Method for preparing glass steel phenolic resin substrate

A technology of phenolic resin and fiberglass, which is applied in the field of phenolic resin, can solve the problems of low reactivity and slow curing speed, and achieve the effects of low smoke density, good mechanical properties and good fire resistance

Active Publication Date: 2011-10-19
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In synthetic resins, phenolic resin is generally used as the base material to make FRP. Compared with traditional unsaturated polyester resin FRP, phenolic resin FRP products have better fire and flame retardant performance, but due to the curing speed of phenolic resin is slower than that of unsa

Method used

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  • Method for preparing glass steel phenolic resin substrate

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Experimental program
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Effect test

Embodiment 1

[0029] With 80kg of phenol, 20g of resorcinol, 180kg of formaldehyde (36%), 2kg of sodium hydroxide, join in the reactor successively, be warming up to 50 ℃, constant temperature reaction 6 hours, add 1.5kg phosphoric acid in the gained reaction mixture, reduce Pressure distillation, the temperature of the vacuum distillation is controlled at 38-40°C, the vacuum degree is -0.98MPa--0.94MPa, and the pressure distillation is carried out until the viscosity is 1500cp / 25°C to obtain a phenolic resin product.

[0030] The resin prepared in this embodiment has a solid content of 63% and a moisture content of 16%.

[0031] Add sulfurous acid to the phenolic resin product prepared above, and stir evenly according to the weight ratio of phenolic resin to sulfurous acid of 70:30.

Embodiment 2

[0033] 75kg of cresol, 25g of o-cresol, 200kg of paraformaldehyde (36%), and 1.5kg of alkylamine were successively added to the reaction kettle, the temperature was raised to 70°C, and the temperature was reacted for 7 hours, and 1.5kg of the resulting reaction mixture was added to mix Acid, vacuum distillation, the temperature of vacuum distillation is controlled at 40-42°C, the vacuum degree is -0.98MPa--0.94MPa, the vacuum distillation is until the viscosity is 2000cp / 25°C, and the phenolic resin product is obtained.

[0034] The resin prepared in this embodiment has a solid content of 71% and a moisture content of 14.5%.

[0035] Add oxalic acid to the phenolic resin product prepared above, and stir evenly according to the weight ratio of phenolic resin to oxalic acid 99.5:0.5.

Embodiment 3

[0037] 70kg of naphthol, 30g of pyrocatechol, 10g of cresol, propionaldehyde (36%), 180kg, and 1.6kg of sodium hydroxide were successively added to the reactor, and the temperature was raised to 80°C for constant temperature reaction for 5 hours, and the resulting reaction mixture was Add 1.5kg of mixed acid to the mixture, distill under reduced pressure, control the temperature of the reduced-pressure distillation to 41-43°C, the vacuum degree is -0.98MPa--0.94MPa, and distill under reduced pressure until the viscosity is 3000cp / 25°C to obtain the phenolic resin product.

[0038] The resin prepared in this embodiment has a solid content of 75% and a moisture content of 9%.

[0039] Add ammonium monohydrogen phosphate to the phenolic resin product prepared above, and stir evenly according to the weight ratio of phenolic resin to ammonium monohydrogen phosphate of 80:20.

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Abstract

The invention discloses a method for preparing a glass steel phenolic resin substrate, which comprises the following steps of: 1, putting phenol, aldehyde and alkali into a reaction kettle in a molar ratio of 1.0:(1.5-3.0):(0.001-0.1) and performing polycondensation reaction; 2, adding a pH value regulator into a product in the step 1 to regulate the pH value to 3 to 9, and distilling under reduced pressure until the viscosity of the product is between 1,000 and 3,000 centipoises at 25 DEG C; and 3, adding acidic components into the product in the step 2, and stirring uniformly, wherein a weight percent ratio of the acidic components to the product is (70-99.5):(0.5-30). The phenolic resin substrate prepared by the method is mainly used for manually-molded glass steel, and can be solidified at normal temperature, so energy is saved to a great degree, labor intensity is reduced, and the aims of energy conservation and consumption reduction are fulfilled.

Description

technical field [0001] The invention relates to the technical field of phenolic resins, in particular to a method for preparing a phenolic resin substrate for glass fiber reinforced plastics. Background technique [0002] FRP, the scientific name of glass fiber reinforced plastics, is a composite reinforced plastic material that uses glass fiber and its products, such as glass cloth, tapes, felts, yarns, etc. as reinforcing materials, and synthetic resin as a matrix material. FRP products are much better than traditional products in terms of performance, use, and lifespan. They are easy to shape, customizable, and can be freely adjusted in color. They are favored by merchants and sellers, occupying an increasing market share, and have a bright future. . [0003] The development of FRP business, as a reinforcing material for plastic substrates, has expanded from glass fiber to carbon fiber, boron fiber, aramid fiber, alumina fiber and silicon carbide fiber. In synthetic res...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08G8/04C08G8/24C08K7/14
Inventor 唐一林江成真李枝芳殷德刚张宝印
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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