US5057358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uv-curable epoxy silicones
Assignee: General Electric Co
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Filing: 1990-03-23
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Granted: 1991-10-15
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Expires: 2010-03-23
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 D. Riding
- 👤 David E. Farley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:34
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: 16
Claim 1
Independent Claim
204 words
An ultraviolet radiation-curable composition having a tensile strength in the range of from about 45 to about 89 pounds per square inch and an elongation in the range of from about 80% to about 140%, comprising: (A) a blend of epoxy-functional dialkylpolysiloxanes comprising by weight: (a) about 5 to about 25 weight % of an epoxy-functional, dialkylpolysiloxane having the general formula ##STR9## 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 dialkylpolysiloxane having the general formula ##STR10## or a mixture of the foregoing, wherein y is a value in the range of about 3 to about 5, and y 1 is a value in the range of about 20 to about 100; and (c) about 45 to about 85 weight % of an epoxy-functional dialkylpolysiloxane having the general formula ##STR11## wherein z is a value in the range of 75 to about 150; wherein E represents an epoxy-functional organic radical having from 2 to 20 carbon atoms and R is individually a lower alkyl radical having 1 to 8 carbon atoms, and (B) a catalytic amount of an onium salt photoinitiator or a combination of onium salt photoinitiators.
Claim 2
Dependent Claim
204 words
An ultraviolet radiation-curable composition having a tensile strength in the range of from about 45 to about 89 pounds per square inch and an elongation in the range of from about 80% to about 140%, comprising: (A) a blend of epoxy-functional dialkylpolysiloxanes comprising by weight: (a) about 5 to about 25 weight % of an epoxy-functional, dialkylpolysiloxane having the general formula ##STR9## 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 dialkylpolysiloxane having the general formula ##STR10## or a mixture of the foregoing, wherein y is a value in the range of about 3 to about 5, and y 1 is a value in the range of about 20 to about 100; and (c) about 45 to about 85 weight % of an epoxy-functional dialkylpolysiloxane having the general formula ##STR11## wherein z is a value in the range of 75 to about 150; wherein E represents an epoxy-functional organic radical having from 2 to 20 carbon atoms and R is individually a lower alkyl radical having 1 to 8 carbon atoms, and (B) a catalytic amount of an onium salt photoinitiator or a combination of onium salt photoinitiators.
Claim 3
Dependent Claim
52 words
The composition of claim 1 wherein Component A comprises about 5 to about 25 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 55 to about 80 weight % of the epoxy-functional diorganopolysiloxane of part (c).
Claim 4
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 80 weight % of the epoxy-functional diorganopolysiloxane of part (c).
Claim 5
Dependent Claim
36 words
The composition of claim 1 wherein x is about 250 to about 510; y is about 3 to about 4; y 1 is about 20 to about 50; and z is about 80 to about 120.
Claim 6
Dependent Claim
33 words
The composition of claim 4 wherein x is about 350 to about 510; y is about 3; y 1 is about 20 to about 30; and z is about 90 to about 110.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein R is a methyl group.
Claim 8
Dependent Claim
16 words
The composition of claim 1 wherein E is derived from 4-vinylcyclohexeneoxide and has the formula: ##STR12##
Claim 9
Dependent Claim
24 words
The composition of claim 1 wherein component (B) is present in an amount in the range of about 0.5% to about 3% by weight.
Claim 10
Dependent Claim
12 words
The composition of claim 1 wherein component (B) is a diaryliodonium salt.
Claim 11
Dependent Claim
12 words
The composition of claim 9 wherein component (B) has the formula ##STR13##
Claim 12
Dependent Claim
13 words
The composition of claim 9 wherein component (B) is bis(dodecyl phenyl) iodonium hexafluoroantimonate.
Claim 13
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 14
Dependent Claim
12 words
The article of claim 12 wherein the substrate is a circuit board.
Claim 15
Independent Claim
206 words
A method for making a UV-curable composition having a tensile strength in the range of from about 45 to about 89 pounds per square inch and an elongation in the range of 80% to about 140%, comprising mixing (A) a blend of epoxy-functional dialkylpolysiloxanes comprising by weight: (a) about 5 to about 25 weight % of an epoxy-functional dialkylpolysiloxane having the general formula ##STR14## 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 dialkylpolysiloxane having the general formula ##STR15## or a mixture of the foregoing, wherein y is a value in the range of about 3 to about 5, and y 1 is a value in the range of about 20 to about 100; and (c) about 45 to about 85 weight % of an epoxy-functional dialkylpolysiloxane having the general formula ##STR16## wherein z is a value in the range of 75 to about 150; wherein E represents an epoxy-functional organic radical having from 2 to 20 carbon atoms and R is individually a lower alkyl radical having 1 to 8 carbon atoms, and (B) a catalytic amount of an onium salt photoinitiator or a combination of onium salt photoinitiators.
Claim 16
Independent Claim
206 words
A method for making a UV-curable composition having a tensile strength in the range of from about 45 to about 89 pounds per square inch and an elongation in the range of 80% to about 140%, comprising mixing (A) a blend of epoxy-functional dialkylpolysiloxanes comprising by weight: (a) about 5 to about 25 weight % of an epoxy-functional dialkylpolysiloxane having the general formula ##STR14## 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 dialkylpolysiloxane having the general formula ##STR15## or a mixture of the foregoing, wherein y is a value in the range of about 3 to about 5, and y 1 is a value in the range of about 20 to about 100; and (c) about 45 to about 85 weight % of an epoxy-functional dialkylpolysiloxane having the general formula ##STR16## wherein z is a value in the range of 75 to about 150; wherein E represents an epoxy-functional organic radical having from 2 to 20 carbon atoms and R is individually a lower alkyl radical having 1 to 8 carbon atoms, and (B) a catalytic amount of an onium salt photoinitiator or a combination of onium salt photoinitiators.
References Cited (Backward Citations)
US4421904A
Cited
US4822687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |