CN105694243A - Rubber cover material for boiler - Google Patents

Abstract

The invention discloses a rubber cover material for a boiler, comprising the following materials according to parts by weight: 2-3 parts of a vulcanizing agent PM, 430-500 parts of ethylene propylene diene monomer 4045m, 10-13 parts of microcrystalline cellulose, 2-3 parts of isopropanol, 5-7 parts of maleic anhydride, 0.4-1 part of 8-10% sulfuric acid, 60-70 parts of phenol, 61-70 parts of 37% formaldehyde solution, 0.6-0.8 part of barium hydroxide, 3-5 parts of polyvinyl chloride paste resin, 0.6-1 part of chlorhexidine, 1-2 parts of tert-butylhydroquinone, 1-2 parts of water-soluble wool fat, 1.2-3 parts of beta-hydroxyalkylamide, 65-70 parts of diatomaceous earth, 2-3 parts of 8-hydroxyquinoline, and 2-4 parts of anti-aging agent CMA. The compatibility of the materials can be improved, the stability of a product can be promoted, resin strength and tensile resistance can be well improved, the rubber cover material is given certain reinforcement, and flexural cracking resistance and hot air aging property can be improved.

Description

A kind of boiler rubber sheath material

Technical field

The invention mainly relates to rubber materials, particularly relate to a kind of boiler rubber sheath material。

Background technology

Ethylene propylene diene rubber is the copolymer of ethylene, propylene and a small amount of non-conjugated diene hydrocarbon, it it is the one of EP rubbers, because its main chain is made up of chemically stable saturated hydrocarbons, only containing unsaturated double-bond in side chain, therefore its resistance to ozone, the ageing-resistant performance such as heat-resisting, weather-proof are excellent, can be widely used for the fields such as automobile component, building water-proof material, electric wire and cable jacket, heat-resistant rubber hose, adhesive tape, automotive sealant；

Cellulose has the chemical constitution similar to starch, it it is the natural macromolecular material that synthesized by photosynthesis of plant, it is widely present in plant, in animal and antibacterial, the producible cellulose of annual nature is up to 1010～1011 tons, there is the unrivaled degradability of petrochemicals, recyclability and environment friendly, it is that ecological environment is pollution-free, 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 elastomeric material can improve mechanics, thermal-oxidative aging property。

Summary of the invention

The object of the invention is just to provide a kind of boiler rubber sheath material。

The present invention is achieved by the following technical solutions:

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

Vulcanizing agent PM2-3, ethylene propylene diene rubber 4045m430-500, microcrystalline Cellulose 10-13, isopropanol 2-3, the sulphuric acid 0.4-1 of maleic anhydride 5-7,8-10%, phenol 60-70,37% formalin 61-70, barium hydroxide 0.6-0.8, PVC paste resin 3-5, chlorhexidine 0.6-1, the tert-butyl group are to biphenol 1-2, water solublity lanoline 1-2, beta-hydroxy alkylamide 1.2-3, kieselguhr 65-70, oxine 2-3, age resistor CMA2-4。

The preparation method of a kind of boiler rubber sheath material, comprises the following steps:

(1) being joined by microcrystalline Cellulose in 2-3 times of water, add isopropanol, maleic anhydride, be stirring evenly and then adding into the sulphuric acid of 8-10%, react 6-7h in the water-bath of 50-60 DEG C, regulate pH to neutral, decompression steams moisture and isopropanol, obtains anhydride cellulose；

(2) water solublity lanoline is joined in 10-20 times of water, be stirring evenly and then adding into PVC paste resin, at 60-65 DEG C insulated and stirred 3-5 minute, cooling, obtain cooling resin liquid；

(3) join after above-mentioned phenol being added heat fusing in reactor, add barium hydroxide, at 70-75 DEG C insulated and stirred 20-30 minute, add 37% formalin, anhydride cellulose, keep boiling reaction 1-2 hour, add above-mentioned cooling resin liquid, stir, make temperature be reduced to 60-65 DEG C, decompression dehydration, cooling discharging, obtains anhydride cellulose resin；

(4) by above-mentioned anhydride cellulose resin, ethylene propylene diene rubber 4045m mixing, send into refining glue 10-15 time in banbury, add kieselguhr, chlorhexidine, the tert-butyl group to biphenol, oxine, beta-hydroxy alkylamide, banburying 3-4 minute at 90-100 DEG C, cooling discharging, park 20-24 hour, add and remain each raw material, send in mill, play triangle bag thin logical, bottom sheet, it is rolled into predetermined thickness, adopting vulcanizing press to carry out sulfidization molding, curing temperature is 135-140 DEG C, sulfide stress 9.5-10Mpa, cure time 15-20min。

The invention have the advantage that

The present invention is by the microcrystalline Cellulose crosslinked action by maleic anhydride, the phenolic resin that phenol and formaldehyde are formed forms more close network structure, water solublity lanoline is adopted to mix as coolant with PVC paste resin, can effectively improve the compatibility of each material, promote that finished product has good stability, well improve intensity and the opposing tensile deformation performance of resin, elastomeric material plays certain strengthening action, improve anti-deflecting and chap and thermal aging property。

Detailed description of the invention

Embodiment 1:

A kind of boiler rubber sheath material, it is characterised in that it is made up of the raw material of following weight parts:

Vulcanizing agent PM2, ethylene propylene diene rubber 4045m500, microcrystalline Cellulose 13, isopropanol 3, the sulphuric acid 0.4 of maleic anhydride 5,10%, phenol 70,37% formalin 61, barium hydroxide 0.8, PVC paste resin 5, chlorhexidine 0.6, the tert-butyl group are to biphenol 1, water solublity lanoline 2, beta-hydroxy alkylamide 1.2, kieselguhr 70, oxine 2, age resistor CMA2。

The preparation method of a kind of boiler rubber sheath material, comprises the following steps:

(1) being joined by microcrystalline Cellulose in 2 times of water, add isopropanol, maleic anhydride, be stirring evenly and then adding into the sulphuric acid of 10%, react 6h in the water-bath of 60 DEG C, regulate pH to neutral, decompression steams moisture and isopropanol, obtains anhydride cellulose；

(2) water solublity lanoline is joined in 20 times of water, be stirring evenly and then adding into PVC paste resin, insulated and stirred 3 minutes at 60-65 DEG C, cooling, obtain cooling resin liquid；

(3) join after above-mentioned phenol being added heat fusing in reactor, add barium hydroxide, insulated and stirred 20 minutes at 75 DEG C, add 37% formalin, anhydride cellulose, keep boiling reaction 1-2 hour, add above-mentioned cooling resin liquid, stir, make temperature be reduced to 65 DEG C, decompression dehydration, cooling discharging, obtains anhydride cellulose resin；

(4) by above-mentioned anhydride cellulose resin, ethylene propylene diene rubber 4045m mixing, send into refining glue 15 times in banbury, add kieselguhr, chlorhexidine, the tert-butyl group to biphenol, oxine, beta-hydroxy alkylamide, banburying 4 minutes at 100 DEG C, cooling discharging, park 24 hours, add and remain each raw material, send in mill, play triangle bag thin logical, bottom sheet, it is rolled into predetermined thickness, adopting vulcanizing press to carry out sulfidization molding, curing temperature is 140 DEG C, sulfide stress 9.5Mpa, cure time 15min。

Performance test:

Breaking strength: 14.6Mpa；

Elongation at break: 313%；

150 DEG C × 24h × 25% compression set: 10.3%；

500000 pressure 7Mpa room temperature long duration tests: pass through；

500000 pressure 7Mpa high temperature endurance test: pass through；

150 DEG C × 70h air oven aging test:

Breaking strength reduction rate: 4.7%, elongation at break reduction rate: 7.4%。

Claims (2)

1. a boiler rubber sheath material, it is characterised in that it is made up of the raw material of following weight parts:

Vulcanizing agent PM2-3, ethylene propylene diene rubber 4045m430-500, microcrystalline Cellulose 10-13, isopropanol 2-3, the sulphuric acid 0.4-1 of maleic anhydride 5-7,8-10%, phenol 60-70,37% formalin 61-70, barium hydroxide 0.6-0.8, PVC paste resin 3-5, chlorhexidine 0.6-1, the tert-butyl group are to biphenol 1-2, water solublity lanoline 1-2, beta-hydroxy alkylamide 1.2-3, kieselguhr 65-70, oxine 2-3, age resistor CMA2-4。

2. the preparation method of a boiler rubber sheath material as claimed in claim 1, it is characterised in that comprise the following steps:

(1) being joined by microcrystalline Cellulose in 2-3 times of water, add isopropanol, maleic anhydride, be stirring evenly and then adding into the sulphuric acid of 8-10%, react 6-7h in the water-bath of 50-60 DEG C, regulate pH to neutral, decompression steams moisture and isopropanol, obtains anhydride cellulose；

(2) water solublity lanoline is joined in 10-20 times of water, be stirring evenly and then adding into PVC paste resin, at 60-65 DEG C insulated and stirred 3-5 minute, cooling, obtain cooling resin liquid；

(3) join after above-mentioned phenol being added heat fusing in reactor, add barium hydroxide, at 70-75 DEG C insulated and stirred 20-30 minute, add 37% formalin, anhydride cellulose, keep boiling reaction 1-2 hour, add above-mentioned cooling resin liquid, stir, make temperature be reduced to 60-65 DEG C, decompression dehydration, cooling discharging, obtains anhydride cellulose resin；

(4) by above-mentioned anhydride cellulose resin, ethylene propylene diene rubber 4045m mixing, send into refining glue 10-15 time in banbury, add kieselguhr, chlorhexidine, the tert-butyl group to biphenol, oxine, beta-hydroxy alkylamide, banburying 3-4 minute at 90-100 DEG C, cooling discharging, park 20-24 hour, add and remain each raw material, send in mill, play triangle bag thin logical, bottom sheet, it is rolled into predetermined thickness, adopting vulcanizing press to carry out sulfidization molding, curing temperature is 135-140 DEG C, sulfide stress 9.5-10Mpa, cure time 15-20min。