Toner binder and process for producing the same

Details Toner binder and process for producing the same Toner binder and process for producing the same

2006-01-31

2006-01-31

Robertson, Jeffrey B. (Department: 1712)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S425000, C525S437000, C525S439000, C430S109100, C430S109400

Reexamination Certificate

active

06992150

ABSTRACT:
A toner binder for dry toners which comprises a polyester; and a process for producing the toner binder. A known conventional technique for imparting low-temperature fixing property and anti-hot offset property to a toner binder is to use a mixture of two powdery polyesters. However, when the two polyesters mixed differ greatly in softening point, the effect of mixing is not obtained and pigments show poor dispersibility during toner production. The toner binder and the process eliminate these problems. The toner binder comprises aggregates of binder resin particles comprising two polyesters (A) and (B), wherein the polyester (A) has a higher softening point than the polyester (B) and the polyesters (A) and (B) have been evenly mixed in each particle. The process for producing a toner binder is characterized by melt-mixing the two polyesters (A) and (B) at 80 to 180° C. The toner binder is used mainly as an ingredient for dry toners.

REFERENCES:
patent: 5202212 (1993-04-01), Shin et al.
patent: 5773183 (1998-06-01), Doujo et al.
patent: 5814428 (1998-09-01), Kido et al.
patent: 6168894 (2001-01-01), Aoki et al.
patent: 6344302 (2002-02-01), Kurose et al.
patent: 6506530 (2003-01-01), Kido et al.
patent: 6534229 (2003-03-01), Ohba et al.
patent: 0 974 871 (2000-01-01), None
patent: 60-214368 (1985-10-01), None
patent: 63-225244 (1988-09-01), None
patent: 64-15755 (1989-01-01), None
patent: 4-211272 (1992-08-01), None
patent: 4-313760 (1992-11-01), None
patent: 7-140714 (1995-06-01), None
patent: 8-272138 (1996-10-01), None
patent: 9-104741 (1997-04-01), None
patent: 9-204071 (1997-08-01), None
patent: 9-269612 (1997-10-01), None
patent: 10-246983 (1998-09-01), None
patent: 11-024313 (1999-01-01), None
patent: 11-133660 (1999-05-01), None
patent: 2000-39738 (2000-02-01), None
patent: 2000-56504 (2000-02-01), None
patent: WO 01/69325 (2001-09-01), None

Affiliated with

Also associated with

Rating

Toner binder and process for producing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Toner binder and process for producing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toner binder and process for producing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3528870