CN102367305B

CN102367305B - Chloroprene rubber for elbow and preparation method thereof

Info

Publication number: CN102367305B
Application number: CN 201110259163
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: 2013-06-05
Anticipated expiration: 2031-09-02
Also published as: CN102367305A

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

Chloroprene rubber for elbow and preparation method thereof

Technical field

The present invention relates to vulcanization of rubber field, be specifically related to a kind of chloroprene rubber for elbow and preparation method thereof.

Background technology

Each procedure technology requirement in the course of processing of chloroprene rubber for elbow formula, the requirement of material selection all should be rigorous, because the aging requirement of our normal natural gums be (70 ℃ * 96h) aging coefficient is 0.98 tensile strength-13%, pulls apart rate-14% hardness+5sh.A; Levelling by formula 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 chloroprene rubber for elbow 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 chloroprene rubber for elbow, the weight part that it is characterized in that its constitutive material is: neoprene latex CR121100, magnesium oxide 4-6, 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, calcium oxide 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 chloroprene rubber for elbow is characterized in that the weight part of its constitutive material is: neoprene latex CR121100, magnesium oxide 4, 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, calcium oxide 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 chloroprene rubber for elbow comprises the following steps:

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

(2) mixing: that above-mentioned cooled broken-(down)rubber is joined in Banbury mixer, add again magnesium oxide, stearic acid, anti-aging agent class, Lay mattress wax, after mixing 3-4 minute, after adding calcium oxide, lubricant TR121, coupling agent, the mixing 2-3 of continuation minute, again the carbon black class is added at twice wherein mixing, first added the 2/3 mixing 2-3 of carbon black minute, add again residue 1/3 carbon black, turned refining 2-3 minute, again with after rapeseed oil, the abundant mixing 3-4 of dibutylester minute, when temperature reached 85-90 ℃, the beginning discharge was parked after discharge cooling 23-25 hour;

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

Beneficial effect of the present invention:

Super carbon black N220 and general purpose furnace black N660 during in formula, carbon black and vulcanization system are selected, and conventional vulcanization system combines, and improved 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) chloroprene rubbers; In the sizing material aging resistance energy 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 over-all properties, strong with metal bonding; Mechanical property, fatigue property, the 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

Part used in embodiment is weight part.

Embodiment one:

1, starting material are prepared:

Take neoprene latex CR121100, magnesium oxide 4, 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, middle super-high wear-resistant N22020, N660 carbon black 15, precipitated silica 10, coupling agent Si691 rapeseed oil 8, dibutylester 10, calcium oxide 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 chloroprene rubber for elbow comprises the following steps:

(2) mixing: that above-mentioned cooled broken-(down)rubber is joined in Banbury mixer, add again stearic acid, anti-aging agent class, Lay mattress wax, after mixing 3-4 minute, add calcium oxide, magnesium oxide, lubricant TR121, coupling agent Si69 to continue after mixing 2-3 minute, again the carbon black class is added at twice wherein mixing, first added the 2/3 mixing 2-3 of carbon black minute, add again residue 1/3 carbon black, turned refining 2-3 minute, again with after rapeseed oil, the abundant mixing 3-4 of dibutylester minute, when temperature reached 85-90 ℃, the beginning discharge was parked after discharge cooling 24 hours;

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

Testing data

Bridge piece and generic connectivity bend pipe performance comparison such as following table with chloroprene rubber for elbow production of the present invention:

Its over-all properties of rubber bridge piece that processes with elastomeric material of the present invention as can be seen from the table is apparently higher than different bridge pieces.

Claims

1. chloroprene rubber for elbow, the weight part that it is characterized in that its constitutive material is: neoprene latex CR121 100, magnesium oxide 4-6, 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, calcium oxide 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. chloroprene rubber for elbow according to claim 1, is characterized in that the weight part of its constitutive material is: neoprene latex CR121 100, magnesium oxide 4, 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, calcium oxide 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.