CN102367305A

CN102367305A - Chloroprene rubber for elbow and preparation method thereof

Info

Publication number: CN102367305A
Application number: CN2011102591638A
Authority: CN
Inventors: 潘海斌; 杨建辉
Original assignee: Wuhu Hetian Automotive Industry Co Ltd
Current assignee: Wuhu Hetian Automotive Industry Co Ltd
Priority date: 2011-09-02
Filing date: 2011-09-02
Publication date: 2012-03-07
Anticipated expiration: 2031-09-02
Also published as: CN102367305B

Abstract

The invention discloses chloroprene rubber for an elbow and a preparation method thereof. The chloroprene rubber for an elbow is prepared from 100 parts by weight of chloroprene rubber CR121, 4 to 6 parts by weight of magnesium oxide, 0.5 to 3 parts by weight of eleaostearic acid, 2 to 8 parts by weight of an antioxidant RD, 1 to 3 parts by weight of an antioxidant 4010NA, 0.5 to 2 parts by weight of an antioxidant RDA, 3 to 10 parts by weight of Rhine wax, 0.5 to 1.5 parts by weight of an antioxidant MB, 1 to 3.5 parts by weight of a lubricant TR121, 10 to 20 parts by weight of a middle/ultrahigh wear-resistant agent N220, 5 to 15 parts by weight of carbon black N660, 5 to 15 parts by weight of white carbon black obtained by a precipitation method, 0.5 to 1.5 parts by weight of a coupling agent Si690, 3 to 8 parts by weight of colza oil, 4 to 12 parts by weight of dibutyl phthalate, 2 to 8 parts by weight of calcium oxide, 3 to 10 parts by weight of zinc oxide obtained by an indirect method, 0.1 to 0.5 parts by weight of an anti-scorching agent CTP, 0.3 to 1 part by weight of sulphur, 0.5 to 1.5 parts by weight of a promoter CBS, and 0.1 to 0.2 parts by weight of a promoter Na-22. The preparation method of the chloroprene rubber for an elbow comprises the following steps of carrying out rubber material plasticizing and mixing of a part of the raw materials adopted a formula according to requirements, adding the other raw materials adopted by the formula into the mixed rubber obtained by the previous step, carrying out mixing, adding a sulfuration system into the mixture obtained by the previous step, and making the mixture with the sulfuration system pass through an open mill 5 to 7 times under the condition of small thickness. A rubber elbow product prepared from the chloroprene rubber for an elbow has the advantages of excellent aging resistance, tearing resistance and dynamic fatigue resistance.

Description

Neoprene latex bend pipe rubber and preparation method thereof

Technical field

The present invention relates to vulcanization of rubber field, be specifically related to a kind of neoprene latex bend pipe rubber and preparation method thereof.

Background technology

Each procedure technology requirement in the course of processing of neoprene latex bend pipe rubber compounding, the requirement of material selection all should be rigorous because our normal natural gum aging require be (70 ℃ * 96h) aging coefficient is 0.98 tensile strength-13%, pulls apart rate-14% hardness+5sh.A; Levelling through prescription rises to aging condition (100 ℃ * 70h) tensile strength-15% are pulled apart rate-16% hardness+3sh.A now.

Summary of the invention

The invention provides a kind of neoprene latex bend pipe rubber and preparation method thereof, the rubber bridge piece product that this rubber compounding is produced has good heat aging property, tear-resistant performance, and anti-dynamic fatigue property is excellent.

The present invention adopts following technical scheme to achieve these goals:

A kind of neoprene latex bend pipe rubber is characterized in that the weight part of its constitutive material is: neoprene latex CR121100, Natural manganese dioxide 4-6, Triple Pressed Stearic Acid 0.5-3, anti-aging agent RD 2-8, antioxidant 4010NA 1-3, anti-aging agent RD A 0.5～2, antioxidant MB 0.5-1.5, Lay mattress wax 3-10, lubricant TR1211-3.5, carbon black N22010-20, carbon black N6605-15, precipitated silica 5-15, coupling agent Si690.5-1.5, rapeseed oil 3-8, dibutylester 4-12, quicklime 2-8, indirect process zinc oxide 3-10, anti-scorching agent CTP 0.1-0.5, sulphur S-800.3-1, accelerator CBS 0.5-1.5, accelerant N a-220.1-0.2.

Described neoprene latex bend pipe rubber is characterized in that the weight part of its constitutive material is: neoprene latex CR121100, Natural manganese dioxide 4, Triple Pressed Stearic Acid 2, anti-aging agent RD 2, antioxidant 4010NA 1.5, anti-aging agent RD A 1, antioxidant MB 1, Lay mattress wax 3, lubricant TR1212, carbon black N22020, carbon black N66015, precipitated silica 10, coupling agent Si691, rapeseed oil 8, dibutylester 10, quicklime 5, indirect process zinc oxide 5, anti-scorching agent CTP 0.3, sulphur S-800.4, accelerator CBS 1, accelerant N a-220.2.

The preparation method of described neoprene latex bend pipe rubber may further comprise the steps:

(1) plasticates: start Banbury mixer, neoprene latex is dropped in the Banbury mixer plasticate, after plasticating 15-25 minute,, begin discharge, park cooling 23-25 hour behind the discharge when temperature reaches 95-105 ℃;

(2) mixing: as above-mentioned cooled broken-(down)rubber to be joined in the Banbury mixer, add Natural manganese dioxide, Triple Pressed Stearic Acid, anti-aging agent class, Lay mattress wax again, after mixing 3-4 minute; After adding quicklime, lubricant TR121, coupling agent, the mixing 2-3 of continuation minute, again the carbon black class is added at twice wherein mixingly, added 2/3 carbon black mixing 2-3 minute earlier; Add residue 1/3 carbon black again; Turned refining 2-3 minute, again with after the rapeseed oil, the abundant mixing 3-4 of dibutylester minute, when temperature reaches 85-90 ℃; The beginning discharge is parked cooling 23-25 hour behind the discharge;

(3) vulcanization system adds: above-mentioned mixing materials is dropped in the mill, add indirect process zinc oxide earlier, vulcanizing agent class, promotor class, scorch retarder class are added in the rubber unvulcanizate again, thin logical 5-7 be all over can obtaining mixing sizing material, the processing temperature of mill≤60 ℃.

Beneficial effect of the present invention:

Ultra carbon black N220 and general purpose furnace black N660 and conventional vulcanization system combined during carbon black and vulcanization system were selected for use in the prescription, had improved the flex fatig resistance and the dynamic fatigue property of cross-linked rubber.

Rubber unvulcanizate of the present invention can substitute the products such as sebific duct, protecting jacket, snubber block that require 70 degree (Shao Shi) X 050s; In the sizing material aging resistance ability superelevation 20～105% of analogous products colleague use,

Concrete advantage is:

1, aterrimus sizing material, the rubber unvulcanizate good fluidity is easy to sulfuration processing, and qualification rate is high;

2, have good comprehensive performances, strong with metal bonding property; Mechanical property, fatigue property, performance such as ageing-resistant are all higher, are fit to the products such as automotive hose, dw of heat-resisting, the anti-ozone of production requirement, Weather-resistant, anti-combustion, oil-proofness.

Embodiment

Used part among the embodiment is weight part.

Embodiment one:

1, starting material are prepared:

Take by weighing neoprene latex CR121100, Natural manganese dioxide 4, Triple Pressed Stearic Acid 2, anti-aging agent RD 2, antioxidant 4010NA 1.5, anti-aging agent RD A 1, Lay mattress wax 3, antioxidant MB 1, lubricant TR1212, the wear-resisting N22020 of middle superelevation, N660 carbon black 15, precipitated silica 10, coupling agent Si691 rapeseed oil 8, dibutylester 10, quicklime 5, indirect process zinc oxide 5, anti-scorching agent CTP 0.3, sulphur 0.4, accelerator CBS 1, accelerant N a-220.2.

2, the preparation method of neoprene latex bend pipe rubber may further comprise the steps:

(2) mixing: as above-mentioned cooled broken-(down)rubber to be joined in the Banbury mixer, add Triple Pressed Stearic Acid, anti-aging agent class, Lay mattress wax again, after mixing 3-4 minute; Add after quicklime, Natural manganese dioxide, lubricant TR121, coupling agent Si69 continue mixing 2-3 minute, again the carbon black class is added at twice wherein mixingly, added 2/3 carbon black mixing 2-3 minute earlier; Add residue 1/3 carbon black again; Turned refining 2-3 minute, again with after the rapeseed oil, the abundant mixing 3-4 of dibutylester minute, when temperature reaches 85-90 ℃; The beginning discharge is parked cooling 24 hours behind the discharge;

(3) vulcanization system adds: above-mentioned mixing materials is dropped in the mill, add indirect process zinc oxide 5 earlier and vulcanizing agent class, promotor class, scorch retarder class are added in the rubber unvulcanizate again, can obtain mixing sizing material thin logical 6 times, the processing temperature of mill≤60 ℃;

Testing data

Bridge piece and common bridge piece performance comparison such as following table with neoprene latex bend pipe rubber production of the present invention:

From table, can find out that its over-all properties of rubber bridge piece that processes with elastomeric material of the present invention is apparently higher than different bridge pieces.

Claims

1. a neoprene latex bend pipe rubber is characterized in that the weight part of its constitutive material is: neoprene latex CR121 100, Natural manganese dioxide 4-6, Triple Pressed Stearic Acid 0.5-3, anti-aging agent RD 2-8, antioxidant 4010NA 1-3, anti-aging agent RD A 0.5 ~ 2, antioxidant MB 0.5-1.5, Lay mattress wax 3-10, lubricant TR121 1-3.5, carbon black N220 10-20, carbon black N660 5-15, precipitated silica 5-15, coupling agent Si69 0.5-1.5, rapeseed oil 3-8, dibutylester 4-12, quicklime 2-8, indirect process zinc oxide 3-10, anti-scorching agent CTP 0.1-0.5, sulphur S-80 0.3-1, accelerator CBS 0.5-1.5, accelerant N a-22 0.1-0.2.

2. neoprene latex bend pipe rubber according to claim 1 is characterized in that the weight part of its constitutive material is: neoprene latex CR121 100, Natural manganese dioxide 4, Triple Pressed Stearic Acid 2, anti-aging agent RD 2, antioxidant 4010NA 1.5, anti-aging agent RD A 1, antioxidant MB 1, Lay mattress wax 3, lubricant TR121 2, carbon black N220 20, carbon black N660 15, precipitated silica 10, coupling agent Si69 1, rapeseed oil 8, dibutylester 10, quicklime 5, indirect process zinc oxide 5, anti-scorching agent CTP 0.3, sulphur S-80 0.4, accelerator CBS 1, accelerant N a-22 0.2.

3. the preparation method of neoprene latex bend pipe rubber as claimed in claim 1 is characterized in that may further comprise the steps:

(2) mixing: as above-mentioned cooled broken-(down)rubber to be joined in the Banbury mixer, add Triple Pressed Stearic Acid, anti-aging agent class, Lay mattress wax again, after mixing 3-4 minute; After adding quicklime, Natural manganese dioxide, lubricant TR121, coupling agent, the mixing 2-3 of continuation minute, again the carbon black class is added at twice wherein mixingly, added 2/3 carbon black mixing 2-3 minute earlier; Add residue 1/3 carbon black again; Turned refining 2-3 minute, again with after the rapeseed oil, the abundant mixing 3-4 of dibutylester minute, when temperature reaches 85-90 ℃; The beginning discharge is parked cooling 23-25 hour behind the discharge;

(3) vulcanization system adds: above-mentioned mixing materials is dropped in the mill, add indirect process zinc oxide 5 earlier and vulcanizing agent class, promotor class, scorch retarder class are added in the rubber unvulcanizate again, thin logical 5-7 be all over can obtaining mixing sizing material, the processing temperature of mill≤60 ℃.