CN105153682A - Polyether urethane-based composite material - Google Patents

Abstract

The invention provides a polyether urethane-based composite material which is characterized by being prepared according to the following steps: step I, adding methylene-4,4'-phenyl-di-isocyanic acid, diamine, and poly-tetramethylene-ether glycol into a reaction vessel according to the molar ratio of 5:1:2, pumping nitrogen into the reaction vessel, heating, and controlling the reaction temperature to be 50 DEG C or lower, wherein the reaction vessel is equipped with a stirrer; step II, drying nanoscale calcium carbonate, magnesium hydroxide and zinc oxide among which the proportion is 8:6:7 at 96 DEG C, cooling the dried materials at 96 DEG C, adding the cooled materials into polyether urethane for mixing, adding the mixture into an open mill, carrying out rubber mixing for 5 minutes at 80 to 90 DEG C, carrying out thin-passing for six times, discharging rubber strips, pressing the rubber strips for formation with a vulcanizing machine, and carrying out trimming, inspection and packaging, so as to obtain the required sealing ring.

Description

A kind of macromolecule resin based composites

Technical field

The application relates to a kind of macromolecule resin based composites, and be specifically related to a kind of polyether(poly)urethane based composites, relate to a kind of wear ring more specifically, it is made up of above-mentioned materials.

Background technology

Along with the fast development of Modern hydraulic drive technology, the sealing problem of hydraulic efficiency plant is more and more outstanding.Existing hydraulic seal pad sealing effectiveness, compression resilience and physical strength etc. far can not meet actual requirement, easily occur the phenomenons such as gasket is rotten, expansion, aging cracking, leakage of oil, thus cause hydraulic efficiency plant normally to work.

The hydraulic pressure end contact type shaft seal that water turbine adopts is the simple but main shaft sealing construction of result of use relative ideal of a kind of principle, and inspect and change is also more convenient.Due to employing is contact seal principle, and wearing and tearing appears in wear ring and this pair sealing pair of change unavoidably, and in fact the work-ing life of sealing depend on the side damaged at first in wear ring and change.So, if the power station suggestion change run into containing silt is serious sprays alloy to increase work-ing life.Wear ring has good self-lubricating property, in use with easily keep during change surface contact sliding, avoid occurring tearing have certain provide protection to wear ring itself; Good wear resistance and wear rate ensure that life-time service.

To lubricating oil at work because of the oil gas that the factors such as heating, stirring produce, normally used sealing means is fixed interval (FI) formula sealing, packing seal etc. two kinds.Wherein fixed interval (FI) formula seals because the advantages such as structure is simple, nothing wearing and tearing are used widely; But the size that its shortcoming is sealing-gap cannot adjust, and there will be serious oil and gas leakage when gap is larger.Packing seal is actually a kind of contact seal, can avoid the leakage of oil gas in theory completely; Its reason lost efficacy mostly is the saturated oil-containing of filler, wearing and tearing, yielding, and especially filler occurs that gap causes the phenomenon of oil and gas leakage the most general after making a concession

Therefore, developing one, to have frictional coefficient low, and good springiness, the wear ring that self-lubricating property is excellent is particularly important.

Summary of the invention

The present invention relates to a kind of polyether(poly)urethane based composites, it is characterized in that being prepared from by following steps:

Step one, by methylene-4, 4 '-phenyl diisocyanate resin, diamines, poly-tetramethylene ether diol is according to the ratio of mol ratio 5: 1: 2, join in reaction vessel, this reaction vessel is with agitator, reaction vessel passes into nitrogen, heating, control temperature of reaction less than 50 DEG C, dimethyl formamide is added after one and a half hours, mol ratio is: 1.5 (with reference to above-mentioned mol ratios), stir, obtain performed polymer, then chain extension is entered, under agitation, by chainextender 1, 4-butyleneglycol acne join in above-mentioned performed polymer, control temperature was 85 DEG C of reactions two hours, then dilute with micro-dimethyl formamide, obtain polyether(poly)urethane.

Step 2, by nanometer grade calcium carbonate: magnesium hydroxide: zinc oxide=8: 6: 7 ratios are at the temperature of 96 DEG C after dry cooling, join in polyether(poly)urethane and mix, then join in mill, at 80-90 DEG C, refine glue 5min, bottom sheet after thin-pass 6 times, utilizes vulcanizer compression moulding by film, deburring, inspection, packaging, namely obtains required wear ring.

A kind of wear ring, it is made up of above-mentioned materials.

Embodiment

A kind of polyether(poly)urethane based composites, is characterized in that being prepared from by following steps:

Step one, by methylene-4, 4 '-phenyl diisocyanate resin, diamines, poly-tetramethylene ether diol is according to the ratio of mol ratio 5: 1: 2, join in reaction vessel, this reaction vessel is with agitator, reaction vessel passes into nitrogen, heating, control temperature of reaction less than 50 DEG C, dimethyl formamide is added after one and a half hours, mol ratio is: 1.5 (with reference to above-mentioned mol ratios), stir, obtain performed polymer, then chain extension is entered, under agitation, by chainextender 1, 4-butyleneglycol acne join in above-mentioned performed polymer, control temperature was 85 DEG C of reactions two hours, then dilute with micro-dimethyl formamide, obtain polyether(poly)urethane.

Step 2, by nanometer grade calcium carbonate: magnesium hydroxide: zinc oxide=8: 6: 7 ratios are at the temperature of 96 DEG C after dry cooling, join in polyether(poly)urethane and mix, then join in mill, at 86 DEG C, refine glue 5min, bottom sheet after thin-pass 6 times, utilizes vulcanizer compression moulding by film, deburring, inspection, packaging, namely obtains required wear ring.

After tested, the performance of sealing ring is as follows: frictional coefficient is low: 0.02 (being 1/25th of General Purpose Rubber NBR, RP) can make two contact surfaces produce comparatively low-frictional force, avoids power loss serious, or heating, wearing and tearing.

Self-lubricating property: excellent (ensure that self can be good at lubrication when not having extraneous lubricator to get involved also uses for a long time)

Extension at break amount: > 220% (ensure that this material has certain tensile property)

Hardness: 54 (shore hardness D) excellent heat conductivity: 0.36W/ (Km) 30 DEG C (have good thermal conductivity, well overcome the situation that local pyrexia causes material damage)

Operating temperature range is wide :-160 DEG C ~ 220 DEG C materials can keep stable over-all properties within the scope of this substantial temperature.

Ultimate compression strength: > 20MPa (strong shock can be born and be unlikely to make material damage)

Expansion rate of water absorption is low: be less than 0.03% (when soaking 24 in 30 DEG C of water)

Wear resisting property: very good.Because the molecular-weight average of resin base polymer material is at more than 6.8*106g/mol, longer molecular chain and special stopping composition can ensure that material uses and is unlikely to wear out failure in for a long time, ensure that Long-Term Properties is stablized.

Claims (3)

1. a polyether(poly)urethane based composites, is characterized in that being prepared from by following steps:

Step one, by methylene-4, 4 '-phenyl diisocyanate resin, diamines, poly-tetramethylene ether diol is according to the ratio of mol ratio 5: 1: 2, join in reaction vessel, this reaction vessel is with agitator, reaction vessel passes into nitrogen, heating, control temperature of reaction less than 50 DEG C, dimethyl formamide is added after one and a half hours, mol ratio is: 1.5 (with reference to above-mentioned mol ratios), stir, obtain performed polymer, then chain extension is entered, under agitation, by chainextender 1, 4-butyleneglycol acne join in above-mentioned performed polymer, control temperature was 85 DEG C of reactions two hours, then dilute with micro-dimethyl formamide, obtain polyether(poly)urethane.

Step 2, by nanometer grade calcium carbonate: magnesium hydroxide: zinc oxide=8: 6: 7 ratios are at the temperature of 96 DEG C after dry cooling, join in polyether(poly)urethane and mix, then join in mill, at 80-90 DEG C, refine glue 5min, bottom sheet after thin-pass 6 times, utilizes vulcanizer compression moulding by film, deburring, inspection, packaging, namely obtains required wear ring.

2. a wear ring, it is made up of material described in claim 1.

3. a preparation method for polyether(poly)urethane based composites, is characterized in that it comprises the steps:

Step one, by methylene-4, 4 '-phenyl diisocyanate resin, diamines, poly-tetramethylene ether diol is according to the ratio of mol ratio 5: 1: 2, join in reaction vessel, this reaction vessel is with agitator, reaction vessel passes into nitrogen, heating, control temperature of reaction less than 50 DEG C, dimethyl formamide is added after one and a half hours, mol ratio is: 1.5 (with reference to above-mentioned mol ratios), stir, obtain performed polymer, then chain extension is entered, under agitation, by chainextender 1, 4-butyleneglycol acne join in above-mentioned performed polymer, control temperature was 85 DEG C of reactions two hours, then dilute with micro-dimethyl formamide, obtain polyether(poly)urethane.

Step 2, by nanometer grade calcium carbonate: magnesium hydroxide: zinc oxide=8: 6: 7 ratios are at the temperature of 96 DEG C after dry cooling, join in polyether(poly)urethane and mix, then join in mill, at 80-90 DEG C, refine glue 5min, bottom sheet after thin-pass 6 times, utilizes vulcanizer compression moulding by film, deburring, inspection, packaging, namely obtains required wear ring.