Polyurethane composite polyether, polyurethane rigid foam and preparation method of polyurethane rigid foam

A technology of combining polyether and rigid foam, applied in the field of polyurethane materials, can solve the problems of low smoke density, high compressive strength to density ratio, reduce foam mechanical properties, etc., achieve flame retardancy and smoke suppression performance improvement, high compressive strength Effect of Density Ratio, Specific Extinction Area Reduction

Inactive Publication Date: 2018-07-10

成都利亨聚氨酯新材料有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Liquid flame retardant materials mainly include diethyl ethyl phosphonate, dimethyl propyl phosphonate, triethyl phosphate and tris(2-chloroisopropyl) phosphate, etc. In addition to the flame retardant performance, there are also disadvantages such as reducing the mechanical properties of the foam, increasing the amount of smoke generated when the foam burns, and significantly increasing the density of the core material of the foam. Specifically, it has a lower compressive...

Abstract

The invention belongs to the technical field of polyurethane materials. In order to solve the problems that the polyurethane foam in the prior art has low flame retardancy, poor mechanical performance, large smoke amount, relatively low compression strength-density ratio, relatively low oxygen index-density ratio, relatively large smoke density, and the like, the invention provides polyurethane composite polyether, polyurethane rigid foam and a preparation method of the polyurethane rigid foam. The polyurethane composite polyether comprises a component A, and the component A comprises the following components in parts by weight: 30-70 parts of melamine polyol, 30-70 parts of phosphorus-containing polyester glycol, 10-20 parts of a smoke-suppression fire retardant, 10-25 parts of a physicalfoaming agent, 1-3 parts of a foam stabilizer, 1-2 parts of a chemical foaming agent and 2-5 parts of a catalyst. The polyurethane rigid foam comprises the component A and a component B, wherein thecomponent B is polymethylene polyphenyl polyisocyanate, the weight ratio of the component A to the component B is 1:(1.0-1.7). The polyurethane rigid foam also has the characteristics of high compressive strength-density ratio and high oxygen index-density ratio.

Technology Topic

ChemistryHigh oxygen +13

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Examples

Experimental program(15)
Comparison scheme(2)
Effect test(1)

Example Embodiment

[0035] A preparation method of polyurethane rigid foam includes the steps:

[0036] A. Preparation of polyurethane combined polyether: add melamine polyol, phosphorus-containing polyester diol, smoke suppressant flame retardant, foam stabilizer, chemical blowing agent and catalyst into the reactor, pre-stir it, and then add physical hair Foaming agent, and then stirred to prepare polyurethane combined polyether;

[0037] B. Preparation of rigid polyurethane foam: Component B and polyurethane combined polyether are mixed uniformly and molded to obtain rigid polyurethane foam.

[0038] Further, the pre-stirring temperature in step A is 20-25°C, the pre-stirring time is 10 min, and the re-stirring time is 0.5 h to 1 h; the molding operation in step B uses a high-pressure foaming agent machine to mix and foam Continuous forming of double track.

[0039] The specific preparation method is as follows:

[0040] Proceed as follows:

[0041] (1) 30-70 parts of melamine polyol, 70-30 parts of phosphorus-containing polyester glycol, 10-20 parts of smoke suppressant flame retardant, 1-3 parts of foam stabilizer, 1-2 parts of chemical foam Adding agent and 2-5 parts of catalyst to the reaction kettle in sequence, pre-stirring at 20-25℃ for 10 minutes, then adding 10-20 parts of physical blowing agent, stirring for 0.5-1h, and then discharging to obtain component A;

[0042] (2) Polymethylene polyphenyl polyisocyanate is used as component B, and component A and component B of step (1) are intermittently or continuously or sprayed according to a weight ratio of 1:1-2 with the aid of known mixing equipment. preparation. The specific embodiment of the present invention preferably has a weight ratio of 1:1.4-1.7, and particularly preferably a weight ratio of 1:1.6, which is continuously formed by mixing and foaming double crawlers through a high-pressure foaming agent machine.

[0043] As far as the present invention is concerned, the rigid foam prepared by the present invention is preferably 30-50kg/m in terms of the apparent core density of the foam according to GB/T6343-1995 3 , Particularly preferably 30-40kg/m 3.

[0044] As far as the present invention is concerned, the rigid foam prepared by the present invention is preferably a foam with a compressive stress or compressive strength of greater than or equal to 150 kPa, particularly preferably greater than or equal to 180 kPa, according to GB/T8813-2008 at 10% compression.

[0045] As far as the present invention is concerned, the rigid foam prepared by the present invention is preferably a foam with an oxygen index of greater than 26, particularly preferably greater than 30, according to GB/T2406-2009.

[0046] As far as the present invention is concerned, according to the GB/T8625-2005 test, the average flue gas temperature of the rigid polyurethane foam prepared by the present invention is lower than 200°C, and the average combustion residue is greater than 150mm.

[0047] As far as the present invention is concerned, according to the GB/T8626-2007 test, the rigid polyurethane foam prepared by the present invention has a flame height of no more than 15 cm.

[0048] As far as the present invention is concerned, according to the GB/T8627-2007 test, the smoke density rating of the rigid polyurethane foam prepared by the present invention is less than 75.

[0049] As far as the present invention is concerned, according to the GB/T8626 test, the rigid polyurethane foam prepared by the present invention satisfies ignition time=30s, Fs≤150mm in 60s, and no burning drips in 60s to ignite the filter paper.

[0050] As far as the present invention is concerned, according to the GB/T20284 test (SBI), the rigid polyurethane foam prepared by the present invention satisfies FIGRA≤250W/s, LFS

[0051] As far as the present invention is concerned, the rigid polyurethane foam prepared by the present invention meets the above-mentioned testing standards and is classified as a Class B1 flame retardant material.

Example Embodiment

[0052] Example 1

[0053] A polyurethane combined polyether, comprising component A; said component A includes the following components in parts by weight: 30 parts by weight of melamine polyol, 30 parts of phosphorus-containing polyester diol, and 10 parts of smoke suppressant flame retardant , 10 parts of physical blowing agent, 1 part of foam stabilizer, 1 part of chemical blowing agent and 2 parts of catalyst;

[0054] Melamine polyols are polyols similar to polybasic melamine as the initiator, with a hydroxyl value of 210±10mgKOH/g, a viscosity of 6000±1000mPa·s/25°C, and an acid value of ≤1.0mgKOH/g;

[0055] The phosphorus-containing polyester diol is a phosphorus-containing aromatic diol. The phosphorus-containing aromatic diol has a hydroxyl value of 190-200mgKOH/g, a viscosity of 2000-3500MPa·s/25°C, and an acid value of ≤1mgKOH /g;

[0056] The smoke-suppressing flame retardant is FR808, which is a commercial product of Qingdao Lianmei Chemical Co., Ltd.;

[0057] The physical blowing agent is one or more of HCFC141B, HFC-134a, HFC-245fa, and HFO-1233zd;

[0058] The foam stabilizer is one or more of Air LK443, Air LK221, Demei AK-8805 and Evonik B8462;

[0059] The chemical blowing agent is deionized water;

[0060] The catalyst is a combination of two or more of PC-5, PC-9, PC-41, PC-77, PT-303, PT-304, K-15, and JXP-508.

Example Embodiment

[0061] Example 2

[0062] A polyurethane combined polyether, comprising component A; said component A comprises the following components in parts by weight: 70 parts of melamine polyol, 70 parts of phosphorous polyester diol, and 20 parts of smoke suppressant flame retardant , 20 parts of physical blowing agent, 3 parts of foam stabilizer, 2 parts of chemical blowing agent and 5 parts of catalyst;

[0063] Melamine polyols are polyols similar to polybasic melamine as the initiator, with a hydroxyl value of 210±10mgKOH/g, a viscosity of 6000±1000mPa·s/25°C, and an acid value of ≤1.0mgKOH/g;

[0064] The phosphorus-containing polyester diol is a phosphorus-containing aromatic diol. The phosphorus-containing aromatic diol has a hydroxyl value of 190-200mgKOH/g, a viscosity of 2000-3500MPa·s/25°C, and an acid value of ≤1mgKOH /g;

[0065] The smoke-suppressing flame retardant is FR808, which is a commercial product of Qingdao Lianmei Chemical Co., Ltd.;

[0066] The physical blowing agent is one or more of HCFC141B, HFC-134a, HFC-245fa, and HFO-1233zd;

[0067] The foam stabilizer is one or more of Air LK443, Air LK221, Demei AK-8805 and Evonik B8462;

[0068] The chemical blowing agent is deionized water;

[0069] The catalyst is two or more of PC-5, PC-9, PC-41, PC-77, PT-303, PT-304, K-15, and JXP-508.

PUM

Property	Measurement	Unit
Density	30.0 ~ 50.0	kg/m³
Acid value	<= 1.0	mgKOH/g
Hydroxyl value	190.0 ~ 200.0	mgKOH/g

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High-selectivity reactor and method for preparing butanedioic anhydride through maleic anhydride liquid-phase hydrogenation

InactiveCN114452902Agood choiceLarge heat capacity

Owner:DALIAN UNIV OF TECH +2

Classification and recommendation of technical efficacy words

Large heat capacity

Polyurethane composite polyether, polyurethane rigid foam and preparation method of polyurethane rigid foam

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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