US 11,891,484 B2
Putty and putty base compounds and methods of making thereof
Michael L. Spera, Mohnton, PA (US)
Assigned to Crayola LLC, Easton, PA (US)
Filed by Crayola LLC, Easton, PA (US)
Filed on May 26, 2020, as Appl. No. 16/883,422.
Claims priority of provisional application 62/901,331, filed on Sep. 17, 2019.
Prior Publication US 2021/0079168 A1, Mar. 18, 2021
Int. Cl. C08G 77/06 (2006.01); C08K 3/013 (2018.01); C08L 83/04 (2006.01); C08G 77/58 (2006.01); C08K 5/56 (2006.01); C08G 77/16 (2006.01)
CPC C08G 77/06 (2013.01) [C08G 77/58 (2013.01); C08K 3/013 (2018.01); C08L 83/04 (2013.01); C08G 77/16 (2013.01); C08K 5/56 (2013.01)] 17 Claims
 
1. A method of making a putty base, comprising:
a) combining at least one non-crosslinked polydiorganosiloxane comprising at least two reactive functional groups and at least one crosslinker capable of reacting with the at least two reactive functional groups to afford a reaction mixture; and
b) allowing the at least one non-crosslinked polydiorganosiloxane and the at least one crosslinker to react to form the putty base;
wherein the putty base is dilatant, exhibits cold flow, and comprises less than 0.9 ppm weight of organotin compounds and the at least one crosslinker consists essentially of at least one of aluminum alkoxides, chelated aluminum complexes, titanium alkoxides, chelated titanium complexes, zirconium alkoxides, zirconium chelates, hafnium alkoxides, chelated hafnium complexes, and mixtures thereof.