Patent US4246370A successfully refreshed from Google Patents.
US4246370A
Expired / Lapsed
US
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Use of novel polymers of alkyl acrylates
Assignee: Rohm and Haas Co
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Filing: 1979-03-05
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Granted: 1981-01-20
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Expires: 1999-03-05
Abstract
Abstract Polymers of esters of acrylic acid having an average chain length of about 6 to about 30 mers are prepared by an anionic polymerization reaction, carried out in the presence of a catalytic amount of an alkoxide anion. These polymers, their hydrolysis products, and their derivatives have a wide variety of applications, including among others use as components in films, coatings, fibers, impregnants, adhesives, and binders, and use as modifiers, plasticizers, melt flow improvers, and leveling agents.
Inventors
- 👤 Sheldon N. Lewis
- 👤 Richard A. Haggard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/625; C08F; C08F265/00; C08F265/04; C08F265/06; C08F8/00; C08F8/12; C08F8/14; C08F8/30; C08F8/44; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08F2810/00; C08F2810/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A process for preparing a carboxyl polymer comprising acrylic acid mer units, the process comprising preparing an alkoxide-polymerized addition polymer of an ester of acrylic acid, said polymer being a homopolymer or a copolymer with one or more other anionically copolymerizable ethylenically-unsaturated monomers wherein the average chain length of the addition polymer, n, is about 6 to about 30 mers and hydrolyzing the addition polymer by heating with aqueous caustic.
Claim 2
Dependent Claim
70 words
A process for preparing a carboxyl polymer comprising acrylic acid mer units, the process comprising preparing an alkoxide-polymerized addition polymer of an ester of acrylic acid, said polymer being a homopolymer or a copolymer with one or more other anionically copolymerizable ethylenically-unsaturated monomers wherein the average chain length of the addition polymer, n, is about 6 to about 30 mers and hydrolyzing the addition polymer by heating with aqueous caustic.
Claim 3
Dependent Claim
71 words
A process for preparing a carboxyl polymer comprising acrylic acid mer units, the process comprising preparing an alkoxide-polymerized addition polymer of an ester of acrylic acid, said polymer being a homopolymer or a copolymer with one or more other anionically copolymerizable ethylenically-unsaturated monomers wherein the average chain length of the addition polymer, n, is about 6 to about 30 mers and hydrolyzing the addition polymer by hydrolysis catalyzed by strong acid.
Claim 4
Dependent Claim
71 words
A process for preparing a carboxyl polymer comprising acrylic acid mer units, the process comprising preparing an alkoxide-polymerized addition polymer of an ester of acrylic acid, said polymer being a homopolymer or a copolymer with one or more other anionically copolymerizable ethylenically-unsaturated monomers wherein the average chain length of the addition polymer, n, is about 6 to about 30 mers and hydrolyzing the addition polymer by hydrolysis catalyzed by strong acid.
Claim 5
Dependent Claim
66 words
A process for preparing a functionalized polymer comprising the steps of preparing an alkoxide polymerized addition polymer of an ester of acrylic acid, said polymer being a homopolymer or a copolymer with one or more other anionically copolymerizable ethylenically-unsaturated monomers wherein the average chain length of the addition polymer, n, is about 6 to about 30 mers and transesterifying the addition polymer with a functional alcohol.
Claim 6
Dependent Claim
66 words
A process for preparing a functionalized polymer comprising the steps of preparing an alkoxide polymerized addition polymer of an ester of acrylic acid, said polymer being a homopolymer or a copolymer with one or more other anionically copolymerizable ethylenically-unsaturated monomers wherein the average chain length of the addition polymer, n, is about 6 to about 30 mers and transesterifying the addition polymer with a functional alcohol.
Claim 7
Dependent Claim
11 words
The process of claim 3 wherein the alcohol is a glycol.
Claim 8
Dependent Claim
12 words
The process of claim 3 wherein the alcohol is an oxazoladinyl ethanol.
Claim 9
Dependent Claim
11 words
The process of claim 3 wherein the alcohol is allyl alcohol.
Claim 10
Dependent Claim
28 words
A process for preparing an acrylic polyurethane prepolymer which comprises the steps of preparing the functionalized polymer of claim 4 and reacting the functionalized polymer with a diisocyanate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |