Council of Scientific and Industrial Research

The Procter Gamble Company

Parshuram Gajanan Shukla

Johan Smets

Philip Frank Souter

Swaminathan Sivaram

Arun Savalaram Jadhav

Jiten Odhavji Dihora

Mohan Gopalkrishna Kulkarni

Susana Fernandez Prieto

Kadhiravan Shanmuganathan

Michelle Meek

Ramanan Venkata Ganapathysundaram

Aruna Narayan Bote

Natarajan Rajagopalan

Nilakshi Vaibhav Sadavarte

The present invention relates to partially bio-based and bio-compatible polyurethane microcapsules. More particularly, the present invention relates to partially bio-based and bio-compatible polyurethane microcapsules for sustained release of an active ingredient. The present invention also relates to a process for the preparation of the partially bio-based and bio-compatible polyurethane microcapsules.

Bio-compatible polyurethane microcapsules and process for the preparation thereof

The present invention disclosed a microcapsule modified with nanomaterial for controlled release of active agent comprising; a core comprising active agent and said polymer shell encompassing said core; characterized in that said polymer shell is made up of polymer nanocomposite and a process for the preparation thereof.

Microcapsules modified with nanomaterial for controlled release of active agent and process for preparation thereof

Disclosed herein is a stable, encapsulated reactive amine composition, having a particle size about 100 microns or less comprising; water soluble amine; polymeric surfactant/stabilizer; polyisocynate; and fumed silica; wherein, the reactive amine is released from the encapsulated amine in aqueous and non-aqueous environment, for use in industries such as painting, cosmetics, paper, lubricants, printing, plastics, petrochemicals etc. Further, the invention provides process for the preparation of stable microcapsule composition, without converting the water soluble amine into its salt or adduct and its characterization thereof.

Microcapsule composition containing water-soluble amine and a process for the preparation thereof

The present invention disclosed a process for the preparation of microcapsules containing epoxy resin which comprises water-insoluble and/or water-soluble components prepared by in-situ polymerization using non-aqueous continuous phase which acts as healing agents for the micro-cracks when embedded in composite structures.

Process for preparation of self healing microcapsules

The present invention relates to benefit agent containing delivery particles, compositions comprising said particles, and processes for making and using the aforementioned particles and compositions. When employed in compositions, for example, cleaning or fabric care compositions, such particles increase the efficiency of benefit agent delivery, there by allowing reduced amounts of benefit agents to be employed. In addition to allowing the amount of benefit agent to be reduced, such particles allow a broad range of benefit agents to be employed.

Benefit agent containing delivery particle

The present invention relates to a process for the preparation of polyurethane microcapsules containing monocrotophos, which comprises of preparing a solution of diol or polyol having a molecular weight in the range of 200-2000, crosslinker, monocrotophos and a catalyst selected from amino or organometallic compounds; dispersing this solution into a dilute solution of stabilizer which consists of a block copolymer having the general formula �A!.sub.n -�B!.sub.m where A and B are chemically and compositionally dissimilar segments where n and m segments are in between 30-115 and 10-60 units respectively, such that the sum of n and m does not exceed 175 units, in an aliphatic hydrocarbon; adding an isocyanate dropwise to this dispersion; agitating the mixture at 1000-1400 revolutions per minute for the first 6-8 hours and then at 500-800 revolutions per minute for an additional period of 14-18 hours at a temperature between 30.degree. to 40.degree. C. to permit the formation of polyurethane microcapsules; heating the dispersion for an additional period of 1-2 hours at a temperature not exceeding 50.degree. C.; filtering the microcapsules; washing the microcapsules with lower aliphatic hydrocarbon and drying the microspheres under vacuum at temperature between 20.degree. to 35.degree. C.

Process for the preparation of polyurethane microcapsules containing

The invention provides a process for the preparation of polyurethane microspheres, which comprises of preparing a solution of diol or polyol having a molecular weight in the range of 200-2000, crosslinker and a catalyst selected from amino or organometallic compounds, dispersing, this solution in dilute solution of stabilizer which consists of a block copolymer having the general formula �A!.sub.n -�B!.sub.m where A and B are chemically and compositionally dissimilar segments and n and m segments are in between 30-115 and 10-60 units respectively, such that the sum of n and m does not exceed 175 units, in an aliphatic hydrocarbon, adding an isocyanate dropwise to this dispersion agitating the mixture at high speed of 100-1200 revolutions per minute, a temperature between 30.degree. to 55.degree. C. to permit the formation of polyurethane microspheres, separating these microspheres by filtration, washing with lower aliphatic hydrocarbon and drying the microspheres under vacuun.

Polyurethane Microspheres

The invention provides a process for the preparation of polyurethane microspheres, which comprises of preparing a solution of diol or polyol having a molecular weight in the range of 200-2000, crosslinker and a catalyst selected from amino or organometallic compounds, dispersing this solution in dilute solution of stabilizer which consists of a block copolymer having the general formula �A!.sub.n-- �B!.sub.m where A and B are chemically and compositionally dissimilar segments and n and m segments are in between 30-115 and 10-60 units respectively, such that the sum of n and m does not exceed 175 units, in an aliphatic hydrocarbon, adding an isocyanate dropwise to this dispersion, agitating the mixture at high speed of 100-1200 revolutions per minute, a temperature between 30.degree. to 55.degree. C. to permit the formation of polyurethane microspheres, separating these microspheres by filtration, washing with lower aliphatic hydrocarbon and drying the microspheres under vacuum.

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Pune, India

Parshuram Gajanan Shukla