US 11,859,076 B2
Biodegradable playdough and manufacturing processes thereof
Ifat Hammer, Rehovot (IL); Tal Liezer, Zichron Yaakov (IL); Yitzhak Shahar, Tel Aviv (IL); Ana Dotan, Ramat Gan (IL); and Gali Levy, Ramat Gan (IL)
Assigned to SHACHAR GROUP LTD, Timmorim (IL)
Filed by Shachar Group Ltd, Timmorim (IL)
Filed on Aug. 31, 2022, as Appl. No. 17/899,671.
Claims priority of application No. 288691 (IL), filed on Dec. 5, 2021.
Prior Publication US 2023/0174749 A1, Jun. 8, 2023
Int. Cl. C08L 3/02 (2006.01); C08L 3/04 (2006.01); A21D 17/00 (2006.01)
CPC C08L 3/02 (2013.01) [A21D 17/00 (2013.01); C08L 3/04 (2013.01)] 28 Claims
 
1. A process of manufacturing a biodegradable playdough comprising at least 75 wt % of biodegradable components based on the total weight of the playdough, the process comprising:
(a) particulating bread waste to an average particle size of at most 200 μm, thereby obtaining particulated bread waste;
(b) mixing the particulated bread waste with at least one rheology modifier, at least one retrogradation prevention agent and water to obtain a mixture, wherein said mixture comprises at least 30 wt % bread waste and maintaining the mixture at a temperature of at least about 40° C. for a predefined period of time; and
(c) cooling the mixture to a room temperature to obtain said biodegradable playdough.
 
19. A biodegradable playdough composition, comprising:
i) at least about 30 wt % bread waste wherein the bread waste is in particulate form, having an average particle size of no more than about 200 μm,
ii) at most about 50 wt % water, and
iii) a combination of functional additive comprising at least one rheology modifier and at least one retrogradation preventing agent, the biodegradable playdough composition comprising at least about 75 wt % of biodegradable components based on the total weight of the composition, the biodegradable playdough composition having a complex viscosity of between about 1×104 and about 1×106 Pa·s (as measured by parallel plates rheometer, at 25° C., at 0.1 Hz).