Tack-free silicone gel moldings

• US 4,911,974 A
• Filed: 07/05/1988
• Issued: 03/27/1990
• Est. Priority Date: 07/07/1987
• Status: Expired due to Fees

• Current Assignee: Ltd. Toray Silicone Company
• Original Assignee: Ltd. Toray Silicone Company
• Inventors: Shimizu, Koji, Hamada, Mitsuo
• Primary Examiner(s): Epstein, Henry F.
• Assistant Examiner(s): Turner, Archene A.
• Application Number:
  US07/215,133
• Time in Patent Office: 630 Days
• Field of Search: 428/143, 428/331, 428/327, 428/405, 428/407, 428/447, 428/144, 428/145, 428/206, 428/220, 2/159, 2/168, 623/7
• US Class Current: 428/143
• CPC Class Codes: C08J 2383/04 Polysiloxanes
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C08J 7/06 with compositions not containing macromolecular substances
• CPC Class Codes: Y10T 428/24372 Particulate matter
• CPC Class Codes: Y10T 428/2438 Coated
• CPC Class Codes: Y10T 428/24388 Silicon containing coating
• CPC Class Codes: Y10T 428/24893 including particulate material
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/259 Silicic material
• CPC Class Codes: Y10T 428/2995 Silane, siloxane or silicone coating
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

Tack-free silicone gel moldings and methods of making such moldings are prepared by coating tacky silicone gel moldings with a silicone rubber particles, having an average diameter less than about 1 mm.

Claims

1. A tack-free silicone gel molding comprising a molding formed principally of a crosslinked organopolysiloxane having a partial three-dimensional network structure and exhibiting limited fluidity and deformation upon application of stress which is coated with a particulate having an average diameter less than about 1 mm, wherein said particulate comprises cured silicone rubber particles.

2. A tack-free silicone gel molding as claimed in claim 1 wherein said molding is spherical.