An insect repellent composition for repelling insects from mammals and vegetation. This composition comprises: dihydroxyacetone (DHA) and a carrier suitable for insect repellent compositions. DHA is the active ingredient and the composition is efficacious in repelling insects.

A topical mosquito control product includes active and inert ingredients. The active ingredients include geraniol. The inert ingredients include natural materials and may include edible oil such as sunflower oil, Oleic Acid, monolaurin, octanoic acid, decanoic acid, lauric acid, lecithin and water wherein the topical mosquito repellent composition has no essential oil scent.

The present invention relates to a method for preparing p-menthane-3,8-diol, characterised in that it comprises the following steps:

a. preparation of an aqueous solution comprising between 0.05% and 5% by mass, preferably between 0.05% and 2% by mass, preferentially between 0.05% and 1% by mass, even more preferentially between 0.05% and 0.5% by mass of an ammonium salt, the said ammonium salt being characterised in that it is selected from the group formed by an amino acid ammonium salt, and in particular an amino acid hydrochloride, a vitamin B ammonium salt, and in particular a vitamin B hydrochloride, an ammonium salt of an amino acid ester, and an ammonium salt of a vitamin B ester, or is defined by the following formula (I):

##STR00001##

wherein R.sub.1 represents a benzyl, optionally substituted, or R.sub.1 represents an alkyl, either linear or branched, optionally cyclical, saturated or unsaturated, optionally substituted, comprising from 1 to 10 carbon atoms, preferably from 1 to 6 carbon atoms, preferentially from 2 to 4 carbon atoms, and R.sub.2, R.sub.3 and R.sub.4 represent a hydrogen or a methyl group, and X represents a chlorine atom, bromine atom or an OR′ group, R′ being an alkyl group comprising from 1 to 10 carbon atoms,

b. adding of citronellal to the aqueous solution obtained in the step a), and obtaining a mixture;

c. stirring and heating of the mixture obtained in the step b);

d. decanting of the reaction medium obtained at the end of step c) and obtaining at least two phases; and

e. separation of the said at least two phases obtained in the step d), and obtaining at least one aqueous phase and at least one organic phase, the said organic phase comprising at least p-menthane-3,8-diol.

The present invention relates to a method for preparing p-menthane-3,8-diol, characterised in that it comprises the following steps:

a. preparation of an aqueous solution comprising between 0.05% and 5% by mass, preferably between 0.05% and 2% by mass, preferentially between 0.05% and 1% by mass, even more preferentially between 0.05% and 0.5% by mass of an ammonium salt, the said ammonium salt being characterised in that it is selected from the group formed by an amino acid ammonium salt, and in particular an amino acid hydrochloride, a vitamin B ammonium salt, and in particular a vitamin B hydrochloride, an ammonium salt of an amino acid ester, and an ammonium salt of a vitamin B ester, or is defined by the following formula (I):

##STR00001##

wherein R.sub.1 represents a benzyl, optionally substituted, or R.sub.1 represents an alkyl, either linear or branched, optionally cyclical, saturated or unsaturated, optionally substituted, comprising from 1 to 10 carbon atoms, preferably from 1 to 6 carbon atoms, preferentially from 2 to 4 carbon atoms, and R.sub.2, R.sub.3 and R.sub.4 represent a hydrogen or a methyl group, and X represents a chlorine atom, bromine atom or an OR′ group, R′ being an alkyl group comprising from 1 to 10 carbon atoms,

b. adding of citronellal to the aqueous solution obtained in the step a), and obtaining a mixture;

c. stirring and heating of the mixture obtained in the step b);

d. decanting of the reaction medium obtained at the end of step c) and obtaining at least two phases; and

e. separation of the said at least two phases obtained in the step d), and obtaining at least one aqueous phase and at least one organic phase, the said organic phase comprising at least p-menthane-3,8-diol.

The present invention belongs to mosquito repellent technical field, and specifically a mosquito repellent composition, preparation method and application thereof. The mosquito repellent composition comprises following ingredients and mass fractions thereof: composite plant oil 7-10 parts, gromwell root extracts 3-5 parts, vitex rotundifolia extracts 1-3 parts, sustained release agents 1-2 parts, emulsifying agents 2-4 parts, stabilizing agents 0.1-0.3 part, and water 165-182 parts. The mosquito repellent composition provided in the present invention doesn't contain chemical ingredients such as DEET and methothrin etc., and works in combination with natural plant essence oil, which is highly safe, free from irritation, allergic reactions and other side effects, and can be used to repel mosquitoes safely, gently and is suitable for long term use.

Disclosed herein are spatial insect repellent compositions comprising pyrethrins and about 5% to about 20% by weight p-menthane-3,8-diol.

The present invention belongs to mosquito repellent technical field, and specifically a mosquito repellent composition, preparation method and application thereof. The mosquito repellent composition comprises following ingredients and mass fractions thereof: composite plant oil 7-10 parts, gromwell root extracts 3-5 parts, Vitex rotundifolia extracts 1-3 parts, sustained release agents 1-2 parts, emulsifying agents 2-4 parts, stabilizing agents 0.1-0.3 part, and water 165-182 parts. The mosquito repellent composition provided in the present invention doesn't contain chemical ingredients such as DEET and methothrin etc., and works in combination with natural plant essence oil, which is highly safe, free from irritation, allergic reactions and other side effects, and can be used to repel mosquitoes safely, gently and is suitable for long term use.

The present invention belongs to mosquito repellent technical field, and specifically a mosquito repellent composition, preparation method and application thereof. The mosquito repellent composition comprises following ingredients and mass fractions thereof: composite plant oil 7-10 parts, gromwell root extracts 3-5 parts, Vitex rotundifolia extracts 1-3 parts, sustained release agents 1-2 parts, emulsifying agents 2-4 parts, stabilizing agents 0.1-0.3 part, and water 165-182 parts. The mosquito repellent composition provided in the present invention doesn't contain chemical ingredients such as DEET and methothrin etc., and works in combination with natural plant essence oil, which is highly safe, free from irritation, allergic reactions and other side effects, and can be used to repel mosquitoes safely, gently and is suitable for long term use.

Microcapsule compositions as disclosed comprising a microcapsule dispersed in an aqueous phase. The microcapsule has a microcapsule core and a microcapsule wall encapsulating the microcapsule core. The microcapsule core contains an active material. The microcapsule wall is formed of a polymeric network comprising a first moiety derived from a protein, and a second moiety derived from a multi-functional electrophile. Also disclosed are preparation methods and consumer products containing the microcapsule compositions.

Methods for repelling Drosophila species (e.g., D. suzukii, D. melanogaster) involving treating an object or area with a composition containing a Drosophila species (e.g., D. suzukii, D. melanogaster) repelling effective amount of 2-pentylfuran and optionally a carrier.