US5441997A — High density polyester-polycarbonate molding comp…

Claim 1

Independent Claim 181 words

A composition which, based on the weight of the total composition, comprises: (a) from 0-60 weight percent of a polybutylene terephthalate resin; (b) from 0-60 weight percent of a polyethylene terephthalate resin, with the proviso that the sum of the amounts of the polybutylene terephthalate resin and the polyethylene terephthalate resin must be at least 10 weight percent; (c) from 10-30 weight percent of an aromatic polycarbonate resin with the proviso that the amount of (a)+(b) is greater than or equal to the amount of (c); (d) an effective amount of a stabilizer selected from the group consisting of an acid, alkyl, aryl, or mixed phosphite having at least one hydrogen or alkyl group; acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids; (e) from 0-15 weight percent of a styrene-rubber impact modifier; (f) from 29.99-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zirconium oxide and zinc sulfate; and (g) from 0-30 weight percent of a fibrous glass reinforcing filler.

Claim 2

Dependent Claim 181 words

A composition which, based on the weight of the total composition, comprises: (a) from 0-60 weight percent of a polybutylene terephthalate resin; (b) from 0-60 weight percent of a polyethylene terephthalate resin, with the proviso that the sum of the amounts of the polybutylene terephthalate resin and the polyethylene terephthalate resin must be at least 10 weight percent; (c) from 10-30 weight percent of an aromatic polycarbonate resin with the proviso that the amount of (a)+(b) is greater than or equal to the amount of (c); (d) an effective amount of a stabilizer selected from the group consisting of an acid, alkyl, aryl, or mixed phosphite having at least one hydrogen or alkyl group; acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids; (e) from 0-15 weight percent of a styrene-rubber impact modifier; (f) from 29.99-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zirconium oxide and zinc sulfate; and (g) from 0-30 weight percent of a fibrous glass reinforcing filler.

Claim 3

Dependent Claim 181 words

A composition which, based on the weight of the total composition, comprises: (a) from 0-30 weight percent of a polybutalene terephthalate resin; (b) from 0-60 weight percent of a polyethylene terephthalate resin, with the proviso that the sum of the amounts of the polybutylene terephthalate resin and the polyethylene terephthalate resin must be at least 10 weight percent with the proviso that the amount of (a)+(b) is greater than or equal to the amount of (c); (c) from 10-30 weight percent of an aromatic polycarbonate resin; (d) an effective amount of a stabilizer selected from the group consisting of an acid, alkyl, aryl, or mixed phosphite having at least one hydrogen or alkyl group; acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids; (e) from 0-15 weight percent of a styrene-rubber impact modifier; (f) from 30-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zirconium oxide and zinc sulfate; and (g) from 0-30 weight percent of a fibrous glass reinforcing filler.

Claim 4

Dependent Claim 181 words

A composition which, based on the weight of the total composition, comprises: (a) from 0-30 weight percent of a polybutalene terephthalate resin; (b) from 0-60 weight percent of a polyethylene terephthalate resin, with the proviso that the sum of the amounts of the polybutylene terephthalate resin and the polyethylene terephthalate resin must be at least 10 weight percent with the proviso that the amount of (a)+(b) is greater than or equal to the amount of (c); (c) from 10-30 weight percent of an aromatic polycarbonate resin; (d) an effective amount of a stabilizer selected from the group consisting of an acid, alkyl, aryl, or mixed phosphite having at least one hydrogen or alkyl group; acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids; (e) from 0-15 weight percent of a styrene-rubber impact modifier; (f) from 30-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zirconium oxide and zinc sulfate; and (g) from 0-30 weight percent of a fibrous glass reinforcing filler.

Claim 5

Dependent Claim 108 words

A composition as defined in claim 1 wherein the composition comprises: (a) from 7-15 weight percent of polybutylene terephthalate; (b) from 3-10 weight percent of polyethylene terephthalate; (c) from 10-25 weight percent of an aromatic polycarbonate resin; (d) from 0.01-10 weight percent of a stabilizer selected from the group consisting of phosphites,acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids; (e) from 0-15 weight percent of an styrene rubber impact modifier, and (f) from 40-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, zirconium oxide, strontium sulfate and zinc sulfate.

Claim 6

Dependent Claim 15 words

A composition as defined in claim 2 wherein the ratio of (a):(b):(c): is about 2:1:3.

Claim 7

Dependent Claim 20 words

A composition as defined in claim 3 wherein the styrene rubber impact modifier comprises 3-10% by weight of the composition.

Claim 8

Dependent Claim 120 words

A composition as defined in claim 1 wherein the stabilizer is selected from the group consisting of acidic phosphate compounds; phosphites of the formula: ##STR6## wherein R 1 , R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl and aryl with the proviso that at least one of R 1 , R 2 and R 3 is hydrogen or alkyl; poly acid pyrophosphates of the formula: M.sub.x.sup.z H.sub.y P.sub.n O.sub.3n+1 wherein M is a metal, x is a number from 1-12 and y is a number from 2-10; z is a number from 1-5 and the sum of (xz)+y=n+2; phosphorous oxo-acids and phosphate salts of Group IB or Group IIB metals and mixtures thereof.

Claim 9

Dependent Claim 79 words

The composition of claim 1, comprising: (a) from 6-10 weight percent of the polybutylene terephthalate; (b) from 5-10 weight percent of the polyethylene terephthalate; (c) from 12-20 weight percent of the aromatic polycarbonate wherein in said molding composition, the ratio of polybutylene terephthalate to polyethylene terephthalate to aromatic polycarbonate is about 2:1:3; (d) from 0.01-5 weight percent of the stabilizer; (e) from 1-10 weight percent of the styrene-rubber impact modifier; and (f) from 59-72.99 weight percent of barium sulfate.

Claim 10

Dependent Claim 15 words

A composition as defined in claim 6 wherein the stabilizer is an acid phosphate compound.

Claim 11

Dependent Claim 115 words

A composition as defined in claim 6 wherein the stabilizer is selected from the group consisting of phosphites of the formula: ##STR7## wherein R 1 , R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl, and aryl with the proviso that at least one of R 1 , R 2 and R 3 is hydrogen or alkyl; phosphate salts of a Group IB or Group IIB metal and polyacid pyrophosphates of the formula: M.sub.x.sup.z H.sub.y P.sub.n O.sub.3n+1 wherein M is a metal, x is a number from 1-12 and y is a number from 2-10; z is a number from 1-5 and the sum of (xz)+y=n+2; and phosphorous oxo-acids.

Claim 12

Dependent Claim 14 words

A composition as defined in claim 1 wherein the inorganic filler is barium sulfate.

Claim 13

Dependent Claim 14 words

A composition as defined in claim 2 wherein the inorganic filler is barium sulfate.

Claim 14

Dependent Claim 14 words

A composition as defined in claim 3 wherein the inorganic filler is barium sulfate.

Claim 15

Dependent Claim 14 words

A composition as defined in claim 4 wherein the inorganic filler is barium sulfate.

Claim 16

Dependent Claim 14 words

A composition as defined in claim 5 wherein the inorganic filler is barium sulfate.

Claim 17

Dependent Claim 13 words

A composition as defined in claim 1 wherein the stabilizer is phosphorous acid.

Claim 18

Dependent Claim 12 words

A composition as defined in claim 1 wherein the stabilizer is diphenylisodecylphosphite.

Claim 19

Dependent Claim 14 words

A composition as defined in claim 1 wherein the stabilizer is sodium acid pyrophosphate.

Claim 20

Dependent Claim 15 words

A composition as defined in claim 1 wherein the aromatic polycarbonate is a branched polycarbonate.

Claim 21

Dependent Claim 30 words

A composition as defined in claim 17 wherein the branched polycarbonate is made with a branching agent selected from the group consisting of trimellitic trichloride, tris-hydroxyphenyl ethane and isatin bisphenol.

Claim 22

Dependent Claim 18 words

A composition as defined in claim 1 which includes 5-30 weight percent of a fibrous glass reinforcing filler.

Claim 23

Dependent Claim 77 words

A composition which, based on the weight of the total composition, comprises: (a) from 6-10 weight percent of a polybutylene terephthalate resin; (b) from 5-10 weight percent of a polyethylene terephthalate resin; (c) from 12-20weight percent of a branched aromatic polycarbonate resin; (d) from 5-10 weight percent of an ABA block copolymer impact modifier; (e) from 59-71.8 weight percent of barium sulfate; and (f) from 0.2-5 weight percent of mono sodium phosphate, phosphorous acid or diphenylisodecyl phosphate.

Claim 24

Dependent Claim 77 words

A composition which, based on the weight of the total composition, comprises: (a) from 6-10 weight percent of a polybutylene terephthalate resin; (b) from 5-10 weight percent of a polyethylene terephthalate resin; (c) from 12-20weight percent of a branched aromatic polycarbonate resin; (d) from 5-10 weight percent of an ABA block copolymer impact modifier; (e) from 59-71.8 weight percent of barium sulfate; and (f) from 0.2-5 weight percent of mono sodium phosphate, phosphorous acid or diphenylisodecyl phosphate.

Claim 25

Dependent Claim 17 words

A composition as defined in claim 1 wherein the ABA block copolymer is a styrene-ethylene butylene-styrene copolymer.

Claim 26

Dependent Claim 11 words

An article which is formed from the composition of claim 1.

Claim 27

Dependent Claim 11 words

An article which is formed from the composition of claim 2.

Claim 28

Dependent Claim 11 words

An article which is formed from the composition of claim 6.

Claim 29

Dependent Claim 64 words

The composition of claim 18, comprising: (a) from 15-30 weight percent of the polybutylene terephthalate resin; (b) from 5-15 weight percent of the polyethylene terephthalate resin; (c) from 20-30 weight percent of the branched aromatic polycarbonate resin; (d) from 0.05-2 weight percent of the stabilizer; (e) from 0-10 weight percent of the styrene rubber modifier; and (f) from 30-59.95 weight percent of barium sulfate.

Claim 30

Dependent Claim 31 words

A composition as defined in claim 25 wherein the branched polycarbonate resin is made with a branching agent selected from the group consisting of trimellitic trichloride, tris-hydroxyphenyl ethane and isatin bisphenol.

Claim 31

Dependent Claim 11 words

An article which is formed from the composition of claim 25.

Claim 32

Dependent Claim 11 words

An article which is formed from the composition of claim 20.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1998-08-14	1999-02-13	1999-08-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2002-08-14	2003-02-13	2003-08-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2006-08-14	2007-02-13	2007-08-15	$7700.00	Window Closed / Lapsed

High density polyester-polycarbonate molding composition

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