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US4536265A Expired / Lapsed US ⏱️ 0.0 years remaining

Siloxane polyphotoinitiators of the substituted acetophenone type

Assignee: Henkel Loctite Corp
•
Filing: 1984-04-19
•
Granted: 1985-08-20
•
Expires: 2004-04-19
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Abstract

Abstract An organopolysiloxane photoinitiator having an average of at least two siloxane units, of which at least an average of one siloxane unit per organopolysiloxane molecule has the formula: X.sub.a R.sub.b SiO.sub.(4-a-b)/2 wherein a is an integer of 1-3, b is a integer of 0-2 and a plus b equals 1-3; R is C 1 -C 10 hydrocarbyl or halogen substituted C 1 -C 10 hydrocarbyl; and X is substituted acetophenone photomoiety of the formula: ##STR1## where R 1 is any substitutent which will not interfere with hydrosilation, n is an integer between 0 and 4; R 2 is organosilyl substituted alkyl or alkenyl; R 3 is H, alkyl or aryl; and R 4 is a divalent hydrocarbon group having between 2 and 10 carbon atoms. The silicones are prepared by hydrosilation of the corresponding olefinically or acetylenically α,α-dialkenylacetophenones or α,α-dialkynylacetophenones.

Inventors

  • 👤 Louis F. Fabrizio
  • 👤 Samuel O. S. Lin
  • 👤 Anthony F. Jacobine

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 02:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415; C08K5/5419; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08G; C08G77/00; C08G77/04; C08G77/38; G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0757; Y; Y10; Y10S; Y10S522/00; Y10S522/904

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 125 words
An organopolysiloxane photoinitiator having an average of at least two siloxane units, of which at least an average of one siloxane units per organopolysiloxane molecule has the formula: X.sub.a R.sub.b SiO.sub.(4-a-b)/2 wherein a is an integer of 1-3, b is an integer of 0-2 and a plus b equals 1-3; R is C 1 -C 10 hydrocarbyl or halogen substituted C 1 -C 10 hydrocarbyl; and X is substituted acetophenone photomoiety of the formula: ##STR3## where R 1 is any substituent which will not interfere with hydrosilation, n is an integer between 0 and 4; R 2 is organosilyl substituted alkyl or alkenyl; R 3 is H, alkyl or aryl; and R 4 is a divalent hydrocarbon group having between 2 and 10 carbon atoms.
Claim 2
Dependent Claim 125 words
An organopolysiloxane photoinitiator having an average of at least two siloxane units, of which at least an average of one siloxane units per organopolysiloxane molecule has the formula: X.sub.a R.sub.b SiO.sub.(4-a-b)/2 wherein a is an integer of 1-3, b is an integer of 0-2 and a plus b equals 1-3; R is C 1 -C 10 hydrocarbyl or halogen substituted C 1 -C 10 hydrocarbyl; and X is substituted acetophenone photomoiety of the formula: ##STR3## where R 1 is any substituent which will not interfere with hydrosilation, n is an integer between 0 and 4; R 2 is organosilyl substituted alkyl or alkenyl; R 3 is H, alkyl or aryl; and R 4 is a divalent hydrocarbon group having between 2 and 10 carbon atoms.
Claim 3
Dependent Claim 14 words
A photoinitiator as in claim 1 where R is alkyl, substituted alkyl or aryl.
Claim 4
Dependent Claim 14 words
A photoinitiator as in claim 1 where R 1 is halo, alkyl or alkoxy.
Claim 5
Dependent Claim 9 words
The photoinitiator of claim 1 where n is 0.
Claim 6
Dependent Claim 12 words
The photoinitiator of claim 1 where R 4 is propylene or propenylene.
Claim 7
Dependent Claim 23 words
The photoinitiator of claim 1 where R 2 is (CH 3 ) 3 SiOSi(CH 3 ) 2 C 3 H 6 or trimethylsilylpropyl.
Claim 8
Dependent Claim 32 words
The method of curing a free radical curable silicone resin having acrylic or vinyl functionality comprising subjecting to actinic radiation a composition of said resin and a photoinitiator as in claim 1.
Claim 9
Dependent Claim 21 words
A composition comprising a photoinitiator as in claim 1 and a free radical curable silicone resin with acrylic or vinyl functionality.

References Cited (Backward Citations)

US4273907A Cited
US4337348A Cited
US4391963A Cited
US4477326A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-08-19 1989-02-18 1989-08-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-08-19 1993-02-18 1993-08-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-08-19 1997-02-18 1997-08-20 $7700.00 Window Closed / Lapsed

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