Claims
- 1. A process for the manufacture of thermoplastic block polyetheresteramide comprising polycondensing
- (a) at least one linear polyamide having carboxyl end groups, said polyamide having a molecular weight of 700-15,000, with
- (b) approximately equimolar quantities of .alpha.,.omega.-dihydroxypolyether having a molecular weight of from 400 to 4,000
- in the presence of 0.01-5% by weight, relative to the total weight of (a) and (b), of an esterification catalyst selected from organic or inorganic stannous compounds, said polycondensing being conducted at a pressure between atmospheric pressure and high vacuum, and at temperature of about 210.degree. to about 280.degree. C.
- 2. The process of claim 1 wherein said polyamide having carboxyl groups is obtained by reacting the monomers of a polyamide selected from polyamide-6, polyamide-11, polyamide-12, polyamide-6.6, polyamide-6.9, polyamide-6.10, polyamide-6.12, polyamide-6.13, or mixtures thereof with at least one acid selected from linear or branched aliphatic dicarboxylic acids having 4-13 carbon atoms or aromatic or cycloaliphatic dicarboxylic acids containing at least 8 carbon atoms.
- 3. The process of claim 1 wherein said .alpha.,.omega.-dihydroxypolyether is selected from polyether diols or copolyether diols having a molecular weight of from 500 to 3,000, and wherein the oxygen atoms are separated from each other by at least 2 carbon atoms in a branched chain or by a linear chain of 2-4 carbon atoms.
- 4. The process of claim 1 wherein said inorganic stannous compounds are selected from the group consisting of chalcogenides, halides, salts of inorganic acids and complex compounds.
- 5. The process of claim 1 wherein said organic stannous compounds are selected from the group consisting of stannous salts of mono- and multifunctional aliphatic, cycloaliphatic, and aromatic carboxylic acids.
- 6. The process of claim 1 wherein said esterification catalyst is selected from stannous salts of polyamides having carboxyl end groups.
- 7. The process of claim 2 wherein said inorganic stannous compounds are selected from the group consisting of chalcogenides, halides, salts of inorganic acids and complex compounds.
- 8. The process of claim 3 wherein said inorganic stannous compounds are selected from the group consisting of chalcogenides, halides, salts of inorganic acids and complex compounds.
- 9. The process of claim 2 wherein said organic stannous compounds are selected from the group consisting of stannous salts of mono- and multifunctional aliphatic, cycloaliphatic, and aromatic carboxylic acids.
- 10. The process of claim 3 wherein said organic stannous compounds are selected from the group consisting of stannous salts of mono- and multifunctional aliphatic, cycloaliphatic, and aromatic carboxylic acids.
- 11. The process of claim 2 wherein said esterification catalyst is selected from stannous salts of polyamides having carboxyl end groups.
- 12. The process of claim 3 wherein said esterification catalyst is selected from stannous salts of polyamides having carboxyl end groups.
- 13. The process of claim 1 wherein said temperature is 230.degree.-270.degree. C.
- 14. The process of claim 1 wherein said pressure is from 0.1 mbar to 1 atmosphere.
- 15. The process of claim 1 wherein said catalyst is mixed with said component (a) prior to the addition of said component (b).
- 16. The process of claim 1 wherein said catalyst is an organic stannous compound and is added to a mixture of said components (a) and (b).
Priority Claims (1)
Number |
Date |
Country |
Kind |
4228/83 |
Aug 1983 |
CHX |
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Parent Case Info
This application is a continuation of application Ser. No. 636,147, filed 07/31/83, now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
Country |
Parent |
636147 |
Jul 1984 |
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