Use of dialkyl carbonates as solvents for expanded polystyrene

Details Use of dialkyl carbonates as solvents for expanded polystyrene Use of dialkyl carbonates as solvents for expanded polystyrene

2004-08-31

2010-06-29

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

C521S047000, C528S480000, C528S491000, C528S495000

Reexamination Certificate

active

07745503

ABSTRACT:
The invention relates to the use of dialkyl carbonates as solvents for expanded polystyrene and to a new process for the recycling of expanded polystyrene. Said process comprises the volume reduction of expanded polystyrene by dissolution with a dialkyl carbonate, or a blend of dialkyl carbonates, the removal of the insoluble components by filtration, the selective precipitation of polystyrene with a non-solvent or a blend of non-solvents, the separation, drying and extrusion of the precipitated polystyrene. This process allows the recovery of pure polystyrene without altering its properties.

REFERENCES:
patent: 4405394 (1983-09-01), Cohen
patent: 5232954 (1993-08-01), Peters
patent: 5532023 (1996-07-01), Vogel et al.
patent: 5629352 (1997-05-01), Shiino et al.
patent: 6169121 (2001-01-01), Noguchi et al.
patent: 7241858 (2007-07-01), Katz et al.
patent: 7321003 (2008-01-01), Katz et al.
patent: 2005/0032917 (2005-02-01), Katz et al.
patent: 2006/0106121 (2006-05-01), Seki et al.
patent: 102 07 336 (2003-05-01), None
patent: 102 07 336 (2003-05-01), None
patent: 11 005865 (1999-01-01), None
patent: 11 080418 (1999-03-01), None

Affiliated with

Also associated with

Rating

Use of dialkyl carbonates as solvents for expanded polystyrene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Use of dialkyl carbonates as solvents for expanded polystyrene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of dialkyl carbonates as solvents for expanded polystyrene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4190611