Thermoplastic elastomers for adhesion to polyamide

1. A thermoplastic elastomer compound, comprising:

(a) high molecular weight maleated styrene-ethylene-butylene-styrene;

(b) plasticizer;

(c) processing aid;

(d) polyamide;

(e) a second styrene-containing thermoplastic elastomer;

(f) optional filler;

(g) optional anti-oxidant;

(h) optional anti-blocking agent; and

(i) other optional additives,

wherein the high molecular weight maleated styrene-ethylene-butylene-styrene has a weight average molecular weight of at least 200,000,

wherein the second styrene-containing thermoplastic elastomer is not maleated but has a weight average molecular weight in excess of 100,000, and

wherein the weight percents of the ingredients to the compound comprise:

high molecular weight maleated

5-80%

styrene-ethylene-butylene-styrene

plasticizer

10-60% 

polyamide

4-60%

processing aid

4-40%

second styrene-containing

2-35%

thermoplastic elastomer

filler

0-50%

optional anti-oxidant

 0-3%

optional anti-blocking Agent

 0-3%

other optional additives

  0-15%.

2. The compound of claim 1 , wherein the second styrene-containing thermoplastic elastomer is selected from the group consisting of styrene-ethylene-butylene-styrene, styrene-ethylene-propylene-styrene, styrene-ethylene-ethylene/propylene-styrene, styrene-isobutylene-styrene, styrene-butadiene-styrene, styrene-isoprene-styrene, and combinations thereof.

3. The compound of claim 1 , wherein the second styrene-containing thermoplastic elastomer is styrene-ethylene-ethylene/propylene-styrene and wherein the compound further comprises maleated polypropylene.

4. The compound of claim 1 , wherein the plasticizer is a paraffinic oil.

5. The compound of claim 1 , wherein the processing aid is a hydrocarbon resin.

6. The compound of claim 1 , further comprising adhesion promoters; biocides; anti-fogging agents; anti-static agents; bonding, blowing and foaming agents; dispersants; fillers and extenders; fire and flame retardants and smoke suppressants; impact modifiers; initiators; lubricants; micas; pigments, colorants and dyes; plasticizers; additional processing aids; release agents; silanes, titanates and zirconates; slip and anti-blocking agents; stabilizers; stearates; ultraviolet light absorbers; viscosity regulators; waxes; or combinations of them.

7. A two-component article, comprising the compound of claim 1 as one component and polyamide as the second component.

8. The two-component article of claim 7 , wherein the second styrene-containing thermoplastic elastomer is styrene-ethylene-ethylene/propylene-styrene and wherein the compound further comprises maleated polypropylene.

9. The compound of claim 2 , wherein the plasticizer is a paraffinic oil.

10. The compound of claim 2 , wherein the processing aid is a hydrocarbon resin.

11. The compound of claim 2 , further comprising adhesion promoters; biocides; anti-fogging agents; anti-static agents; bonding, blowing and foaming agents; dispersants; fillers and extenders; fire and flame retardants and smoke suppressants; impact modifiers; initiators; lubricants; micas; pigments, colorants and dyes; plasticizers; additional processing aids; release agents; silanes, titanates and zirconates; slip and anti-blocking agents; stabilizers; stearates; ultraviolet light absorbers; viscosity regulators; waxes; or combinations of them.

12. The two-component article of claim 7 , wherein the styrene-containing thermoplastic elastomer is selected from the group consisting of styrene-ethylene-butylene-styrene, styrene-ethylene-propylene-styrene, styrene-ethylene-ethylene/propylene-styrene, styrene-isobutylene-styrene, styrene-butadiene-styrene, styrene-isoprene-styrene, and combinations thereof.

13. The two-component article of claim 7 , wherein the compound further comprises adhesion promoters; biocides; anti-fogging agents; anti-static agents; bonding, blowing and foaming agents; dispersants; fillers and extenders; fire and flame retardants and smoke suppressants; impact modifiers; initiators; lubricants; micas; pigments, colorants and dyes; plasticizers; additional processing aids; release agents; silanes, titanates and zirconates; slip and anti-blocking agents; stabilizers; stearates; ultraviolet light absorbers; viscosity regulators; waxes; or combinations of them.