Curable ketiminoxy/organopolysiloxane compositions devoid of organometallic curing catalysts

• US 5,114,764 A
• Filed: 09/16/1991
• Issued: 05/19/1992
• Est. Priority Date: 02/27/1990
• Status: Expired due to Fees

• Current Assignee: Rhone-Poulenc Chimie
• Original Assignee: Rhone-Poulenc Chimie
• Inventors: Perrin, Patrice
• Primary Examiner(s): Marquis, Melvyn I.
• Assistant Examiner(s): DEAN, KAREN A
• Application Number:
  US07/760,128
• Time in Patent Office: 246 Days
• Field of Search: 428/35.5, 428/447, 426/106, 523/111, 128/156
• US Class Current: 428/35.5
• CPC Class Codes: C08K 2003/2241 Titanium dioxide
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 5/32 Compounds containing nitrogen bound to oxygen
• CPC Class Codes: C08K 5/544 containing nitrogen
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: Y10T 428/1345 Single layer [continuous layer]
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

Novel organopolysiloxane compositions that are storage-stable in the absence of moisture, but curable into elastomeric state in the presence of moisture, nonetheless devoid of any organometallic curing catalyst, include (A) an α,ω-dihydroxydiorganopolysiloxane oil, (B) a ketiminoxysilane crosslinking agent, (C) inorganic filler material, (D) an organofunctional silane and (E) a substituted hydroxylamine; the crosslinked elastomers produced from these organopolysiloxane compositions are well adopted for such applications as foodstuff packaging, medical bandaging and antifouling/anti-soiled coatings.

Claims

1. A cured elastomeric organoopolysiloxane composition devoid of any organo metallic curing catalyst, which comprises (A) an α

,ω

-dihydroxydiorgano polysiloxane polymer, (B) a ketiminoxysilane crosslinking agent, (C) inorganic filler material;

(D) an organofunctional silane other than the ketiminoxysilane claimed as component (B) and (E) a substituted hydroxylamine.

2. A shaped article comprising the organopolysiloxane elastomer as defined by claim 1.

3. A foodstuff packaged within the shaped organopolysiloxane elastomer as defined by claim 2.

4. A substrate, adopted for contact with an aqueous medium, provided with a protective coating of the shaped organopolysiloxane elastomer as defined by claim 2.

5. A medical bandage comprising the shaped organopolysiloxane elastomer as defined by claim 2.