Humidity sensitive composition
AssigneePuro-Systems PTY LTD
InventorsDavid John Tomlinson, Wayne John Linklater
Life of this patent
Estimating the term…
Abstract
A humidity responsive control device consists of a package having at least one face that is a permeable to liquid and gases and water vapour and is formed by mixing together a) 5 to 50% by weight of a hygroscopic polyacrylate and/or PVA polymer, b) 10 to 60% of porous silica minerals such as vermiculite and perhte, c) 5 to 50% of an absorbent such as zeolite or activated carbon for small molecules such as ammonia and d) 5 to 60% by weight of an aqueous emulsion of a mixture of an active ingredient of one or more of a bacteriocidal, fungicidal or odour masking compounds. The device is effective at eliminating and masking odours under varying humidity conditions.
Claims9
A package having at last one porous surface, said package incorporating a particulate mixture formed by mixing together
- a) 5 to 50% by weight of a water and/or water vapour absorbing agent
- b) 10 to 60% of a water vapour absorbing and releasing agent
- c) 5 to 50% of an absorbent for small molecules and/or
- d) 5 to 60% by weight of an emulsion or solution of a mixture of odour masking compounds impregnated in the particulate components and/or
- e) up to 10% by weight of a water vapour activated active ingredient.
A humidity sensitive device having at last one porous surface, said device incorporating a particulate absorbent formed by mixing together
- a) 5 to 50% by weight of a hygroscopic polymer able to absorb multiples of its dry mass in water
- b) 10 to 60% of silicon dioxide, perlite or vermiculite
- c) 15 to 50% of a zeolite or activated carbon and optionally
- d) 5 to 60% by weight of an emulsion or solution containing at least 0.01% by weight of at least one active compound selected from bacteriocides, fungicides or odour masking compounds.
A composition of matter consisting of
- a) 5 to 50% by weight of a water and/or water vapour absorbing agent capable of absorbing multiples of its own weight in water
- b) 10 to 60% of a water vapour absorbing and releasing agent
- c) 5 to 50% of an absorbent for small molecules
- d) and optionally up to 10% of an active ingredient
A composition of matter consisting of
- a) 5 to 50% by weight of a polyacrylate/polyalcohol co-polymer
- b) 10 to 60% of silicon dioxide, perlite or vermiculite
- c) 15 to 50% of a zeolite or activated carbon and optionally
- d) up to 10% of an active ingredient.
Dependencies are inferred from the claim text.