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All-water-blown asphalt-polyurethane hard foam and preparation method thereof

A rigid foam, all-water foaming technology, applied in the field of polyurethane, can solve the problems of cyclopentane foaming agent being inflammable and explosive, not meeting environmental protection requirements, and high equipment requirements, achieving good waterproof and anti-corrosion performance, and solving rough skin. , the effect of high mechanical strength

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, halogenated hydrocarbon blowing agents such as HCFC-141b and dichloromethane are volatile at room temperature. Although they can make the product have a good skin and a good feel when the density requirement is met, they do not meet environmental protection requirements.
In addition, cyclopentane blowing agent is flammable and explosive, is a dangerous product, and has high requirements for equipment

Method used

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  • All-water-blown asphalt-polyurethane hard foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 80 parts of petroleum asphalt with a penetration of 8mm and a softening point of 48°C into the reactor, heat to melt and stir, raise the temperature to 200°C and keep it for about 1 hour, then add 35 parts of castor oil and 3.5 parts of glycerin After mixing evenly, gradually add it to the melted petroleum asphalt, and stir vigorously at 160°C for 1 hour to obtain a mixture of asphalt and castor oil;

[0040] (2) Add 80 parts of polyether polyol and 3 parts of plasticizer dioctyl phthalate to the mixed solution prepared in step (1), and continue stirring at 60°C for 2 hours to obtain a uniform mixture;

[0041] (3) Then add 6 parts of water, 3 parts of POLYCATSA-1, 12 parts of silicone foam stabilizer, and 30 parts of trichloroethyl phosphate into the mixture prepared in step (2), and stir evenly at 38°C;

[0042] (4) Add 115 parts of PAPI to the mixture prepared in step (3), stir at a high speed for about 40 seconds, then injection mold and foam, and after curi...

Embodiment 2

[0044] (1) Add 100 parts of petroleum asphalt with a penetration of 12mm and a softening point of 56°C into the reaction kettle, heat to melt and stir, raise the temperature to 200°C and keep it for about 1 hour, then add 50 parts of castor oil and 4 parts of glycerin After mixing evenly, gradually add it to the melted petroleum asphalt, and stir vigorously at 160°C for 1 hour to obtain a mixture of asphalt and castor oil;

[0045] (2) Add 80 parts of polyether polyol and 5 parts of plasticizer dioctyl phthalate to the mixed solution prepared in step (1), and continue stirring at 70°C for 2 hours;

[0046] (3) Then add 4.5 parts of water, 1 part of DABCODC-2, 8 parts of silicone foam stabilizer, and 25 parts of trichloroethyl phosphate to the mixture prepared in step (2), and stir evenly at 45°C;

[0047] (4) Add 130 parts of PAPI to the mixture prepared in step (3), stir at a high speed for about 40 seconds, then injection mold and foam, and after curing and molding, the asph...

Embodiment 3

[0049] (1) Add 60 parts of petroleum asphalt with a penetration of 18mm and a softening point of 41°C into the reactor, heat to melt and stir, raise the temperature to 200°C and keep it for about 1 hour, then gradually add 40 parts of castor oil to the melted In the petroleum asphalt, stir vigorously at 160°C for 1 hour to obtain a mixture of asphalt and castor oil;

[0050] (2) Add 80 parts of polyether polyol and 6 parts of plasticizer dioctyl phthalate to the mixed solution prepared in step (1), and continue stirring at 80°C for 2 hours;

[0051] (3) Then add 2.5 parts of water, 1 part of DABCODC-2, 8 parts of silicone foam stabilizer, and 20 parts of trichloropropyl phosphate to the mixture prepared in step (2), and stir evenly at 42°C.

[0052] (4) Add 110 parts of PAPI to the mixture prepared in step (3), stir at a high speed for about 40 seconds, then injection mold and foam, and after curing and molding, the asphalt polyurethane rigid foam C can be obtained.

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Abstract

The invention discloses an all-water-blown asphalt-polyurethane hard foam and a preparation method thereof. The preparation method comprises the following steps: (1) adding petroleum asphalt into a reactor, heating to melt petroleum asphalt, and gradually adding castor oil to obtain a mixed solution of asphalt and castor oil; (2) adding polyether polyol and a plasticizing agent into the mixed solution obtained in the step (1); (3) adding water and a solidification catalyst into the mixture obtained in the step (2); (4) adding polyisocyanate into the mixture prepared in the step (3) to carry out foaming, curing, and moulding. Castor oil is adopted to dissolved asphalt, organic solvent is not needed to prepare asphalt emulsifier, water with an ODP value of zero is taken as the foaming agent, and the prepared asphalt-polyurethane hard foam has the advantages of dampness and corrosion resistant property, strong pressure resistant performance, and high size stability.

Description

technical field [0001] The invention belongs to the field of polyurethane, and in particular relates to an all-water foamed asphalt polyurethane rigid foam and a preparation method thereof. Background technique [0002] Polyurethane rigid foam is an excellent thermal insulation material with excellent physical and mechanical properties and chemical resistance. It is widely used in many fields such as refrigerators, freezers, automobiles, buildings and pipeline insulation. However, due to the destructive effect of chlorofluorocarbon blowing agents on the atmospheric ozone layer, international conventions have made strict restrictions and regulations on their production and use. The all-water foaming technology uses water as a chemical blowing agent to replace the traditional chlorofluorocarbon physical blowing agent. In the preparation process of polyurethane rigid foam, the CO generated by the chemical reaction between water and isocyanate is used. 2 Foaming is a new enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L75/14C08K13/06C08K9/10C08K3/02C08K5/521C08K5/101C08J9/08C08G18/67C08G18/66C08G18/48
Inventor 马蕊英王海洋赵亮方向晨王刚
Owner CHINA PETROLEUM & CHEM CORP
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