseases is malaria. It is therefore highly desirable to prevent mosquito bites as a means of preventing the contracting of such diseases.

Mosquitoes are particularly prevalent in tropical and sub-tropical regions.

Many of these regions include countries with relatively low per capita incomes. It is therefore desirable to be able to provide insecticidal products that are highly cost effective.

In general terms, traditional mosquito coils fulfil this role. They are relatively easy to form and include low cost ingredients. As emanation of the insecticide is only dependant on combustion of the coil, the only source of energy required is sufficient heat to initially ignite a coil to cause it to combust.

Coils have a number of drawbacks however. They are often brittle and suffer breakage. They often produce a great deal of smoke along with the heat needed to volatilise the insecticide. Also once broken, the coil will cease to burn and protection from mosquitos will cease. This is particularly a problem when protection is sought overnight.

Another popular combustible insecticide product format are paper based. An example is Mortein Activcard These products consist of a paper sheet impregnated with an insecticide active and a smouldering agent. These products are cheap to produce and can be highly effective. They are consumed in a smouldering flame within a 3 minutes and can provide protection for an average size room for 4 hours.

The paper products have a number of drawbacks however. They are extremely light and can be blown very easily around when lit causing a fire hazard. They also suffer from a believability gap. Many consumers simply do not believe the product continues to work for long once the paper has ceased burning.

It is the aim of the present invention to obviate some of the problems associated generally with combustible insecticide products.

Statements of invention

According to the present invention there is provided an insecticide product comprising a combustible support; an active insecticide, and a smouldering agent; where in the combustible support comprises a flexible rope with a width of between 2 and 25mm.

In a further embodiment the rope has a weight of between 01 and 500 grams per metre.

In a further embodiment the rope preferably has a weight of between 01 and 150 grams per metre.

In a further embodiment the rope has a density of between 0.01 and 5 grams per centimetre cubed.

In a further embodiment the rope has an essentially circular cross section.

In a further embodiment the product comprises two or more active insecticides.

In a further embodiment the active insecticide comprises a pyrethroid.

In a further embodiment the active insecticide comprises between 0.1 and 20 % by weight of the insecticide product.

In a further embodiment the active insecticide preferably comprises between 0.5 and 5 % by weight of the insecticide product.

In a further embodiment the smouldering agent comprises potassium nitrate.

In a further embodiment the potassium nitrate comprises between 0.1 and 10% by weight of the insecticide product.

In a further embodiment the rope comprises textile fibres.

In a further embodiment the rope comprises woven strands of textile fibres.

In a further embodiment the rope comprises at least one rolled paper strand.

In a further embodiment the rolled paper has a density of between 20 and 250 gsm.

Detailed description of the invention

The present invention describes a combustible insecticide product that attempts to overcome some of the problems inherent with those of the currently available products.

The product of the invention is a combustible rope. The rope may have a thickness of between 3 and 15 mm, preferably between 4 and 12 mm and most preferably between 5 and 8mm.

The length and thickness of the rope provided will depend on the burning time required and may be adjusted for this purpose.

It is possible that different lengths may be provided for the user to select protection time required. It may be that the rope may be provided in a single long coil and the user will cut the rope to the desired lengths before use.

The rope products may have a weight of between 1 and 500 grams per metre. Preferably the rope products may have a weight of between between 1 and 150 grams per metre.

The rope products may have a density between 0.01 and 5 grams per metre cubed. The rope products preferably have a density of between 0.1 and 3 grams per metre cubed

The rope has the advantage over coils of being flexible and not prone to breakage. (Coils are most often moulded products). The rope has the advantage over paper products of being more substantial and less likely to be blown away. Also the rope will smoulder for much longer that a paper product and will provide the user with more reassurance that it is working. Another further advantage of the ropes is low ash generation on burning, and are therefore much less messy.

The rope may be formed of any suitable combustible material. Preferably the material used is either a textile material or a paper material.

The textile material if used, may comprise woven or non-woven materials. Preferably the textile may be prepared from natural fibres like cotton. The rope may consist of a single strand of textile but preferably may be formed from the winding together of two or more strands of textiles, more preferably from the winding together or three or more strands of textiles.

The paper maybe of any type suitable for rolling into a rope form. The thinner and stronger (high tensile strength)the paper the more flexible the rope will be. The thicker the paper the more stiff the final rope will be.

Thicker paper will yield rope products that are stick like in appearance and strength.

The paper used to make the rope products of the present invention may have a basis weight of between 20 and 300 gsm. Preferably a basis weight between 50 and 200 gsm and most preferably a basis weight between 70 and 140 gsm.

The burning time of the rope will be dependent on a range of factors, the material chosen for the rope, the density of the rope, the thickness of the rope, the quantity of flame limiting chemicals and the length of the rope. The present invention therefore gives the skilled person the possibility of fine tuning the burning time in a number of ways.

The rope products of the present invention will preferably have a burning time of between 10 mins and 6 hours. Preferably the ropes of the present invention will have a burning time of between 20 min and 4 hours and most preferably the ropes of the present invention will have a burning time of between 30 min and 2 hours.

It is preferred that the rope products of the present invention provide effective insecticide performance for at least 4 hours from initial combustion. Preferably the rope products provide effective insecticide performance for at least five, more preferably at least six hours.

The rope products of the present invention preferably give off very low quantities of smoke when burning.

The rope products may be burned from any surface. They may require a stand if in stick shape, for other shapes stands may or may not be required.

The rope products of the present invention also gives the skilled person and end user greater flexibility in choice of aesthetic form than either a coil or a paper. Each rope may be twisted into many different shapes. Or made stiff and stick like.

The cross section of the ropes may form any shape desired. The preferred shape is a circular cross section.

The insecticide products of the present invention require an active insecticide substance.

The products may comprise a single active substance or a mixture of two or more insecticide actives.

The insecticide products of the present invention preferably have an active insecticide substance selected from the group consisting of the pyrethroids, in particular selected from the group consisting of acrinathrin, allethrin, d-allethrin, d-frans-allethrin, d-c/s-trans-allethrin,alphamethrin, bathrin, bifenthrin, bioallethrin, S-bioallethrin, bioallethrin S-cyclopentyl isomer, bioethanomethrin, biopermethrin, bioresmethrin, clocythrin, chlovaporthrin, cycloprothrin, cyfluthrin, beta-cyfluthrin, cyhalothrin, gamma-cyhalothrin, lambda-cyhalothrin, cypermethrin, alphacypermethrin, beta-cypermethrin, cis-cypermethrin, theta-cypermethrin, zeta-cypermethrin, cyphenotrin, deltamethrin, depallethrin, empenthrin, empenthrin (1R isomer), esbiothrin, esfenvalerate, etophenprox, fenfluthrin, fenpropathrin, fenpyrithrin, fenvalerate, flubrocythrinate, flucythrinate, flumethrin, fubfenprox, imiprothrin, kadethrin, metofluthrin, neopynamine, permethrin, cispermethrin, trans-permethrin, phenothrin, phenothrin (IR-trans isomer), d-phenothrin, prallethrin, profluthrin, protrifenbute, pynamin forte, pyresmethrin, pyrethrin, resmethrin, cis-resmethrin, silafluofen, tau-fluvalinate, tefluthrin, tetramethrin (phthalthrin), tetramethrin (1R isomer),terallethrin, tralomethrin, transfluthrin, metofluthrin, pyrethrins (pyrethrum) and any mixture of the abovementioned substances.

Particularly preferred actives include transfluthrin, metofluthrin and biothrin. A mixture of both natural and manmade insecticide substances may be used. Examples of natural insecticide substances include citronella and neem.

The insecticide product may include the active insecticide between 0.1 and 20% by weight of the final rope product. Preferably the active will be between 0.5 and 5% by weight of the final rope product.

The skilled person will be able to determine the precise loading required for effective insect control based on the performance of the active selected for use and size of room required to protect.

The active ingredients may be provided to the surface of the rope by painting, spraying coating, dipping or printing etc.

The active ingredients may also have been applied to the base material of the rope prior to the formation of the end product. If the product is to be formed from paper then the paper maybe coated or soaked in the active prior to rolling into a rope form. If the rope is to be formed from textile then the textile may likewise be pretreated with active prior to the forming of the rope.

The product of the present invention comprises a smouldering agent to reduce flame production on burning.

Preferably the smouldering agent used will be an alkali or alkaline earth metal nitrate or nitrite the use of an alkali or alkaline earth metal nitrate or nitrite, or an alkali or alkaline earth carbonate or bicarbonate.

The nitrates or nitrites that may be used include sodium, potassium, calcium, magnesium and mixtures thereof. It is preferred to utilise potassium as the nitrate or the nitrite, preferably as the nitrate. The most preferable smouldering agent is potassium nitrate.

Preferably the smouldering agent comprises between 0.1 and 30% by weight of the insecticide product, more preferably between 0.2 and 20% and most preferably between 0.3 and 10% by weight. The skilled person will be able to fine tune this value based on the burning time desired.

Like the insecticide component above. The smouldering agent may be applied to the surface of the finished rope or applied to the materials used to form the rope.

The product of the present invention may comprise further ingredients such as dyes,pigments, perfumes, preservatives, binding agents, etc.

Optional ingredients may be present in the quantity needed for effective performance. This may be between 0 and 15 % of the of the weight of the final product.

These may be included for technical as well as aesthetic reasons. Perfumes may render the rope product desirable as both an air treatment product as well as an insecticide product.

Claims

1. An insecticide product comprising a combustible support; an active insecticide, and a smouldering agent; Wherein the combustible support comprises a flexible rope with a width of between 2 and 25 mm.

2. An insecticide product according to claim 1 wherein the rope has a weight of between 01 and 500 grams per metre.

3. An insecticide product according to claim 1 or claim 2 wherein the rope preferably has a weight of between 01 and 150 grams per metre.

4. An insecticide product according to any of the previous claims wherein the rope has a density of between 0.01 and 5 grams per centimetre cubed.

5. An insecticide product according to any of the previous claims wherein the rope has an essentially circular cross section

6. An insecticide product according to any of the previous claims wherein the product comprises two or more active insecticides.

7. An insecticide product according to any of the previous claims wherein the active insecticide comprises a pyrethroid.

8. An insecticide product according to any of the previous claims wherein the active insecticide comprises between 0.1 and 20 % by weight of the insecticide product.

9. An insecticide product according to any of the previous claims wherein the active insecticide preferably comprises between 0.5 and 5 % by weight of the insecticide product.

10. An insecticide product according to any of the previous claims wherein the smouldering agent comprises potassium nitrate.

11 .An insecticide product according to any of the previous claims wherein the potassium nitrate comprises between 0.1 and 10% by weight of the insecticide product.

12. An insecticide product according to any of the previous claims wherein the rope comprises textile fibres.

13. An insecticide product according to claim 12 wherein the rope comprises woven strands of textile fibres.

14. An insecticide product according to any one of claims 1-11 wherein the rope comprises at least one rolled paper strand.

15. An insecticide product according to claim 14 wherein the paper has a basis weight of between 20 and 250 gsm.