Claims
- 1. A moldable resin composition comprising:(A) a blend of two copolyether ester elastomers having acid end-groups, (A1) and (A2): (A1) with a hardness in the range 45-72 Shore D, in an amount 75-97 wt. % of the blend, and (A2) with a hardness in the range 25-40 Shore D, in an amount 3-25 wt. % of the blend; (B) a copolymer comprising from 94 to 50 wt. % of ethylene, from 5 to 35 wt. % of at least one alkyl or cycloalkyl acrylate or methacrylate, in which the alkyl or cycloalkyl group has from 2 to 10 carbon atoms, and from 1 to 15 wt. % of at least one unsaturated epoxide; at least one of (C) and (D) where: (C) is a copolymer comprising from 88 to 60 wt. % of ethylene, from 11,5 to 40 wt. % of at least one alkyl or cycloalkyl acrylate or methacrylate, in which the alkyl or cycloalkyl group has from 2 to 10 carbon atoms, and from 0.5 to 6 wt. % of at least one anhydride of an unsaturated dicarboxylic acid; (D) is at least one rubbery polymer that can be dispersed finely into the composition by extrusion; (E) a calcium compound capable of reacting with acid end-groups of the copolyether ester elastomers of blend (A); and (F) one or more optional additives; wherein the resin blend (A) is present in an amount of 60-90 wt. % of the composition; copolymer (B) is present in an amount of 6-15 wt. % of the blend A; copolymer (C) when present is in an amount up to 20 wt. % of the composition, and component (D) when present is in an amount up to 20 wt. % of the composition, providing the sum of (C) and (D) is at least 2 wt. % of the composition; the calcium compound (E) is in an amount such as to provide up to 2 wt. % elemental calcium in the composition; and the optional additive(s) (F) when present is/are in an amount up to 20 wt. % of the composition.
- 2. The composition of claim 1 wherein the copolyether ester elastomers (A1) and (A2) consist essentially of a multiplicity of recurring long chain ester units and short chain ester units joined head-to-tail through ester linkages, said long chain ester units being represented by the formula and said short chain ester units being represented by the formula where G is a divalent radical remaining after removal of terminal hydroxyl groups from a poly(alkylene oxide) glycol having a molecular weight of about 400-6000 and a carbon-to-oxygen ratio of about 2.0-4.3; R is a divalent radical remaining after removal of carboxyl groups from a dicarboxylic acid having a molecular weight less than about 300 and D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 250; provided said short chain ester units amount to about 15-95% by weight of said copolyether ester.
- 3. The composition of claim 1, wherein blend (A) contains copolyether ester elastomers (A1) in an amount 84-94 wt. % and (A2) in an amount 6-16 wt. % of the blend.
- 4. The composition of claim 1, wherein copolymer (B) and copolymer (C), when present, comprise alkyl acrylates and methacrylates selected from: methyl methacrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate and 2-ethyl-hexyl acrylate.
- 5. The composition of claim 1, wherein copolymer (B) comprises unsaturated epoxides selected from: aliphatic glycidyl esters and ethers, and alicylic glycidyl esters and ethers.
- 6. The composition of claim 1, wherein copolymer (C) comprises anhydrides of an unsaturated dicarboxylic acid selected from maleic anhydride, itaconic anhydride, citraconic anhydride and tetrahydrophthalic anhydride.
- 7. The composition of claim 1, wherein the rubbery polymer (D) is at least one of an acrylate terpolymer rubber and a butyl-acrylate/PMMA multiphase composite interpolymer.
- 8. The composition of claim 1, wherein the calcium compound (E) is calcium oxide or calcium hydroxide in an amount up to 2 wt. % of elemental calcium.
- 9. The composition of claim 1, wherein the optional additives (F) include a compound capable of accelerating the reaction between the epoxy groups present in the copolymer (B) and the acid end-groups of the copolyether ester elastomers (A1) and (A2).
- 10. A shaped article that includes the composition of claim 1.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. application Ser. No. 09/648,979, filed Aug. 28, 2000, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (5)
Number |
Date |
Country |
2039132 |
Jul 1992 |
CA |
577 508 |
Jan 1994 |
EP |
0904320 |
Aug 2001 |
EP |
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Continuations (1)
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Number |
Date |
Country |
Parent |
09/648979 |
Aug 2000 |
US |
Child |
10/198425 |
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US |