US5214095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable aqueous emulsion copolymers with siloxane functionality
Assignee: Rohm and Haas Co
•
Filing: 1992-01-21
•
Granted: 1993-05-25
•
Expires: 2012-01-21
Abstract
Abstract Stable, aqueous emulsion copolymers with controllable siloxane crosslinking functionality are provided. These copolymers are prepared by a concurrent free radical and cationic initiated emulsion polymerization of at least one free radical initiatable monomer at least one linear siloxane precursor monomer, and at least one bifunctional silane monomer having both free radical polymerizable and silicon functional groups. The copolymers are useful in curable coatings, paints, caulks, adhesives, non-woven and ceramic compositions and as modifiers, processing aids and additives in thermoplastics, cements and asphalts.
Inventors
- 👤 Alvin C. Lavoie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:50
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/442; C14; C14C; C14C11/00; C14C11/003; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; C08F; C08F230/00; C08F230/04; C08F230/08; C08F230/085
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
A stable aqueous emulsion comprising a copolymer having resistance to premature crosslinking at ambient temperatures while containing crosslinkable silicon functionality, said copolymer having been formed by the concurrent free radical and cationic initiated polymerization of from at least about 70 weight percent of at least one free radical initiatable monomer free of silicon functionality and less than about 30 weight percent of at least two silicon-containing monomers where at least one of said silicon-containing monomers is a free radical initiatable, reactive bifunctional silane monomer and where at least one of said silicon-containing monomers is a cationically initiatable, linear siloxane precursor monomers, and further where the molar ratio of (R 2 SiO) D units, obtained from said linear siloxane precursor, which are not bifunctional, to (RSiO 3/2 ) T units, which are all bifunctional, is greater than 3 to 1.
Claim 2
Dependent Claim
139 words
A stable aqueous emulsion comprising a copolymer having resistance to premature crosslinking at ambient temperatures while containing crosslinkable silicon functionality, said copolymer having been formed by the concurrent free radical and cationic initiated polymerization of from at least about 70 weight percent of at least one free radical initiatable monomer free of silicon functionality and less than about 30 weight percent of at least two silicon-containing monomers where at least one of said silicon-containing monomers is a free radical initiatable, reactive bifunctional silane monomer and where at least one of said silicon-containing monomers is a cationically initiatable, linear siloxane precursor monomers, and further where the molar ratio of (R 2 SiO) D units, obtained from said linear siloxane precursor, which are not bifunctional, to (RSiO 3/2 ) T units, which are all bifunctional, is greater than 3 to 1.
Claim 3
Dependent Claim
39 words
The stable aqueous emulsion copolymer of claim 1 comprising from about 70 to about 99.5 weight percent of said silicon-free, free radical initiatable monomer or monomers and from about 30 to about 0.5 weight percent of said silicon-containing monomers.
Claim 4
Dependent Claim
39 words
The stable aqueous emulsion copolymer of claim 1 comprising from about 70 to about 97 weight percent of said silicon-free, free radical initiatable monomer or monomers and from about 30 to about 3 weight percent of said silicon-containing monomers.
Claim 5
Dependent Claim
31 words
The stable aqueous emulsion copolymer of claim 1 wherein said reactive bifunctional silane monomer is present at a concentration of from about 1 to about 6 weight percent on total monomers.
Claim 6
Dependent Claim
59 words
The stable aqueous emulsion copolymer of claim 1 wherein said copolymer having resistance to premature crosslinking at ambient temperatures is a substantially non-crosslinked copolymer formed from about 70 to about 90 weight percent of at least one free radical initiatable, silicon-free monomer and from about 10 to about 30 weight percent of said silane and linear siloxane precursor monomers.
Claim 7
Dependent Claim
19 words
The aqueous emulsion of claim 1 comprising a pH in the range of from about pH6 to about pH8.
Claim 8
Dependent Claim
17 words
The aqueous emulsion copolymer of claim 1 comprising an average particle size less than about 100 nanometers.
Claim 9
Dependent Claim
33 words
The aqueous emulsion copolymer of claims 1, 2, or 3 where said reactive bifunctional silane is a T type silane selected from the group consisting of methacryloxy-propyltrimethoxysilane, acryloxypropyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane and allyltrimethoxy silane.
Claim 10
Dependent Claim
29 words
The aqueous emulsion copolymer of claims 1, 2 or 3 wherein said linear siloxane precursor is selected from the group consisting of cyclic dialkyl siloxanes, monomeric dialkyldialkyoxysilanes and methylphenyldimethoxysilane.
Claim 11
Dependent Claim
11 words
A non-woven binder comprising the aqueous emulsion copolymer of claim 1.
Claim 12
Dependent Claim
11 words
A leather coating comprising the aqueous emulsion copolymer of claim 1.
Claim 13
Dependent Claim
11 words
A paint formulation comprising the aqueous emulsion copolymer of claim 1.
Claim 14
Dependent Claim
10 words
An adhesive comprising the aqueous emulsion copolymer of claim 1.
Claim 15
Independent Claim
91 words
A method of preparing a stable aqueous emulsion copolymer having crosslinkable siloxane functionality comprising a concurrent free radical and cationic initiated aqueous emulsion polymerization of at least one free radical polymerizable, silicon-free monomer, a linear siloxane precursor and a bifunctional silane wherein one group is activated by the cationic and the other group is free radical initiated at low pH conditions followed by neutralization of said emulsion copolymer by the addition thereto of a base to bring the pH of the emulsion within the range of pH 6 to pH 8.
Claim 16
Independent Claim
91 words
A method of preparing a stable aqueous emulsion copolymer having crosslinkable siloxane functionality comprising a concurrent free radical and cationic initiated aqueous emulsion polymerization of at least one free radical polymerizable, silicon-free monomer, a linear siloxane precursor and a bifunctional silane wherein one group is activated by the cationic and the other group is free radical initiated at low pH conditions followed by neutralization of said emulsion copolymer by the addition thereto of a base to bring the pH of the emulsion within the range of pH 6 to pH 8.
References Cited (Backward Citations)
US3294725A
Cited
US3575910A
Cited
US3449293A
Cited
US3729438A
Cited
US3706697A
Cited
US3898300A
Cited
EP0153600A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |