US4157360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoformable compositions comprising a crosslinked polycyanurate polymer and a thermoplastic polymer
Assignee: Honeywell International Inc
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Filing: 1978-04-26
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Granted: 1979-06-05
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Expires: 1998-04-26
Abstract
Abstract {PG,1 A composition is described, useful as a thermoformable polymer, for producing shaped articles having high yield and impact strengths, good heat resistance, and good solvent resistance. The composition, which is cured, contains a crosslinked polycyanurate network polymer in which a high molecular weight thermoplastic polymer, such as a polyestercarbonate, is finely dispersed. The composition possesses a Vicat softening temperature (ASTM 1525) of at least about 10{20 {0 C. above that of said thermoplastic polymer alone, and an elongation-at-break value (ASTM D-638, at room temperature) at least twice that of said crosslinked polymer alone. Due to the high yield strength, lighter structural articles and components can be fabricated from the composition possessing high structural strength.
Inventors
- 👤 Dusan C. Prevorsek
- 👤 Daniel C. Chung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08G63/00; C08G63/64; C08G63/68; C08G63/685; C08K; C08K5/00; C08K5/16; C08K5/32; C08L; C08L69/00; C08L69/005; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
74 words
A cured composition consisting essentially of a crosslinked cyanurate polymer and a thermoplastic polymer of at least film-forming molecular weight, wherein the composition possesses: (a) a Vicat softening temperature of at least about 10° C. above that of said linear polymer alone, as determined by ASTM 1525; and, (b) an elongation-at-break value which is at least twice as great as that of said crosslinked polymer alone, as determined by ASTM D-638, at room temperature.
Claim 2
Dependent Claim
74 words
A cured composition consisting essentially of a crosslinked cyanurate polymer and a thermoplastic polymer of at least film-forming molecular weight, wherein the composition possesses: (a) a Vicat softening temperature of at least about 10° C. above that of said linear polymer alone, as determined by ASTM 1525; and, (b) an elongation-at-break value which is at least twice as great as that of said crosslinked polymer alone, as determined by ASTM D-638, at room temperature.
Claim 3
Dependent Claim
70 words
The composition of claim 1 wherein the crosslinked polymer is formed by polycyclotrimerizing an aromatic dicyanate monomer of the formula: NCO--R--OCN wherein R comprises at least one aromatic moiety and contains 6-40 carbon atoms, in which the aromatic rings may be further substituted with groups, inert during the polymerization, selected from halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy and C 1 -C 4 alkyl carboxylic ester.
Claim 4
Dependent Claim
49 words
The composition of claim 2 wherein R of said compound is a: (a) diphenol moiety; (b) diphenolester moiety, formed from aromatic dicarboxylic acid and diphenol; (c) diphenolcarbonate moiety, formed from diphenol and carbonate precursor; (d) diphenolestercarbonate moiety, formed from aromatic dicarboxylic acid, diphenol and carbonate precursor; or mixtures thereof.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein R is ##STR3## or mixtures thereof.
Claim 6
Dependent Claim
21 words
The composition of claim 1 wherein said crosslinked polymer alone has an elongation-at-break value of about 0.5 to about 5 percent.
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein said linear polymer alone has a Vicat softening temperature of at least about 50° C.
Claim 8
Dependent Claim
22 words
The composition of claim 1 wherein said linear polymer has a number-average molecular weight, M n , of at least about 10,000.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein said thermoplastic polymer is a polyestercarbonate.
Claim 10
Dependent Claim
18 words
The composition of claim 8 wherein said polyestercarbonate is formed from phosgene, bisphenol-A, terephthalic acid, or equivalents thereof.
Claim 11
Dependent Claim
15 words
The composition of claim 9 wherein said crosslinked polymer is a polycyanurate of 2,2-bis(4-cyanatophenyl) propane.
Claim 12
Dependent Claim
21 words
The composition of claim 10 wherein said crosslinked polymer and said thermoplastic polymer are present in about a 1:1 weight ratio.
Claim 13
Dependent Claim
16 words
The composition of claim 10 having a Vicat softening temperature of at least about 170° C.
Claim 14
Dependent Claim
28 words
A pre-cured composition comprising an intimate mixture of a thermoplastic polymer and an aromatic dicyanate monomer, said composition capable of forming the composition of claim 1 upon heating.
Claim 15
Dependent Claim
13 words
The composition of claim 13, partially cured by heating above about 200° C.
Claim 16
Dependent Claim
40 words
A process for producing the pre-cured composition of claim 13 comprising the step of removing solvent from a solution of thermoplastic polymer and aromatic dicyanate monomer at a rate to cause simultaneous precipitation of the thermoplastic polymer and dicyanate monomer.
Claim 17
Dependent Claim
25 words
A process for producing the pre-cured composition of claim 13 comprising the steps of mixing a melt containing a thermoplastic polymer and aromatic dicyanate monomer.
Claim 18
Dependent Claim
69 words
A process for producing the cured composition of claim 1 comprising the steps of: (a) removing solvent from a solution containing thermoplastic polymer and aromatic dicyanate monomer, at a rate to cause simultaneous precipitation of the thermoplastic polymer and the monomer thereby producing an intimate mixture of said polymer and monomer; and (b) heating said intimate mixture at a temperature above about 200° C., thereby producing crosslinked cyanurate polymer.
Claim 19
Dependent Claim
55 words
A process for producing the cured composition of claim 1 comprising the steps of: (a) mixing a melt containing a thermoplastic polymer and aromatic dicyanate monomer thereby producing an intimate mixture of said thermoplastic polymer and monomer; and (b) heating said intimate mixture at a temperature above about 200° C., thereby producing crosslinked cyanurate polymer.
Claim 20
Dependent Claim
10 words
A shaped article comprising the cured composition of claim 1.
Claim 21
Dependent Claim
11 words
The article of claim 19 where said article is a windscreen.
Claim 22
Dependent Claim
10 words
A reinforced composition comprising the cured composition of claim 1.
Claim 23
Dependent Claim
11 words
An article having the cured composition of claim 1 deposited thereon.
Claim 24
Dependent Claim
11 words
The article of claim 22 wherein said article is a wire.
Claim 25
Dependent Claim
10 words
The article of claim 22 wherein said article is thermoplastic.
Claim 26
Dependent Claim
11 words
A shaped article comprising the partially cured composition of claim 14.
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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) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |