Insect repellent formulation for surface protection

Abstract

The composition of a set of formulations based on synthetic active ingredients and natural boosting additives, which provide repellent action against flying insects such as mosquitoes, flies and black-winged stilts, as well as crawling insects such as cockroaches and ants.

Claims

1. A formulation for use as a repellent additive applied to a surface for repelling crawling and flying insects, comprising: 45% to 60% by weight of the formulation selected from the group consisting of permethrin, cypermethrin, and a mixture of permethrin and cypermethrin; 8% to 12% by weight of propylene glycol and/or dipropylene glycol; 10% to 15% by weight of hydrogenated castor oil; 3% to 7% by weight of propoxylate and/or ethoxylate alcohol; and 12% to 20% by weight of calcium dodecylbenzenesulfonate and/or polyethylene-polypropylene monobutyl glycol ether.

2. The formulation according to claim 1 further comprising a natural additive selected from the group consisting of lemongrass oil, neem oil, andiroba oil, and a mixture of two or more thereof.

3. The formulation according to claim 2, wherein the natural additive(s) comprise from 10% to 12% by weight of the formulation.

4. A coated composition comprising: the formulation according to claim 1; and a composition; wherein the formulation is applied to a surface of the composition; and wherein the composition is selected from the group consisting of water-based and solvent-based compositions.

5. The coated composition according to claim 4, wherein the water-based composition is selected from the group consisting of acrylic, latex, styrene-acrylic, epoxy and alkyd.

6. The coated composition according to claim 4, wherein the solvent-based composition is selected from the group consisting of acrylic, epoxy and alkyd.

7. A coated product comprising: the formulation according to claim 1; and a product; wherein the formulation is applied to a surface of the product; and wherein the product is selected from the group consisting of a wood laminate product that includes resin in its composition and surface coating paper product.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a chart with repellency results and performance at time 0 against Periplaneta Americana (house roach) using composition 1.

(2) FIG. 2 shows a chart with repellency results and performance at time 0 against Periplaneta Americana (house roach) using composition 2.

(3) FIG. 3 shows a chart with repellency results and performance at time 0 against Aedes aegypti using composition 1.

(4) FIG. 4 shows a chart with repellency results and performance at time 0 against Aedes aegypti using composition 2.

DETAILED DESCRIPTION OF THE INVENTION

(5) Some natural active ingredients, which also include insect repellent properties, were also evaluated. Some examples include the Neem oil, Eucalyptus oil, lemongrass (essential oils), among others.

(6) Afterwards, drawing on some of the work already performed, formulations including said active ingredients and formulations including synthetic active ingredients such as pyrethrin and pyrethroid byproducts were prepared, which will be described in detail in the following examples, and water-based coating compatibility and stability evaluation work was launched (acrylic paint and PVA latex).

(7) After the stability and compatibility test phase, paint samples were prepared and submitted to lab testing for proof of efficiency of the additive.

(8) According to ANVISA [Brazilian Health Surveillance Agency], repellents are “products with repellent action against insects, for application to immovable surfaces and volatilization in environments with slow and continuous release of the active ingredient(s) by electric heating or other energy form, or even spontaneously”, and the concept of insect repellency is different from insecticide action, as it does not kill the insect, but rather discourages the insect from landing or pushes it away from a certain surface.

(9) There are various types of repellents available in the market directed at skin application or room protection, in which the release of the active ingredient is done by heating (repellent tablets or solutions that are released by electric devices) or even by burning as candles or coil repellents.

(10) The development described herein features the compatibility of repellent active ingredients through formulations including additives, solvents, stabilizers and surfactants as innovation, enabling inclusion in products such as: water-based (acrylic, latex, styrene-acrylic, epoxy, alkyd, among others) and solvent-based (acrylic, epoxy, alkyd, among others) coating compositions; wood laminate products that include resin in their compositions, which may be used in producing furniture, tools, base trims, ceiling trims, etc.; surface coating paper, such as wallpapers; in order to provide rooms less susceptible to insect dwelling and development, contributing to the quality of life of users of said rooms or environments.

(11) The composition comprises the following ingredients: permethrin or cypermethrin, glycol, hydrogenated castor oil and/or essential lemongrass oil, ethoxylate/propoxylate alcohol, anionic surfactants, namely calcium dodecylbenzenesulfonate and/or polyethylene-polypropylene monobutyl glycol ether. More particularly, the composition comprises the proportions listed in the following examples:

EXAMPLES AND RESULTS

Example 1—Additive Formulation with Repellent Action, Synthetic Base

(12) Repellent additive composition, named composition 1, including:

(13) TABLE-US-00001 Compound % weight Addition order Permethrin/Cypermethrin 45.0-60.0 5 Glycol (propylene glycol/  8.0-12.0 1 dipropylene glycol) Hydrogenated Castor Oil 40 EO 10.0-15.0 4 Ethoxylate/Propoxylate Alcohol 4.0-7.0 3 Calcium dodecylbenzenesulfonate 15.0-20.0 2 and/Polyethylene-polypropylene monobutyl glycol ether

(14) Stability and compatibility test results for water-based coatings (vinyl-acrylic resin) with Composition 1 at 1.00 and 1.50% dosages are as follows.

(15) Methodology: Use of additives on PAINT 1 VINYL and PAINT 2 VINYL samples, with 1.00% and 1.50% dosages of the repellent additive composition 1; Advanced stability testing in oven at 45° C. for 14 days; Daily color and odor monitoring of the samples in humid state; pH measurement at the start and end of the stability period.

(16) Results:

(17) A—Sample: Water-Based Vinyl Paint

(18) TABLE-US-00002 (Ref.: RAM 1262/13) Sample: Vinyl 1 Additives: Color Odor Paint as such WHITE (10% pH at 9.38 water) CHARACTERISTIC 1.00% WHITE CHARACTERISTIC Composition 1 Day 2 WHITE CHARACTERISTIC Day 3 WHITE CHARACTERISTIC Day 4 WHITE CHARACTERISTIC Day 5 WHITE CHARACTERISTIC Day 6 WHITE CHARACTERISTIC Day 7 WHITE CHARACTERISTIC Day 8 WHITE CHARACTERISTIC Day 9 WHITE CHARACTERISTIC Day 10 WHITE CHARACTERISTIC Day 11 WHITE CHARACTERISTIC Day 12 WHITE CHARACTERISTIC Day 13 WHITE CHARACTERISTIC Day 14 WHITE CHARACTERISTIC pH (10% solution in water) Initial: 9.34 Final: 9.31 1.50% WHITE CHARACTERISTIC Composition 1 Day 2 WHITE CHARACTERISTIC Day 3 WHITE CHARACTERISTIC Day 4 WHITE CHARACTERISTIC Day 5 WHITE CHARACTERISTIC Day 6 WHITE CHARACTERISTIC Day 7 WHITE CHARACTERISTIC Day 8 WHITE CHARACTERISTIC Day 9 WHITE CHARACTERISTIC Day 10 WHITE CHARACTERISTIC Day 11 WHITE CHARACTERISTIC Day 12 WHITE CHARACTERISTIC Day 13 WHITE CHARACTERISTIC Day 14 WHITE CHARACTERISTIC pH (10% solution in water) Initial: 9.34 Final: 9.34

(19) Samples were kept in oven after 14 days of stability. Also, a film extension test was carried out, with no changes observed regarding aspect of the dry film.

Example 2—Additive Formulation with Synthetic-Based Repellent Action Additive Boosted with Natural Additives

(20) The incorporation of natural additives, aside from bolstering the additive action, increasing its action spectrum, provides a more sustainable product from the viewpoint of availability of plant-derived raw materials such lemongrass, Neem oil, among others.

(21) Below is the description of a repellent additive composition, called composition 2, which comprises:

(22) TABLE-US-00003 Compound % weight Addition order Permethrin/Cypermethrin 40.0-50.0 5 Glycol (propylene glycol/  8.0-12.0 1 dipropylene glycol) Essential Lemongrass oil 10.0-12.0 6 Hydrogenated Castor Oil 40 EO 10.0-15.0 4 Ethoxylate/Propoxylate Alcohol 3.0-6.0 3 Calcium dodecylbenzenesulfonate 12.0-17.0 2 and/Polyethylene-polypropylene monobutyl glycol ether

(23) Stability and compatibility test results for water-based coatings (vinyl-acrylic resin) with Composition 2 at 1.00 and 1.50% dosages are as follows:

(24) TABLE-US-00004 Additives: Color Odor 1.00% WHITE REPELLENT ADDITIVE Composition 2 SLIGHT ODOR Day 2 WHITE REPELLENT ADDITIVE ODOR Day 3 WHITE REPELLENT ADDITIVE ODOR Day 4 WHITE REPELLENT ADDITIVE ODOR Day 5 WHITE REPELLENT ADDITIVE ODOR Day 6 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 7 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 8 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 9 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 10 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 11 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 12 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 13 WHITE REPELLENT ADDITIVE SLIGHT ODOR Day 14 WHITE REPELLENT ADDITIVE SLIGHT ODOR pH (10% solution in water) Initial: 8.78 Final: 9.02 1.50% WHITE REPELLENT ADDITIVE Composition 2 SLIGHT ODOR Day 2 WHITE REPELLENT ADDITIVE ODOR Day 3 WHITE REPELLENT ADDITIVE ODOR Day 4 WHITE REPELLENT ADDITIVE ODOR Day 5 WHITE REPELLENT ADDITIVE ODOR Day 6 WHITE REPELLENT ADDITIVE ODOR Day 7 WHITE REPELLENT ADDITIVE ODOR Day 8 WHITE REPELLENT ADDITIVE ODOR Day 9 WHITE REPELLENT ADDITIVE ODOR Day 10 WHITE REPELLENT ADDITIVE ODOR Day 11 WHITE REPELLENT ADDITIVE ODOR Day 12 WHITE REPELLENT ADDITIVE ODOR Day 13 WHITE REPELLENT ADDITIVE ODOR Day 14 WHITE REPELLENT ADDITIVE ODOR pH (10% solution in water) Initial: 8.73 Final: 8.91

(25) Samples were kept in oven after 14 days of stability. Also, a film extension test was carried out, with no changes observed regarding aspect of the dry film.

(26) After the film dried, odor was no longer noticeable, allowing application of the coating without restrictions.