	US 12,454,606 B2
	Method of producing reprocessed material of recycled polyvinyl butyral
Yuh-Jye Uang, Taichung (TW)
Assigned to Yuh-Jye Uang, Taichung (TW); Shu-Hue Shao, Taichung (TW); and FENGDA COMPOSITE MATERIALS CO., LTD., Taichung (TW)
Filed by Yuh-Jye Uang, Taichung (TW); Shu-Hue Shao, Taichung (TW); and FENGDA COMPOSITE MATERIALS CO., LTD., Taichung (TW)
Filed on Sep. 23, 2022, as Appl. No. 17/951,149.
Claims priority of application No. 110145963 (TW), filed on Dec. 8, 2021.
Prior Publication US 2023/0174737 A1, Jun. 8, 2023
Int. Cl. C08G 63/02 (2006.01); C08J 11/22 (2006.01); C08J 11/28 (2006.01); C09J 129/14 (2006.01); C09J 175/04 (2006.01)

CPC C08J 11/22 (2013.01) [C08J 11/28 (2013.01); C09J 129/14 (2013.01); C09J 175/04 (2013.01); C08J 2329/14 (2013.01)]

12 Claims

1. A method of producing a reprocessed material of recycled polyvinyl butyral, comprising steps of:

step (A): heating a first mixture, which comprises recycled polyvinyl butyral and an antiblocking agent; and

step (B): adding a free radical initiator into the first mixture to undergo a reaction, so as to obtain the reprocessed material of recycled polyvinyl butyral;

wherein the free radical initiator comprises an azo compound, an organic peroxide or a combination thereof; the organic peroxide is selected from a group consisting of: 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy) hexane, dilauroyl peroxide, benzoyl peroxide and any combination thereof;

wherein the reprocessed material of recycled polyvinyl butyral has a melt flow index (MI) of greater than 7 g/10 min at a temperature of 190° C. and under 2.16 kg of load.