Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-03-08
2005-03-08
Pezzuto, Helen L. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S310000, C526S317100, C526S320000, C526S328500, C526S329600
Reexamination Certificate
active
06864337
ABSTRACT:
It is an object of the present invention to provide a polycarboxylic acid copolymer which improves the water reducing capacity and workability of cement compositions and the like and making them easier to handle when the fluidity and water reducing capacity are at the same levels, a method of producing the copolymer, and a cement additive and a cement composition comprising the copolymer. The present invention is further to provide a polycarboxylic acid copolymer and a cement additive which are capable of improving the strength and durability of hardening products of cement compositions, hence can advantageously be used in ultrahigh strength concrete. The present invention is still further to provide a method of producing polycarboxylic acid copolymers having high water reducing capacity, reducing the viscosity of cement compositions and improving the workability in applying cement.The present invention is directed to a polycarboxylic acid copolymer which is obtained by copolymerization of monomer components comprising a polyalkyleneimine unsaturated monomer (A1) and an unsaturated carboxylic acid monomer (B).
REFERENCES:
patent: 4471100 (1984-09-01), Tsubakimoto et al.
patent: 5034444 (1991-07-01), Yun et al.
patent: 5911820 (1999-06-01), Satoh et al.
patent: 6114464 (2000-09-01), Reck et al.
patent: 0 174 644 (1986-03-01), None
patent: 1 184 353 (2002-03-01), None
patent: 07-010943 (1995-01-01), None
patent: 7-215746 (1995-08-01), None
patent: 07-247150 (1995-09-01), None
patent: 11-269239 (1999-10-01), None
patent: 2000-063164 (2000-02-01), None
patent: 2000-159555 (2000-06-01), None
patent: 2000-191356 (2000-07-01), None
patent: 2000-247706 (2000-09-01), None
patent: 2000-319054 (2000-11-01), None
patent: 2001-146447 (2001-05-01), None
patent: 2001-146449 (2001-05-01), None
patent: 2001-220440 (2001-08-01), None
International Search Report dated Apr. 17, 2002, Int'l Appl. No. PCT/JP01/11437, 2 pages.
Hirata Tsuyoshi
Izukashi Hiroko
Nishikawa Tomotaka
Onda Yoshiyuki
Sakamoto Noboru
Connolly Bove & Lodge & Hutz LLP
Nippon Shokubai Co. , Ltd.
Pezzuto Helen L.
LandOfFree
Polycarboxylic acid copolymer, production method and use... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polycarboxylic acid copolymer, production method and use..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polycarboxylic acid copolymer, production method and use... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3418177