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...
Patent
1993-08-19
1994-12-13
Welsh, Maurice J.
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...
525459, 528 76, 528 80, 528 83, 528332, C08G 6700
Patent
active
053730437
ABSTRACT:
This invention relates to a solid particulate polymer comprising 1) a backbone containing (a) a plurality of moieties selected from the group consisting of alkylene, arylene, aralkylene, alkylarylene, cycloalkylene, alkyleneoxy, and polyalkyleneoxy; (b) a plurality of moieties selected from the group consisting of internal urea, thiourea, biuret and dithiobiuret; and 2) end groups selected from the group consisting of internal urea, thiourea, biuret and dithiobiuret. The particulate polymer dispersions can be used for preparing reinforced polymer matrices, especially where the matrix comprises urethane and/or urea linkages.
The invention allows for the preparation of a particulate polymer without using organic polyisocyanate.
REFERENCES:
patent: 4089835 (1978-05-01), Konig et al.
patent: 4374209 (1983-02-01), Rowlands
patent: 4477602 (1984-10-01), Liang et al.
patent: 4546121 (1985-10-01), Haas et al.
patent: 4701475 (1987-10-01), Turner
patent: 4994503 (1991-02-01), Harris et al.
Harris Robert F.
Joseph Michael D.
Savina Michael R.
The Dow Chemical Company
Welsh Maurice J.
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