Cured thermosets and glass-reinforced composites from unsaturated polyetherester resins
AssigneeArco Chemical Technology, L.P.
InventorsLau S. Yang, Keith G. Johnson
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Abstract
Polymer blends of unsaturated polyetherester resins and dicyclopentadiene polyester resins give single-phase, cured thermosets having high tensile and flexural strength. The thermosets exhibit a single glass-transition temperature within the range of about 70.degree. C. to about 150.degree. C. The synergism resulting from polymer blending provides a cost-effective way to improve the strength properties of cured polyetherester thermosets, and coincidentally, gives a way to improve the flexibility and toughness of cured DCPD polyester thermosets. Glass-reinforced thermosets made from polyetherester resin blends show exceptional structural fatigue resistance.
Claims20
A cured thermoset which comprises the reaction product of a vinyl aromatic monomer, a free-radical initiator, and a polymer blend, wherein the polymer blend comprises a single phase and contains from about 1 to about 99 wt.% of an unsaturated polyetherester resin and from about 1 to about 99 wt.% of a dicyclopentadiene polyester resin;
- and wherein the cured thermoset exhibits a single glass-transition temperature within the range of about 70.degree. C. to about 150.degree. C.
A cured thermoset which comprises the reaction product of:
- (a) from about 30 to about 90 wt.% of a polymer blend;
- (b) from about 10 to about 70 wt.% of a vinyl aromatic monomer, both ranges based on the amount of cured thermoset;
- and
- (c) a free-radical initiator;
- wherein the polymer blend comprises a single phase and contains from about 1 to about 99 wt.% of an unsaturated polyetherester resin;
- and from about 1 to about 99 wt.% of a dicyclopentadiene polyester resin;
- and
- wherein the cured thermoset exhibits a single glass-transition temperature within the range of about 70.degree. C. to about 150.degree. C.
A cured thermoset which comprises the reaction product of:
- (a) from about 50 to about 70 wt.% of a polymer blend;
- (b) from about 30 to about 50 wt.% of styrene, both ranges based on the amount of cured thermoset;
- and
- (c) a peroxide initiator;
- wherein the polymer blend comprises from about 25 to about 75 wt.% of an unsaturated polyetherester resin;
- and from about 25 to about 75 wt.% of a dicyclopentadiene polyester resin;
- and
- wherein the cured thermoset exhibits a single glass-transition temperature within the range of about 70.degree. C. to about 150.degree. C.
Dependencies are inferred from the claim text.