Polyblends containing polyurethane, polymer and siloxane crossli

Details Polyblends containing polyurethane, polymer and siloxane crossli Polyblends containing polyurethane, polymer and siloxane crossli

1991-05-22

1993-02-02

Marquis, Melvyn I.

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

Synthetic resins

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

525125, C08F 832

Patent

active

051838524

ABSTRACT:
The invention pertains to blends of polymers containing a polyurethane, a polymer having reactive carboxyl moieties and a siloxane crosslinking agent. The polymer is most preferably represented by a terpolymer. The crosslinking agent contains reactive moieties such as hydroxy-, amine-, and epoxy-moieties and has a molecular weight which is preferably in the range of from about 1,500 to 60,000. The crosslinker can be used in relatively low molecular ratios vs. the polymerisable dicarboxylic acid in the polymer. Shaped articles made from the polyblends herein can be processed under high temperature conditions without suffering alterations; the articles so produced show desirable physical properties inclusive of reduced plasticiser migration, reduced fogging and enhanced low-temperature flexibility.

REFERENCES:
patent: 3691257 (1972-09-01), Kendrick et al.
patent: 4320172 (1987-03-01), Takamizawa et al.
patent: 4968750 (1990-11-01), Eichenauer et al.
patent: 4980417 (1990-12-01), Biglione et al.
Billmeyer, Textbook of Polymer Science (1965), p. 438.
Modern Plastics Encyclopedia (1988), pp. 103,106,108.

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