US4374229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resinous molding compositions
Assignee: Ashland LLC
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Filing: 1981-11-12
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Granted: 1983-02-15
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Expires: 2001-11-12
Abstract
Abstract A thermosetting resinous composition characterized in constituting at least two oligomeric polyester segments terminally joined through a polyurethane residue and having end groups containing polymerizable unsaturation. Further disclosed are the thermoset products obtained by the addition polymerization of the aforesaid compositions in the presence or absence of a copolymerizable monomeric crosslinking agent. The resultant thermoset products are particularly useful in preparing molded articles.
Inventors
- 👤 William R. Dunnavant
- 👤 Richard E. Field
- 👤 Dan Borgnaes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08G18/671; C08G18/672; C08G2120/00; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
133 words
A thermosetting resinous composition comprising an organic polyisocyanate coupled oligomeric polyester having a calculated molecular weight of from 200 to 800 terminated at one end with a hydroxy group and at the other end with a vinyl group and wherein the polyisocyanate and polyester are combined in the coupling reaction to provide an NCO/OH equivalent ratio value of from 0.8-1.2, said polyester prepared by the catalytically induced addition reaction of a dicarboxylic acid anhydride selected from the group consisting of maleic anhydride and a mixture of maleic anhydride and phthalic anhydride in which maleic anhydride constitutes the major proportion thereof with a lower alkylene oxide in the presence of methacrylic acid or acrylic acid as the initiator and wherein the maleate residues of said polyester are substantially completely isomerized to corresponding fumarate residues.
Claim 2
Dependent Claim
133 words
A thermosetting resinous composition comprising an organic polyisocyanate coupled oligomeric polyester having a calculated molecular weight of from 200 to 800 terminated at one end with a hydroxy group and at the other end with a vinyl group and wherein the polyisocyanate and polyester are combined in the coupling reaction to provide an NCO/OH equivalent ratio value of from 0.8-1.2, said polyester prepared by the catalytically induced addition reaction of a dicarboxylic acid anhydride selected from the group consisting of maleic anhydride and a mixture of maleic anhydride and phthalic anhydride in which maleic anhydride constitutes the major proportion thereof with a lower alkylene oxide in the presence of methacrylic acid or acrylic acid as the initiator and wherein the maleate residues of said polyester are substantially completely isomerized to corresponding fumarate residues.
Claim 3
Dependent Claim
29 words
The thermosetting resinous composition according to claim 1 wherein the polyisocyanate and polyester are combined in the coupling reaction to provide an NCO/OH equivalent ratio of about 1:1, respectively.
Claim 4
Dependent Claim
26 words
The thermosetting resinous composition according to claim 2 wherein said initiator is methacrylic acid and said polyester having a calculated molecular weight of from about 300-500.
Claim 5
Dependent Claim
26 words
The thermosetting resinous composition according to claim 2 wherein said initiator is acrylic acid and said polyester having a calculated molecular weight of from about 300-500.
Claim 6
Dependent Claim
18 words
The thermosetting resinous composition according to claim 3 or 4 wherein said lower alkylene oxide is propylene oxide.
Claim 7
Dependent Claim
16 words
The thermosetting resinous composition according to claim 5 wherein the dicarboxylic acid anhydride is maleic anhydride.
Claim 8
Dependent Claim
14 words
The thermosetting resinous composition according to claim 6 wherein said polyisocyanate is a diisocyanate.
Claim 9
Dependent Claim
15 words
The thermosetting resinous composition according to claim 7 wherein said diisocyanate is an aromatic diisocyanate.
Claim 10
Dependent Claim
19 words
The thermosetting resinous composition according to claim 7 wherein said aromatic diisocyanate is toluene diisocyanate or methylene diphenyl diisocyanate.
Claim 11
Dependent Claim
47 words
A thermoset resinous composition comprising the catalyzed co-reaction product of from 99-20 parts by weight of the coupled oligomeric polyester of claim 5 and correspondingly from 1-80 parts by weight of a monomeric cross-linking agent containing at least one vinyl group or at least two allyl groups.
Claim 12
Dependent Claim
16 words
The thermoset resinous composition in accordance with claim 10 wherein said monomeric cross-linking agent is styrene.
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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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |