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Preparation method of phenolic resin type surfactant and prepared phenolic foam plastic

A technology of phenolic foam plastics and surfactants, applied in the field of phenolic foam plastics, can solve problems affecting water absorption, thermal conductivity and strength, and the stability of foam closed cells, forming foams, etc., to achieve low water absorption, stable structure, The effect of low thermal conductivity

Active Publication Date: 2017-06-09
北京傲德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

As a surfactant that stabilizes the foam during the molding process of phenolic foam, it has a vital impact on the formation of the foam, the closed cell ratio of the foam, and the stability of the formed foam. The traditional surfactant components do not react with the resin. , it exists in the system in a free state after playing the role of stabilizing the foam, which affects the closed cell rate of the foam and the stability of the formed foam, and then affects the water absorption, thermal conductivity and strength, etc.

Method used

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  • Preparation method of phenolic resin type surfactant and prepared phenolic foam plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Each raw material proportioning by weight of described phenolic resin type surfactant is as follows:

[0066] 30 parts of alkylphenol

[0067] 70 parts of phenol

[0068] Paraformaldehyde 42 parts

[0069] 1 part of 30% sodium hydroxide solution;

[0070] urea 5 parts

[0071] 4 parts water

[0072] Preparation process: Mix 300g of nonylphenol and 210g of phenol into the reactor, add 210g of paraformaldehyde and 40g of water, stir evenly, adjust the pH to 8.0 with 30% sodium hydroxide solution, and raise the temperature to 78~ Pre-polymerize alkylphenols and aldehydes at a constant temperature of 82°C for 40 minutes, then add the remaining 490g of phenol and 210g of paraformaldehyde and continue to heat up to 90°C until the viscosity reaches 9000±1000cp. Prepared phenolic resin type surfactant.

[0073] Prepare phenolic foam plastics with above-mentioned phenolic resin type surfactant, raw material proportioning is as follows by weight;

[0074] 90 parts of conve...

Embodiment 2

[0080] Raw material and preparation method identical proportioning with embodiment 1 prepare phenolic resin type surfactant;

[0081] Phenolic foam plastics are prepared according to the following proportions by weight of raw materials:

[0082] Conventional phenolic resin 80 parts

[0083] 20 parts of phenolic resin type surfactant

[0084] Foaming agent 6.3 parts

[0085] Curing agent 17 parts

[0086] Described foam preparation process is identical with embodiment 1; Increased the consumption of described phenolic resin type surfactant in the weight ratio, because the molecular weight of phenolic resin type surfactant is bigger, so the active group of unit weight is relatively conventional phenolic resin With less resin, the required curing dosage is correspondingly reduced; when the dosage of phenolic resin type surfactant increases, the viscosity of the system increases accordingly, so the dosage of foaming agent needs to be increased correspondingly to meet the foamin...

Embodiment 3

[0088] Raw material and preparation method identical proportioning with embodiment 1 prepare phenolic resin type surfactant;

[0089] Phenolic foam plastics are prepared according to the following proportions by weight of raw materials:

[0090] Conventional phenolic resin 75 parts

[0091] 25 parts of phenolic resin type surfactant

[0092] Foaming agent 6.8 parts

[0093] Curing agent 16 parts

[0094] The preparation process of the phenolic foam plastic is the same as in Example 1.

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Abstract

The invention relates to a phenolic-resin-type surfactant for phenolic foam plastic and a preparation method thereof. The surfactant is a phenolic resin synthesized from phenols and aldehydes with lipophilic fat long chains; and the fat carbon chain on the phenolic resin molecule branched chain has favorable lipophilicity, and thus, the phenolic resin can be used as a surfactant for phenolic foam. The surfactant is synchronously cured with the phenolic resin after finishing the emulsifying effect, and does not exist in the free state, thereby becoming one component of the phenolic foam high-polymer chain segment. When the phenolic resin used as the phenolic foaming surfactant is blended with the conventional phenolic resin to prepare the phenolic foam plastic, the phenolic foam, which is foamed and cured by adding the foaming agent and curing agent, can obviously lower the water absorptivity of the foam and enhance the heat insulativity and strength of the foam.

Description

technical field [0001] The invention relates to the field of new phenolic energy-saving and thermal insulation materials, in particular to a preparation method of a phenolic resin type surfactant and a prepared phenolic foam plastic. [0002] technical background [0003] Phenolic foam inherits the flame retardancy and structural stability of phenolic resin itself. It has the characteristics of fire resistance and flame retardancy, no dripping in case of fire, good dimensional stability in alternating hot and cold environments, and acid and alkali corrosion resistance. In recent years, it has been used in building energy saving The field has made great progress. However, existing phenolic foams have defects such as rapid decay of thermal insulation, low strength, and high volumetric water absorption to varying degrees. As a surfactant that stabilizes the foam during the phenolic foam molding process, it has a vital impact on the formation of the foam, the closed cell ratio o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/24C08L61/06C08J9/14
Inventor 朱佑平郭创洲
Owner 北京傲德新材料科技有限公司
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