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A kind of phenolic resin for impregnation, its preparation method and application

A technology of phenolic resin and impregnation solution, which is applied in the field preparation of building components, non-fiber pulp addition, wax addition, etc. It can solve the problems of reduced quality of film paper, low solid content, uneven color, etc., to ensure resin performance , uniform and full color, and uniform molecular weight

Active Publication Date: 2019-04-23
广州市长安粘胶制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary phenolic resin is used as the impregnating resin. Due to the high degree of polycondensation and crosslinking of the resin molecules, the molecular weight of the resin is relatively large, but its solid content is low and its permeability is poor, making it difficult to penetrate into the paper when producing film paper. The core layer of the film paper is prone to lack of glue and less glue, resulting in a decrease in the quality of the film paper
At present, most of the impregnated film papers have disadvantages such as low amount of impregnated glue, poor gloss, poor hiding, uneven color, unsightly appearance, and poor wear resistance.

Method used

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  • A kind of phenolic resin for impregnation, its preparation method and application
  • A kind of phenolic resin for impregnation, its preparation method and application
  • A kind of phenolic resin for impregnation, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] An embodiment of the impregnating phenolic resin described in the present invention. In the present embodiment, the synthetic method of described phenolic resin for impregnating comprises the following steps:

[0067] (1) After adding the first batch of formaldehyde and the first batch of liquid caustic soda, add water, add the first batch of urea after stirring for 5 minutes, and continue stirring;

[0068] (2) Add phenol, add the remaining liquid caustic soda, and control the temperature during the feeding process not to exceed 65°C;

[0069] (3) Slowly add the remaining formaldehyde after adding the liquid caustic soda, and control the temperature not to exceed 75°C during the feeding process;

[0070] (4) Allow the exothermic reaction to slowly heat up to 78°C, heat the reaction at 78°C until the viscosity reaches 20-24 seconds / 35°C B4, and immediately cool down;

[0071] (5) When the temperature is lowered to 70°C, add the remaining urea and cool to below 30°C; ...

Embodiment 2

[0076] An embodiment of the impregnating phenolic resin described in the present invention. In the present embodiment, the synthetic method of described phenolic resin for impregnating comprises the following steps:

[0077] (1) After adding the first batch of formaldehyde and the first batch of liquid caustic soda, add water, add the first batch of urea after stirring for 5 minutes, and continue stirring;

[0078] (2) Add phenol, add the remaining liquid caustic soda, and control the temperature during the feeding process not to exceed 65°C;

[0079] (3) Slowly add the remaining formaldehyde after adding the liquid caustic soda, and control the temperature not to exceed 75°C during the feeding process;

[0080] (4) Allow the exothermic reaction to slowly heat up to 85°C, heat the reaction at 82°C until the viscosity reaches 20-24 seconds / 35°C B4, and immediately cool down;

[0081] (5) When the temperature is lowered to 80°C, add the remaining urea and cool to below 30°C; ...

Embodiment 3

[0086] An embodiment of the impregnating phenolic resin described in the present invention. In the present embodiment, the synthetic method of described phenolic resin for impregnating comprises the following steps:

[0087] (1) After adding the first batch of formaldehyde and the first batch of liquid caustic soda, add water, add the first batch of urea after stirring for 5 minutes, and continue stirring;

[0088] (2) Add phenol, add the remaining liquid caustic soda, and control the temperature during the feeding process not to exceed 65°C;

[0089] (3) Slowly add the remaining formaldehyde after adding the liquid caustic soda, and control the temperature not to exceed 75°C during the feeding process;

[0090] (4) Allow the exothermic reaction to slowly heat up to 82°C, heat the reaction at 82°C until the viscosity reaches 20-24 seconds / 35°C B4, and immediately cool down;

[0091] (5) When the temperature is lowered to 75°C, add the remaining urea and cool to below 30°C; ...

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Abstract

The invention discloses impregnating phenolic resin with high solid content and low cost and a preparation method thereof, and also discloses a phenolic resin impregnation liquid containing the impregnating phenolic resin. The phenolic resin impregnation liquid is low in molecular weight and good in permeability and stability. The invention also discloses phenolic resin impregnated bond paper containing the phenolic resin impregnation liquid, and the phenolic resin impregnated bond paper is uniform and full in color, good in lustrousness, high in coverage rate and excellent in wear resistance. Besides, the invention discloses an impregnated bond paper veneer cement template containing the phenolic resin impregnated bond paper.

Description

technical field [0001] The invention relates to a phenolic resin, in particular to a phenolic resin for impregnation, its preparation method and application. Background technique [0002] Phenolic resin impregnated film paper is a kind of veneer paper impregnated with phenolic resin, which is mainly used in the production of high-grade concrete formwork. Compared with resin-decorated concrete formwork and melamine-impregnated paper concrete formwork, phenolic resin-impregnated paper cement formwork is more durable , wear resistance, water resistance, high strength, small deformation, and many turnover times, which create necessary conditions for improving the surface quality of concrete and realizing the construction technology of clear water surface concrete, and are widely used in the construction industry. [0003] The current impregnated film paper is a kind of impregnated paper obtained by impregnating various special papers with synthetic resin, so that the resin penet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/08D21H17/49D21H17/60D21H17/13D21H17/59E04G9/02
CPCC08G14/08D21H17/13D21H17/49D21H17/59D21H17/60E04G9/021
Inventor 邱海文
Owner 广州市长安粘胶制造有限公司