CA2035345A1 - Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom - Google Patents
Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefromInfo
- Publication number
- CA2035345A1 CA2035345A1 CA 2035345 CA2035345A CA2035345A1 CA 2035345 A1 CA2035345 A1 CA 2035345A1 CA 2035345 CA2035345 CA 2035345 CA 2035345 A CA2035345 A CA 2035345A CA 2035345 A1 CA2035345 A1 CA 2035345A1
- Authority
- CA
- Canada
- Prior art keywords
- polymer mixture
- polyester
- weight
- parts
- thermoplastic elastomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920002959 polymer blend Polymers 0.000 title claims abstract description 42
- 229920000728 polyester Polymers 0.000 title claims abstract description 38
- 239000004417 polycarbonate Substances 0.000 title claims abstract description 27
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 26
- 125000003118 aryl group Chemical group 0.000 title claims abstract description 24
- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 15
- 150000002148 esters Chemical class 0.000 claims abstract description 21
- 239000004697 Polyetherimide Substances 0.000 claims abstract description 9
- 229920001601 polyetherimide Polymers 0.000 claims abstract description 9
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- -1 poly(oxyalkylene) Polymers 0.000 claims description 14
- KKEYFWRCBNTPAC-UHFFFAOYSA-N benzene-dicarboxylic acid Natural products OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 6
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 150000002009 diols Chemical class 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 150000004985 diamines Chemical class 0.000 claims description 3
- 229920006149 polyester-amide block copolymer Polymers 0.000 claims description 3
- 150000003627 tricarboxylic acid derivatives Chemical class 0.000 claims description 3
- 230000001588 bifunctional effect Effects 0.000 claims description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 description 11
- 239000000203 mixture Substances 0.000 description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 239000000470 constituent Substances 0.000 description 6
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 4
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- 229930185605 Bisphenol Natural products 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 229920001634 Copolyester Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- YZPOQCQXOSEMAZ-UHFFFAOYSA-N pbt2 Chemical compound ClC1=CC(Cl)=C(O)C2=NC(CN(C)C)=CC=C21 YZPOQCQXOSEMAZ-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
8-CB-10,488 ABSTRACT:
The invention relates to polymer mixtures which comprise an aromatic polycarbonate, a polyester, and a thermoplastic elastomer. The polymer mixture comprises a polyester-ester urethane or a polyether imide ester as a thermoplastic elastomer. The polymer mixtures according to the invention have good flow pro-perties.
The invention relates to polymer mixtures which comprise an aromatic polycarbonate, a polyester, and a thermoplastic elastomer. The polymer mixture comprises a polyester-ester urethane or a polyether imide ester as a thermoplastic elastomer. The polymer mixtures according to the invention have good flow pro-perties.
Description
~ ~ 3 ~
8-C~-10,488 Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom.
The invention relates to a polymer mixture which comprises an aromatic polycarbonate (A), a polyester built up entirely or substantially from units derived from an alkanediol and a benzene dicarboxylic acid ( B ), and a thermoplastic elastomer (C).
Polymer mixtures which comprise a copolyether ester, a polycarbonate and optionally a poly~alkene terephthalate) are disclosed in EP-A-0150454. The known polymer mixture comprises 5-100 parts by weight of poly~
carbonate per 100 parts by weight of copolyether ester.
When a polyester is used, the quantity thereof is pre-ferably at most 70% by weight based on the combined weight of the polycarbonate and the polyester. According to this prior art the following properties of the polyether are improved by the addition of a polycar-bonate and/or a polyester to polyether esters: the bending strength, the tensile strength and the processa-bility, while maintaining the impact strength and the elongation. ~`
Polymer mixtures which comprise a mixture ofpolybutylene terephthalate and polyethylene terephthalate 35 and clay treated w1th silane, acicular calcium metaslli- :~
;~
:
:
,: ~
~ .. ,~ .
., 2~3 ~L~
8-CB-10,488 -2-1 cate; a combination o~ a seymented copolyester and an aromatic polycarbonate or novaculitP are described in US-A-~, 203, 887 . By adding the last-mentioned consti-tuents to the polyester mixture, this can more easily be processed. A polyether ester block copolymer is used as a segmented copolyester.
EP-A-0,192,065 describes polymer mixtures which comprise 30-90% by weight of polycarbonate, 4-45~ by weight of a polyester ether elastomer and 2-~0% by w~ight of a polyester~ Moreover, the known polymer mix-tures may comprise a rubber-like elastomer. The known mixtures have a good bending modulus, a good flow and have chemical resistance.
Polymer mixtures which comprise a polyether imide ester elastomer, a polyester, a rubber-like elastomer and a polycarbonate are described in the non--prepublished United States Patent Application serial no. 138,~85.
The invention provides polymer mixtures which comprise an aromatic polycarbonate (A) and a polyester (B). It has been found that by the addition of com-paratively small quantities of cer~ain thermoplasticelastomers (C) an improvement of the flow properties can be obtained, while the remaining good mechanical pro-perties and the chemical resistance are maintained.
The polymer mixture according to the invention is characterised in that the polymer mixture comprises a polyester-ester urethane or a polyether imide ester as a thermoplastic elastomer (C).
The polymer mixture according to the invention is preferably composed so that it comprises 40-80 parts . .; ~ . . ~ , :
~ '3 8-CB-10,488 -3-1 by weight of aromatic polycarbonate (A), 10-50 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic polymer (C).
Within the above indicated preferred range, two even more preferable ranges are present:
- 65-75 parts by weight of aromatic polycarbon~te (A), 10-20 parts by weight of polyester (B), and 1~10 parts by weight of thermoplastic polymer (C).
- 45-55 parts by weight of aromatic polycarbonate (A), 30-40 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic elastomer (c).
All the above-mentioned quantities are calculated per 100 parts by weight of A + B ~ C.
As a polyester-ester urethane is preferably used a block copolymer which is built up from polyester--ester units which are bonded by means of groups of the formula Rl[NHC(0~]p, wherein Rl is a polyfunctional group having at most 30 carbon atoms and ~ has a value of 2 or 3, and in which the polyester-ester units are built up from blocks having a number of ester units of the formula -OGOC(0~2C(0) - and blocks having a number of ester units which are capable of forming a bifunc-tional polyester or polyester amide having a melting- :
-point lower than 100 C, which blocks are bonded together by means of ester bonds.
:,:
As a polyether imide ester is preferably used a block copolymer obtained by reaction of a diol having a low molecular weight, a:dicarboxylic acid, a :
: ' ~3~
8-CB-10,488 -4-l poly(oxyalkylene)diamine and a tricarboxylic acid or a derivative thereof.
The polymer mixture according to the invention may moreover comprise one or more conventionally used additives. In many cases it is to be preferred to use in the polymer mixture according to the invention an agent to improve the impact strength.
The invention also relates to articles formed from the polymer mixture according to the invention.
The polymer mixture according to the invention comprises at any rate the following constituents:
A. an aromatic polycarbonate, B. a polyester built up entirely or substantially from units derived from an alkanediol and a benzene dicar-boxylic acid, and ~0 C. a polyester-ester urethane or a polyether imide ester.
A. Aromatic polycarbonate Aromatic polycarbonates are polymers known per se. They are generally prepared by reacting a dihydric phenol compound with a caxbonate precursor, for example, phosgene, a halogen formiate or a carbonate ester.
Aromatic polycarbonates are polymers which comprise unlts of the formula Il --t O - A - O - C )--wherein A is a bivalent aromatic radical which is derived from the dihydric phenol used in the preparation ; ~ ' ' 33~
8-C~-10,488 -5-1 of the polymer. Mononuclear or polynuclear aromatic com-pounds which comprise two hydroxy radicals which are each directly bonded to a carbon atom cf an aromatic nucleus may be used as dihydric phenols in the prepara-tion of the aromatic polycarbonates.
The known branched polycarbonates as described, for example, in US-A-4,001,184 are also suitable.
Suitable aromatic polycarbonates are also the so-called polyester carbonates which are obtained by carrying out the polymer~sation reaction in the presence of an ester precursor, for example, a difunctional car-boxylic acid, for example, terephthalic acid or anester-forming derivative thereof. These polyester car-bonates have ester compounds and carbonate compounds in the polymeric chain. Polyester carbonates are described, for example, in US-A-3,169,121.
B. Polyester The invention relates to polymer mixtures which comprise a polyester having units derived from an alkanediol and a benzene dicarboxylic acid. The polyester may comprise units derived from one or more alkanediol compounds. The polyester may also comprise units derived from one or more benzene dicarboxylic acids. In addition to the alkanediol the polyester may comprise units derived from one or more other diol com-pounds or polyol compounds.
The polyester generally comprises an excess ofunits derived from an alkanediol with respect to the optionally present units derived from other diol com-pounds or polyol compounds.Suitable alkanediol compounds are, for example, ethane-. ~ . ' ' '::
: ~. , '' ' '; :' , -~ 2~3~
8-CB-10,488 -6-1 diol or butane-1,4-diol. In addition to units derived from benzene dicarboxylic acids the polyester may also comprise units derived from other dicarboxylic acids or polycarboxylic acids. However, the greater part of the units derived from acids is derived from an aromatic dicarboxylic acid. Suitable benzene dicarboxylic acids are terephthalic acid and isophthalic acid.
A polyester having more than 70 mol% of units derived from terephthalic acid and butane-1,4-diol is preferably used as a polyester. It is also possible to use two or more different polyesters.
C. Polyester-ester urethane or polyether im1de ester Polyester-ester urethanes are known per se.
They are usually bullt up from polyester-ester units which are bonded by means of groups of the formula Rl[NHC](O)p, wherein Rl is a polyfunctional group having at most 30 carbon atoms and ~ has the value 2 or 3, and in which the polyester-ester units are built up from blocks having a number of ester units of the formula -OGOC(0)R2C(0)- and blocks having a number of ester units which are capable of forming a bifunctionai polyester or polyester amide having a melting-point lower than 100 C, which blocks are bonded together by means of ester bonds, at least 80 mol% of the R2 groups being 1,4-phenylene radicals and at least 80 mol% of the G-groups being a tetra methylene group.
i.
Such polymers and their modes of preperation are described, for example, in EP-A-0102115, US-A-4,186,257 and US-A-4,228,249.
Polyether imide esters are also known per se.
They are usually obtained by reaction of a diol having a low molecular weight, a dicarboxylic acid, a poly(oxyal-kylene) diamine and a tricarboxylic acid or a derivative :
. , . ~ ,, : , -. ~ . . . .
- - . , . .: .,. ::, ~, ., . , : : . . . .
~3~
8-CB-10,488 -7-1 thereof. Such polymers are described, for example, in US-A-4,~44,734, US-A-4,556,705 and US-A-4,556,688.
In addition to the constituents mentioned hereinbefore the polymer mixture according to the inven-tion may also comprise conventionally used additives.
Suitable additives are pigments and dyes, reinforcing fibres, stabilisers, transesterification inhibitors, flame retardants, mould release agents, etc. The polymer mixture according to the invention preferably comprises an agent to improve the impact strength.
The polymer mlxture according to the inven-tion can be obtained accordlng to any method conven-tionally used for the preperation of polymer mixtures.The polymer mixtures according to the invention are pre-ferably prepared by compounding the individual consti-tuents in an extruder.
EXAMPLES
The following constituents were used in the examples:
PC-l: an aromatic polycarbonate derived from bisphe-nol A and phosgene having an intrinsic visco-sity of 49 dl/g measured in methylene chloride at 25C.
PC-2: an aromatic polycarbonate derived from bisphe-nol A and phosgene having an intrinsic visco-sity of 47 dl/g measured in methyl~ne chloride a~ 25C.
PC-3: an aromatic polycarbonate derived from bisphe-nol A and phosgene having an intrinsic visco-sity of 53 dl/g measured in methylene chloride at 25C. -.
. . ~
~3 ~3~
8-CB-10, 488 -8-1 PBT-l: a polyester derived from butanedlol and terephthalic acld having an intrinsic visco-sity of O . 86 dl/g measured in a 60/40 mixturP
of phenol/tetrachloroethane at 25~C.
PBT-2: a polyester derived from butanediol and terephthalic acid having an intrinsic visco-sity of 1-18 dl/g measured in a 60/40 mixture of phenol/tetrachloroethane at 25O C.
TPE-l: a polyester-ester urethane commercially available as ARNITEL~ UM550.
TPE-2: a polyether imide ester co~mercially available from General Electric as LOMOD~ J10.
IM: an agent to improve the impact strength based on a core-shell graft polymer having a rubber--like core built up substantially from a buta-diene rubber and a hard shell (in powder form).
ST-l: a first mixture of stabilisers~
ST-2: a second mixture of stabilisers.
PE: a polyethene.
20 Pig: a mixture of pigments.
K: a polymer based on (meth)acrylates.
EXL: a similar agent to IM to improve the impact strength, (i~ pellet form).
The constituents mentioned hereinbefore were compounded in the quantities as indicated hereinafter in a single-blade extruder, ad~usted at an average tem-perature of approximately 250 C, and processed to pellets. `
The following properties of the resulting polymer mixtures were determined: the melt viscosity at 280 C and at various shearing rates (according to DIN 54811), the melt viscosity index at 265 C, under a load of 12 N ~according to ~STM 123~), the Izod notched impact strength at varlous temperatures (according to ~: . ,, . : : , ~ . . : . , .
8-CB-10,488 -9-1 ASTM D256) and the Vicat B value (according to ASTMD
1525).
r The results are recorded in the table hereinafter.
/
~ -r .. ~
-- : . - .. : ~ .
~: . ~ . .
:
8-CB-10, 480 -10-H ~J~3 H ~r r ~n 0 o ~ ~ ~ ~ a~
. II . I I . I I . I r ~ ~ r o r H ~ r` r-- U) ~ 1''7 '1 0 ~ ~ ~D
, - U~
U~
`D ~D 1` q~ ~ ~ a~
~`
~D ~1 ~ U~ O ~ ~ ~ O
H ~ I ~ 0 H Ul cn H . I I I I ~ I I Cl:l ~ r~ li~ O
0 :
~D ~ O ~D 1` ~ U~ O
m I I ~ I I I I I . I I . I f~ t~ ~ r. r ~n N
~ ~ .
: ' ~ Ir~Ir~ O N 11~ ~1 ~1 --I ~ U) ~ ~1 _~ ,~ ; ' . 3 v~
o U~ o ~ ~ ~ o U U-- o z ~ ~ u ~ a) ~ u u ~ ~ _ ~ ~ ~ Q~
a) ~ -1 o ~ ~ U O u C~ m ~ ~ ~ > _u~ ~ o ~ C ~ ~
~r~ ~ 1 ~ 1 ~ o u~ I r m x ~ c o o o o ~
~1 ~ h H ~`1 tr I I I I r~l ~3 ~ J~ H ~~ Ei O O O O O IU
m (~1 11~ I I I E~ E~ li3 Cli I I ~ ~Jl O r~ ~ O h O ~ N trl ~p U
~ x ~C~ U U m m ~ h E~ 1 ~ O N J_~ 0 ~ I I I IE-1:'1 ~ Cl~ D~ E- E~ H tn U~ ~ ~ ~ H r-~ H U~ h /15 0 If~ o ul o In o N N ~
.. .
:' ~
' ~ . .
' ' .
8-CB-10,488 -11-1 It may be seen from the results recorded in the table hereinbefore that the addition of a com-paratively small quantity (5 parts by weight) of a ther-moplastic polymer TPE-l or TPE-2 leads to an improvement of the flow properties.
, : :
;
- . ,
8-C~-10,488 Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom.
The invention relates to a polymer mixture which comprises an aromatic polycarbonate (A), a polyester built up entirely or substantially from units derived from an alkanediol and a benzene dicarboxylic acid ( B ), and a thermoplastic elastomer (C).
Polymer mixtures which comprise a copolyether ester, a polycarbonate and optionally a poly~alkene terephthalate) are disclosed in EP-A-0150454. The known polymer mixture comprises 5-100 parts by weight of poly~
carbonate per 100 parts by weight of copolyether ester.
When a polyester is used, the quantity thereof is pre-ferably at most 70% by weight based on the combined weight of the polycarbonate and the polyester. According to this prior art the following properties of the polyether are improved by the addition of a polycar-bonate and/or a polyester to polyether esters: the bending strength, the tensile strength and the processa-bility, while maintaining the impact strength and the elongation. ~`
Polymer mixtures which comprise a mixture ofpolybutylene terephthalate and polyethylene terephthalate 35 and clay treated w1th silane, acicular calcium metaslli- :~
;~
:
:
,: ~
~ .. ,~ .
., 2~3 ~L~
8-CB-10,488 -2-1 cate; a combination o~ a seymented copolyester and an aromatic polycarbonate or novaculitP are described in US-A-~, 203, 887 . By adding the last-mentioned consti-tuents to the polyester mixture, this can more easily be processed. A polyether ester block copolymer is used as a segmented copolyester.
EP-A-0,192,065 describes polymer mixtures which comprise 30-90% by weight of polycarbonate, 4-45~ by weight of a polyester ether elastomer and 2-~0% by w~ight of a polyester~ Moreover, the known polymer mix-tures may comprise a rubber-like elastomer. The known mixtures have a good bending modulus, a good flow and have chemical resistance.
Polymer mixtures which comprise a polyether imide ester elastomer, a polyester, a rubber-like elastomer and a polycarbonate are described in the non--prepublished United States Patent Application serial no. 138,~85.
The invention provides polymer mixtures which comprise an aromatic polycarbonate (A) and a polyester (B). It has been found that by the addition of com-paratively small quantities of cer~ain thermoplasticelastomers (C) an improvement of the flow properties can be obtained, while the remaining good mechanical pro-perties and the chemical resistance are maintained.
The polymer mixture according to the invention is characterised in that the polymer mixture comprises a polyester-ester urethane or a polyether imide ester as a thermoplastic elastomer (C).
The polymer mixture according to the invention is preferably composed so that it comprises 40-80 parts . .; ~ . . ~ , :
~ '3 8-CB-10,488 -3-1 by weight of aromatic polycarbonate (A), 10-50 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic polymer (C).
Within the above indicated preferred range, two even more preferable ranges are present:
- 65-75 parts by weight of aromatic polycarbon~te (A), 10-20 parts by weight of polyester (B), and 1~10 parts by weight of thermoplastic polymer (C).
- 45-55 parts by weight of aromatic polycarbonate (A), 30-40 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic elastomer (c).
All the above-mentioned quantities are calculated per 100 parts by weight of A + B ~ C.
As a polyester-ester urethane is preferably used a block copolymer which is built up from polyester--ester units which are bonded by means of groups of the formula Rl[NHC(0~]p, wherein Rl is a polyfunctional group having at most 30 carbon atoms and ~ has a value of 2 or 3, and in which the polyester-ester units are built up from blocks having a number of ester units of the formula -OGOC(0~2C(0) - and blocks having a number of ester units which are capable of forming a bifunc-tional polyester or polyester amide having a melting- :
-point lower than 100 C, which blocks are bonded together by means of ester bonds.
:,:
As a polyether imide ester is preferably used a block copolymer obtained by reaction of a diol having a low molecular weight, a:dicarboxylic acid, a :
: ' ~3~
8-CB-10,488 -4-l poly(oxyalkylene)diamine and a tricarboxylic acid or a derivative thereof.
The polymer mixture according to the invention may moreover comprise one or more conventionally used additives. In many cases it is to be preferred to use in the polymer mixture according to the invention an agent to improve the impact strength.
The invention also relates to articles formed from the polymer mixture according to the invention.
The polymer mixture according to the invention comprises at any rate the following constituents:
A. an aromatic polycarbonate, B. a polyester built up entirely or substantially from units derived from an alkanediol and a benzene dicar-boxylic acid, and ~0 C. a polyester-ester urethane or a polyether imide ester.
A. Aromatic polycarbonate Aromatic polycarbonates are polymers known per se. They are generally prepared by reacting a dihydric phenol compound with a caxbonate precursor, for example, phosgene, a halogen formiate or a carbonate ester.
Aromatic polycarbonates are polymers which comprise unlts of the formula Il --t O - A - O - C )--wherein A is a bivalent aromatic radical which is derived from the dihydric phenol used in the preparation ; ~ ' ' 33~
8-C~-10,488 -5-1 of the polymer. Mononuclear or polynuclear aromatic com-pounds which comprise two hydroxy radicals which are each directly bonded to a carbon atom cf an aromatic nucleus may be used as dihydric phenols in the prepara-tion of the aromatic polycarbonates.
The known branched polycarbonates as described, for example, in US-A-4,001,184 are also suitable.
Suitable aromatic polycarbonates are also the so-called polyester carbonates which are obtained by carrying out the polymer~sation reaction in the presence of an ester precursor, for example, a difunctional car-boxylic acid, for example, terephthalic acid or anester-forming derivative thereof. These polyester car-bonates have ester compounds and carbonate compounds in the polymeric chain. Polyester carbonates are described, for example, in US-A-3,169,121.
B. Polyester The invention relates to polymer mixtures which comprise a polyester having units derived from an alkanediol and a benzene dicarboxylic acid. The polyester may comprise units derived from one or more alkanediol compounds. The polyester may also comprise units derived from one or more benzene dicarboxylic acids. In addition to the alkanediol the polyester may comprise units derived from one or more other diol com-pounds or polyol compounds.
The polyester generally comprises an excess ofunits derived from an alkanediol with respect to the optionally present units derived from other diol com-pounds or polyol compounds.Suitable alkanediol compounds are, for example, ethane-. ~ . ' ' '::
: ~. , '' ' '; :' , -~ 2~3~
8-CB-10,488 -6-1 diol or butane-1,4-diol. In addition to units derived from benzene dicarboxylic acids the polyester may also comprise units derived from other dicarboxylic acids or polycarboxylic acids. However, the greater part of the units derived from acids is derived from an aromatic dicarboxylic acid. Suitable benzene dicarboxylic acids are terephthalic acid and isophthalic acid.
A polyester having more than 70 mol% of units derived from terephthalic acid and butane-1,4-diol is preferably used as a polyester. It is also possible to use two or more different polyesters.
C. Polyester-ester urethane or polyether im1de ester Polyester-ester urethanes are known per se.
They are usually bullt up from polyester-ester units which are bonded by means of groups of the formula Rl[NHC](O)p, wherein Rl is a polyfunctional group having at most 30 carbon atoms and ~ has the value 2 or 3, and in which the polyester-ester units are built up from blocks having a number of ester units of the formula -OGOC(0)R2C(0)- and blocks having a number of ester units which are capable of forming a bifunctionai polyester or polyester amide having a melting-point lower than 100 C, which blocks are bonded together by means of ester bonds, at least 80 mol% of the R2 groups being 1,4-phenylene radicals and at least 80 mol% of the G-groups being a tetra methylene group.
i.
Such polymers and their modes of preperation are described, for example, in EP-A-0102115, US-A-4,186,257 and US-A-4,228,249.
Polyether imide esters are also known per se.
They are usually obtained by reaction of a diol having a low molecular weight, a dicarboxylic acid, a poly(oxyal-kylene) diamine and a tricarboxylic acid or a derivative :
. , . ~ ,, : , -. ~ . . . .
- - . , . .: .,. ::, ~, ., . , : : . . . .
~3~
8-CB-10,488 -7-1 thereof. Such polymers are described, for example, in US-A-4,~44,734, US-A-4,556,705 and US-A-4,556,688.
In addition to the constituents mentioned hereinbefore the polymer mixture according to the inven-tion may also comprise conventionally used additives.
Suitable additives are pigments and dyes, reinforcing fibres, stabilisers, transesterification inhibitors, flame retardants, mould release agents, etc. The polymer mixture according to the invention preferably comprises an agent to improve the impact strength.
The polymer mlxture according to the inven-tion can be obtained accordlng to any method conven-tionally used for the preperation of polymer mixtures.The polymer mixtures according to the invention are pre-ferably prepared by compounding the individual consti-tuents in an extruder.
EXAMPLES
The following constituents were used in the examples:
PC-l: an aromatic polycarbonate derived from bisphe-nol A and phosgene having an intrinsic visco-sity of 49 dl/g measured in methylene chloride at 25C.
PC-2: an aromatic polycarbonate derived from bisphe-nol A and phosgene having an intrinsic visco-sity of 47 dl/g measured in methyl~ne chloride a~ 25C.
PC-3: an aromatic polycarbonate derived from bisphe-nol A and phosgene having an intrinsic visco-sity of 53 dl/g measured in methylene chloride at 25C. -.
. . ~
~3 ~3~
8-CB-10, 488 -8-1 PBT-l: a polyester derived from butanedlol and terephthalic acld having an intrinsic visco-sity of O . 86 dl/g measured in a 60/40 mixturP
of phenol/tetrachloroethane at 25~C.
PBT-2: a polyester derived from butanediol and terephthalic acid having an intrinsic visco-sity of 1-18 dl/g measured in a 60/40 mixture of phenol/tetrachloroethane at 25O C.
TPE-l: a polyester-ester urethane commercially available as ARNITEL~ UM550.
TPE-2: a polyether imide ester co~mercially available from General Electric as LOMOD~ J10.
IM: an agent to improve the impact strength based on a core-shell graft polymer having a rubber--like core built up substantially from a buta-diene rubber and a hard shell (in powder form).
ST-l: a first mixture of stabilisers~
ST-2: a second mixture of stabilisers.
PE: a polyethene.
20 Pig: a mixture of pigments.
K: a polymer based on (meth)acrylates.
EXL: a similar agent to IM to improve the impact strength, (i~ pellet form).
The constituents mentioned hereinbefore were compounded in the quantities as indicated hereinafter in a single-blade extruder, ad~usted at an average tem-perature of approximately 250 C, and processed to pellets. `
The following properties of the resulting polymer mixtures were determined: the melt viscosity at 280 C and at various shearing rates (according to DIN 54811), the melt viscosity index at 265 C, under a load of 12 N ~according to ~STM 123~), the Izod notched impact strength at varlous temperatures (according to ~: . ,, . : : , ~ . . : . , .
8-CB-10,488 -9-1 ASTM D256) and the Vicat B value (according to ASTMD
1525).
r The results are recorded in the table hereinafter.
/
~ -r .. ~
-- : . - .. : ~ .
~: . ~ . .
:
8-CB-10, 480 -10-H ~J~3 H ~r r ~n 0 o ~ ~ ~ ~ a~
. II . I I . I I . I r ~ ~ r o r H ~ r` r-- U) ~ 1''7 '1 0 ~ ~ ~D
, - U~
U~
`D ~D 1` q~ ~ ~ a~
~`
~D ~1 ~ U~ O ~ ~ ~ O
H ~ I ~ 0 H Ul cn H . I I I I ~ I I Cl:l ~ r~ li~ O
0 :
~D ~ O ~D 1` ~ U~ O
m I I ~ I I I I I . I I . I f~ t~ ~ r. r ~n N
~ ~ .
: ' ~ Ir~Ir~ O N 11~ ~1 ~1 --I ~ U) ~ ~1 _~ ,~ ; ' . 3 v~
o U~ o ~ ~ ~ o U U-- o z ~ ~ u ~ a) ~ u u ~ ~ _ ~ ~ ~ Q~
a) ~ -1 o ~ ~ U O u C~ m ~ ~ ~ > _u~ ~ o ~ C ~ ~
~r~ ~ 1 ~ 1 ~ o u~ I r m x ~ c o o o o ~
~1 ~ h H ~`1 tr I I I I r~l ~3 ~ J~ H ~~ Ei O O O O O IU
m (~1 11~ I I I E~ E~ li3 Cli I I ~ ~Jl O r~ ~ O h O ~ N trl ~p U
~ x ~C~ U U m m ~ h E~ 1 ~ O N J_~ 0 ~ I I I IE-1:'1 ~ Cl~ D~ E- E~ H tn U~ ~ ~ ~ H r-~ H U~ h /15 0 If~ o ul o In o N N ~
.. .
:' ~
' ~ . .
' ' .
8-CB-10,488 -11-1 It may be seen from the results recorded in the table hereinbefore that the addition of a com-paratively small quantity (5 parts by weight) of a ther-moplastic polymer TPE-l or TPE-2 leads to an improvement of the flow properties.
, : :
;
- . ,
Claims (10)
1. A polymer mixture which comprises an aromatic polycarbonate (A), a polyester built up entirely or substantially from units derived from an alkanediol and a benzene dicarboxylic acid (B), and a thermoplastic elastomer (C), characterised in that the polymer mixture comprises a polyester-ester urethane or a polyether imide ester as a thermoplastic elastomer (C).
2. A polymer mixture as claimed in Claim 1, characterised in that the polymer mixture comprises 40-80 parts by weight of aromatic polycarbonate (A), 10-50 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic elastomer (C), calculated per 100 parts by weight of A + B + C.
3. A polymer mixture as claimed in Claim 1, characterised in that the polymer mixture comprises 65-75 parts by weight of aromatic polycarbonate (A), 10-20 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic elastomer (C), calculated per 100 parts by weight of A + B + C.
4. A polymer mixture as claimed in Claim 1, characterised in that the polymer mixture comprises 45-55 parts by weight of aromatic polycarbonate (A), 30-40 parts by weight of polyester (B), and 1-10 parts by weight of thermoplastic elastomer (C), calculated per 100 parts by weight of A + B + C.
5. A polymer mixture as claimed in Claim 1, characterised in that the polymer mixture comprises as a thermoplastic elastomer (C) a polyester-ester urethane which is built up from polyester-ester units which are bonded by means of groups of the formula R1[NHC(0)]p, wherein R1 is a polyfunctional group having at most 30 carbon atoms and p has a value of 2 or 3, and in which the polyester-ester units are built up from blocks having a number of ester units of 8-CB-10,488 -13-the formula -OGOC(O)R2C(O)- and blocks having a number of ester units which are capable of forming a bifunc-tional polyester or polyester amide having a melting--point lower than 100° C, which blocks are bonded together by ester bonds, at least 80 mol% of the R2-groups being 1,4-phenylene radicals and at least 80 mol% of the G-groups being a tetra methylene group.
6. A polymer mixture as claimed in Claim 1, characterised in that the polymer mixture comprises as a thermoplastic elastomer (C) a polyether imide ester obtained by reaction of a diol having a low molecular weight, a dicarboxylic acid, a poly(oxyalkylene)diamine and a tricarboxylic acid or a derivative thereof.
7. A polymer mixture as claimed in Claim 1, characterised in that the polymer mixture comprises in addition one or more conventionally used additives.
8. A polymer mixture as claimed in Claim 7, characterised in that the polymer mixture comprises in addition an agent to improve the impact strength.
9. Articles formed from the polymer mixture as claimed in Claim 1.
10. The invention as defined in any of the preceding claims including any further features of novelty disclosed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2035345 CA2035345A1 (en) | 1991-01-31 | 1991-01-31 | Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2035345 CA2035345A1 (en) | 1991-01-31 | 1991-01-31 | Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2035345A1 true CA2035345A1 (en) | 1992-08-01 |
Family
ID=4146924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2035345 Abandoned CA2035345A1 (en) | 1991-01-31 | 1991-01-31 | Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2035345A1 (en) |
-
1991
- 1991-01-31 CA CA 2035345 patent/CA2035345A1/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0015146B1 (en) | Polyester compositions and processes for moulding them | |
| EP0357896A1 (en) | PBT with improved tracking resistance | |
| CA2313192A1 (en) | Stabilized molding compounds comprised of biologically degradable materials | |
| CA2030637C (en) | Polymer mixture comprising polybutylene terephthalate and thermoplastic elastomer; articles formed therefrom | |
| US5446109A (en) | Polyamide/aliphatic polyester block copolymer, process for the production thereof, and blend containing the same | |
| US5541244A (en) | Polymer mixture and articles formed therefrom | |
| US4184997A (en) | Copolyether-esters as additives for fiber-reinforced polyethylene terephthalate | |
| US5321099A (en) | Blends of semi-crystalline polyamides and polyesteramides | |
| EP0015145B1 (en) | Polyester compositions and processes for moulding them | |
| US5202385A (en) | Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, article formed therefrom | |
| US5055531A (en) | Process for the preparation of polyester/polycarbonate copolymers | |
| EP0237306A2 (en) | Semi-rigid thermoplastic polyester compositions | |
| EP0249134B1 (en) | Polyethylene terephthalate resin composition | |
| US5691412A (en) | Polyamide/aliphatic polyester block copolymer, process for the production thereof, and blend containing the same | |
| JPH05302022A (en) | Polyester-polyester block copolymer composition | |
| EP0374313B2 (en) | Polyester resin filled with low-adhesive glass fibre | |
| US5298544A (en) | Non-halogen flame retardant thermoplastic composition | |
| CA2035345A1 (en) | Polymer mixture having aromatic polycarbonate, polyester and thermoplastic elastomer, articles formed therefrom | |
| USH766H (en) | Polyarylate compositions | |
| CA1124914A (en) | Thermoplastic molding compositions | |
| JPH0465103B2 (en) | ||
| EP0480524A2 (en) | Polymer mixture comprising polybutylene terephtalate, thermoplastic elastomer, and a brominated polystyrene; articles formed therefrom | |
| US5994451A (en) | Polytrimethylene terephthalate composition | |
| GB1569229A (en) | Block copolyesters of polybutylene terephthalate | |
| GB2039510A (en) | Modified polyester compositions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |