US 11,697,719 B2
Method for enhanced bonding of thermoplastic composites
Megha Sahu, Bangalore (IN); Om Prakash, Bangalore (IN); Shantanu Bhattacharya, Kanpur (IN); and Poonam Sundriyal, Kanpur (IN)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Mar. 2, 2020, as Appl. No. 16/806,767.
Prior Publication US 2021/0269608 A1, Sep. 2, 2021
Int. Cl. C08J 7/043 (2020.01); B05D 3/14 (2006.01); C08J 5/12 (2006.01)
CPC C08J 7/043 (2020.01) [B05D 3/148 (2013.01); C08J 5/124 (2013.01); C08J 2371/00 (2013.01); C08J 2463/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of extending the shelf-life of an activated surface of a thermoplastic material, comprising:
coating at least a portion of a surface of the thermoplastic material with at least one adhesion promoter to provide a coated surface; and
treating the coated surface with plasma to provide the activated surface of the thermoplastic material;
wherein the activated surface has a contact angle in the range of from about 0 to about 40°, and
wherein the presence of the at least one adhesion promoter is effective to maintain the contact angle in the range of from about 0 to about 40° for a time of about 10 days or greater,
wherein the at least one adhesion promoter is PEG-silane.