Process for the preparation of a modified polymer for powder pai

Details Process for the preparation of a modified polymer for powder pai Process for the preparation of a modified polymer for powder pai

1996-07-23

1998-11-03

Niland, Patrick D.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

523318, 524589, 525 28, 525107, 525440, 525123, 525455, 528 44, C08J 300, C08K 320, C08L 7500, C08F 830

Patent

active

058309438

ABSTRACT:
The invention relates to a process for the preparation of a modified polymer by reaction between a reactive polymer and at least a compound containing two or more functional groups. The polymer, which is solid at room temperature, is mixed, at a temperature at which the viscosity of the polymer is lower than 10000 dPas (measured according to Emila), with a compound containing two or more functional groups in a mixing means for achieving a homogeneous product and the mean residence time and the residence time distribution being chosen so that more than 50% of the reactive groups of the polymer has reacted.
As means to make the composition homogeneous use is made of a static mixer.
The functional groups of the compound containing two or more functional groups have different reactivities.
The invention also relates to a binder composition, which comprises the modified polymer thus obtained and a crosslinker.

REFERENCES:
patent: 3286992 (1966-11-01), Armeniades et al.
patent: 3404869 (1968-10-01), Harder
patent: 3664638 (1972-05-01), Grout et al.
patent: 3704006 (1972-11-01), Grout et al.
patent: 3940453 (1976-02-01), Labana et al.
patent: 4535132 (1985-08-01), Ambrose et al.
patent: 4818791 (1989-04-01), Murakami et al.
patent: 4900800 (1990-02-01), Halpaap et al.
patent: 5097006 (1992-03-01), Kapilow et al.

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