CN102268151A - Chloroprene mixing rubber preparation method through backward feed one-step mixing - Google Patents

Abstract

The invention discloses a chloroprene mixing rubber preparation method through a backward feed one-step mixing, and a formula and a preparation technology thereof. A technical scheme of one-step mixing is employed in the invention by simultaneously adding a vulcanizing agent, chloroprene rubber and other cooperative auxiliaries into an internal mixer for mixing, so as to overcome problems and insufficiencies of prior art, such as waste of time and labor, low efficiency, high costs and uneven quality. According to the chloroprene mixing rubber preparation method through the backward feed one-step mixing provided by the invention, purposes of reducing mixing time, increasing mixing efficiency, lowering man-hour cost and raising quality of mixing rubber in the mixing preparation of the chloroprene mixing rubber are realized through the backward feed one-step mixing.

Description

The mixing preparation method of reverse reinforced single stage method of neoprene mixing of rubber

Technical field

The present invention relates to a kind of preparation method of neoprene mixing of rubber, specifically be meant the mixing preparation method of reverse reinforced single stage method of a kind of neoprene mixing of rubber that is used for mixing preparation neoprene mixing of rubber.

Background technology

The neoprene mixing of rubber since its special vulcanization system (metal oxide vulcanization) to play the sulphur temperature low, easy incipient scorch, and when high temperature easy roll banding, so its mixing preparation technology compares with other elastomeric materials and is difficult to control.The neoprene mixing of rubber of prior art adopts the mixing and forward reinforced single stage method of two step method mixing, wherein, two step method is mixing to be, earlier with the mixing master batch of making of rubber, carbon black, filler, oil plant and other auxiliary agent, carries out the mixing adding vulcanizing agent second time again after parking for some time.The mixing shortcoming of two step method is that mixing time is long, and efficient is low, and can produce mixing inequality, the problem that mix quality is bad because of vulcanizing agent adhesion rubber mixing machine roller; Forward feeding in raw material, single stage method is mixing to be, earlier rubber, carbon black, filler, oil plant and other auxiliary agent are carried out mixing finishing, and then the continuation of adding vulcanizing agent is mixing, promptly, vulcanizing agent joined at last continue in the glue stuff compounding of having finished already mixing, the shortcoming of this method is, because the time that vulcanizing agent adds is shorter, mixing insufficient, disperse inhomogeneous, and prolong the mixing time of vulcanizing agent, make sizing material face the hidden danger of incipient scorch again, and total mixing time is also long; Therefore, prior art exist time-consumingly take a lot of work, efficient is low, cost is high, the inhomogenous problems and shortcomings of quality.

Summary of the invention

Problems and shortcomings at above-mentioned prior art existence, the present invention's employing adds Banbury mixer simultaneously with vulcanizing agent and chloroprene rubber and other compounding aid and carries out the mixing reverse reinforced mixing technical scheme of single stage method, a kind of mixing preparation method of reverse reinforced single stage method of neoprene mixing of rubber is provided, is intended to make the mixing preparation of neoprene mixing of rubber reach the purpose that shortens mixing time, raising melting efficiency, reduction time cost, improves the glue stuff compounding quality by reverse reinforced single stage method is mixing.

The object of the present invention is achieved like this: a kind of mixing preparation method of reverse reinforced single stage method of neoprene mixing of rubber, comprise prescription and preparation technology, wherein:

Described prescription is,

Rubber raw materials: chloroprene rubber, 34-64%;

Promoting agent: stearic acid, 0.4-0.8%;

Anti-aging agent: Ursol D, 0.7-1%;

Vulcanizing agent: light magnesium oxide, 2-2.5%; Zinc oxide, 2.2-3%;

Lubricant: paraffin, 0.6-1%; Low molecular weight polyethylene, 1.5-1.7%;

Strengthening agent: extrude carbon black soon, 10-20%; Semi-reinforcing hydrocarbon black, 10-15%;

Softening agent: dioctyl phthalate (DOP), 7-10%;

Promotor: tetramethyl-thiuram disulfide, 0.3-0.5%; The ethylene thiocarbamide, 0.3-0.5%;

Weighting agent: light calcium carbonate, 1-10%;

The prescription unit is weight percentage;

Described preparation technology is mixing;

One, mixer mixing:

Rubber raw materials, promoting agent, anti-aging agent, vulcanizing agent, lubricant, promotor are dropped in the Banbury mixer simultaneously, shut the Banbury mixer charging door after, the last subsidiary engine pipeline by Banbury mixer adds strengthening agent, weighting agent and softening agent;

Banbury mixer water flowing cooling, control Banbury mixer working spaces temperature＜65 ℃, starts mixer mixing, mixing time spent 180-240 second by rotating speed: 25-35 rev/min; Afterwards, Banbury mixer working spaces temperature is controlled at 90-95 ℃, the binder removal discharging obtains rubber unvulcanizate;

Two, mill thin-pass slice:

Rubber unvulcanizate is moved to thin-pass kneading in the mill, the mill roll spacing transfers to the 1-2 millimeter, control roller temperature＜60 ℃, beat triangle bag thin-pass mixing three times, afterwards, roll spacing is transferred to 5 millimeters slices, sheet stock is by the separant groove, folding leaving standstill left standstill 4 hours-24 hours after the surface adhesion separant, promptly obtained the neoprene mixing of rubber; Described separant is Zinic stearas or fatty acid soaps.

Principle of work and beneficial effect

To carry out a going on foot property mixing because vulcanizing agent and chloroprene rubber and other compounding aid are added Banbury mixer simultaneously, so be referred to as reverse reinforced one-step melting method; Obtain longer mixing time owing to vulcanizing agent added in mixing early stage, make mixing more full and uniform of vulcanizing agent, guaranteed the consistence of neoprene mixing of rubber quality; Owing to need not add vulcanizing agent in mixing stage casing, with respect to the mixing mixing time that can shorten of the two step method of prior art more than 50%, with respect to the forward reinforced mixing mixing time that can shorten of single stage method of prior art more than 20%, and avoided the hidden danger of burnt material, melting efficiency is significantly improved, and production capacity promotes significantly; Because mixing time is short, the corresponding reduction of dump temperature, processing safety significantly improves; Dump temperature reduces, and the roll banding of sizing material improves.

Above-mentioned, the present invention's employing adds Banbury mixer simultaneously with vulcanizing agent and chloroprene rubber and other compounding aid and carries out the mixing reverse reinforced mixing technical scheme of single stage method, overcome prior art exist time-consumingly take a lot of work, efficient is low, cost is high, the inhomogenous problems and shortcomings of quality, the mixing preparation method of reverse reinforced single stage method of a kind of neoprene mixing of rubber that is provided makes the mixing preparation of neoprene mixing of rubber reach the purpose that shortens mixing time, raising melting efficiency, reduction time cost, improves the glue stuff compounding quality by reverse reinforced single stage method is mixing.

The embodiment explanation

Below be described in further detail by the mixing preparation method of reverse reinforced single stage method of specific embodiment neoprene mixing of rubber of the present invention, the those skilled in the art can make neoprene mixing of rubber material with reference to prescription and the preparation method of embodiment, but should not be construed as any limitation of the invention.

Embodiment

Embodiment one

The name of an article: A type neoprene mixing of rubber material

Prescription: the prescription unit is weight percentage;

Rubber raw materials: chloroprene rubber, 64%;

Promoting agent: stearic acid, 0.4%;

Anti-aging agent: Ursol D, 0.7%;

Vulcanizing agent: light magnesium oxide, 2%; Zinc oxide, 2.2%;

Lubricant: paraffin, 0.6%; Low molecular weight polyethylene, 1.5%;

Strengthening agent: extrude carbon black soon, 10%; Semi-reinforcing hydrocarbon black, 10%;

Softening agent: dioctyl phthalate (DOP), 7%;

Promotor: tetramethyl-thiuram disulfide, 0.3%; The ethylene thiocarbamide, 0.3%;

Weighting agent: light calcium carbonate, 1%;

Preparation:

Preparation condition, equipment

Ambient pressure a: normal atmosphere;

Envrionment temperature: room temperature;

Preparation equipment: mill in 16 o'clock, 90L adding pressure type Banbury mixer;

Preparation technology: mixing;

One, mixer mixing:

Rubber raw materials, promoting agent, anti-aging agent, vulcanizing agent, lubricant, promotor are dropped in the Banbury mixer simultaneously, shut the Banbury mixer charging door after, the last subsidiary engine pipeline by Banbury mixer adds strengthening agent, weighting agent and softening agent;

Banbury mixer water flowing cooling, control Banbury mixer working spaces temperature＜65 ℃, starts mixer mixing, mixing time spent 180-240 second by rotating speed: 25-35 rev/min; Afterwards, Banbury mixer working spaces temperature is controlled at 90-95 ℃, the binder removal discharging obtains rubber unvulcanizate;

Two, mill thin-pass slice:

Rubber unvulcanizate is moved to thin-pass kneading in the mill, the mill roll spacing transfers to the 1-2 millimeter, control roller temperature＜60 ℃, beat triangle bag thin-pass mixing three times, afterwards, roll spacing is transferred to 5 millimeters slices, sheet stock is by the separant groove, folding leaving standstill left standstill 4 hours-24 hours after the surface adhesion separant, promptly obtained the neoprene mixing of rubber; Described separant is Zinic stearas or fatty acid soaps.

Embodiment two

The name of an article: Type B neoprene mixing of rubber material

Prescription: the prescription unit is weight percentage;

Rubber raw materials: chloroprene rubber, 34%;

Promoting agent: stearic acid, 0.8%;

Anti-aging agent: Ursol D, 1%;

Vulcanizing agent: light magnesium oxide, 2.5%; Zinc oxide, 3%;

Lubricant: paraffin, 1%; Low molecular weight polyethylene, 1.7%;

Strengthening agent: extrude carbon black soon, 20%; Semi-reinforcing hydrocarbon black, 15%;

Softening agent: dioctyl phthalate (DOP), 10%;

Promotor: tetramethyl-thiuram disulfide, 0.5%; The ethylene thiocarbamide, 0.5%;

Weighting agent: light calcium carbonate, 10%;

Preparation:

Preparation condition, equipment

Ambient pressure a: normal atmosphere;

Envrionment temperature: room temperature;

Preparation equipment: mill in 16 o'clock, 90L adding pressure type Banbury mixer;

Preparation technology: mixing;

One, mixer mixing:

Rubber raw materials, promoting agent, anti-aging agent, vulcanizing agent, lubricant, promotor are dropped in the Banbury mixer simultaneously, shut the Banbury mixer charging door after, the last subsidiary engine pipeline by Banbury mixer adds strengthening agent, weighting agent and softening agent;

Banbury mixer water flowing cooling, control Banbury mixer working spaces temperature＜65 ℃, starts mixer mixing, mixing time spent 180-240 second by rotating speed: 25-35 rev/min; Afterwards, Banbury mixer working spaces temperature is controlled at 90-95 ℃, the binder removal discharging obtains rubber unvulcanizate;

Two, mill thin-pass slice:

Rubber unvulcanizate is moved to thin-pass kneading in the mill, the mill roll spacing transfers to the 1-2 millimeter, control roller temperature＜60 ℃, beat triangle bag thin-pass mixing three times, afterwards, roll spacing is transferred to 5 millimeters slices, sheet stock is by the separant groove, folding leaving standstill left standstill 4 hours-24 hours after the surface adhesion separant, promptly obtained the neoprene mixing of rubber; Described separant is Zinic stearas or fatty acid soaps.

Claims (1)

1. the mixing preparation method of reverse reinforced single stage method of a neoprene mixing of rubber is characterized in that: comprise prescription and preparation technology, described prescription is,

Rubber raw materials: chloroprene rubber, 34-64%;

Promoting agent: stearic acid, 0.4-0.8%;

Anti-aging agent: Ursol D, 0.7-1%;

Vulcanizing agent: light magnesium oxide, 2-2.5%; Zinc oxide, 2.2-3%;

Lubricant: paraffin, 0.6-1%; Low molecular weight polyethylene, 1.5-1.7%;

Strengthening agent: extrude carbon black soon, 10-20%; Semi-reinforcing hydrocarbon black, 10-15%;

Softening agent: dioctyl phthalate (DOP), 7-10%;

Promotor: tetramethyl-thiuram disulfide, 0.3-0.5%; The ethylene thiocarbamide, 0.3-0.5%;

Weighting agent: light calcium carbonate, 1-10%;

The prescription unit is weight percentage;

Described preparation technology is mixing;

One, mixer mixing:

Rubber raw materials, promoting agent, anti-aging agent, vulcanizing agent, lubricant, promotor are dropped in the Banbury mixer simultaneously, shut the Banbury mixer charging door after, the last subsidiary engine pipeline by Banbury mixer adds strengthening agent, weighting agent and softening agent;

Banbury mixer water flowing cooling, control Banbury mixer working spaces temperature＜65 ℃, starts mixer mixing, mixing time spent 180-240 second by rotating speed: 25-35 rev/min; Afterwards, Banbury mixer working spaces temperature is controlled at 90-95 ℃, the binder removal discharging obtains rubber unvulcanizate;

Two, mill thin-pass slice:

Rubber unvulcanizate is moved to thin-pass kneading in the mill, the mill roll spacing transfers to the 1-2 millimeter, control roller temperature＜60 ℃, beat triangle bag thin-pass mixing three times, afterwards, roll spacing is transferred to 5 millimeters slices, sheet stock is by the separant groove, folding leaving standstill left standstill 4 hours-24 hours after the surface adhesion separant, promptly obtained the neoprene mixing of rubber; Described separant is Zinic stearas or fatty acid soaps.