Patent US5354791A successfully refreshed from Google Patents.
US5354791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy-functional polyester, polycarbonate with metal phosphate
Assignee: SABIC Global Technologies BV
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Filing: 1993-10-19
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Granted: 1994-10-11
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Expires: 2013-10-19
Abstract
Abstract The polyester-polycarbonate blend composition useful as a molding composition shows improved hydrolytic stability. The polyester-polycarbonate comprises polyester having epoxy functionality, polycarbonate, and a catalyst quencher selected from the group of certain quenchers, e.g., metal acid phosphates, metal acid pyrophosphates and metal polyphosphates. Preferred polyesters having epoxy functionality comprise a polyester which is reacted with a difunctional epoxy compound. The invention provides hydrolytic stability which is improved over polyester-polycarbonate compositions which employ other catalyst quenchers for reducing transesterification. The invention also shows hydrolytic stability which is superior to blends in which polyester and polyfunctional epoxy compounds are merely blended with the polycarbonate and catalyst quencher.
Inventors
- 👤 Robert R. Gallucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:25
CPC Classifications
C; C08; C08L; C08L63/00; C08L69/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
96 words
A polyester-polycarbonate composition comprising (a) polyester having epoxy functionality, (b) polycarbonate, and (c) 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
96 words
A polyester-polycarbonate composition comprising (a) polyester having epoxy functionality, (b) polycarbonate, and (c) 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 meq/kg to about 200 meq/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
24 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
12 words
A composition according to claim 3 wherein said polyester comprises poly(1,4-butylene terephthalate).
Claim 10
Dependent Claim
34 words
A composition according to claim 3 wherein said polyester has an intrinsic viscosity of at least about 0.4 deciliters per gram when measured in a 60:40 mixture of phenol and trichloroethane at 25° C.
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
23 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-epoxycyclohexylcarboxylate; and mixtures thereof.
Claim 15
Dependent Claim
14 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
13 words
A composition according to claim 1 wherein the polycarbonate is derived from bisphenol-A.
Claim 19
Dependent Claim
9 words
A composition according to claim 1 further comprising filler.
Claim 20
Dependent Claim
12 words
A composition according to claim 18 wherein the filler is glass fiber.
Claim 21
Independent Claim
129 words
A method of improving the hydrolytic resistance of a blend comprising polyester, polycarbonate and a catalyst quencher, wherein the method comprises reacting the polyester with a polyfunctional epoxy compound to produce a polyester reaction product having epoxy functionality and blending the reaction product with polycarbonate and 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 22
Independent Claim
129 words
A method of improving the hydrolytic resistance of a blend comprising polyester, polycarbonate and a catalyst quencher, wherein the method comprises reacting the polyester with a polyfunctional epoxy compound to produce a polyester reaction product having epoxy functionality and blending the reaction product with polycarbonate and 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 23
Dependent Claim
16 words
A method according to claim 20 wherein the polyfunctional epoxy compound is a difunctional epoxy compound.
Claim 24
Dependent Claim
16 words
A method according to claim 20 wherein the polyfunctional epoxy compound is a difunctional cycloaliphatic epoxide.
Claim 25
Dependent Claim
25 words
A method according to claim 20 wherein the difunctional cycloaliphatic epoxide is selected from the group consisting of bis(3,4-epoxycyclohexylmethyl)adipate; vinylcyclohexene diepoxide; 3,4-epoxycyclohexyl-3,4-epoxycyclohexylcarboxylate; and mixtures thereof.
Claim 26
Dependent Claim
28 words
A method according to claim 20 wherein the polyfunctional epoxy compound is added in an amount raging from about 0.5 to about 5% by weight of the polyester.
Claim 27
Dependent Claim
28 words
A method according to claim 20 wherein the polyfunctional epoxy compound is added in an amount ranging from about 1.5 to about 3.0% by weight of the polyester.
Claim 28
Dependent Claim
34 words
A method according to claim 20 further comprising reacting the polyester and the polyfunctional epoxy compound in the presence of a catalyst effective in promoting the reaction of the polyester and the epoxy compound.
Claim 29
Dependent Claim
14 words
A method according to claim 26 wherein the catalyst is a carboxylic acid salt.
Claim 30
Dependent Claim
31 words
A method according to claim 20 wherein the catalyst quencher is selected from the group consisting of sodium dihydrogen phosphate, sodium acid pyrophosphate, zinc phosphate, zinc acid phosphate, and mixtures thereof.
Claim 31
Dependent Claim
11 words
A method according to claim 14 further comprising adding a filler.
Claim 32
Dependent Claim
12 words
A method according to claim 29 wherein the filler is glass fiber.
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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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |