CN100386559C - Hard polyurethane polystyrene foam plastic composite thermal-insulating pipe case - Google Patents

Abstract

The invention relates to a hard polyurethane polystyrene foam composite insulation pipe shell for oil, chemical and heating pipe. a layer of hard polyurethane is coated on formed polystyrene foam shell. The base material of hard polyurethane comprises black material, white material and assistant. The weight ratio of black material, white material and assistant is 1:1:1 or 1:1.1:1. The black material is polyisocyanate, pitch or 635 polyether monomer. The white material is polyether polyol or 403 polyether. The assistant is surfactant and foaming agent. The surfactant comprises dimethyl cyolohexlemine, triethylenediamine, diethanolamine, triethanolamine and one or two of MDI or TDI. The foaming agent comprises CFC-11, non-fluorine or pentane. The material is provided with unease deformation, anti-radiation of solvent and heat and low cost. Polyisocyanate, polyether polyol and assistant so on have the slightly soluble effect to polystyrene foam. After formed it is provided with stiff combination and high intensity and can provide safeguard to anti-water of buried insulation pipeline.

Description

Hard polyurethane polystyrene foam plastic composite thermal-insulating pipe case

Technical field

The present invention relates to the hard polyurethane polystyrene foam plastic composite thermal-insulating pipe case of a kind of oil, chemical industry, heating pipe.

Background technique

Oil, chemical pipeline are in order to guarantee the normal conveying of medium, usually adopt pipeline to add thermal insulation layer and be incubated conveying, the oil field gathering line adopts to mix fails or accompanies the normal conveying of thermal flow process with assurance crude oil, the heat traced pipeline insulation is prefabricated into the RPUF jacket tube and has a lot of insurmountable problems, stand gut line because distance is short, welding junction, elbow are more, use the RPUF jacket tube very inconvenient.The insulation of heat traced pipeline and station gut line, the use of water-proofing material are subjected to certain restriction, and oil, chemical industry, pipeline method in common are the methods that thermal insulation layer adopts hard rock wool or the insulation of super glass wool shell.

Said method exists following fatal shortcoming in application: 1. construction process complexity; 2. constructional difficulties can't guarantee the integrity of watertightness barrier; 3. the thermal insulating material moisture absorption is strong; 4. the most of pipeline in northern oil field need pass through low lying areas such as rice field, water channel, causes the thermal insulation layer water inlet, and insulation usefulness inefficacy energy consumption increases, and the pipeline corrosion that causes thus perforation; These problems fail to be solved well so far.

Summary of the invention

The objective of the invention is to adopt RPUF and polystyrene foam plastics composite material to replace inorganic heat insulating fiber material one hard rock wool or super glass wool shell, make that the thermal-insulating pipe case thermal conductivity is little, water absorption rate is low.

Hard polyaminoester, polystyrene foam plastics composite material are to constitute by coat one deck hard polyaminoester outside doing the polystyrene foam plastics housing of shaping;

1, the base stock of hard polyaminoester (PU) foamed plastics is by black material, material and auxiliary agent are formed in vain, and black material, material and auxiliary agent are black material by weight proportion in vain: expect in vain: auxiliary agent=1: 1: 1 or 1: 1.1: 1;

Black material is polyisocyanates, pitch or 635 polyether monomers;

White material is polyether polyol or 403 polyethers;

Auxiliary agent is surface active agent and stabilizer, and surface active agent comprises one to two kind of dimethyl cyclohexyl amine, triethylene diamine, diethanol amine, triethanolamine, MDI or TDI, and stabilizer comprises CFC-11, no fluorochlorohydrocarbon or pentane.

2, polystyrene (PS) but foamed plastics is the hair style polystyrene foam plastics, can be divided into polystyrol plastic foam plate material and shell according to shape, shell also is referred to as pipe watt, and wherein shell can cut into or adopt polystyrene mother material to send out in mould into different shape as circle, ellipse, abnormal shape etc. by the polystyrol plastic foam plate material;

3. will deceive material, in vain the material and auxiliary agent in 1: 1: 1 or ratio dosing in 1: 1.1: 1, mould is injected in dosing, put into the hard polystyrene foamed plastics again and wait to solidify a back mold forming or the hard polystyrene foamed plastics is put into mould, again dosing is injected mould and wait to solidify a back mold forming.Polystyrene (PS), hard polyaminoester (PU) amount ratio or thickness will be compound than with hard polyaminoester the polystyrene surface of contact all be covered as suitablely, thickness and ratio are fixed as required.

Hard polyaminoester, polystyrene foam plastics compound insulating material advantage:

1, it is compound to adopt RPUF and polystyrene foam plastics to carry out, and has overcome simple RPUF placement a period of time easily to deform, and causes the shortcoming that can't use.

2, adopt RPUF and polystyrene foam plastics to carry out compound, overcome the not solvent-proof shortcoming of simple polystyrene foam plastics (polystyrene foam plastics is dissolved in multiple organic solvents such as gasoline, benzene, dimethylbenzene), overcome the shortcoming of the thermo-labile radiation of polystyrene foam plastics.

3, it is compound to adopt RPUF and polystyrene foam plastics to carry out, and has increased the intensity of thermal insulating material, and the price of polystyrene foam plastics will can reduce the cost of thermal insulating material significantly well below the price of RPUF.

4, p-poly-phenyl vinylic foams such as polyisocyanates, polyether polyol and auxiliary agent have the slightly soluble effect, and combination is very firm after the moulding.

5, hard polyaminoester, polystyrene foam plastics compound insulating material intensity height are for the waterproof that performs the buried heat insulation pipe line provides guarantee.

Embodiment

Embodiment 1

But 1,, make the polystyrol plastic foam plate material according to shape at first with hair style polystyrene (PS) foamed plastics, by the polystyrol plastic foam plate material cut into different shape as: circular, oval, special-shaped;

2, the base stock of hard polyaminoester (PU) foamed plastics is made up of polyisocyanates, polyether polyol, dimethyl cyclohexyl amine, triethylene diamine and CFC-11, and by weight: isocyanates: polyether polyol: auxiliary agent=1: 1: 1 is made into liquid;

3, mould is injected in dosing, put into hard polystyrene foam molding shell again and wait to solidify a back mold forming.

Embodiment 2

But 1, at first with hair style polystyrene (PS) foamed plastics, make the polystyrene foam plastics shell according to shape, shell also is referred to as pipe watt, adopts polystyrene mother material to send out in mould into different shape as circular, ellipse, special-shaped;

2, the base stock of hard polyaminoester (PU) foamed plastics is by 635 polyether monomers, 403 polyethers, diethanol amine, triethanolamine with do not have fluorochlorohydrocarbon and form, 635 polyether monomers, 403 polyethers and auxiliary agent by weight: 635 polyether monomers: 403 polyethers: auxiliary agent=1: 1.1: 1 is made into liquid;

3, hard polystyrene foam molding shell is put into mould, again dosing is injected mould and wait to solidify a back mold forming.

Embodiment 3

But 1,, make the polystyrol plastic foam plate material according to shape at first with hair style polystyrene (PS) foamed plastics, by the polystyrol plastic foam plate material cut into different shape as: circular, oval, special-shaped;

2, the base stock of hard polyaminoester (PU) foamed plastics is made up of pitch, polyether polyol, surface active agent MDI, TDI, stabilizer pentane, and by weight: pitch: polyether polyol: auxiliary agent=1: 1: 1 is made into liquid;

3, mould is injected in dosing, put into hard polystyrene foam molding shell again and wait to solidify a back mold forming.

Claims (1)

1. hard polyurethane polystyrene foam plastic composite thermal-insulating pipe case is characterized in that:

Be to constitute by outside doing the polystyrene foam plastics housing of shaping, coating one deck hard polyaminoester;

The base stock of RPUF is by black material, material and auxiliary agent are formed in vain, and black material, material and auxiliary agent are black material by weight proportion in vain: expect in vain: auxiliary agent=1: 1: 1 or 1: 1.1: 1;

Black material is polyisocyanates, pitch or 635 polyether monomers;

White material is polyether polyol or 403 polyethers;

Auxiliary agent is surface active agent and stabilizer, and surface active agent comprises one to two kind of dimethyl cyclohexyl amine, triethylene diamine, diethanol amine, triethanolamine, MDI or TDI, and stabilizer comprises CFC-11, no fluorochlorohydrocarbon or pentane.