News Details
Crosslinking agent of urea-formaldehyde resin paint
2017-7-28 11:46:49
Crosslinking agent of urea-formaldehyde resin paint
Polyvinyl acetate emulsion can be used as the main component or modifier of urea-formaldehyde resin crosslinking agent.
To investigate the effects of polyvinyl acetate emulsion and formaldehyde capture agent A on the properties of urea-formaldehyde resin. Using modified poly vinyl acetate emulsion, formaldehyde capture agent, A nonionic surfactant and other additives made A kind of cold press type urea-formaldehyde resin crosslinking agent, and the determination of the pH value of urea-formaldehyde resin, crosslinking time and cold bonding strength.
Results show that the urea-formaldehyde resin crosslinking agent to improve crosslinking properties of urea-formaldehyde resin and adhesive properties, but also pointed out that the urea formaldehyde resin, crosslinking agent and ratio of urea formaldehyde resin with 10% ~ 15% advisable, A formaldehyde capture agent dosage to the crosslinking agent of poly vinyl acetate emulsion should be 20% ~ 40% of the quality.
The crosslinking process of urea formaldehyde resin (hereinafter referred to as UF resin) affects not only the quality of the plywood, but also the production efficiency of the artificial plate. Generally, the pH value of the finished UF resin is between 715 ~ 810. In such an alkaline condition, the resin light can not be fully cross-linked by the acidity of the wood itself.
Therefore, in order to shorten the crosslinking time and improve production efficiency, and makes the bond strength of resin can achieve certain, when using UF resin have to join a certain amount of crosslinking agent to promote the condensation of resin, crosslinking, commonly used crosslinking agent mainly has two kinds of acid and acid salt: acids crosslinking agent such as oxalic acid, phosphoric acid, citric acid, hydrochloric acid, acid salt crosslinking agent of ammonium chloride, ammonium sulfate, zinc chloride, aniline hydrochloride, etc.
Domestic general use ammonium chloride as crosslinking agent, this is due to the above all kinds of acid can make adhesive solution pH value fall so fast, resin applicable period short, agglutination intensity with the increase of aging time is reduced, and the price of ammonium chloride is low, easy to use, the application of the resin phase and the crosslinking time appropriate, so widely used. In addition, the cross-linking mechanism of UF resin was studied, and the multi-component crosslinking agent, microcapsule crosslinking agent and latent coupler were also issued.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
Polyvinyl acetate emulsion can be used as the main component or modifier of urea-formaldehyde resin crosslinking agent.
To investigate the effects of polyvinyl acetate emulsion and formaldehyde capture agent A on the properties of urea-formaldehyde resin. Using modified poly vinyl acetate emulsion, formaldehyde capture agent, A nonionic surfactant and other additives made A kind of cold press type urea-formaldehyde resin crosslinking agent, and the determination of the pH value of urea-formaldehyde resin, crosslinking time and cold bonding strength.
Results show that the urea-formaldehyde resin crosslinking agent to improve crosslinking properties of urea-formaldehyde resin and adhesive properties, but also pointed out that the urea formaldehyde resin, crosslinking agent and ratio of urea formaldehyde resin with 10% ~ 15% advisable, A formaldehyde capture agent dosage to the crosslinking agent of poly vinyl acetate emulsion should be 20% ~ 40% of the quality.
The crosslinking process of urea formaldehyde resin (hereinafter referred to as UF resin) affects not only the quality of the plywood, but also the production efficiency of the artificial plate. Generally, the pH value of the finished UF resin is between 715 ~ 810. In such an alkaline condition, the resin light can not be fully cross-linked by the acidity of the wood itself.
Therefore, in order to shorten the crosslinking time and improve production efficiency, and makes the bond strength of resin can achieve certain, when using UF resin have to join a certain amount of crosslinking agent to promote the condensation of resin, crosslinking, commonly used crosslinking agent mainly has two kinds of acid and acid salt: acids crosslinking agent such as oxalic acid, phosphoric acid, citric acid, hydrochloric acid, acid salt crosslinking agent of ammonium chloride, ammonium sulfate, zinc chloride, aniline hydrochloride, etc.
Domestic general use ammonium chloride as crosslinking agent, this is due to the above all kinds of acid can make adhesive solution pH value fall so fast, resin applicable period short, agglutination intensity with the increase of aging time is reduced, and the price of ammonium chloride is low, easy to use, the application of the resin phase and the crosslinking time appropriate, so widely used. In addition, the cross-linking mechanism of UF resin was studied, and the multi-component crosslinking agent, microcapsule crosslinking agent and latent coupler were also issued.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
This paper USES the modified poly (vinyl acetate emulsion (PVAc), A formaldehyde capture agent, nonionic surface active agent and other additives makes A cold press type UF resin crosslinking agent, the crosslinking agent, acidic, contain A variety of active functional groups such as hydroxyl (OH), hydroxymethyl (-) CH2OH, amide (CONH -) and unsaturated double bond, etc. The effect of the crosslinking agent on the properties of UF resin was investigated by changing the ratio of crosslinking agent to UF resin and the dosage of formaldehyde capture agent A.
Materials and instruments. PVAc lotion, homemade; UF resin, industrial products; Formaldehyde capture agent A, industrial products; Non-ionic surfactant, chemical purity; Additive, analytical pure; Silicone oil, industrial products; Ammonium chloride (NH4Cl), pure analysis. Thermostatic water bath pan, AG - 50KN universal mechanical testing machine, stopwatch, etc.
Preparation of common crosslinking agent and UF resin. ? : take the appropriate amount of UF resin and NH4Cl (1 % of UF resin quality). Stir well.
Preparation and cooperation of cold pressure crosslinking agent and UF resin. Preparation of UF resin: o: take UF resin, distilled water, silicon oil a little, and stir well. The preparation of cold compressive crosslinking agent: an adequate amount of PVAc emulsion, distilled water, formaldehyde capture agent A, additive, non-ionic surfactant, silicone oil, and uniform mixing; The amount of formaldehyde capture agent A was 0%, 10%, 20%, 30%, 40% and 50% of the quality of PVAc emulsion. 1 121213 cold compressive crosslinking agent with UF resin with 1:10 o and 20 o mixing, stirring evenly.
Mix well with 2:10 o and 15 o. Mix well. Blend with 3:10 o and 10 o. Mix well. Mix well with 4:10 o and 5 o. Mix well. All the above are of quality. Performance detection 11311 pH was determined by precise pH test paper.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
This paper USES the modified poly (vinyl acetate emulsion (PVAc), A formaldehyde capture agent, nonionic surface active agent and other additives makes A cold press type UF resin crosslinking agent, the crosslinking agent, acidic, contain A variety of active functional groups such as hydroxyl (OH), hydroxymethyl (-) CH2OH, amide (CONH -) and unsaturated double bond, etc. The effect of the crosslinking agent on the properties of UF resin was investigated by changing the ratio of crosslinking agent to UF resin and the dosage of formaldehyde capture agent A.
Materials and instruments. PVAc lotion, homemade; UF resin, industrial products; Formaldehyde capture agent A, industrial products; Non-ionic surfactant, chemical purity; Additive, analytical pure; Silicone oil, industrial products; Ammonium chloride (NH4Cl), pure analysis. Thermostatic water bath pan, AG - 50KN universal mechanical testing machine, stopwatch, etc.
Preparation of common crosslinking agent and UF resin. ? : take the appropriate amount of UF resin and NH4Cl (1 % of UF resin quality). Stir well.
Preparation and cooperation of cold pressure crosslinking agent and UF resin. Preparation of UF resin: o: take UF resin, distilled water, silicon oil a little, and stir well. The preparation of cold compressive crosslinking agent: an adequate amount of PVAc emulsion, distilled water, formaldehyde capture agent A, additive, non-ionic surfactant, silicone oil, and uniform mixing; The amount of formaldehyde capture agent A was 0%, 10%, 20%, 30%, 40% and 50% of the quality of PVAc emulsion. 1 121213 cold compressive crosslinking agent with UF resin with 1:10 o and 20 o mixing, stirring evenly.
Mix well with 2:10 o and 15 o. Mix well. Blend with 3:10 o and 10 o. Mix well. Mix well with 4:10 o and 5 o. Mix well. All the above are of quality. Performance detection 11311 pH was determined by precise pH test paper.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian