FIBROUS PRODUCTS FROM THERMOPLASTIC POLYAMIDE POLYMERS

• US 3,772,136 A
• Filed: 04/20/1971
• Issued: 11/13/1973
• Est. Priority Date: 04/20/1971
• Status: Expired due to Term

• Current Assignee: Clayton E. Workman
• Original Assignee: Clayton E. Workman
• Inventors: Workman, Clayton E.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Thibodeau, Paul J.
• Application Number:
  US05/135,682
• Time in Patent Office: 938 Days
• Field of Search: 156/62.2,62.4,62.6 161/169 264/205,29N 260/404.5,32.6N,18N 117/21
• US Class Current: 428/395
• CPC Class Codes: C08G 69/34 using polymerised unsaturated fatty acids
• CPC Class Codes: C08G 69/36 derived from amino acids, polyamines and polycarboxylic acids
• CPC Class Codes: D04H 1/56 in association with fibre formation, e.g. immediately following extrusion of staple fibres
• CPC Class Codes: Y10T 156/1054 and simultaneously bonding [e.g., cut-seaming]
• CPC Class Codes: Y10T 428/2969 Polyamide, polyimide or polyester

Abstract

An air pervious, water repellent, self-supporting fibrous mat is produced by spraying a mixture of polyamide polymer and a suitable, rapidly evaporating compatible solvent. The fibrous mats are suitable for use as fabrics, decorative applications, tamper-proof bottle sealers, packaging materials, etc.

Claims

2. The fibrous mat of claim 1 wherein the polymeric fat acid is polymerized tall oil fatty acid.

3. The fibrous mat of claim 2 wherein the polymeric fat acid has a dimer acid content of at least 80 percent by weight.

4. The fibrous mat of claim 1 wherein the diamine has the formula of H2N-R'"'"''"'"'-NH2 wherein R'"'"''"'"' is An aliphatic, cycloaliphatic or aromatic hydrocarbon radical of 2-40 carbon atoms.

5. The fibrous mat of claim 1 wherein the polyamide is selected from the group consisting of a. the reaction product of polymerized tall oil fatty acid and hexamethylene diamine, b. the reaction product of polymerized tall oil fatty acid and 4,4'"'"''"'"'-diamino-3,3'"'"''"'"'-dimethyl (dicyclohexyl) methane, c. a copolymer of polymerized tall oil fatty acid, azelaic acid, hexamethylenediamine, and ethylenediamine, d. a copolymer of epsilon-caprolactam, adipic acid and hexamethylenediamine, and sebacic acid and hexamethylenediamine, and e. a copolymer of epsilon-caprolactam, adipic acid and hexamethylenediamine, sebacic acid and hexamethylenediamine, and 11-aminoundecanoic acid.

6. The fibrous mat of claim 1 wherein the polyamide solution contains at least five percent by weight of dissolved polyamide.

7. The fibrous mat of claim 6 wherein the solvent is a chlorinated hydrocarbon solvent.

8. The fibrous mat of claim 7 wherein the solvent is methylene chloride.

9. The fibrous mat of claim 7 wherein the solvent is chloroform.

10. The fibrous mat of claim 7 wherein the solvent is methyl chloroform.

11. The fibrous mat of claim 6 wherein the solvent is a mixture of solvents.

12. The fibrous mat of claim 11 wherein the solvent is a mixture of tetrahydrofuran containing up to 0.3 parts by weight of methanol per part of tetrahydrofuran.

13. A process of forming a bonded article which comprises simultaneously shearing at least two layers of the fibrous mat of claim 1 while the layers are in contact.