Preparation method of phenolic resin for auto-industry filter paper
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A technology of the automobile industry and phenolic resin, which is applied in the field of preparation of phenolic resin, and can solve the problems of poor flame retardancy and the like
Active Publication Date: 2012-03-28
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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The test of combustible materials is determined by the flame retardant performance experiment, the reaction to ignition with a small flame, the edge burns, and the flame retardancy is poor
Method used
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Embodiment 1
[0027] Phenol 940g (10mol), the concentration is 37% formaldehyde 1621.6g (2.0mol), add sodium hydroxide 14.1g, slowly heat up to 75 ℃, constant temperature reaction for 2 hours, add melamine 188g, constant temperature for 45 minutes, vacuum distillation to moisture content 7.5 %, add 400g of methanol, 400g of tetrahydrofuran, and 94g of triphenyl phosphate, stir and dissolve, evenly cool down to 40°C and discharge.
Embodiment 2
[0029] Phenol 940g (10mol), the concentration is 37% formaldehyde 1621.6g (2.0mol), add sodium hydroxide 14.1g, slowly heat up to 75-80 ℃, constant temperature reaction for 2 hours, add dicyandiamine 188g, constant temperature for 45 minutes, vacuum Distill to a water content of 7.5%, add 400g of methanol, 400g of tetrahydrofuran, and 188g of triphenyl phosphate, stir and dissolve evenly, cool down to 40°C and discharge.
Embodiment 3
[0031] Phenol 940g (10mol), concentration 37% formaldehyde 1621.6g (2.0mol), add sodium hydroxide 14.1g, slowly heat up to 78 ℃, constant temperature reaction for 2 hours, add melamine 376g, constant temperature for 45 minutes, vacuum distillation to moisture content 7.5 %, add 400g of methanol, 400g of tetrahydrofuran, and 94g of triphenyl phosphate, stir and dissolve, evenly cool down to 40°C and discharge.
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Abstract
The invention discloses a preparation method of a phenolic resin for auto-industry filter paper, which comprises the following steps: 1) aldehyde and phenol are subjected to a polycondensation reaction according to a molar ratio of 1.2 to 2.5:1 when the pH value is 7.5 to 9.0; 2) to a polycondensation product in the first step, an amine substance accounting for 20 to 60% of the mass of phenol is added, and the resultant product is stirred for 0.5 to 2hr at a temperature of 75 to 80 DEG C; 3) a product in the second step is subjected to vacuum distillation until the content of water is less than 7.5wt%; and an organic solvent is added for dilution, and a phosphate material is added, and then uniform mixing and cooling are carried out. The phenolic resin synthesized by the method provided by the invention can be used for auto-industry filter paper, and the flame retardancy of the industrial filter paper is improved.
Description
technical field [0001] The invention relates to the technical field of automobile industry filter paper, in particular to a preparation method of phenolic resin used for automobile industry filter paper. Background technique [0002] Automotive industry filter paper is a general term for air filter paper, oil filter paper and fuel filter paper. Its main purpose is to filter dust and impurities on engine air intake, engine oil and fuel, and reduce wear and tear on key components of the engine. Air filter paper is a filter that separates impurities in the air; in recent years, air filter paper combustion accidents have occurred frequently due to cylinder high temperature, hot gas backflow, etc. The flame retardant performance has put forward the requirement. At present, companies such as FiberMark Gessner of Germany and HV of the United States have successively launched air filter paper with excellent flame retardant performance and environmental protection. A small number ...
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Application Information
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