Special environment-friendly combined polyether for sprayed pipeline and preparation method of special environment-friendly combined polyether

A combination of polyether and environment-friendly technology, applied in the direction of coating, etc., can solve the problems of uneven surface, heartburn, spray foam cracking, etc., and achieve the effect of simple preparation method, stable product quality and improved bond strength

Active Publication Date: 2014-04-02
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a special environment-friendly composite polyether for spray-coating pipelines and its preparation method, which can solve the problems of internal cracking, heartburn, and uneven surface of the spray-coated foam, and improve the adhesion between the foam and the substrate while achieving the purpose of complete environmental protection. Adhesive performance, to meet the needs of this process production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Raw materials: polyether polyol A (4.5 functionality, number average molecular weight 500-600) 45 kg;

[0041] Polyether polyol B (4 functionality, number average molecular weight 500-700) 15 kg;

[0042] Polyether polyol C (3 functionality, number average molecular weight 900-1000) 7 kg;

[0043] Polyester polyol (two functionalities, viscosity 2000-4000mpa.s / 25℃, acid value ≤1.0mgKOH / g) 5 kg;

[0044] 3 kg of TEA;

[0045] Foam stabilizer L-69201.5 kg;

[0046] Catalyst DabcoPT3031.5 kg, A-332.7 kg, PT3042 kg, DabcoT-120.3 kg;

[0047] Blowing agent: HFC-245fa 17 kg.

[0048] The preparation steps are as follows:

[0049] A component material:

[0050] Put the weighed raw materials into the reaction kettle and stir for 1 hour, take them out for inspection, and meet the set foaming parameters, that is, the qualified product of component A is obtained, take it out of the reaction kettle and put it into a barrel;

[0051] B component material:

[0052] Polymethyl...

Embodiment 2

[0057] Raw materials: polyether polyol A (4.5 functionality, number average molecular weight 500-600) 40 kg;

[0058] Polyether polyol B (4 functionality, number average molecular weight 500-700) 15 kg;

[0059] Polyether polyol C (3 functionality, number average molecular weight 900-1000) 9 kg;

[0060] Polyester polyol (two functionalities, viscosity 2000-4000mpa.s / 25℃, acid value ≤1.0mgKOH / g) 7 kg;

[0061] 3 kg of cross-linking agent TEA;

[0062] Foam stabilizer L-69201.5 kg;

[0063] Catalyst DabcoPT3031.4 kg, A-332.9 kg, PT3041.8 kg, DabcoT-120.4 kg;

[0064] Foaming agent: HFC-245fa 18 kg.

[0065] The preparation steps are as follows:

[0066] A component material:

[0067] Put the weighed raw materials into the reaction kettle and stir for 1 hour, take them out for inspection, and meet the set foaming parameters, that is, the qualified product of component A is obtained, take it out of the reaction kettle and put it into a barrel;

[0068] B component material: ...

Embodiment 3

[0074] Raw materials: polyether polyol A (4.5 functionality, number average molecular weight 500-600) 40 kg;

[0075] Polyether polyol B (4 functionality, number average molecular weight 500-700) 18 kg;

[0076] Polyether polyol C (3 functionality, number average molecular weight 900-1000) 7 kg;

[0077] Polyester polyol (two functionalities, viscosity 2000-4000mpa.s / 25℃, acid value ≤1.0mgKOH / g) 5 kg;

[0078] 5 kg of cross-linking agent TEA;

[0079] Foam stabilizer L-69201.8 kg;

[0080] Catalyst DabcoPT3031.5 kg, A-333.0 kg, PT3041.4 kg, catalyst DabcoT-120.3 kg;

[0081] Blowing agent: HFC-245fa 17 kg.

[0082] The preparation steps are as follows:

[0083] A component material:

[0084] Put the weighed raw materials into the reaction kettle and stir for 1 hour, take them out for inspection, and meet the set foaming parameters, that is, the qualified product of component A is obtained, take it out of the reaction kettle and put it into a barrel;

[0085] B component...

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Abstract

The invention discloses special environment-friendly combined polyether for a sprayed pipeline and a preparation method of the special environment-friendly combined polyether. The special environment-friendly combined polyether is composed of a component A and a component B, wherein the component A is composed of polyethylene-polypropylene glycol, polyester polyol, a crosslinking agent, a foam stabilizer, a catalyst and a foaming agent; the component B is polymethylene polyphenyl polyisocyanate. By using the special environment-friendly combined polyether, the problems of inside cracking, heart rot and surface roughness of sprayed foam are solved, the aim of completely protecting the environment is achieved, meanwhile, the bonding property of the foam and a base material is improved, and the production requirement of the process is met.

Description

technical field [0001] The invention belongs to the field of chemically synthesized polyurethane foam plastics, and in particular relates to a special environment-friendly composite polyether for spray-coating pipelines and a preparation method thereof. Background technique [0002] Polyurethane insulation pipes are widely used in heat pipe network transportation and oil transportation, and are gradually being widely used due to their excellent performance. The demand is increasing. At present, the production process of polyurethane insulation pipes is mainly a two-step pouring production process. Due to the limitations of the process itself, the produced polyurethane pipe products have the problems of uneven foam density distribution and stress concentration. After a period of use, the foam is prone to overall cracking. , affecting the delivery efficiency. With the continuous development of the industry, the production of polyurethane pipes by spraying polyethylene windin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08J9/14C08L75/08
CPCC08G18/3281C08G18/4816C08G18/6622C08G2150/50C08J9/146C08J2203/142C08J2375/08C08G2110/0058
Inventor 李明友徐业峰李欣宁晓龙马海晶张佳佳朱文静
Owner SHANDONG INOV NEW MATERIALS CO LTD
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