Light stable aliphatic thermoplastic urethane elastomers and met

Details Light stable aliphatic thermoplastic urethane elastomers and met Light stable aliphatic thermoplastic urethane elastomers and met

1994-10-07

1998-10-20

Short, Patricia A.

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...

524 91, 524589, 524839, 528 61, C08L 7504

Patent

active

058247386

ABSTRACT:
An improved light stable polyether/polyol based aliphatic urethane thermoplastic elastomer prepared from reacting inter alia a polyol having low terminal end unsaturation and an organic diisocyanate. The elastomer is characterized by ultraviolet stabilizer being present in a range of 0.25% to 2.0% at a total concentration of 1.0% to 2.0%, an antioxidant being present at a total concentration of 0.10% to 1.0%, and colorants/pigment being present in a total concentration in a range from 1.0% to 2.05% to produce an elastomer capable of withstanding Xenon arc artificial weathering with DE.ltoreq.3.00 after 2450 kilojoules of exposure.

REFERENCES:
patent: 4721531 (1988-01-01), Wildeman et al.
patent: 5096993 (1992-03-01), Smith et al.
patent: 5185420 (1993-02-01), Smith et al.

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