Polystyrene/thermosetting resin syntactic foam and method for preparing same

A technology of composite foam plastic and polystyrene, applied in the field of flame retardant materials, can solve problems such as difficulty in solving the dripping of polystyrene foam plastic, and achieve the effects of solving burning dripping, low cost and high flame retardant performance

Inactive Publication Date: 2013-01-09
赵毅 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all greatly improve the flammability of polystyrene foam and improve the fire safety performance, but it is difficult to solve the dripping problem of polystyrene foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] General-purpose expandable polystyrene particles (grade R433, particle size 0.85-1.40 mm) were pre-foamed at 80°C for 25 minutes to obtain polystyrene beads with a particle size of 5-8 mm.

[0035] Add 40g of melamine, 60mL of 38wt% formaldehyde solution and 50mL of distilled water into a three-necked flask, adjust the pH to 8~9 with triethanolamine, and react at 70°C for 1h to obtain a viscous transparent melamine prepolymer solution. The solids content of the polymer solution was 43% by weight.

[0036] Weigh 30g of the above-mentioned melamine resin prepolymer, adjust the pH to 6 with dilute hydrochloric acid, and add it to 100g of the above-mentioned polystyrene beads (the quality of the polystyrene has little change before and after pre-foaming, and it can be considered that the polystyrene The mass of the bead is the mass of the expandable polystyrene particles), after mixing, add it to a mold of 100mm×100mm×200mm to fill and compact it, and mature it at 110°C for...

Embodiment 2

[0038] Flame-retardant expandable polystyrene particles (grade F403, particle size 0.85-1.40mm) were pre-expanded at 120°C for 5 minutes to obtain polystyrene beads with a particle size of 5-7mm.

[0039] Add 18g of urea and 60mL of 38wt% formaldehyde solution into a three-necked flask, adjust the pH to 8~9 with triethanolamine, and react at 70°C for 2 hours to obtain a viscous and transparent melamine prepolymer solution, the melamine prepolymer solution The solid content is 53 wt%.

[0040] Weigh 50g of the above-mentioned urea-formaldehyde resin prepolymer, adjust the pH to 6~6.5 with dilute hydrochloric acid, add it to 50g of the above-mentioned polystyrene beads, mix it and add it to a mold of 100mm×100mm×100mm to fill and compact it. Matured at 160°C for 5 minutes, the polystyrene / urea-formaldehyde resin composite foam was obtained. The composite foam did not drip when burned, and the limiting oxygen index was 26.6%.

Embodiment 3

[0042] General-purpose expandable polystyrene particles (brand R436, particle size 0.4-0.7 mm) were pre-expanded at 110°C for 15 minutes to obtain polystyrene beads with a particle size of 3-5 mm.

[0043] Weigh 130g of 38wt% formaldehyde solution, 100g of phenol that has been preheated to 70°C, 1.2g of zinc acetate, and 3.5g of 30% sodium hydroxide solution, put them in a 500ml three-necked flask, heat up to 95°C for 2.5h, then cool down to 55° C., water was evaporated in vacuum with a water pump to obtain a thermosetting phenolic prepolymer, and the solid content of the thermosetting phenolic prepolymer was 90 wt%.

[0044] Weigh 70g of the above-mentioned thermosetting phenolic resin prepolymer, add 2g of 50wt% sulfuric acid solution as a curing agent, stir and mix, add to 30g of the above polystyrene beads, mix and add to a mold of 100mm×100mm×50mm Compact and fill, and mature at 80°C for 30 minutes to obtain a polystyrene / phenolic resin composite foam, which does not drip...

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Abstract

The invention discloses polystyrene / thermosetting resin syntactic foam and a method for preparing the same, and belongs to the field of flame retardant materials. The formula of the syntactic foam comprises expandable polystyrene, resin monomers or prepolymers and a curing agent. The invention also discloses a method for preparing the syntactic foam. The preparation method comprises the following steps of: pre-foaming the expandable polystyrene particles to obtain polystyrene beads; and uniformly coating the polystyrene beads with the curing agent-contained resin monomers or prepolymers, and curing the polystyrene beads to obtain the syntactic foam. The syntactic foam can fundamentally solve the problem that the polystyrene is combusted and drips, has a high flame retardant property, and is low in cost and excellent in performance, so that the syntactic foam becomes a new selection for exterior wall heat-insulating materials.

Description

technical field [0001] The invention relates to a polystyrene / thermosetting resin composite foam plastic and a preparation method thereof, belonging to the field of flame-retardant materials. Background technique [0002] Polystyrene foam is made of polystyrene resin as the main body, adding foaming agent and other additives. It is currently the most widely used cushioning material. It has a closed-cell structure, low water absorption, and excellent water resistance; low density, generally 0.015-0.03; good mechanical strength, excellent cushioning performance; good processability, easy to mold; good colorability, strong temperature adaptability , Excellent anti-radiation and other advantages, and high dimensional accuracy, uniform structure. In addition, polystyrene foam is cheap and is currently the most widely used exterior wall insulation material in the world. [0003] However, polystyrene foam is extremely flammable and produces a large amount of dense smoke, and it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L63/00C08L63/02C08L61/06C08L61/10C08L61/24C08L61/28C08J9/36C08J9/228
Inventor 赵毅贺光庆
Owner 赵毅
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