CN101531749A - Low temperature resistance heat insulating material for supporting part of LNG ship and preparation method thereof - Google Patents

Abstract

The invention discloses a low temperature resistance heat insulating material for a supporting part of an LNG ship and a preparation method thereof. The low temperature resistance heat insulating material for the supporting part of the LNG ship is prepared by reacting a component A with a component B of an isocyanate, wherein the component A comprises 60 to 80 percent of mixed polyols, 0.5 to 2 percent of catalyst, 0.5 to 2 percent of foam stabilizer, 2 to 15 percent of foaming agent, 2 to 10 percent of flame retardant, and 8 to 15 percent of chain extender. The material can be used at the supporting part of the LNG ship at a temperature between 200 DEG C above zero and 200 DEG C below zero and has the advantages of high hardness, good anti-pressure performance, low deformability, high water resistance and small coefficient of thermal conductivity.

Description

Be used for low temperature resistant heat-insulating material of LNG ship support zone and preparation method thereof

Technical field

The invention belongs to the material field, more particularly, relate to a kind of anti-ultralow heat-insulating material and preparation method thereof.This material can be applicable to the storage of very low temperature materials such as natural gas liquids, liquid nitrogen, liquid oxygen, fields such as transportation.

Background technology

The LNG ship is to transport the main transportation means of natural liquefied gas, and its transportation be unable to do without lagging material, and the loading and unloading of LNG ship are all undertaken by pipeline, but pipeline has various positions, as support zone and the pipeline position that need not support.At the support zone lagging material except the power effect of bearing support, also be subjected to the effect of thermal stresses, the on-the-spot discovery, support zone produces damaged because of fatigue easily, this adiabatic heat-insulation and safety hazard for ship is great, therefore the material of support zone also requires higher mechanical strength of load-bearing and hardness except the thermal insulation that requires other positions, fire-retardant, low temperature resistant, water resisting general property.But present existing material can't be taken into account above-mentioned over-all properties, can not meet the demands.

Summary of the invention

The objective of the invention is provides low temperature resistant heat-insulating material of a kind of LNG of being used for ship support zone and preparation method thereof in order to solve above-mentioned existing in prior technology deficiency.

To achieve the above object, technical scheme of the present invention is: the low temperature resistant heat-insulating material of a kind of LNG of being used for ship support zone, its basic principle is by in the material of the urethane that foams, and introduces function phenyl ring group and improves hardness, and utilization-Si-O rotates easily to eliminate stress simultaneously, this material is by polyvalent alcohol, catalyzer, foam stabilizer, whipping agent, fire retardant, the A component that chainextender is formed; With the B component reaction of isocyanates, wherein each constituent mass per-cent of A component is again:

Polyvalent alcohol 60-80%,

Whipping agent 2-15%,

Foam stabilizer 0.5-2%,

Fire retardant 2-10%,

Catalyzer 0.5-2%,

Chainextender 8-15%.

The polyvalent alcohol of the above is that aniline is the initiator polyether glycol.

The whipping agent of the above is a kind of whipping agent of fluorine chlorinated hydrocarbon.

The foam stabilizer of the above is the foam stabilizer of silicane.

The fire retardant of the above is the P contained compound fire retardant.

The catalyzer of the above is the mixture of organotin and amine, and concrete blending ratio is 1/120.

Above-mentioned its constitutional features of described chainextender is:

Wherein, the n value is 10～100.R is a chain alkyl in the formula, and its effect is the snappiness that increases at low temperatures.

To achieve the above object, another technical scheme of the present invention is: the preparation method of the low temperature resistant heat-insulating material of a kind of LNG of being used for ship support zone comprises the steps:

Step 1, preparation A component will be formed the polyvalent alcohol of A component, catalyzer, whipping agent,, foam stabilizer, whipping agent, fire retardant, chainextender, by mixing behind its mass percent prescription, it is stand-by to be injected in the foaming machine A jar storage;

Step 2, preparation B component, apolegamy meet isocyanic ester (OCN-R-NCO) that mol ratio requires, and to be injected in the foaming machine B jar storage stand-by;

The preparation of step 3, material starts foaming machine earlier, and again with A, two blending ingredients of B are placed on thorough mixing in the rifle head, inject size at last, size, the interior foaming of the mould that shape is certain.

The beneficial effect of low temperature resistant heat-insulating material of a kind of LNG of being used for ship support zone of the present invention and preparation method thereof is mainly reflected in:

1, the highest shore hardness has reached 105;

2, ultimate compression strength has reached 18Mpa;

3, thermal conductivity has been reduced to below the 0.015w/m.k;

4, can be at-220 ℃ of above life-time service of low temperature;

5, abscess is even, and size is at 90-150 μ m;

6, under 400 ℃ of temperature heads changed, material mechanical performance remained unchanged.；

The low temperature resistant heat-insulating material of the LNG of being used for ship support zone of the present invention has anti-very low temperature mechanical property (adapt to wide temperature range change rapidly), and flame retardant properties is good, and thermal conductivity is low, the thermal losses of very low temperature liquid such as can effectively prevent in pipeline and the tank body.Can be widely used in space flight, the energy, food, aspects such as medical treatment need the mechanical strength height, and the position construction that deformability is little is used.

Embodiment

Embodiment 1:

One, proportioning:

The A component: the ratio of title complex is as follows:

1, polyvalent alcohol 80%,

2, whipping agent 2%,

3, foam stabilizer 0.5%,

4, fire retardant 2%,

5, catalyzer 0.5%,

6, chainextender 15%;

The B component: isocyanic ester (MDI) NCO/OH molar ratio is 1:1.

Two, preparation:

Above 1 to 6 each component mixed be stored in the foaming machine A batch can; Isocyanic ester (MDI) is stored in the foaming machine B batch can; Above-mentioned all material foaming machines are mixed back molded at 40 mould inner moulds of spending.

Its beneficial effect: remove at-220 ℃ more than the low temperature, under 300 ℃ of difference variation, outside the life-time service mechanical property remains unchanged, mechanical property higher compression intensity can reach 38Mpa, shore hardness is 105, and thermal conductivity is 0.019w/m.k, and the abscess mean size is 150 μ m.

Embodiment 2:

One, proportioning:

The A component: the ratio of title complex is as follows:

1, polyvalent alcohol 60%,

2, whipping agent 15%,

3, foam stabilizer 2%,

4, fire retardant 10%,

5, catalyzer 2%,

6, chainextender 11%.

The B component: isocyanic ester (MDI) NCO/OH molar ratio is 1.05:1.

Two, the preparation method is with embodiment 1.

Its beneficial effect: remove at-220 ℃ more than the low temperature, under 300 ℃ of difference variation, outside the life-time service mechanical property remained unchanged, compressive strength can reach 28Mpa, and shore hardness is 83, and thermal conductivity is 0.011w/m.k, and the abscess mean size is 90 μ m.

Embodiment 3:

One, proportioning:

The A component: the ratio of title complex is as follows:

1, polyvalent alcohol 70%,

2, whipping agent 10%,

3, foam stabilizer 1%,

4, fire retardant 10%,

5, catalyzer 1%,

6, chainextender 8%.

The B component: isocyanic ester (MDI) NCO/OH ratio is 1.05:1.

Two, the preparation method is with embodiment 1.

Its beneficial effect: remove at-220 ℃ more than the low temperature, under 300 ℃ of difference variation, outside the life-time service mechanical property remains unchanged, mechanics, heat conduction over-all properties are better, and compressive strength can reach 30Mpa, and shore hardness is 95, and thermal conductivity is 0.012w/m.k, and the abscess mean size is 110 μ m.

Embodiment 4:

One, proportioning:

The A component: the ratio of title complex is as follows:

1, polyol blend 75%,

2, whipping agent 8%,

3, foam stabilizer 1%,

4, fire retardant 5%,

5, catalyzer 1%,

6, chainextender 10%.

The B component: isocyanic ester (MDI) NCO/OH ratio is 2:1.

Two, the preparation method is with embodiment 1.

Its beneficial effect: remove at-220 ℃ more than the low temperature, under 300 ℃ of difference variation, outside the life-time service mechanical property remained unchanged, thermal conductivity is little only to be 0.010w/m.k, and the abscess mean size is 130 μ m, and compressive strength is 10Mpa, and shore hardness is 101.

Embodiment 5:

One, proportioning:

The A component: the ratio of title complex is as follows:

1, polyol blend 68%,

2, whipping agent 12%,

3, foam stabilizer 1%,

4, fire retardant 3%,

5, mixed catalyst 1%,

6, chainextender 15%.

The B component: isocyanic ester (MDI) NCO/OH ratio is 1.1:1.

Two, the preparation method is with embodiment 1.

Its beneficial effect: remove at-220 ℃ more than the low temperature, under 300 ℃ of difference variation, outside the life-time service mechanical property remains unchanged, thermal conductivity is little only to be 0.011w/m ℃, the abscess mean size is 150 μ m, and compressive strength is 35Mpa, and shore hardness is 101, and the shock resistance under-200 ℃ of low temperature is good, is difficult for embrittlement.

Described embodiment only is used to illustrate the technical program, is not limited to the present invention.

Claims (9)

1. one kind is used for the low temperature resistant heat-insulating material of LNG ship support zone, it is characterized in that: by polyvalent alcohol, and catalyzer, foam stabilizer, whipping agent, the A component that fire retardant, chainextender are formed is again with the B component reaction of isocyanates; Wherein the mass percentage content of the composition component of A component is:

Polyvalent alcohol 60-80%,

Whipping agent 2-15%,

Foam stabilizer 0.5-2%,

Fire retardant 2-10%,

Catalyzer 0.5-2%,

Chainextender 8-15%.

2, a kind of low temperature resistant heat-insulating material of LNG ship support zone that is used for according to claim 1, it is characterized in that: described polyvalent alcohol is meant that aniline is the initiator polyether glycol.

3, a kind of low temperature resistant heat-insulating material of LNG ship support zone that is used for according to claim 1, it is characterized in that: described whipping agent is a fluorine chlorinated hydrocarbon whipping agent.

4, the low temperature resistant heat-insulating material of a kind of LNG ship support zone according to claim 1, it is characterized in that: described foam stabilizer is the foam stabilizer of silicane.

5, a kind of low temperature resistant heat-insulating material of LNG ship support zone that is used for according to claim 1, it is characterized in that: described fire retardant is Phosphorus fire retardant.

6, a kind of low temperature resistant heat-insulating material of LNG ship support zone that is used for according to claim 1, it is characterized in that: described catalyzer is the mixture of organotin and amine, the ratio of mixture of amine and organotin is 120/1.

7, a kind of low temperature resistant heat-insulating material of LNG ship support zone that is used for according to claim 1, it is characterized in that: its constitutional features of described chainextender is:

Wherein, R is an alkyl, and the n value is 10～100.

8, a kind of low temperature resistant heat-insulating material of LNG ship support zone that is used for according to claim 1 is characterized in that: the B component of described isocyanates is to contain at least a in the material of end-NCO group; Its molecular structural formula is: OCN-R-NCO, and R is small molecules or macromolecular chain segment in the formula; Its consumption by in NCO of its functional group and the polyol blend-OH functional group calculates by molar weight, its proportional range is between 1.0-2.0.

9, prepare the method for the low temperature resistant heat-insulating material of the described a kind of LNG of the being used for ship support zone of claim 1, it is characterized in that: may further comprise the steps:

Step 1, preparation A component will be formed the polyol blend of A component, catalyzer, whipping agent,, foam stabilizer, whipping agent, fire retardant, chainextender, by mixing behind its mass percent prescription, it is stand-by to be injected in the foaming machine A jar storage;

Step 2, preparation B component, apolegamy meet isocyanic ester (OCN-R-NCO) that mol ratio requires, and to be injected in the foaming machine B jar storage stand-by;

The preparation of step 3, material starts foaming machine earlier, and again with A, two blending ingredients of B are placed on thorough mixing in the rifle head, inject size at last, size, the interior foaming of the mould that shape is certain.