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US4426509A Expired / Lapsed US ⏱️ 0.0 years remaining

Storable crosslinkable organopolysiloxane molding compositions

Assignee: Bayer AG
•
Filing: 1982-08-26
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Granted: 1984-01-17
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Expires: 2002-08-26
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Abstract

Abstract In a plastic organosiloxane molding composition which in the absence of water is capable of being stored and in the presence of moisture is cross-linked to a rubber, the composition comprising a hydroxypolydiorganosiloxane, a nitrogen base and heavy metal compound as cross-linking catalyst, and a cross-linking agent, the improvement which comprises employing as the cross-linking agent a compound of the formula ##STR1## or a partial hydrolysis product thereof, wherein R is an optionally substituted alkyl, alkenyl or aryl group, R 1 is hydrogen or R, R 2 is an acyl, carbalkoxy or carbaroxy group or R 1 , a is 1-3, and n is 0, 1 or 2 and a+n≦3. Upon curing no unpleasant odors are given off upon decomposition of the cross-linking agent.

Inventors

  • 👤 Gunther Maass
  • 👤 Hans Sattlegger
  • 👤 Hans J. Lucking

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 16:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5425; C08K5/5435; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; Y; Y10; Y10S; Y10S528/00; Y10S528/901

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 109 words
In a plastic organosiloxane molding composition which in the absence of water is capable of being stored and in the presence of moisture is cross-linked to a rubber, the composition comprising a hydroxypolydiorganosiloxane, a base and heavy metal compound as cross-linking catalyst, and a cross-linking agent, the improvement which comprises employing as the cross-linking agent a silane compound of the formula ##STR4## or a partial hydrolysis product thereof, wherein R is an optionally substituted alkyl, alkenyl or aryl group, R 1 is hydrogen or R, R 2 is an acyl, carbalkoxy or carbaroxy group or R 1 , a is 1-3, n is 0, 1 or 2, and a+n≦3.
Claim 2
Dependent Claim 109 words
In a plastic organosiloxane molding composition which in the absence of water is capable of being stored and in the presence of moisture is cross-linked to a rubber, the composition comprising a hydroxypolydiorganosiloxane, a base and heavy metal compound as cross-linking catalyst, and a cross-linking agent, the improvement which comprises employing as the cross-linking agent a silane compound of the formula ##STR4## or a partial hydrolysis product thereof, wherein R is an optionally substituted alkyl, alkenyl or aryl group, R 1 is hydrogen or R, R 2 is an acyl, carbalkoxy or carbaroxy group or R 1 , a is 1-3, n is 0, 1 or 2, and a+n≦3.
Claim 3
Dependent Claim 26 words
A composition according to claim 1, wherein R is methyl or ethyl, R 1 is hydrogen or methyl, and R 2 is hydrogen, methyl or carbalkoxy.
Claim 4
Dependent Claim 28 words
In the preparation of a rubber by exposing to moisture a plastic organosiloxane composition, the improvement which comprises employing as said composition a composition according to claim 1.

References Cited (Backward Citations)

DE2335569A1 Cited
US3819563A Cited
US4180642A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-01-16 1987-07-18 1988-01-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-01-16 1991-07-18 1992-01-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-01-16 1995-07-18 1996-01-17 $7700.00 Window Closed / Lapsed

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