US 12,291,611 B2
Solid-state method for treating polyamide and polyester articles
Xia Zhao, Malvern, PA (US)
Assigned to GREEN THEME TECHNOLOGIES, INC., Rio Rancho, NM (US)
Filed by Green Theme Technologies Inc., Rio Rancho, NM (US)
Filed on Sep. 15, 2023, as Appl. No. 18/468,485.
Application 18/468,485 is a continuation of application No. 17/583,945, filed on Jan. 25, 2022, granted, now 11,760,847.
Prior Publication US 2024/0002610 A1, Jan. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 3/24 (2006.01); C08J 7/04 (2020.01); D06M 13/364 (2006.01); D06M 13/53 (2006.01); D06M 15/643 (2006.01); D06M 15/71 (2006.01)
CPC C08J 3/245 (2013.01) [C08J 7/0427 (2020.01); D06M 13/364 (2013.01); D06M 13/53 (2013.01); D06M 15/643 (2013.01); D06M 15/71 (2013.01); C08J 2377/06 (2013.01); C08J 2483/07 (2013.01)] 20 Claims
 
1. A solid-state method for treating a thermoplastic article which thermoplastic article comprises a thermoplastic material component having a crystalline melting temperature of at least 100° C., in which the thermoplastic material component comprises at least one thermoplastic resin, the method comprising:
a) at a temperature below the crystalline melting temperature of the thermoplastic material component, applying a coating composition to at least one surface of the article and into contact with at least one thermoplastic polymer of the thermoplastic material component of the article, wherein the coating composition comprises i) at least 20 weight percent of at least one polyene compound, the polyene compound having 2 to 6 vinyl groups, an equivalent weight per vinyl group of up to 500 g/equivalent, and (ii) at least one peroxy or azo free radical initiator; and
b) heating the coated article to a temperature to decompose the peroxy or azo free radical initiator to form free radicals and produce crosslinking in the thermoplastic resin to provide a crosslinked thermoplastic article exhibiting one or more of i) non-melting behavior characteristics of thermoset resins, ii) delayed ignition when exposed to an open flame or heat compared to the thermoplastic article prior to the crosslinking, and iii) reduced dripping when exposed to an open flame or heat compared to the thermoplastic article prior to the crosslinking, wherein the temperature is below the crystalline melting temperature of the thermoplastic material component.