US4219632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low molecular weight isocyanato-acrylate copolymers
Assignee: EIDP Inc
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Filing: 1979-03-02
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Granted: 1980-08-26
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Expires: 1999-03-02
Abstract
Abstract Isocyanatoethyl methacrylate/acrylate (or other vinyl monomer) copolymers of controlled low molecular weight are produced by copolymerizing the monomers with initiators, usually peroxides, at temperatures above 120° C. The copolymers are particularly useful as curing agents for urethane coating compositions.
Inventors
- 👤 John A. Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/728; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/34; C08F220/36
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
126 words
The process of preparing a copolymer of controlled low molecular weight as measured by gel permeation chromatography of (1) at least one compound of the formula ##STR5## wherein R is hydrogen or methyl and A is alkylene of 2-14 carbons, and (2) at least one compound of the formula ##STR6## wherein R' is hydrogen or methyl and X is phenyl, tolyl, cyano, ##STR7## R" being alkyl of 1-8 carbons; which comprises heating the precursor monomers together in an organic solvent at a temperature above 120° C. and in the presence of a polymerization initiator soluble in an organic solvent and having a half life of at least 1 minute at 120° C., the mole ratio of total monomers to initiator being between about 10:1 and 40:1.
Claim 2
Dependent Claim
126 words
The process of preparing a copolymer of controlled low molecular weight as measured by gel permeation chromatography of (1) at least one compound of the formula ##STR5## wherein R is hydrogen or methyl and A is alkylene of 2-14 carbons, and (2) at least one compound of the formula ##STR6## wherein R' is hydrogen or methyl and X is phenyl, tolyl, cyano, ##STR7## R" being alkyl of 1-8 carbons; which comprises heating the precursor monomers together in an organic solvent at a temperature above 120° C. and in the presence of a polymerization initiator soluble in an organic solvent and having a half life of at least 1 minute at 120° C., the mole ratio of total monomers to initiator being between about 10:1 and 40:1.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the mole ratio of total monomers to initiator is between 14:1 and 30:1.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the initiator is an organic peroxide.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the initiator is an azo compound.
Claim 6
Dependent Claim
13 words
The process of claim 1 comprising heating together isocyanatoethyl methacrylate and butyl acrylate.
Claim 7
Dependent Claim
12 words
The process of claim 1 comprising heating together isocyanatoethyl methacrylate and styrene.
Claim 8
Dependent Claim
14 words
The process of claim 1 comprising heating together isocyanatoethyl methacrylate, butyl acrylate and styrene.
Claim 9
Dependent Claim
94 words
A copolymer of (1) between 75-25% by weight of at least one compound of the formula ##STR8## wherein R is hydrogen or methyl and A is alkylene of 2-14 carbons, and (2) at least one compound of the formula ##STR9## wherein R' is hydrogen or methyl and X is phenyl, tolyl, cyano, ##STR10## R" being alkyl of 1-8 carbons; said copolymer having 2-20% by weight NCO, a number average molecular weight M n below 4000 and a weight average molecular weight M w below 8000, molecular weights being in accord with gel permeation chromatography.
Claim 10
Dependent Claim
94 words
A copolymer of (1) between 75-25% by weight of at least one compound of the formula ##STR8## wherein R is hydrogen or methyl and A is alkylene of 2-14 carbons, and (2) at least one compound of the formula ##STR9## wherein R' is hydrogen or methyl and X is phenyl, tolyl, cyano, ##STR10## R" being alkyl of 1-8 carbons; said copolymer having 2-20% by weight NCO, a number average molecular weight M n below 4000 and a weight average molecular weight M w below 8000, molecular weights being in accord with gel permeation chromatography.
Claim 11
Dependent Claim
13 words
A copolymer of claim 8 of the monomers isocyanatoethyl methacrylate and butyl acrylate.
Claim 12
Dependent Claim
12 words
A copolymer of claim 8 of the monomers isocyanatoethyl methacrylate and styrene.
Claim 13
Dependent Claim
14 words
A copolymer of claim 8 of the monomers isocyanatoethyl methacrylate, butyl acrylate and styrene.
Claim 14
Dependent Claim
20 words
A solution of a copolymer of claim 8 in an organic solvent, said solution containing 30-90% by weight of solids.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |