US5411999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy-polyester, polycarbonate, metal phosphate and rubbery modifier
Assignee: SABIC Global Technologies BV
•
Filing: 1994-08-22
•
Granted: 1995-05-02
•
Expires: 2014-08-22
Abstract
Abstract A composition useful in the fabrication of molded articles contains a blend of a polycarbonate, a high impact rubbery modifier such as a core-shell polymer and a catalyst quencher selected from a Group IB or IIB metal phosphate salts such as sodium dihydrogen phosphate wherein the hydroyltic stability is improved via the incorporation of an epoxy-functional polyester derived from the reaction of a polyfunctional epoxy compound and a carboxylic acid-functional polyester.
Inventors
- 👤 Robert R. Gallucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:24
CPC Classifications
C; C08; C08L; C08L63/00; C08L69/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
102 words
A polyester-polycarbonate composition comprising (a) polyester having epoxy functionality, (b) polycarbonate, (c) a high impact rubbery modifier, and (d) a catalyst quencher selected from the group consisting of Group IB metal phosphate salts, Group IIB metal phosphate salts, and salts of the formula M.sup.z.sub.x H.sub.y P.sub.n O.sub.3n+1 wherein M is a metal, x is a number ranging from 1 to 12, and y is a number ranging from 1 to 12, n is a number in the range of 1 to 10, z is a number in the range of 1 to 5, and the sum of xz+y is equal to n+2.
Claim 2
Dependent Claim
102 words
A polyester-polycarbonate composition comprising (a) polyester having epoxy functionality, (b) polycarbonate, (c) a high impact rubbery modifier, and (d) a catalyst quencher selected from the group consisting of Group IB metal phosphate salts, Group IIB metal phosphate salts, and salts of the formula M.sup.z.sub.x H.sub.y P.sub.n O.sub.3n+1 wherein M is a metal, x is a number ranging from 1 to 12, and y is a number ranging from 1 to 12, n is a number in the range of 1 to 10, z is a number in the range of 1 to 5, and the sum of xz+y is equal to n+2.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 wherein the polyester has epoxy functionality in an amount in the range of about 20 meg/kg to about 200 meg/kg.
Claim 4
Dependent Claim
27 words
A composition according to claim 1 wherein the polyester having epoxy functionality is a reaction product of polyester having carboxylic acid functionality and a polyfunctional epoxy compound.
Claim 5
Dependent Claim
28 words
A composition according to claim 1 wherein the polyester having epoxy functionality is a reaction product of a polyester having carboxylic acid functionality and a difunctional epoxy compound.
Claim 6
Dependent Claim
22 words
A composition according to claim 3 further comprising a catalyst suitable for promoting the reaction of the polyester and polyfunctional epoxy compound.
Claim 7
Dependent Claim
13 words
A composition according to claim 3, wherein said polyester is a polyalkylene terephthalate.
Claim 8
Dependent Claim
25 words
A composition according to claim 3, wherein said polyester is selected from the group consisting of a poly(1, 4-butylene terephthalate), poly(ethylene terephthalate), and blends thereof.
Claim 9
Dependent Claim
13 words
A composition according to claim 3, wherein said polyester comprises poly(1, 4-butylene terephthalate).
Claim 10
Dependent Claim
19 words
The composition according to claim 1, wherein said high impact modifier is an acrylonitrile-butadiene-styrene copolymer or a methacrylate-butadiene-styrene copolymer.
Claim 11
Dependent Claim
29 words
A composition according to claim 3, wherein the polyfunctional epoxy compound is added in an amount ranging from about 0.5 to about 5.0 percent by weight of the polyester.
Claim 12
Dependent Claim
29 words
A composition according to claim 3, wherein the polyfunctional epoxy compound is added in an amount ranging from about 1.5 to about 3.0 percent by weight of the polyester.
Claim 13
Dependent Claim
15 words
A composition according to claim 3, wherein the polyfunctional epoxy compound is a cycloaliphatic diepoxide.
Claim 14
Dependent Claim
25 words
A composition according to claim 12, wherein the diepoxide is selected from the group consisting of bis(3, 4-epoxycyclohexylmethyl)adipate; vinylcyclohexene diepoxide; 3, 4-epoxycyclohexyl-3,4-epoxycyclohexylcarboxylte; and mixtures thereof.
Claim 15
Dependent Claim
16 words
A composition according to claim 12, wherein the polyfunctional epoxy compound is 3, 4-epoxycyclohexylmethyl-3, 4-epoxycyclohexane carboxylate.
Claim 16
Dependent Claim
26 words
A composition according to claim 1, wherein said catalyst quencher is selected from the group consisting of metal acid phosphates, metal acid pyrophosphates, and metal polyphosphates.
Claim 17
Dependent Claim
30 words
A composition according to claim 1, wherein said catalyst is selected from the group consisting of sodium dihydrogen phosphate, sodium acid pyrophosphate, zinc phosphate, zinc acid phosphate, and mixtures thereof.
Claim 18
Dependent Claim
9 words
A composition according to claim 1 further comprising filler.
Claim 19
Dependent Claim
12 words
A composition according to claim 17, wherein the filler is glass fiber.
References Cited (Backward Citations)
US2465319A
Cited
US3028365A
Cited
US3275601A
Cited
US3030331A
Cited
US3169121A
Cited
US3047539A
Cited
US2999835A
Cited
US3334154A
Cited
US3635895A
Cited
US3915926A
Cited
US3978020A
Cited
US4020122A
Cited
US3886104A
Cited
US3937751A
Cited
US3979477A
Cited
US3985825A
Cited
US4001184A
Cited
US4071504A
Cited
US4141882A
Cited
US4188314A
Cited
US4246378A
Cited
GB2098231A
Cited
US4401804A
Cited
US4533679A
Cited
US4487896A
Cited
US4532290A
Cited
US4559388A
Cited
US4795771A
Cited
US4904746A
Cited
US4933429A
Cited
US4999388A
Cited
US5087665A
Cited
US5250634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |