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US 5,496,880 AGranted
Polymer mixtures and articles formed therefrom
AssigneeGeneral Electric Company
InventorsJan W. Heuseveldt, Johannes van Helmond, Hendrikus H. T. M. Ketels
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Abstract
The invention relates to polymer mixtures comprising a first polyalkylene phthalate, for example, polybutylene terephthalate, and a second polyalkylene phthalate and/or a thermoplastic elastomer and phosphorus compounds. It has been found that, with regard to the crystallisation behaviour, the addition of certain nucleating agents (namely talcum or carbon black) show a synergistic effect with certain phosporus compounds.
Claims7
A polymer mixture comprising
- A) a first polyalkylene phthalate which comprises more than 35 mol% of units derived from 1,4-butanediol and which comprises more than 35 mol% of units derived from terephthalic acid;
- and
- B) a component selected from the group consisting of:
- B1 a second polyalkylene phthalate which comprises less than 15 mol% of units derived from 1,4-butanediol;
- or
- B2 a thermoplastic elastomer selected from a polyether ester block copolymer, a polyester ester urethane and a polyether imide ester or mixture thereof;
- or
- B3 a mixture of B1 and B2, and
- C) a transesterification inhibitor selected from an inorganic pyrophosphate;
- an inorganic phosphate having at least two acid hydrogen atoms or an inorganic orthophosphate or a mixture thereof wherein said transesterification inhibitor is present in an amount from 0.01 to 2 parts by weight per 100 parts by weight A and B, and
- D) a nucleating agent selected from the group consisting essentially of talcum;
- carbon black or a mixture thereof wherein said nucleating agent is present in an amount from 0.05 to 5 parts by weight per 100 parts by weight A and B.
9 more elements
A polymer mixture comprising
- A) polybutylene terephthalate;
- and
- B) a polyether ester block copolymer, and
- C) a transesterification inhibitor selected from an inorganic pyrophosphate;
- an inorganic phosphate having at least two acid hydrogen atoms or an inorganic orthophosphate or a mixture thereof wherein said transesterification inhibitor is present in an amount from 0.01 to 2 parts by weight per 100 parts by weight A and B, and
- D) a nucleating agent selected from the group consisting essentially of talcum;
- carbon black or a mixture thereof wherein said nucleating agent is present in an amount from 0.05 to 5 parts by weight per 100 parts by weight A and B.
4 more elements
Dependencies are inferred from the claim text.