Bi-axially stretched product

Patent metadata

Field	Value
Publication number	US-9243109-B2
Application number	US-201214130148-A
Country	US
Kind code	B2
Filing date	Jun 28, 2012
Priority date	Jun 30, 2011
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

This invention relates to a biaxially stretched product comprising a copolyamide comprising monomeric units of: aliphatic non-cyclic diamines X and aliphatic non-cyclic dicarboxylic acids Y or aliphatic non-cyclic α,ω-amino acids Z, and diamines M and diacids N in an amount between 0.1 to 2 wt % based on the total amount of copolyamide, and in which M and N are cyclic, and wherein the product has been stretched at a temperature of between the glass transition temperature (Tg) and the melting temperature (Tm). A method of preparation is claimed, as well as a multilayer film comprising the biaxially stretched product.

First claim

The invention claimed is:

1. A biaxially stretched product comprising a copolyamide comprising monomeric units of:
(i) aliphatic non-cyclic diamines X and aliphatic non-cyclic dicarboxylic acids Y or aliphatic non-cyclic α,ω-amino acids Z, and
(ii) diamines M and diacids N in an amount between 0.1 to 1.5 wt % based on the total amount of copolyamide, and in which M and N are cyclic, wherein
the product has been stretched at a temperature of between the glass transition temperature (Tg) and the melting temperature (Tm).

2. The biaxially stretched product according to claim 1 , in which N is selected from the group consisting of isophthalic acid (I), terephthalic acid (T), 4-methylisophthalic acid, 4-tert-butylisophthalic acid, 1,4-naphthalenedicarboxylic acid and 2,6-naphthalenedicarboxylic acid.

3. The biaxially stretched product according to claim 1 , in which M is selected from the group consisting of isophoronediamine (IPD), bis-(p-aminocyclohexane)methane (PACM), 2,2-Di-(4-aminocyclohexyl)-propane, 3,3′-dimethyl-4-4′-diaminodicyclohexylmethane, p-xylylenediamine, m-xylylenediamine, and 3,6-bis(aminomethyl)norbornane.

4. The biaxially stretched product according to claim 1 , wherein
(a) M is selected from the group consisting of isophoronediamine (IPD), bis-(p-aminocyclohexane)methane (PACM), 2,2-Di-(4-aminocyclohexyl)-propane, 3,3′-dimethyl-4-4′-diaminodicyclohexylmethane, p-xylylenediamine, m-xylylenediamine, and 3,6-bis(aminomethyl)norbornane, and
(b) N is selected from the group consisting of isophthalic acid (I), terephthalic acid (T), 4-methylisophthalic acid, 4-tert-butylisophthalic acid, 1,4-naphthalenedicarboxylic acid and 2,6-naphthalenedicarboxylic acid, cis-1,4-cyclohexanedicarboxylic acid, trans-1,4-cyclohexanedicarboxylic acid, cis-1,3-cyclohexanedicarboxylic acid and trans-1,3-cyclohexanedicarboxylic acid.

5. The biaxially stretched product according to claim 1 , wherein Z is selected from the group consisting of ε-caprolactam, aminodecanoic acid, aminoundecanoic acid and aminododecanoic acid.

6. The biaxially stretched product according to claim 1 , wherein X is selected from the group consisting of 1,4-diaminobutane, diaminopentane and hexamethylene diamine.

7. The biaxially stretched product according to claim 1 , whereinany of the claims 1 to 4 , wherein Y is chosen from the group of 1,6-hexanedioic acid, 1,8-octanedioic acid, 1,9-nonanedioic acid, 1,11-decanedioic acid, undecandioic acid, 1,12-dodecanedioic acid.

8. The biaxially stretched product according to any one of the claims 1 - 4 , wherein Z is ε-caprolactam.

9. The biaxially stretched product according to claim 1 , wherein X is hexamethylene diamine and Y is hexamethylene diacid.

10. The biaxially stretched product according to claim 1 , wherein the monomeric units of cyclic diamines of M is isophorone diamine and the monomeric units of cyclic diacids of N is terephthalic acid.

11. The biaxially stretched product according to claim 1 , wherein Z is ε-caprolactam and wherein M is isophorone diamine and N is terephthalic acid.

12. The biaxially stretched product according to claim 1 , wherein X is 1,4-diaminobutane and Y is an aliphatic non-cyclic dicarboxylic acid with at least 8 carbon atoms.

13. A method for preparation of a biaxially stretched product according to claim 1 , comprising the steps of:
(A) preparing a copolyamide comprising:
(i) aliphatic non-cyclic diamines X and aliphatic non-cyclic dicarboxylic acids Y or aliphatic non-cyclic α,ω-amino acids Z, and
(ii) cyclic diamines M and cyclic diacids N in an amount between 0.1 to 1.5 wt % based on the total amount of copolyamide, and

(B) subsequently making a product from the copolyamides followed by stretching the product at a temperature of between the glass transition temperature (Tg) and the melting temperature (Tm) of the copolyamide.

14. A multilayer film comprising at least one layer of the biaxially stretched product according to claim 1 .

Assignees

• Stroeks Alexander Antonius Marie
• Tomic Katarina
• Dsm Ip Assets Bv

Inventors

• Stroeks Alexander Antonius Marie
• Tomic Katarina

Classifications

• B29C55/12 Primary

  biaxial · CPC title

• C08G69/36

  derived from amino acids, polyamines and polycarboxylic acids · CPC title

• B29C55/06

  parallel with the direction of feed · CPC title

• C08J2377/00

  Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers · CPC title

• C08G69/26 Primary

  derived from polyamines and polycarboxylic acids · CPC title