Compressible, sulfur-containing silicone rubber

• US 5,998,548 A
• Filed: 08/17/1998
• Issued: 12/07/1999
• Est. Priority Date: 08/18/1997
• Status: Expired due to Fees

• Current Assignee: Wacker-Chemie GmbH (Dr. Alexander Wacker Familiengesellschaft Mit Beschrã¤Nkter Haftung)
• Original Assignee: Wacker-Chemie GmbH (Dr. Alexander Wacker Familiengesellschaft Mit Beschrã¤Nkter Haftung)
• Inventors: Bosch, Erhard, Mittermeier, Manfred, Matejcek, Klaus-M., Rohrmuller, Heinz-Max, Brennenstuhl, Werner, Kovar, Ingomar
• Primary Examiner(s): Michl, Paul R.
• Application Number:
  US09/135,365
• Time in Patent Office: 477 Days
• Field of Search: 523/218, 525/331.9
• US Class Current: 525/331.9
• CPC Class Codes: C08G 77/06 Preparatory processes C08G77/045 takes precedence
• CPC Class Codes: C08G 77/28 sulfur-containing groups
• CPC Class Codes: C08K 5/5425 containing at least one C=C bond
• CPC Class Codes: C08K 7/22 Expanded, porous or hollow particles
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/28 Non-macromolecular organic substances
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09K 2200/0488 Sulfur-containing compounds
• CPC Class Codes: C09K 2200/0494 Silicon-containing compounds
• CPC Class Codes: C09K 3/1018 Macromolecular compounds having one or more carbon-to-silicon linkages

Abstract

Compositions which crosslink to form elastomers and are based on

(A) hollow polymer bodies,

(B) addition-crosslinkable organosilicon compounds, and

(C) organic sulfur compounds.

Claims

1. A composition which crosslinks to form elastomers, comprising:

(A) hollow polymer bodies,

(B) addition-crosslinkable organosilicon compounds comprising an alkenyl-functional organosilicon compound and an Si--H-functional organosilicon compound, and

(C) organic sulfur compounds.

2. A composition which crosslinks to form elastomers as claimed in claim 1, which has a viscosity of from 1000 to 2,000,000 mPa·

s.

3. A composition which crosslinks to form elastomers as claimed in claim 1, wherein the hollow polymer bodies (A) have a density of from 10 to 80 kg/m³ and a particle size of 5-200 μ

m.

4. A composition which crosslinks to form elastomers as claimed in claim 2, wherein the hollow polymer bodies (A) have a density of from 10 to 80 kg/m³ and a particle size of 5-200 μ

m.

5. A composition which crosslinks to form elastomers as claimed in claim 1, wherein the organic sulfur compound has been applied to an inorganic filler.

6. A composition which crosslinks to form elastomers as claimed in claim 2, wherein the organic sulfur compound has been applied to an inorganic filler.

7. A composition which crosslinks to form elastomers as claimed in claim 3, wherein the organic sulfur compound has been applied to an inorganic filler.

8. A composition which crosslinks to form elastomers as claimed in claim 1, wherein the organic sulfur compound comprises one or more of 3-mercaptopropyl-trimethoxysilane, 3-mercaptopropyl-triethoxysilane, a polydimethyl-siloxane-co-mercapto-alkyl compound or octadecane-1-thiol.

9. A composition which crosslinks to form elastomers as claimed in claim 2, wherein the organic sulfur compound comprises one or more of 3-mercaptopropyl-trimethoxysilane, 3-mercaptopropyl-triethoxysilane, a polydimethyl-siloxane-co-mercapto-alkyl compound or octadecane-1-thiol.

10. A composition which crosslinks to form elastomers as claimed in claim 3, wherein the organic sulfur compound comprises one or more of 3-mercaptopropyl-trimethoxysilane, 3-mercaptopropyl-triethoxysilane, a polydimethyl-siloxane-co-mercapto-alkyl compound or octadecane-1-thiol.

11. A process for producing compositions which crosslink to form elastomers as claimed in claim 1, which comprises mixing the components A, B and C.

12. A process for producing compositions which crosslink to form elastomers as claimed in claim 2, which comprises mixing the components A, B and C.

13. A process for producing compositions which crosslink to form elastomers as claimed in claim 3, which comprises mixing the components A, B and C.

14. A process for producing compositions which crosslink to form elastomers as claimed in claim 8, which comprises mixing the components A, B and C.

15. A molding, seal or sealing composition which has been produced from a composition as claimed in claim 1.

16. A molding, seal or sealing composition which has been produced from a composition as claimed in claim 8.

17. A process for producing moldings, seals or sealing compositions, which comprises casting compositions as claimed in one or more of claim 1.

18. The process as claimed in claim 17 for producing a seal, wherein said composition is cast into a groove.

19. A process for producing moldings, seals or sealing compositions, which comprises applying a composition as claimed in claim 1 to a surface without provision of a mold.