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US 5,177,149 AGranted
Thermoplastic blends of amorphous polyamides and poly(alkenyl aromatic) resins
AssigneeGeneral Electric Company
InventorsStephen R. Angeli, Louis M. Maresca
Life of this patent
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Abstract
Thermoplastic blends of amorphous polyamide resins with poly(alkenyl aromatic) resins have improved properties over previously known blends, including producing clear, transparent blends over their entire compositional range.
Claims17
A thermoplastic resin device consisting of:
- (a) an amorphous polyamide resin polymerized from monomers comprising nonsymmetric monomers;
- and
- (b) a poly(alkenyl aromatic) resin consisting of units of the formula:
- ##STR2## wherein R.sup.1 and R.sup.2 are selected from the group consisting of lower alkyl or alkenyl groups of from 1 to 6 carbon atoms, and hydrogen;
- R.sup.3 is selected from the group consisting of chloro, bromo, fluoro, hydrogen, and lower alkyl of from 1 to 6 carbon atoms and is attached to the aromatic ring in at least one position;
- and n is an integer from 0 to 5.
3 more elements
An optical device comprising a resin blend consisting of (a) an amorphous polyamide resin polymerized from monomers comprising non-symmetric monomers;
- and (b) a poly(alkenyl aromatic) resin which consists of units of the formula ##STR3## wherein R.sup.1 and R.sup.2 are selected from the group consisting of lower alkyl or alkenyl groups of from 1 to 6 carbon atoms, and hydrogen;
- R.sup.3 is selected from the group consisting of chloro, bromo, fluoro, hydrogen, and lower alkyl groups of from 1 to 6 carbon atoms and is attached to the aromatic ring in at least one position;
- and n is an integer of from 0 to 5;
- said optical device being optically transparent exhibiting negligible birefringence values.
1 more element
A thermoplastic resin composition consisting of:
- (a) an amorphous polyamide comprising the reaction product of hexamethylene diamine and isophthalic acid;
- and
- (b) a poly(alkenyl aromatic) resin consisting of units of the formula:
- ##STR4## wherein R.sup.1 and R.sup.2 are selected from the group consisting of lower alkyl or alkenyl groups of from 1 to 6 carbon atoms, and hydrogen;
- R.sup.3 is selected from the group consisting of chloro, bromo, fluoro, hydrogen, and lower alkyl groups of from 1 to 6 carbon atoms and is attached to the aromatic ring in at least one position;
- and n is an integer from 0 to 5.
3 more elements
Dependencies are inferred from the claim text.