Polyurethane ionomers and methods for their preparation and...

Details Polyurethane ionomers and methods for their preparation and... Polyurethane ionomers and methods for their preparation and...

2005-10-25

2005-10-25

Gorr, Rachel (Department: 1711)

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C528S059000, C525S131000, C525S452000, C473S372000, C473S385000

Reexamination Certificate

active

06958380

ABSTRACT:
The invention relates to improved polyurethane ionomers and methods for making the same. It was found that the polyurethane anionomers obtained by using the method of the invention had improved physical properties than those made by conventional methods. For example, the polyurethane ionomers produced by the method of the invention exhibit a plateau in the plot of elasticity modulus (as log10E′) vs. temperature over a useful and relatively broad temperature and frequency range. The polyurethane ionomers have nearly temperature-independent elasticity over a 50° C. range in the region of ˜−20 to +75° C. Another advantage is that the polyurethane ionomers of the invention are optically clearer than the conventionally prepared polyurethane ionomers. A further advantage of the invention is that the synthetic process of making the polyurethane ionomers is much faster than the known process for equivalent compositions. Additionally, striking tensile strength properties were observed for the polyurethane ionomers.

REFERENCES:
patent: 3998870 (1976-12-01), Carlson
patent: 5443674 (1995-08-01), Fresonke et al.
patent: 5661207 (1997-08-01), Carlson et al.
patent: 5692974 (1997-12-01), Wu et al.
patent: 6174956 (2001-01-01), Kerschner et al.
patent: 6203451 (2001-03-01), Rajagopalan
patent: 6207784 (2001-03-01), Rajagopalan
Copy of International Search Report dated Dec. 30, 2004.

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