US4595635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organopolysiloxane materials having decreased surface tack
Assignee: Tyco International Ltd Bermuda
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Filing: 1985-05-02
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Granted: 1986-06-17
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Expires: 2005-05-02
Abstract
Abstract This invention provides organopolysiloxane materials having cone penetration between about 100 and about 350 (10-1 mm) and ultimate elongation of at least 100% and having reduced surface tack. This invention provides three methods of obtaining said materials with reduced surface tack. The first method comprises applying to the surface of such material an organic peroxide or a photoinitiator and irradiating the surface with ultraviolet light to further crosslink the surface to reduce or eliminate the tack of the surface. The second method comprises mixing a photoinitiator, such as benzophenone, in an organopolysiloxane fluid, thermally crosslinking the organopolysiloxane fluid to produce the material with the above cone penetration and ultimate elongation then irradiating the surface of the material with ultraviolet light to reduce or eliminate the tack of the surface. The third method comprises mixing a photoinitiator, such as benzophenone, in an organopolysiloxane fluid, crosslinking the fluid by irradiating a layer of the fluid with ultraviolet light to produce the above cone penetration and ultimate elongation properties then further irradiating the crosslinked material to reduce or eliminate the surface tack; this method can be carried out by simultaneous irradiation with ultraviolet light from two sides of a layer of the organopolysiloxane wherein one surface is irradiated at a higher intensity than the other surface. The materials produced by this invention are useful as tapes and sealants.
Inventors
- 👤 Robert S. Dubrow
- 👤 Catherine A. Dittmer
- 👤 William D. Uken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:06
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; B; B29; B29C; B29C71/00; B29C71/04; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29K; B29K2083/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
84 words
A method of reducing the surface tack of crosslinked organopolysiloxane materials having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation at least about 100% which comprises: applying to the surface of said material an effective amount of an organic peroxide or a photoinitiator; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 2
Independent Claim
84 words
A method of reducing the surface tack of crosslinked organopolysiloxane materials having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation at least about 100% which comprises: applying to the surface of said material an effective amount of an organic peroxide or a photoinitiator; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein the organic peroxide comprises benzoyl peroxide.
Claim 4
Dependent Claim
11 words
A method according to claim 1 wherein the photoinitiator comprises benzophenone.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein the peroxide comprises tert-butyl peroxy benzoate.
Claim 6
Dependent Claim
13 words
A method according to claim 1 wherein the photoinitiator comprises a substituted acetophenone.
Claim 7
Independent Claim
108 words
A method of producing a crosslinked organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least about 100% and having reduced surface tack which comprises: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; thermally crosslinking said organopolysiloxane fluid to a cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100%; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 8
Independent Claim
108 words
A method of producing a crosslinked organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least about 100% and having reduced surface tack which comprises: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; thermally crosslinking said organopolysiloxane fluid to a cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100%; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 9
Dependent Claim
11 words
A method according to claim 6 wherein the photoinitiator comprises benzophenone.
Claim 10
Dependent Claim
13 words
A method according to claim 6 wherein the photoinitiator comprises a substituted acetophenone.
Claim 11
Dependent Claim
11 words
A method according to claim 6 wherein the photoinitiator comprises anthraquinone.
Claim 12
Dependent Claim
11 words
A method according to claim 6 wherein the photoinitiator comprises triphenylamine.
Claim 13
Independent Claim
118 words
A method of producing a crosslinked organopolysiloxane material having cone penetration between about 100 and 350 (10 -1 mm) and ultimate elongation of at least about 100% and having reduce surface tack which comprises: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; crosslinking said organopolysiloxane fluid to a material having cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100% by irradiating said fluid with ultraviolet light; and irradiating a surface of said material with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 14
Independent Claim
118 words
A method of producing a crosslinked organopolysiloxane material having cone penetration between about 100 and 350 (10 -1 mm) and ultimate elongation of at least about 100% and having reduce surface tack which comprises: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; crosslinking said organopolysiloxane fluid to a material having cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100% by irradiating said fluid with ultraviolet light; and irradiating a surface of said material with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 15
Dependent Claim
17 words
A method according to claim 11 wherein the organopolysiloxane further contains an organic peroxide in mixture therewith.
Claim 16
Dependent Claim
11 words
A method according to claim 11 wherein the photoinitiator comprises benzophenone.
Claim 17
Dependent Claim
34 words
A method according to claim 11 wherein the crosslinking of the organopolysiloxane fluid is effected simultaneously with the crosslinking of the surface by irradiating two sides of the fluid with different intensity ultraviolet light.
Claim 18
Dependent Claim
81 words
An organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least 100% and having reduced surface tack formed by: applying to the surface of said material an effective amount of an organic peroxide or a photoinitiator; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 19
Dependent Claim
81 words
An organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least 100% and having reduced surface tack formed by: applying to the surface of said material an effective amount of an organic peroxide or a photoinitiator; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 20
Dependent Claim
102 words
An organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least 100% and having reduced surface tack formed by: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; thermally crosslinking said organopolysiloxane fluid to a cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100%; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 21
Dependent Claim
102 words
An organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least 100% and having reduced surface tack formed by: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; thermally crosslinking said organopolysiloxane fluid to a cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100%; and irradiating the surface with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 22
Dependent Claim
113 words
An organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least 100% and having reduced surface tack formed by: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; crosslinking said organopolysiloxane fluid to a material having cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100% by irradiating said fluid with ultraviolet light; and irradiating the surfce of said material with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 23
Dependent Claim
113 words
An organopolysiloxane material having cone penetration between about 100 and about 350 (10 -1 mm) and ultimate elongation of at least 100% and having reduced surface tack formed by: mixing in an organopolysiloxane fluid an effective amount of a photoinitiator; crosslinking said organopolysiloxane fluid to a material having cone penetration between about 100 and about 350 (10 -1 mm) and an ultimate elongation of at least about 100% by irradiating said fluid with ultraviolet light; and irradiating the surfce of said material with ultraviolet light to effect a further crosslinking of the surface of said material to reduce the surface tack thereof without effecting significant further crosslinking of said material below said surface.
Claim 24
Dependent Claim
11 words
A substrate having disposed thereon a material according to claim 15.
Claim 25
Dependent Claim
11 words
A substrate having disposed thereon a material according to claim 16.
Claim 26
Dependent Claim
11 words
A substrate having disposed thereon a material according to claim 17.
References Cited (Backward Citations)
US4163082A
Cited
US4496696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |