US4831064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organopolysiloxane compositions curable by ultraviolet radiation
Assignee: Dow Silicones Corp
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Filing: 1988-07-11
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Granted: 1989-05-16
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Expires: 2008-07-11
Abstract
Abstract Ultraviolet light-curable compositions which contain a photosensitizer compound and an organosilicon compound which contains (meth)acrylamido-substituted hydrocarbon radicals have improved cure in air when a mercaptoorganosilicon compound is added. The improved compositions are particularly useful as coating compositions for fast-paced operations where the excluding of air from any portion of the curing zone is not desired.
Inventors
- 👤 Padmakumari J. Varaprath
- 👤 Maris J. Ziemelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:34
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/08; C08L83/14; C09; C09D; C09D183/00; C09D183/04; C09D183/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
An ultraviolet light-curable composition comprising (i) a (meth)acrylamidoorganosilicon compound containing at least one silicon-bonded, (meth)acrylamido-substituted hydrocarbon radical having the formula --Q(NAQ') a NAZ wherein a has a value of 0 or 1, Z denotes H or R, R denotes a monovalent hydrocarbon radical, Q and Q' denote divalent hydrocarbon radicals and A denotes a (meth)acrylyl radical having the formula --C(O)CB═CH 2 wherein B denotes hydrogen or methyl; any remaining silicon-bonded radicals in said (meth)acrylamidoorganosilicon compound being selected from the group consisting of organic radicals, divalent oxygen atoms linking silicon atoms, hydrogen atoms and hydroxyl radicals, (ii) a mercaptoorganosilicon compound containing at least one silicon-bonded, mercapto-substituted hydrocarbon radical having the formula --QSH, wherein Q denotes a divalent hydrocarbon radical, any remaining silicon-bonded radicals in said mercaptoorganosilicon compound being selected from the group consisting of organic radicals, divalent oxygen atoms linking silicon atoms, hydrogen atoms and hydroxyl radicals, and (iii) a photopolymerization-initiating amount of a photosensitizer compound; the relative amounts of said (meth)acrylamidoorganosilicon and mercaptoorganosilicon compounds being sufficient to provide from 0.1 to 2 --SH radicals for every --C(O)CB═CH 2 radical.
Claim 2
Dependent Claim
179 words
An ultraviolet light-curable composition comprising (i) a (meth)acrylamidoorganosilicon compound containing at least one silicon-bonded, (meth)acrylamido-substituted hydrocarbon radical having the formula --Q(NAQ') a NAZ wherein a has a value of 0 or 1, Z denotes H or R, R denotes a monovalent hydrocarbon radical, Q and Q' denote divalent hydrocarbon radicals and A denotes a (meth)acrylyl radical having the formula --C(O)CB═CH 2 wherein B denotes hydrogen or methyl; any remaining silicon-bonded radicals in said (meth)acrylamidoorganosilicon compound being selected from the group consisting of organic radicals, divalent oxygen atoms linking silicon atoms, hydrogen atoms and hydroxyl radicals, (ii) a mercaptoorganosilicon compound containing at least one silicon-bonded, mercapto-substituted hydrocarbon radical having the formula --QSH, wherein Q denotes a divalent hydrocarbon radical, any remaining silicon-bonded radicals in said mercaptoorganosilicon compound being selected from the group consisting of organic radicals, divalent oxygen atoms linking silicon atoms, hydrogen atoms and hydroxyl radicals, and (iii) a photopolymerization-initiating amount of a photosensitizer compound; the relative amounts of said (meth)acrylamidoorganosilicon and mercaptoorganosilicon compounds being sufficient to provide from 0.1 to 2 --SH radicals for every --C(O)CB═CH 2 radical.
Claim 3
Dependent Claim
18 words
An ultraviolet light-curable composition according to claim 1 wherein the (meth)acrylamidoorganosilicon compound and the mercaptoorganosilicon compound are siloxanes.
Claim 4
Dependent Claim
69 words
An ultraviolet light-curable composition according to claim 1 wherein the (meth)acrylamidoorganosilicon compound has the formula YR.sup.2 SiO(R.sup.2 SiO).sub.x (YRSiO).sub.y Sir.sup.2 Y wherein R contains from 1 to 6 carbon atoms, Y denotes R or --Q(NAQ') a NAZ, x has a value of from 0 to 5000 and y has a value of from 0 to 500; there being at least two (meth)acrylamido-substituted hydrocarbon radicals per molecule of (meth)acrylamidoorganosilicon compound
Claim 5
Dependent Claim
67 words
An ultraviolet light-curable composition according to claim 3 wherein the mercaptoorganosilicon compound has the formula MR.sup.2 SiO(R.sup.2 SiO).sub.x (MRSiO).sub.y SiR.sup.2 M wherein R contains from 1 to 6 carbon atoms, M denotes R or --QSH, x has a value of from 0 to 5000 and y has a value of from 0 to 500; there being at least two mercapto-substituted hydrocarbon radicals per molecule of mercaptoorganosilicon compound.
Claim 6
Dependent Claim
21 words
An ultraviolet light-curable composition according to claim 4 wherein the (meth)acrylamido-substituted hydrocarbon radical has the formula --QNACH 2 CH 2 NAH.
Claim 7
Dependent Claim
15 words
An ultraviolet light-curable composition according to claim 5 wherein each R denotes the methyl radical.
Claim 8
Dependent Claim
56 words
An ultraviolet light-curable composition according to claim 6 wherein the (meth)acrylamidoorganosilicon compound has the formula ##STR2## and the mercaptoorganosilicon compound has the formula ##STR3## wherein, independently at each occurrence, Me denotes a methyl radical, z has a value of from 10 to 2000 and g has a value of from greater than zero to 0.1 z.
Claim 9
Dependent Claim
48 words
An ultraviolet light-curable composition according to claim 7 wherein the (meth)acrylamidoorganosilicon compound has the formula ##STR4## and the mercaptoorganosilicon compound has the formula ##STR5## wherein, independently at each occurrence, z has a value of from 50 to 500 and g has a value of from 3 to 10.
Claim 10
Dependent Claim
30 words
An ultraviolet light-curable composition according to claim 8 wherein the ratio of the total number of --SH radicals to --C(O)CH═CH 2 radicals has a value of from 0.1 to 1.0.
References Cited (Backward Citations)
US3726710A
Cited
GB1433461A
Cited
CA1029491A
Cited
JPS52371A
Cited
US4052529A
Cited
US4070526A
Cited
US4290869A
Cited
JPS5752371A
Cited
EP0174647A2
Cited
US4595471A
Cited
US4596720A
Cited
US4608270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |