Abstract 1. A THERMOPLASTIC ELASTOMERIC COMPOSITION COMPRISING A BLEND OF: (1) 5 TO 75 PARTS BY WEIGHT OF A THERMOPLASTIC BLOCK COPOLYMER OF THE GENERAL FORMULA A-(B-A)N WHERE A IS THE SAME OR DIFFERENT RESINOUS BLOCK OF A POLYMERIZED OLEFINICALLY UNSATURATED COMPOUND HAVING A GLASS TRANSITION OF AT LEAST 25*C., B IS AN ELASTOMERIC BLOCK HAVING A GLASS TRANSITION TEMPERATURE OF LESS THAN 0*C. AND N IS A WHOLE NUMBER FROM 1 TO 3, AND WHERE A CONSTITUTES FROM ABOUT 25 TO ABOUT 65 PERCENT BY WEIGHT OF THE BLOCK COPOLYMER; AND (2) 95 TO 25 PARTS BY WEIGHT OF A CRYSTALLINE ALTERNATING COPOLYMER OF SUBSTANNTIALLY EQUIMOLAR AMOUNTS OF AN ACRYLIC NITRILE AND A CONJUGATED ALKADIENE SAID ALKADIENE BEING COMPOSED OF AT LEAST 40 MOLE PERCENT OF A 2-ALKYL BUTADIENE, AT LEAST 5005 OF SAID ALKADIENE BEING POLYMERIZED IN THE TRANS-1,4-CONFIGURATION, SAID ALTERNATING COPOLYMER HAVING A CRYSTILLINITY IN IITS RELAXED STATE AT ROOM TEMPERATURE OF ABOUT 5-35% AS MEASURED BY X-RAY DIFFRACTION.
A THERMOPLASTIC ELASTOMERIC COMPOSITION COMPRISING A BLEND OF: (1) 5 TO 75 PARTS BY WEIGHT OF A THERMOPLASTIC BLOCK COPOLYMER OF THE GENERAL FORMULA A-(B-A)N WHERE A IS THE SAME OR DIFFERENT RESINOUS BLOCK OF A POLYMERIZED OLEFINICALLY UNSATURATED COMPOUND HAVING A GLASS TRANSITION OF AT LEAST 25*C., B IS AN ELASTOMERIC BLOCK HAVING A GLASS TRANSITION TEMPERATURE OF LESS THAN 0*C. AND N IS A WHOLE NUMBER FROM 1 TO 3, AND WHERE A CONSTITUTES FROM ABOUT 25 TO ABOUT 65 PERCENT BY WEIGHT OF THE BLOCK COPOLYMER; AND (2) 95 TO 25 PARTS BY WEIGHT OF A CRYSTALLINE ALTERNATING COPOLYMER OF SUBSTANNTIALLY EQUIMOLAR AMOUNTS OF AN ACRYLIC NITRILE AND A CONJUGATED ALKADIENE SAID ALKADIENE BEING COMPOSED OF AT LEAST 40 MOLE PERCENT OF A 2-ALKYL BUTADIENE, AT LEAST 5005 OF SAID ALKADIENE BEING POLYMERIZED IN THE TRANS-1,4-CONFIGURATION, SAID ALTERNATING COPOLYMER HAVING A CRYSTILLINITY IN IITS RELAXED STATE AT ROOM TEMPERATURE OF ABOUT 5-35% AS MEASURED BY X-RAY DIFFRACTION.
Claim 2
Dependent Claim
160 words
A THERMOPLASTIC ELASTOMERIC COMPOSITION COMPRISING A BLEND OF: (1) 5 TO 75 PARTS BY WEIGHT OF A THERMOPLASTIC BLOCK COPOLYMER OF THE GENERAL FORMULA A-(B-A)N WHERE A IS THE SAME OR DIFFERENT RESINOUS BLOCK OF A POLYMERIZED OLEFINICALLY UNSATURATED COMPOUND HAVING A GLASS TRANSITION OF AT LEAST 25*C., B IS AN ELASTOMERIC BLOCK HAVING A GLASS TRANSITION TEMPERATURE OF LESS THAN 0*C. AND N IS A WHOLE NUMBER FROM 1 TO 3, AND WHERE A CONSTITUTES FROM ABOUT 25 TO ABOUT 65 PERCENT BY WEIGHT OF THE BLOCK COPOLYMER; AND (2) 95 TO 25 PARTS BY WEIGHT OF A CRYSTALLINE ALTERNATING COPOLYMER OF SUBSTANNTIALLY EQUIMOLAR AMOUNTS OF AN ACRYLIC NITRILE AND A CONJUGATED ALKADIENE SAID ALKADIENE BEING COMPOSED OF AT LEAST 40 MOLE PERCENT OF A 2-ALKYL BUTADIENE, AT LEAST 5005 OF SAID ALKADIENE BEING POLYMERIZED IN THE TRANS-1,4-CONFIGURATION, SAID ALTERNATING COPOLYMER HAVING A CRYSTILLINITY IN IITS RELAXED STATE AT ROOM TEMPERATURE OF ABOUT 5-35% AS MEASURED BY X-RAY DIFFRACTION.