	US 11,834,548 B2
	Method of making golf ball incorporating improved polyurethane materials and resulting golf ball
Michael Michalewich, Norton, MA (US)
Assigned to Acushnet Company, Fairhaven, MA (US)
Filed by Acushnet Company, Fairhaven, MA (US)
Filed on Mar. 1, 2021, as Appl. No. 17/188,270.
Claims priority of provisional application 63/000,662, filed on Mar. 27, 2020.
Prior Publication US 2021/0301067 A1, Sep. 30, 2021
Int. Cl. C08G 18/75 (2006.01); C08G 18/38 (2006.01); C08G 18/32 (2006.01); C08G 18/48 (2006.01); C08G 18/12 (2006.01); A63B 37/00 (2006.01); A63B 102/32 (2015.01); A63B 45/00 (2006.01)

CPC C08G 18/757 (2013.01) [C08G 18/12 (2013.01); C08G 18/324 (2013.01); C08G 18/3206 (2013.01); C08G 18/3819 (2013.01); C08G 18/3865 (2013.01); C08G 18/4854 (2013.01); A63B 37/0039 (2013.01); A63B 37/0059 (2013.01); A63B 45/00 (2013.01); A63B 2102/32 (2015.10)]

19 Claims

1. A method of making a golf ball comprising the steps of:

providing a subassembly;

forming about the subassembly at least one layer comprised of a thermoset polyurethane which is prepared by mixing the following ingredients:

(i) at least one long chain soft segment polyol and/or polyamine;

(ii) at least one short chain-extending species;

(iii) at least one isocyanate; and

(iv) at least one additional chain-extending species;

wherein ingredients (i) and (ii) are combined to form a first sub-mixture; and then the first sub-mixture and ingredient (iii) are combined to form a prepolymer second sub-mixture; and then the prepolymer second sub-mixture is combined with ingredient (iv) to form the thermoset polyurethane.