PROCESS FOR PRODUCING GOLF BALL - BRIDGESTONE SPORTS CO LTD

Title:

PROCESS FOR PRODUCING GOLF BALL

Document Type and Number:

WIPO Patent Application WO/1998/028048

Kind Code:

A1

Abstract:

A thermoplastic resin having groups reactive with isocyanate groups or a thermoplastic resin containing a compound containing two or more groups reactive with isocyanate groups is used to mold a cover of a golf ball. A polyisocyanate compound is infiltrated from the surface into a surface layer of the cover to react the groups reactive with isocyanate groups with the polyisocyanate compound to thereby form a modified layer in the cover surface layer. Thus, a surface layer of the cover comprising a thermoplastic resin is modified to obtain a cover having excellent properties. In this case, a nonyellowing polyurethane resin and 4,4-diphenylmethane diisocyanate (MDI) can be especially preferably used as the thermoplastic resin having groups reactive with isocyanate groups and as the polyisocyanate compound, respectively.

Inventors:

INOUE MICHIO (JP)
IHARA KEISUKE (JP)
SHIMOSAKA HIROTAKA (JP)
MASUTANI YUTAKA (JP)
KASASHIMA ATSUKI (JP)

Application Number:

PCT/JP1997/004801

Publication Date:

July 02, 1998

Filing Date:

December 24, 1997

Export Citation:

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Assignee:

BRIDGESTONE SPORTS CO LTD (JP)
INOUE MICHIO (JP)
IHARA KEISUKE (JP)
SHIMOSAKA HIROTAKA (JP)
MASUTANI YUTAKA (JP)
KASASHIMA ATSUKI (JP)

International Classes:

A63B37/00; A63B37/12; B29C37/00; C08G18/76; C08J7/12; C08L75/04; A63B45/00; (IPC1-7): A63B45/00

Foreign References:

JPH04241881A	1992-08-28
JPH07145222A	1995-06-06
JPH0847553A	1996-02-20

Attorney, Agent or Firm:

Hatanaka, Yoshimi (37 Kanda-Higashimatsushita-ch, Chiyoda-ku Tokyo 101, JP)

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