Title:
ゴルフボール製造方法および製造されたゴルフボール
Document Type and Number:
Japanese Patent JP7337871
Kind Code:
B2
Abstract:
Method of making golf ball comprising providing subassembly and forming at least one layer thereabout comprised of a thermoset polyurethane created using prepolymer prepared by: reacting stoichiometric excess of first isocyanate with at least one long chain polyol and/or polyamine soft segment to create first isocyanate-terminated first prepolymer with (% NCO)FIRST PREPOLYMER; and adding stoichiometric excess of additional isocyanate to the first isocyanate-terminated first prepolymer to produce modified-first prepolymer with (% NCO)MODIFIED-FIRST PREPOLYMER; wherein (% NCO)MODIFIED-FIRST PREPOLYMER>(% NCO)FIRST PREPOLYMER. Reacting a stoichiometric excess of isocyanate in multiple steps and staggering addition of total amount of free, reactive, and unreacted isocyanate functional groups into the isocyanate-functional final prepolymer produces an improved final prepolymer as well as a resulting thermoset polyurethane with better physical properties compared with conventional thermoset polyurethanes based on conventional prepolymers wherein the total % NCO is added in a single step or not at all until well into the prepolymer formation process.
Inventors:
Michael Michael Witch
Brian Como
Sean Rich
Brian Como
Sean Rich
Application Number:
JP2021056501A
Publication Date:
September 04, 2023
Filing Date:
March 30, 2021
Export Citation:
Assignee:
ACUSHNET COMPANY
International Classes:
A63B45/00; C08G18/10; C08G18/48; C08G18/72; C08G18/75
Domestic Patent References:
| JP2019058647A | ||||
| JP2003327652A | ||||
| JP2009226115A | ||||
| JP2018526523A |
Foreign References:
| US20140308444 |
Attorney, Agent or Firm:
Toshio Sawada
Masaaki Miyata
Eiji Yamada
Masaaki Miyata
Eiji Yamada
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