Method for producing granules with reduced dust potential comprising an antifoam agent
A granule with an allergenic component has reduced dust by including antifoam added during the production of the granule. The antifoam may be dispersed throughout the granule or added to one of the components of the granule. The granule with antifoam produces at least 30% less dust than a comparable granule produced according to a process in which no antifoam is added.
1. A method for the production of a granule such that said granule produces reduced dust comprising:
(a) providing a core comprising a protein and an antifoam agent comprising a copolymer of ethylene oxide and propylene oxide; and
(b) applying an outer coating comprising a film-forming polymer around the core of step (a) to produce a granule, wherein said outer coating does not comprise said antifoam agent,
wherein said antifoam agent comprises about 0.25 to about 10% w/w of the granule, and
wherein said granule produces at least 10% less dust as measured by a Heubach dust test than a granule produced using identical components and according to an identical process except that no antifoam agent is present in said core.
2. The method according to claim 1 , wherein said protein comprises an enzyme.
3. A granule produced according to claim 1 or 2 .
4. A method according to claim 1 , wherein said film-forming polymer is a polyvinyl alcohol.
5. A method according to claim 1 , wherein said film-forming polymer is a cellulose derivative.
6. A granule comprising: a seed particle; an admixture comprising an allergenic agent and about 0.25% to about 10% w/w of the granule of an antifoaming agent comprising a copolymer of ethylene oxide and propylene oxide surrounding the seed particle; and an outer coating comprising a film-forming polymer, wherein said outer coating does not comprise said antifoam agent, and wherein the granule has at least 10% less dust as measured by a Heubach test than a granule without the antifoaming agent prepared by an identical process.
7. The granule of claim 6 further comprising a barrier layer between the admixture of allergenic agent and antifoaming agent surrounding the seed particle and the outer coating.
8. The granule of claim 6 wherein the admixture of the allergenic agent and antifoaming agent further comprises one or more barrier materials.
9. The granule of claim 6 wherein the allergenic component comprises an enzyme or protein.
10. A granule according to claim 6 , wherein said film-forming polymer is a polyvinyl alcohol.
11. A granule according to claim 6 , wherein said film-forming polymer is a cellulose derivative.