CN101747576B - Thermoplastic elastomer composition for bonding PA and preparation method thereof - Google Patents

Abstract

The invention relates to a thermoplastic elastomer composition for bonding PA and a preparation method thereof. The composition is prepared with the following raw materials by weight percentage: 20-30 percent of maleic anhydride grafted POE (POE-g-MAH), 5-15 percent of EVA, 5-20 percent of SEBS., 10-20 percent of extending oil, 10-30 percent of PA6., 2-5 percent of SEBS-g-MAH., 0-20 percent of activated calcium carbonate and 0.1-0.5 percent of antioxidant. The preparation method comprises the following steps: weighing the raw materials according to the weight ratio; mixing the SEBS and petrolatum oil in a high-speed mixer, adding other raw materials, mixing and discharging; and extruding the well mixed raw materials for granulation. The thermoplastic elastomer prepared in the invention not only can be well bonded with PA and PA reinforced materials, but also can be used for producing sheathes of the handles of electric tools, household products and the like through hardness adjustment according to the requirements of customers.

Description

A kind of composition for thermoplastic elastomer that is used for bonding PA and preparation method thereof

Technical field

The present invention relates to a kind of composition for thermoplastic elastomer that is used for bonding PA and preparation method thereof, this material and PA and PA strongthener have excellent bond performance, can directly carry out injection moulding, belong to the thermoplastic elastomer technical field.

Background technology

The TPE modifying material that can be used for bonding PA in the market mainly exists bonding not firm, the shortcoming that price is high, and therefore researching and developing this kind elastomerics has very big market potential.Adopt the prepared TPE compsn of this kind method not only higher bonding strength to be arranged, and have the hardness controllability with PA.This kind TPE is mainly used in power tool and when expects fields such as sheath material with the handle coating of instrument.

Summary of the invention

The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence a kind of composition for thermoplastic elastomer that is used for bonding PA and preparation method thereof to be provided.

The object of the invention can be realized through following technical scheme: a kind of composition for thermoplastic elastomer that is used for bonding PA, it is characterized in that, and process by following materials of weight proportions:

POE-g-MAH?20-30％，

EVA?5-15％，

SEBS?5-20％，

Extending oil 10-20%,

SEBS-g-MAH?2-5％，

PA6?10-30％，

Treated carbonates 0-20%,

Oxidation inhibitor 0.1-0.5%.

The percentage of grafting of described POE-g-MAH is 1.5%.

The VA content of described EVA is 30%.

Described SEBS is a powdery, hydrogenation degree＞95%.

Described extending oil is white oil or NO.

Described maleic anhydride graft SEBS (SEBS-g-MAH), percentage of grafting are 5%.

Described PA6 viscosity is 2.4-3.8Pa.S.

Described treated carbonates is 2000 orders, and is commercially available.

Described oxidation inhibitor is that Hinered phenols antioxidant and phosphite ester kind antioxidant are composite, and preferred antioxidant 1010 and oxidation inhibitor 168 are composite.

A kind of preparation method who is used for the composition for thermoplastic elastomer of bonding PA is characterized in that, this method comprises following process step:

(1) weighs raw material by weight ratio: POE-g-MAH 20-30%, EVA 5-15%, SEBS 5-20%, extending oil 10-20%, SEBS-g-MAH 2-5%, PA6 10-30%, treated carbonates 0-20%, oxidation inhibitor 0.1-0.5%;

(2) earlier SEBS and white oil were put into high-speed mixer and mixing 3-5 minute, added other raw materials mix then 3-5 minute, discharging;

(3) raw materials mixed is put into screw rod machine extruding pelletization, the rotating speed of screw rod machine is 180-600 rev/min, and temperature is 200-230 ℃.

Compared with prior art, the TPE bonding PA material of the inventive method preparation not only can be regulated hardness, and has advantages of good caking property with PA and strongthener thereof, has a extensive future.

Embodiment

Below in conjunction with embodiment, the present invention is done further explain.

Embodiment 1～2

Embodiment 1～2 proportioning (weight %) is seen table 1.

Table 1

Material name	Embodiment 1	Embodiment 2
			POE-g-MAH	25	20
EVA	10	8
			SEBS	10	13
NO	15	22

PA6	24.7	21.7
			SEBS-g-AMH	5	5
Lime carbonate	10	10
			1010/168(1∶1)	0.3	0.3

All components is put into SEBS and NO high-speed mixer and mixing 3-5 minute earlier; Added other raw materials mix then 3-5 minute; Processing temperature is being respectively 200,210,220,225,225,225,225,220,215 ℃, and the screw rod revolution is at 300 rev/mins.

To the composition for thermoplastic elastomer sample that is used for bonding PA 1 and sample 2 of embodiment 1 and embodiment 2 gained, mechanical property is tested with ASTM.

Sample 1 contrasts like table 2 with sample 2 performances.

Table 2

Test event	Sample 1	Sample 2
			Tensile strength MPa	3.8	4.1
Elongation at break %	＞500	＞500
			Melt flow rate(MFR) g/10min	15	21
Shore hardness A	75	62
			Bond effect	Good	Good

Claims (8)

1. a composition for thermoplastic elastomer that is used for bonding PA is characterized in that, is processed by following materials of weight proportions:

POE-g-MAH 20-30％，

EVA 5-15％，

SEBS 5-20％，

White oil 10-20%,

SEBS-g-MAH 2-5％，

PA6 10-30％，

Treated carbonates 0-20%,

Oxidation inhibitor 0.1-0.5%;

The preparation method who is used for the composition for thermoplastic elastomer of bonding PA comprises following process step:

(1) takes by weighing raw material by weight ratio: POE-g-MAH 20-30%, EVA 5-15%, SEBS 5-20%, white oil 10-20%, SEBS-g-MAH 2-5%, PA6 10-30%, treated carbonates 0-20%, oxidation inhibitor 0.1-0.5%;

(2) earlier SEBS and white oil were put into high-speed mixer and mixing 3-5 minute, added other raw materials mix then 3-5 minute, discharging;

(3) raw materials mixed is put into screw rod machine extruding pelletization, the rotating speed of screw rod machine is 180-600 rev/min, and temperature is 200-230 ℃.

2. a kind of composition for thermoplastic elastomer that is used for bonding PA according to claim 1 is characterized in that the percentage of grafting of described POE-g-MAH is 1.5%.

3. a kind of composition for thermoplastic elastomer that is used for bonding PA according to claim 1 is characterized in that the VA content of described EVA is 30%.

4. a kind of composition for thermoplastic elastomer that is used for bonding PA according to claim 1 is characterized in that described SEBS is a powdery, hydrogenation degree＞95%.

5. a kind of composition for thermoplastic elastomer that is used for bonding PA according to claim 1 is characterized in that the percentage of grafting of described SEBS-g-MAH is 5%.

6. a kind of composition for thermoplastic elastomer that is used for bonding PA according to claim 1 is characterized in that described treated carbonates is 2000 orders, and is commercially available.

7. a kind of composition for thermoplastic elastomer that is used for bonding PA according to claim 1 is characterized in that, described oxidation inhibitor is that Hinered phenols antioxidant and phosphite ester kind antioxidant are composite.

8. a preparation method who is used for the composition for thermoplastic elastomer of bonding PA according to claim 1 is characterized in that, this method comprises following process step:

(1) takes by weighing raw material by weight ratio: POE-g-MAH 20-30%, EVA 5-15%, SEBS 5-20%, white oil 10-20%, SEBS-g-MAH 2-5%, PA6 10-30%, treated carbonates 0-20%, oxidation inhibitor 0.1-0.5%;

(2) earlier SEBS and white oil were put into high-speed mixer and mixing 3-5 minute, added other raw materials mix then 3-5 minute, discharging;

(3) raw materials mixed is put into screw rod machine extruding pelletization, the rotating speed of screw rod machine is 180-600 rev/min, and temperature is 200-230 ℃.