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Rigid polyurethane foam with high flame retardance and preparation method of rigid polyurethane foam

A technology of rigid polyurethane and flame-retardant polyester, which is applied in the field of polyurethane foam, can solve the problems of poor flame-retardant effect, affecting the physical properties of polyurethane foam, and high proportion of flame retardants, so as to achieve improved flame-retardant effect, excellent compressive strength and The effect of dimensional stability

Active Publication Date: 2019-06-21
广州立泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has become one of the thermal insulation and energy-saving products that dominate the market; however, the polyether and polyester polyols in the common combination polyether formula currently on the market have a poor flame retardant effect due to the high content of fatty chains, and cannot reach B1 level
However, the proportion of flame retardant added in the formula of the existing B1 flame-retardant rigid polyurethane foam on the market is too high, usually reaching 30-60% of the total weight of the formula raw materials, which seriously affects the physical properties of the polyurethane foam. Decreased strength and poor dimensional stability

Method used

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  • Rigid polyurethane foam with high flame retardance and preparation method of rigid polyurethane foam

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preparation example Construction

[0038] In a second aspect, the present invention provides a method for preparing a high flame-retardant rigid polyurethane foam as described in the first aspect, comprising the steps of:

[0039] (1) Flame-retardant polyether polyol A, flame-retardant polyether polyol B, flame-retardant polyester polyol C, polyether polyol D, antioxidant, anti-hydrolysis stabilizer, foam stabilizer, water, catalyst A , Catalyst B, Catalyst C, flame retardant, blowing agent and auxiliary agent are mixed uniformly according to the proportion to prepare A component;

[0040] (2) The A component and the B component are sprayed on the base material by a spraying machine to prepare polyurethane foam.

[0041] In the embodiment of the present invention, the step (1) specifically includes: after uniformly mixing the auxiliary agent, catalyst A, and catalyst B, adding flame-retardant polyether polyol A, flame-retardant polyether polyol B, flame-retardant polyol Ester polyol C, polyether polyol D, anti...

Embodiment 1

[0049] The preparation method of the highly flame-retardant rigid polyurethane foam provided by the present embodiment comprises the following steps:

[0050] (1) Weigh the following raw materials in parts by weight: 47.2 parts of flame-retardant polyether polyol A, 39.4 parts of flame-retardant polyether polyol B, 31.2 parts of flame-retardant polyester polyol C, polyether 6.2 parts of polyol D, 2.5 parts of antioxidant TPP, 1.85 parts of monomeric carbodiimide, 2.32 parts of silicone foam stabilizer AK-8832, 4.3 parts of water, 3.6 parts of N,N-dimethylcyclohexylamine , 2.4 parts of ethylenediamine, 2.6 parts of dibutyltin dilaurate, 27.5 parts of triethyl phosphate, 42.6 parts of 1,1,1,3,3-pentafluorobutane, 4.0 parts of additives; the additives, N, After mixing N-dimethylcyclohexylamine and ethylenediamine evenly, add flame retardant polyether polyol A, flame retardant polyether polyol B, flame retardant polyester polyol C, polyether polyol D, antioxidant Agent TPP, monom...

Embodiment 2

[0053] The preparation method of the highly flame-retardant rigid polyurethane foam provided by the present embodiment comprises the following steps:

[0054] (1) Weigh the following raw materials in parts by weight: 52.3 parts of flame-retardant polyether polyol A, 38.6 parts of flame-retardant polyether polyol B, 32.5 parts of flame-retardant polyester polyol C, polyether polyol 6.5 parts of alcohol D, 2.4 parts of antioxidant TPP, 2.4 parts of monomeric carbodiimide, 2.8 parts of silicone foam stabilizer AK-8832, 4.5 parts of water, 3.5 parts of N,N-dimethylcyclohexylamine, 2.6 parts of ethylenediamine, 2.6 parts of dibutyltin dilaurate, 28 parts of triethyl phosphate, 35 parts of 1,1,1,3,3-pentafluorobutane, 3 parts of additives; -After mixing dimethylcyclohexylamine and ethylenediamine evenly, add flame-retardant polyether polyol A, flame-retardant polyether polyol B, flame-retardant polyester polyol C, polyether polyol D, and antioxidant TPP, monomeric carbodiimide, sil...

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Abstract

The invention discloses rigid polyurethane foam with high flame retardance and a preparation method of the rigid polyurethane foam. The rigid polyurethane foam with high flame retardance is prepared from a component A and a component B in a mass ratio being 1:1-1.5, wherein the component A is prepared from 30-60 parts by weight of flame-retardant polyether polyol A, 30-60 parts by weight of flame-retardant polyether polyol B, 20-40 parts by weight of flame-retardant polyester polyol C, 0-10 parts by weight of polyether polyol D, 0.5-5 parts by weight of an antioxidant, 0.5-5 parts by weight ofa hydrolysis stabilizer, 1-5 parts by weight of a foam stabilizer, 1-5 parts by weight of water, 1-5 parts by weight of a catalyst A, 1-5 parts by weight of a catalyst B, 1-5 parts by weight of a catalyst C, 20-60 parts by weight of a flame retardant, 20-60 parts by weight of a foaming agent and 0-7 parts by weight of an assistant; the component B is isocyanate. The rigid polyurethane foam with high flame retardance has the flame retardance level up to B1, the waterproof level up to II and the oxygen index higher than 30, and has excellent compressive strength and dimensional stability.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, in particular to a high flame-retardant rigid polyurethane foam and a preparation method thereof. Background technique [0002] Rigid polyurethane foam is used to replace traditional thermal insulation materials. It is mainly used in building exterior wall insulation, roof waterproof insulation integration, cold storage insulation, pipeline insulation materials, building panels, refrigerated vehicles and cold storage insulation materials, etc. It has become one of the thermal insulation and energy-saving products that dominate the market; however, the polyether and polyester polyols in the common combination polyether formula currently on the market have a poor flame retardant effect due to the high content of fatty chains, and cannot reach the B1 level. However, the proportion of flame retardant added in the existing B1 flame-retardant rigid polyurethane foam formula on the market is t...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/50C08J9/14C08K5/521C08K3/04C09D175/08C09D5/18
Inventor 韩华强李志辉
Owner 广州立泰新材料科技有限公司
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