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US4477326A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyphotoinitiators and compositions thereof

Assignee: Henkel Loctite Corp
•
Filing: 1983-06-20
•
Granted: 1984-10-16
•
Expires: 2003-06-20
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Abstract

Abstract Polysiloxane polymers with photoinitiating functionality. The polymers may be obtained by reacting α-allylbenzoin ethers with a siloxane or polysiloxane containing a plurality of silicon hydride groups. Alternatively, the allylbenzoin ethers may be reacted with a hydrolyzable hydrosilane and further reacted with other hydrolyzable organosilanes or siloxanes to form the polysiloxane with pendant photoinitiating benzoin ether groups. The other hydrolyzable silanes or siloxanes may include photocurable groups to yield self curing polymers. In the same manner, photoinitiating siloxane polymers of the first method may be further polymerized to yield self curing products. The photoinitiating polymers may also be combined with ethylenically unsaturated monomers or other silicones with photocurable groups to yield photocurable compositions.

Inventors

  • 👤 Samuel Q. S. Lin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 05:56
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/14; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F299/00; C08F299/02; C08F299/08; C08G77/38; Y; Y10; Y10S; Y10S522/00; Y10S522/904

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 74 words
A UV curable composition comprising a mixture of an organosiloxane polymer and at least one ethylenically unsaturated free radical polymerizable organic monomer, the organosiloxane polymer including a plurality of photoinitiating units along the chain thereof the units having the formula: ##STR10## wherein R 1 is alkyl, aryl, alkoxy, substituted alkyl or substituted aryl; R 2 is alkyl, aryl, substituted alkyl or substituted aryl; and R 3 and R 4 are phenyl or substituted phenyl.
Claim 2
Dependent Claim 74 words
A UV curable composition comprising a mixture of an organosiloxane polymer and at least one ethylenically unsaturated free radical polymerizable organic monomer, the organosiloxane polymer including a plurality of photoinitiating units along the chain thereof the units having the formula: ##STR10## wherein R 1 is alkyl, aryl, alkoxy, substituted alkyl or substituted aryl; R 2 is alkyl, aryl, substituted alkyl or substituted aryl; and R 3 and R 4 are phenyl or substituted phenyl.
Claim 3
Dependent Claim 36 words
A composition as in claim 1 wherein the ethylenically unsaturated monomer is selected from the group consisting of acrylate, methacrylate, maleate and itaconate esters; vinyl ketones; styrenes; acrylamide, methacrylamide and their N-substituted derivatives, and mixtures thereof.
Claim 4
Dependent Claim 26 words
A composition as in claim 1 wherein said organosiloxane polymer is present in the range of between about 1% and 70% by weight of the composition.
Claim 5
Dependent Claim 26 words
A composition as in claim 1 wherein said organosiloxane polymer is present in the range of between about 5% and 40% by weight of the composition.
Claim 6
Dependent Claim 21 words
A composition as in claim 1 further comprising an inhibitor selected from the group consisting of hydroquinone, benzoquinone and hindered phenols.
Claim 7
Dependent Claim 23 words
A composition as in claim 1 wherein the ethylenically unsaturated monomer is selected from cyclohexylmethacrylate, tetrahydrofurfural methacrylate, hexanediol dimethacrylate, isobornylacrylate, and mixtures thereof.
Claim 8
Dependent Claim 9 words
A cured product of the composition of claim 1.

References Cited (Backward Citations)

JPS5134291A Cited
JPS5371199A Cited
JPS5450067A Cited
US4273907A Cited
US4391963A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-10-16 1988-04-16 1988-10-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-10-16 1992-04-16 1992-10-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-10-16 1996-04-16 1996-10-16 $7700.00 Window Closed / Lapsed

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