CN103849073A - EPDM (Ethylene-Propylene-Diene Monomer) sponge material with high foaming ratio and preparation process thereof - Google Patents

Abstract

The invention discloses an EPDM (Ethylene-Propylene-Diene Monomer) sponge material with a high foaming ratio and a preparation process thereof. The EPDM sponge material is prepared from the following components in parts by mass: 100 parts of EPDM, 6 to 10 parts of ZnO, 2 to 4 parts of SA, 1.5 to 2.5 parts of S, 0.4 to 0.8 part of accelerant D, 1.5 to 2.5 parts of accelerant M, 1 to 1.8 parts of accelerant NOBS, 70 to 100 parts of paraffin oil, 10 to 15 parts of foaming agent AC and 10 to 15 parts of foaming agent H. The EPDM sponge material has the beneficial effect that the foaming ratio of the EPDM sponge material is improved by 10 to 12 times.

Description

A kind of high foamability EPDM sponge material and preparation technology thereof

Technical field

EPDM sponge material has excellent chemical stability, good electrical insulation capability, ageing-resistant performance and water resistance.It both can be widely used in the industries such as the sports goods not high to requirement for environmental conditions, all kinds of building and refrigeration, air-conditioning, also can be widely used in the fields such as the automobile component higher to environmental requirement, medicine, military project apparatus.Up to the present, the expansion ratio of domestic and international EPDM sponge material is generally in doubly left and right of 2-6.

Summary of the invention

The invention provides a kind of high foamability EPDM sponge material and preparation technology thereof, its expansion ratio reaches 10 times.

The present invention realizes with following technical scheme: a kind of high foamability EPDM sponge material, and its material composition and mass parts are:

The preparation method of above-mentioned high foamability EPDM sponge material, specific as follows:

------mixing---bin aging---foaming of plasticating that technological process is: coordinate;

Described plasticating adopts mill to plasticate: plasticating temperature between 40-60 ℃, roll spacing: 0.1-0.3mm, the number of times of plasticating: 10-30 time; Described plasticating also can adopt Banbury mixer to plasticate;

Described mixing employing mill mixing: processing condition are: thin-pass roll spacing is 0.1-0.5mm; Feed roller is apart from being 2-10mm, and lower roll spacing is that product requirement is looked in the concrete roll spacing of 2-15mm(), roller temperature is between 40-60 ℃;

One section is mixing: order of addition(of ingredients), and rubber EPDM → whipping agent → ZnO, SA → softening agent → vulkacit D, M, NOBS → sulphur → thin-pass 6-12 park 1-7 days all over lower;

Two-stage mixing: thin-pass, beat triangle bag (clot) 6-12 lower sheet and park 1-7 days;

Three-stage mixing: thin-pass, beat triangle bag (clot) 6-12 lower sheet and park.

Be prefabricated into as required the offset plate of certain size, park;

The condition of parking of described bin aging is: more than normal temperature 8-168 hour; The requirement of bin aging: dry, indoor need are sun-proof, waterproof and dustproof, ventilation condition are good, temperature is higher than 40 ℃;

The processing condition of described sizing material foaming are: pre-curing temperature 100-140 ℃ in warm air, and the time is controlled as 12-16min; Taking-up is parked and is cooled to room temperature, second heat air curing temperature 160-180 ℃, and the time is controlled as 20-40min; After foaming, cut into slices and stamping-out according to shape of product and size.

The invention has the beneficial effects as follows: the expansion ratio of high foamability EPDM sponge material reaches 10-12 doubly.Can be for the preparation of the silicon rubber sponge goods with good insulation properties and ageing-resistant performance.

Embodiment

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

Embodiment 1:

High foamability EPDM sponge material formula:

------mixing---bin aging---foaming of plasticating that technological process is: coordinate;

Plasticate adopt mill plasticate: plasticating temperature between 40-60 ℃, roll spacing: 0.1-0.3mm, the number of times of plasticating: 10-30 time;

Mixing employing mill mixing: processing condition are: thin-pass roll spacing is 0.1-0.5mm; Feed roller is apart from being 2-10mm, and lower roll spacing is 4mm, and roller temperature is between 40-60 ℃;

One section is mixing: order of addition(of ingredients), and rubber EPDM → whipping agent → ZnO, SA → softening agent → vulkacit D, M, NOBS → sulphur → thin-pass 6-12 park 1-7 days all over lower;

Two-stage mixing: thin-pass, beat triangle bag (clot) 6-12 lower sheet and park 1-7 days;

Three-stage mixing: thin-pass, beat triangle bag (clot) 6-12 lower sheet and park.

Be prefabricated into 50 × 50 × 4mm(length × wide × height) left and right sample, park;

The condition of parking of bin aging is: normal temperature is more than 8 hours; The requirement of bin aging: dry, indoor need are sun-proof, waterproof and dustproof, ventilation condition are good, temperature is higher than 40 ℃;

The processing condition of sizing material foaming are: pre-curing temperature 100-140 ℃ in warm air, and the time is controlled as 12-16min; Taking-up is parked and is cooled to room temperature, second heat air curing temperature 160-180 ℃, and the time is controlled as 20-40min.

Gained properties of rubber detected result is in table 1

Table 1

Claims (2)

1. a high foamability EPDM sponge material, its material composition and mass parts are:

2. a preparation method for high foamability EPDM sponge material claimed in claim 1,------mixing---bin aging---foaming of plasticating that specific embodiment is: coordinate;

Described plasticating adopts mill to plasticate: plasticating temperature between 40-60 ℃, roll spacing: 0.1-0.3mm, the number of times of plasticating: 10-30 time; Described plasticating also can adopt Banbury mixer to plasticate;

Described mixing employing mill mixing: processing condition are: thin-pass roll spacing is 0.1-0.5mm; Feed roller is apart from being 2-10mm, and lower roll spacing is 2-15mm, and roller temperature is between 40-60 ℃;

One section is mixing: order of addition(of ingredients), and rubber EPDM → whipping agent → ZnO, SA → softening agent → vulkacit D, M, NOBS → sulphur → thin-pass 6-12, all over lower, park 1-7 days;

Two-stage mixing: thin-pass, beat triangle bag (clot) 6-12 lower sheet, park 1-7 days;

Three-stage mixing: thin-pass, beat triangle bag (clot) 6-12 lower sheet and park;

Be prefabricated into as required offset plate, park;

The condition of parking of described bin aging is: more than normal temperature 8-168 hour; The requirement of bin aging: dry, indoor need are sun-proof, waterproof and dustproof, ventilation condition are good, temperature is higher than 40 ℃;

The processing condition of described sizing material foaming are: pre-curing temperature 100-140 ℃ in warm air, and the time is controlled as 12-16min; Taking-up is parked and is cooled to room temperature, second heat air curing temperature 160-180 ℃, and the time is controlled as 20-40min; After foaming, cut into slices and stamping-out according to shape of product and size.