WO2017040432A4

WO2017040432A4 - Cooling agent for cold packs and food and beverage containers

Info

Publication number: WO2017040432A4
Application number: PCT/US2016/049331
Authority: WO
Inventors: David Leavitt; John Bergida
Original assignee: Frosty Cold, Llc
Priority date: 2015-08-28
Filing date: 2016-08-29
Publication date: 2017-05-04
Also published as: WO2017040432A1

Abstract

Safe, stable, non-toxic and recyclable cooling agent compositions comprising solid particulate compounds undergo an endothermic process when mixed with water such that the resulting mixture is useful for cooling surfaces, liquids and solids. The mixtures include ammonium nitrate in an amount of at least 45 wt% of the mixture. Total nitrogen -containing salts exclusive of phosphates are present in an amount less than 68% by weight of the composition. A phosphate salt is also present in an amount as needed to stabilize the composition against detonation. A balance of additional salts is formulated to provide the mixture with a cooling capacity of at least 240 kJ/kg of the mixture.

Claims

AMENDED CLAIMS received by the International Bureau on 22 February 2017 (22.02.2017) CLAIMS

1. A cooling agent composition comprising:

a nitrogen-containing salt material present in an amount ranging from 45% to 68% by weight of the composition exclusive of water or other liquid.

the nitrogen-containing salt material including at least in part ammonium nitrate: the nitrogen-containing salt material being exclusive of phosphate salts , a phosphate salt including an amount of phosphate sufficient to stabilize the ammonium nitrate from detonation, the phosphate salt selected from a group consisting of ammonium phosphate, diammonium phosphate, ammonium polyphosphate, ammonium pyrophosphate and ammoni um tnetaphosphate, such that the compound or mixture of compounds in this group is at least 1% by weight of the final composition; and

a balance of salts formulated to provide the composition with a cooling capacity of at least 240 kJ/kg of the mixture.

2. The salt mixture of claim 1 , wherein the phosphate salt is monobasic ammonium phosphate.

3. The salt mixture of claim 2, wherein the ammonium nitrate is present in an amount greater than 50 wt%.

4. The salt mixture of claim 1 , wherein, the ammonium nitrate is present in an amount greater than. 60 wt%,

5. The salt mixture of claim 1 , wherein, the nitrogen-containing salt materia! includes up to 15 wt% potassi um nitrate.

6. The salt mixture of claim 1 , wherein the mixture includes a composition selected from the group consisting of sodium perchlorite, sodium perchlorate, sodium bromate dehydrate, sodium acetate trihydrate, sodium thiosulfate, sodium thiosulfate pentahydrate, trisodium phosphate, and sodium bicarbonate.

7. The salt mixture of claim 1 , wherein the balance of salts includes a chloride salt and provides the mixture with a cooling capacity of at least 245 kJ/kg,

8. The salt mixture of claim 1. wherein the balance of salts provides the mixture with a cooling capacity of at least 250 kj/kg.

9. The salt mixture of claim 1 , wherein the balance of salts provides the mixture with a cooling capacity of at least 255 kj/kg.

STATEMENT UNDER ARTIC LE 19(1 )

Independent Claim 1

Independent claim 1 has been amended to include compounds not previously included in any of the claims but referenced in paragraph [00015] of the original application. Since these compositions are not found in any of the prior art references. Amended claim 1 satisfies the inventive step requirement under PCT Article 33(3), Since claims 2 - 9 depend from claim I and claim 1 is now amended to include these additional compounds these claims now satisiy the requirements of inventive step and claims 1 -9 should likewise now be in allowable form.

Dependent Claim 3

Claim 6, which depends from claim 1 has also been amended to include additional compounds referenced in paragraph [00015] but not previously incorporated into the claim set.