Poly(alkylenetrimellitate imides) and method of preparation

• US 3,880,812 A
• Filed: 01/11/1974
• Issued: 04/29/1975
• Est. Priority Date: 01/11/1974
• Status: Expired due to Term

• Current Assignee: Herbert S. Golinkin, Robert G. Keske
• Original Assignee: Herbert S. Golinkin, Robert G. Keske
• Inventors: Golinkin, Herbert S., Keske, Robert G.
• Primary Examiner(s): Lee, Lester L.
• Application Number:
  US05/432,569
• Time in Patent Office: 473 Days
• Field of Search: 260/78TF,75N,78.3R
• US Class Current: 528/361
• CPC Class Codes: C08G 73/16 Polyester-imides

Abstract

Poly(alkylenetrimellitate imides) having an inherent viscosity of at least 0.3 dl/g suitable for forming films, coatings and molded objects.

Claims

1. POLY(ALKYLENETRIMELLITATE IMIDE) HAVING AN I.V. OF AT LEAST 0.3 DI/G AT 25*C AND 0.5%W/V 60/40 W/W PHENOL/-1,2,2TETRACHLOROETHANE.

2. The poly(alkylenetrimellitate imide) of claim 1, wherein said alkylene group comprises ethylene.

3. The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is a homopolymer.

4. The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is in the form of a self-supporting film.

5. The poly(alkylenetrimellitate imide) of claim 3, wherein the polymer is in the form of a self-supporting film having an I.V. of at least 0.7 dl/g.

6. The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is in the form of a coating on a substrate.

7. The poly(alkylenetrimellitate imide) of claim 2, wherein the polymer is in the form of a molded object.

8. The method of producing the polymer of claim 1 having an I.V. of at least 0.3 dl/g which comprises melt polymerizing an N-hydroxyalkyltrimellitic acid imide under melt polymerization conditions in the presence of a tin catalyst.

9. The method of producing the polymer of claim 1 having an I.V. of at least 0.3 dl/g which comprises the steps of (1) melt polymerizing an N-hydroxyalkyltrimellitic acid imide under melt polymerization conditions, and (2) further polymerizing the polymer produced in step 1 while maintaining the polymer in a solid state.

10. The method of producing the polymer of claim 1 having an I.V. of at leAst 0.3 dl per gram which comprises melt polymerizing and N-hydroxyalkyltrimetllitic acid imide under melt polymerization conditions in the presence of an antimony catalyst.