CN104910466A - Neoprene material - Google Patents

Abstract

The invention discloses a neoprene material composed of the following raw materials, by weight: 1-2 parts of zinc oxide, 0.2-0.6 parts of 8-10% sulfuric acid, 5-8 parts of melamine, 26-30 parts of a 37% formaldehyde solution, 7-10 parts of urea, 0.6-1 parts of p-chlormetaxylenol, 4-7 parts of vinyl carboxylate, 2-3 parts of ammonium trimolybdate, 0.7-2 parts of ascorbic acid, 47-50 parts of attapulgite, 6-10 parts of microcrystalline cellulose, 1-1.2 parts of isopropanol, 3-4 parts of maleic anhydride, 2-3 parts of sulfur, 3-4 parts of an anti-aging agent 688, and 200-230 parts of neoprene S40V. According to the invention, under the crosslinking effect of maleic anhydride, microcrystalline cellulose forms a closer network structure in melamine resin formed by melamine, urea and formaldehyde, such that resin viscosity and tensile deformation resistance are greatly improved, and certain reinforcement and tackification effects are performed in the rubber material. Therefore, flexure cracking resistance, hot air aging resistance and stability of the material are improved.

Description

A kind of chloroprene rubber material

Technical field

The present invention relates generally to rubber materials, particularly relates to a kind of chloroprene rubber material.

Background technology

Chloroprene rubber take chloroprene as main raw material, by homopolymerization or other monomer copolymerization on a small quantity.As tensile strength is high, heat-resisting, fast light, ageing-resistant performance is excellent, oil resistance is all better than natural rubber, styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber.Have stronger flame resistivity and excellent fire retardance, its chemical stability is higher, and water tolerance is good.The shortcoming of chloroprene rubber is electrical insulation capability, and cold tolerance is poor, and rubber is unstable when storing.Chloroprene rubber is of many uses, as being used for making travelling belt and transmission belt, the coating material of electric wire, cable, manufactures the equipment lining of oil resisting rubber hose, packing ring and resistance to chemical attack;

Mierocrystalline cellulose has the chemical structure similar to starch, it is the natural macromolecular material that plant is synthesized by photosynthesis, it is extensively present in plant, in animal and bacterium, the producible Mierocrystalline cellulose of annual nature is up to 1010 ~ 1011 tons, there is the unrivaled degradability of petrochemicals, recyclability and environment friendly, pollution-free to ecotope, without the desirable green resource destroyed, wherein Microcrystalline Cellulose resource has aboundresources, renewable, cost is low, density is low, intensity is high, advantages of environment protection, for can mechanics be improved in elastomeric material, thermal-oxidative aging property.

Summary of the invention

The object of the invention is just to provide a kind of chloroprene rubber material.

The present invention is achieved by the following technical solutions:

A kind of chloroprene rubber material, it is made up of the raw material of following weight parts:

Sulfuric acid 0.2-0.6, the trimeric cyanamide 26-30 of zinc oxide 1-2,8-10%, 37% formaldehyde solution 5-8, urea 7-10, PCMX 0.6-1, vinyl carboxylate 4-7, three ammonium molybdate 2-3, xitix 0.7-2, attapulgite 47-50, Microcrystalline Cellulose 6-10, Virahol 1-1.2, maleic anhydride 3-4, sulphur 2-3, anti-aging agent 688 3-4, chloroprene rubber S40V 200-230.

2, a preparation method for chloroprene rubber material as claimed in claim 1, is characterized in that comprising the following steps:

(1) joined by Microcrystalline Cellulose in 2-3 times of water, add Virahol, maleic anhydride, add the sulfuric acid of 8-10% after stirring, in the water-bath of 50-60 DEG C, react 6-7h, regulate pH to neutral, decompression steams moisture and Virahol, obtains anhydride cellulose;

(2) trimeric cyanamide, urea, 37% formaldehyde solution are mixed to join in reactor, when being heated to 70-80 DEG C, sealed reaction 10-15 hour, pass into the 0.5-1% trolamine aqueous solution, be cooled to 60-65 DEG C, add anhydride cellulose, natural reaction 160-180 minute, regulate PH to 7-7.5, distillation and concentration, obtains anhydride cellulose resin;

(3) by above-mentioned anhydride cellulose resin, chloroprene rubber S40V mixes, the roll spacing regulating mill is 1mm, thin-pass bag roller is plasticated 1min on a mill until, add attapulgite, refining 2-3min is opened under roll spacing is 2mm, add PCMX, vinyl carboxylate, three ammonium molybdates, xitix, anti-aging agent 688, begin to pratise 6-10min under 3mm roll spacing, add each raw material of residue, play triangle bag 5-6 time, slice, park 6-7 hour, send into vulcanizing press sulfidization molding, curing temperature 150-160 DEG C, sulfide stress 8-10Mpa, curing time 12-15min.

Advantage of the present invention is:

The present invention is by the crosslinked action of Microcrystalline Cellulose by maleic anhydride, more close network structure is formed in the melamine resin that trimeric cyanamide, urea and formaldehyde are formed, well improve viscosity and the opposing tensile deformation performance of resin, in elastomeric material, play certain reinforcement and viscosifying action, improve and anti-deflect be full of cracks, thermal aging property and stability.

Embodiment

Embodiment 1:

A kind of chloroprene rubber material, is characterized in that what it was made up of the raw material of following weight parts:

The sulfuric acid 0.6 of zinc oxide 1,8-10%, trimeric cyanamide 30,37% formaldehyde solution 8, urea 10, PCMX 0.6, vinyl carboxylate 7, three ammonium molybdate 2, xitix 0.7, attapulgite 50, Microcrystalline Cellulose 10, Virahol 1.2, maleic anhydride 3, sulphur 2, anti-aging agent 688 3, chloroprene rubber S40V 230.

A preparation method for chloroprene rubber material, comprises the following steps:

(1) joined by Microcrystalline Cellulose in 2 times of water, add Virahol, maleic anhydride, add the sulfuric acid of 10% after stirring, in the water-bath of 60 DEG C, react 7h, regulate pH to neutral, decompression steams moisture and Virahol, obtains anhydride cellulose;

(2) trimeric cyanamide, urea, 37% formaldehyde solution are mixed to join in reactor, when being heated to 80 DEG C, sealed reaction 15 hours, pass into the 0.5% trolamine aqueous solution, be cooled to 65 DEG C, add anhydride cellulose, natural reaction 180 minutes, regulate PH to 7.5, distillation and concentration, obtains anhydride cellulose resin;

(3) above-mentioned anhydride cellulose resin, chloroprene rubber S40V are mixed, the roll spacing regulating mill is 1mm, thin-pass bag roller is plasticated 1min on a mill until, add attapulgite, refining 2min is opened under roll spacing is 2mm, add PCMX, vinyl carboxylate, three ammonium molybdates, xitix, anti-aging agent 688, begin to pratise 10min under 3mm roll spacing, add each raw material of residue, play triangle bag 6 times, slice, park 7 hours, send into vulcanizing press sulfidization molding, curing temperature 160 DEG C, sulfide stress 10Mpa, curing time 15min.

Performance test:

Tensile strength: 17.8MPa;

Elongation at break: 393%;

Oil-proofness: 20# machine oil 100 DEG C × 70h, elongation at break conservation rate 73.5%, tensile strength retention 73.1%;

Resistance to ozone: 25 DEG C, 24h, ozone concn 0.025%, without cracking;

Ageing-resistant: 120 DEG C, 150h, tensile strength retention 89.4%, elongation at break conservation rate 78.6%;

Cold-resistant experiment: (-40 DEG C, 4h): flawless.

Claims (2)

1. a chloroprene rubber material, is characterized in that what it was made up of the raw material of following weight parts:

Sulfuric acid 0.2-0.6, the trimeric cyanamide 26-30 of zinc oxide 1-2,8-10%, 37% formaldehyde solution 5-8, urea 7-10, PCMX 0.6-1, vinyl carboxylate 4-7, three ammonium molybdate 2-3, xitix 0.7-2, attapulgite 47-50, Microcrystalline Cellulose 6-10, Virahol 1-1.2, maleic anhydride 3-4, sulphur 2-3, anti-aging agent 688 3-4, chloroprene rubber S40V 200-230.

2. a preparation method for chloroprene rubber material as claimed in claim 1, is characterized in that comprising the following steps:

(1) joined by Microcrystalline Cellulose in 2-3 times of water, add Virahol, maleic anhydride, add the sulfuric acid of 8-10% after stirring, in the water-bath of 50-60 DEG C, react 6-7h, regulate pH to neutral, decompression steams moisture and Virahol, obtains anhydride cellulose;

(2) trimeric cyanamide, urea, 37% formaldehyde solution are mixed to join in reactor, when being heated to 70-80 DEG C, sealed reaction 10-15 hour, pass into the 0.5-1% trolamine aqueous solution, be cooled to 60-65 DEG C, add anhydride cellulose, natural reaction 160-180 minute, regulate PH to 7-7.5, distillation and concentration, obtains anhydride cellulose resin;

(3) by above-mentioned anhydride cellulose resin, chloroprene rubber S40V mixes, the roll spacing regulating mill is 1mm, thin-pass bag roller is plasticated 1min on a mill until, add attapulgite, refining 2-3min is opened under roll spacing is 2mm, add PCMX, vinyl carboxylate, three ammonium molybdates, xitix, anti-aging agent 688, begin to pratise 6-10min under 3mm roll spacing, add each raw material of residue, play triangle bag 5-6 time, slice, park 6-7 hour, send into vulcanizing press sulfidization molding, curing temperature 150-160 DEG C, sulfide stress 8-10Mpa, curing time 12-15min.