EP0449027A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
UV-Curable epoxy silicones
Assignee: General Electric Co
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Filing: 1991-03-12
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Granted: —
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Expires: 2011-03-12
Abstract
Abstract UV-curable compositions are provided comprising blends of epoxy-functional silicones of various chain lengths. These compositions have improved physical properties as compared to otherwise weak and brittle UV-cured epoxy-functional silicones without adding fillers and without sacrificing fast, efficient UV cure speed. Such compositions are useful as conformal coatings, optical fiber coatings, and electrical encapsulation.
Inventors
- 👤 Karen Dorothy Riding
- 👤 David Elmer Farley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 08:55
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08L; C08L83/00; C08L83/04; C08L83/06; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/306; C08G59/68; C09; C09D; C09D183/00; C09D183/04; C09D183/06; H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285; H05K3/287; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
145 words
An ultraviolet radiation-curable composition comprising; (A) a blend of epoxy-functional diorganopolysiloxanes comprising by weight: (a) about 5 to about 25 weight % of an epoxy-functional diorganopolysiloxane having the general formula wherein x is a value in the range of about 200 to about 550; (b) about 10 to about 30 weight % of an epoxy-functional diorganopolysiloxane having the general formula or the general formula: or a mixture of the foregoing, wherein y is a value in the range of about 3 to about 5, and y¹ is a value in the range of about 20 to about 100; and (c) about 45 to about 85 weight % of an epoxy-functional diorganopolysiloxane having the general formula wherein z is a value in the range of 75 to about 150; and (B) a catalytic amount of an onium salt photoinitiator or a combination of onium salt photoinitiators.
Claim 2
Dependent Claim
52 words
The composition of claim 1 wherein Component A comprises about 5 to about 20 weight % of the epoxy-functional diorganopolysiloxane of part (a); about 15 to about 25 weight % of the epoxy-functional diorganopolysiloxane of part (b); and about 45 to about 80 weight % of the epoxy-functional diorganopolysiloxane of part (c).
Claim 3
Dependent Claim
52 words
The composition of claim 2 wherein Component A comprises about 10 to about 20 weight % of the epoxy-functional diorganopolysiloxane of part (a); about 15 to about 20 weight % of the epoxy-functional diorganopolysiloxane of part (b); and about 60 to about 75 weight % of the epoxy-functional diorganopolysiloxane of part (c).
Claim 4
Dependent Claim
35 words
The composition of claim 1 wherein x is about 250 to about 510; y is about 3 to about 4; y¹ is about 3 to about 4; and z is about 80 to about 120.
Claim 5
Dependent Claim
29 words
The composition of claim 4 wherein x is about 350 to about 510; y is about 3; y¹ is about 3; and z is about 90 to about 110.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein R is a methyl group.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein R¹ is a phenylene radical.
Claim 8
Dependent Claim
15 words
The composition of claim 1 wherein E is derived from 4-vinylcyclohexeneoxide and has the formula:
Claim 9
Dependent Claim
22 words
The composition of claim 1 wherein component (B) is present in an amount in the range of about 0.5 to about 3.
Claim 10
Dependent Claim
12 words
The composition of claim 1 wherein component (B) is a diaryliodonium salt.
Claim 11
Dependent Claim
11 words
The composition of claim 10 wherein component (B) has the formula
Claim 12
Dependent Claim
13 words
The composition of claim 1 wherein component (B) is bis(dodecyl phenyl) iodonium hexafluoroantimonate.
Claim 13
Independent Claim
149 words
A method for making a UV-curable composition, comprising mixing (A) a blend of epoxy-functional diorganopolysiloxanes comprising by weight: (a) about 5 to about 25 weight % of an epoxy-functional diorganopolysiloxane having the general formula wherein x is a value in the range of about 200 to about 550; (b) about 10 to about 30 weight % of an epoxy-functional diorganopolysiloxane having the general formula or the general formula: or a mixture of the foregoing, wherein y is a value in the range of about 3 to about 5, and y¹ is a value in the range of about 20 to about 100; and (c) about 45 to about 85 weight % of an epoxy-functional diorganopolysiloxane having the general formula wherein z is a value in the range of 75 to about 150; and (B) a catalytic amount of an onium salt photoinitiator or a combination of onium salt photoinitiators.
Claim 14
Dependent Claim
22 words
An article of manufacture, comprising a substrate having disposed on the surface thereof a coating comprising the cured composition of claim 1.
Claim 15
Dependent Claim
12 words
The article of claim 15, wherein the substrate is a circuit board.
References Cited (Backward Citations)
No citation records indexed.
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