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US4503208A Expired / Lapsed US ⏱️ 0.0 years remaining

Acrylic functional silicone copolymers

Assignee: LOCITE Corp
•
Filing: 1984-01-30
•
Granted: 1985-03-05
•
Expires: 2004-01-30
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Abstract

Abstract Novel copolymeric silicones including repeat units of the formula R.sub.a.sup.1 R.sub.b.sup.2 SiO.sub.(4-a-b)/2 (I) and repeat units of the formula R.sub.a.sup.3 R.sub.b.sup.4 SiO.sub.(4-a-b)/2 (II) where R 1 , R 2 and R 3 are the same or different alkyl, haloalkyl, aryl, substituted aryl, alkoxy or aryloxy groups; R 4 is ##STR1## where R 5 is H or alkyl and R 6 is an unsaturated divalent hydrocarbon group; a is an integer from 0-2, b is an integer from 1-3 and a+b=1, 2 or 3; and the repeat units of formula II represent no more than about 30% of the total copolymer repeat units. The copolymers may be rapidly cured by UV light to give useful elastomers or coating films. They may also be cured with traditional peroxide methods including heat and anaerobic activated methods. They are readily prepared by hydrosilation of acrylate or 2-alkylacrylate esters of acetylenic alcohols with SiH functional silicones.

Inventors

  • 👤 Samuel Q. S. Lin
  • 👤 Steven T. Nakos

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 14:31
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/46; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C08G77/04; C08G77/20; C08G77/38

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 128 words
A method of preparing an acrylic functional copolymer comprising reacting by hydrosilation reaction a silicon hydride functional silicone copolymer comprising repeat units of the formula R.sub.a.sup.1 R.sub.b.sup.2 SiO.sub.(4-a-b)/2 (I) and repeat units of the formula R.sub.a.sup.3 R.sub.b.sup.4' SiO.sub.(4-a-b)/2 (II) where R 1 , R 2 and R 3 are the same or different alkyl, haloalkyl, aryl, substituted aryl, alkoxy or aryloxy groups; R 4' is H; a is an integer from 0-2, b is an integer from 1-3 and a+b=1, 2 or 3; and the repeat units of formula II represent no more than 30% of the total copolymer repeat units, with an acrylic ester of an acetylenic alcohol having the formula ##STR4## where R 5 is H or alkyl and R 6' is an acetylenic hydrocarbyl group.
Claim 2
Independent Claim 128 words
A method of preparing an acrylic functional copolymer comprising reacting by hydrosilation reaction a silicon hydride functional silicone copolymer comprising repeat units of the formula R.sub.a.sup.1 R.sub.b.sup.2 SiO.sub.(4-a-b)/2 (I) and repeat units of the formula R.sub.a.sup.3 R.sub.b.sup.4' SiO.sub.(4-a-b)/2 (II) where R 1 , R 2 and R 3 are the same or different alkyl, haloalkyl, aryl, substituted aryl, alkoxy or aryloxy groups; R 4' is H; a is an integer from 0-2, b is an integer from 1-3 and a+b=1, 2 or 3; and the repeat units of formula II represent no more than 30% of the total copolymer repeat units, with an acrylic ester of an acetylenic alcohol having the formula ##STR4## where R 5 is H or alkyl and R 6' is an acetylenic hydrocarbyl group.
Claim 3
Dependent Claim 19 words
A method as in claim 1 wherein the hydrosilation reaction is conducted at a temperature below about 100° C.
Claim 4
Dependent Claim 21 words
A method as in claim 1 wherein the hydrosilation reaction is conducted in the presence of a platinum or rhodium catalyst.
Claim 5
Dependent Claim 13 words
A method as in claim 1 wherein said acrylic ester is propargyl acrylate.
Claim 6
Dependent Claim 23 words
A method as in claim 1 wherein the said silicon hydride functional silicone contains no more than 10% silicon hydride containing repeat units.
Claim 7
Dependent Claim 28 words
A method as in claim 1 wherein between about 0.3% and 5% of the repeat units in said silicon hydride functional silicone are silicone hydride functional repeat units.

References Cited (Backward Citations)

US3555051A Cited
US3746734A Cited
US3878263A Cited
US4391963A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-03-04 1988-09-03 1989-03-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-03-04 1992-09-03 1993-03-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-03-04 1996-09-03 1997-03-05 $7700.00 Window Closed / Lapsed

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