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Preparation method of semi-hard melamine foam

A melamine and semi-rigid technology, applied in the field of semi-rigid melamine foam preparation, can solve the problems of semi-rigid melamine foam preparation without any reports

Inactive Publication Date: 2016-07-06
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no report on the preparation of semi-rigid melamine foamed plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 2000g of melamine, 1200g of 37% formaldehyde solution, 900g of paraformaldehyde, and 200g of hydroxyethoxyethyl melamine into the reactor, stir and heat. After the solution becomes transparent, adjust the pH to 8.5-10, and react at 85-95°C for 2 hours , when the resin reaches the corresponding cloud point, a special resin for semi-rigid melamine foam is prepared.

[0023] Add 1000g of resin, 15g of sodium dodecylbenzenesulfonate, 10g of Tween, 50g of pentane, and 20g of formic acid into a high-speed mixer, and after high-speed stirring, a semi-rigid melamine foam foaming liquid is obtained.

[0024] The foaming solution is foamed by microwave special foaming equipment for 2 to 10 minutes, and then treated at a high temperature of 150 to 200°C for 20 to 40 minutes to obtain a semi-rigid melamine foam. Foam density 14.7kg / m 3 , Tensile strength 124kpa, compressive strength (40%) 45kpa.

Embodiment 2

[0026] Add 2000g of melamine, 1200g of 37% formaldehyde solution, 900g of paraformaldehyde, and 300g of methylmelamine into the reactor, stir and heat, and after the solution becomes transparent, adjust the pH to 8.5-10, and react at 85-95°C for 2 hours to obtain semi- Special resin for rigid melamine foam.

[0027] Add 1000g of resin, 15g of sodium dodecylbenzene sulfonate, 10g of polyether block, 10g of dodecyl alcohol, 80g of alkoxyfluoroalkane, 30g of mixed acid of formic acid and phosphoric acid into a high-speed mixer and stir at high speed. The foaming equipment foams for 2-10 minutes, and after 150-200°C high-temperature treatment for 20-40 minutes, the semi-rigid melamine foam is prepared. Foam density 19.7kg / m 3 , Tensile strength 136kpa, compressive strength (40%) 60kpa.

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Abstract

The invention discloses a preparation method of semi-hard melamine foam. The preparation method comprises the following steps: preparing semi-hard melamine foam plastic dedicated resin from raw materials such as melamine, formaldehyde, modified monomers, and the like, through in-situ synthesis; then adding resin, an emulsifier, a foam stabilizer, a foaming agent, an auxiliary agent, and a curing agent into a special mixing apparatus such as a screw extruder, mixing the components mentioned above to prepare a foaming liquid; and subjecting the foaming liquid to microwave foaming and a high temperature post treatment so as to produce the semi-hard melamine foam.

Description

technical field [0001] The invention relates to the field of new polymer materials, in particular to a preparation method of semi-rigid melamine foam. Background technique [0002] As a new type of polymer foam, melamine foam is widely used in construction, petrochemical, transportation, aerospace, electronic information, military, etc. and other fields have been widely used. [0003] At present, the research on melamine foam mainly focuses on soft foam (density ≤ 10kg / m 3 ) and rigid foam (density> 30kg / m 3 )aspect. 其中US4666948A、EP0017671B1、DE870027、CN103097442A、CN104029326A、CN104031284A、CN201210010627.6、CN200810049126.2、CN200910263526.8、CN200780011962.5、CN201210529428.6等专利主要报道了软质三聚氰胺泡沫的研究结果;而CN201210130457.5、 CN201210540436.0, CN201210328428.X, CN103146016 and other patents report the preparation method of rigid melamine foam board. [0004] There is no report on the preparation of semi-rigid melamine foamed plastics. Contents of the invention [0005] The object...

Claims

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Application Information

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IPC IPC(8): C08L61/32C08J9/08C08J9/14C08J3/03C08G12/40
CPCC08G12/40C08J3/03C08J9/141C08J9/146C08J2203/14C08J2203/142C08J2361/32C08L61/32C08L2201/54C08L2203/14
Inventor 刘绍英李子健王公应
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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