阅读说明：本技术 一种固化剂及其含有该固化剂的三聚氰胺树脂组成物 (Curing agent and melamine resin composition containing same ) 是由 奚佳勇 于 2020-06-01 设计创作，主要内容包括：本发明涉及固化剂技术领域,更具体地,本发明提供了一种固化剂及其含有该固化剂的三聚氰胺树脂组成物。本发明第一方面提供一种固化剂,制备原料至少包括醇胺、无机碱以及无机酸；所述醇胺、无机碱以及无机酸的质量比为(5～9)：1：8。(The invention relates to the technical field of curing agents, and particularly provides a curing agent and a melamine resin composition containing the same. The invention provides a curing agent, which is prepared from at least alcohol amine, inorganic base and inorganic acid; the mass ratio of the alcohol amine to the inorganic base to the inorganic acid is (5-9): 1: 8.)

1. The curing agent is characterized in that the preparation raw materials at least comprise alcohol amine, inorganic base and inorganic acid; the mass ratio of the alcohol amine to the inorganic base to the inorganic acid is (5-9): 1: 8.

2. the curing agent of claim 1, wherein the alcohol amine is an alkyl alcohol amine.

3. The curing agent according to claim 2, wherein the alkyl alcohol amine is selected from one or more of mono-alkyl alcohol amine, di-alkyl alcohol amine, tri-alkyl alcohol amine.

4. The curing agent according to claim 3, wherein the mass ratio of the dialkanolamine to the trialkanolamine is (2-3): 1.

5. the curing agent according to claim 1, wherein the inorganic base is selected from one or more of ammonia, lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium carbonate, calcium bicarbonate, sodium carbonate, sodium bicarbonate, potassium carbonate, and potassium bicarbonate.

6. The curing agent according to claim 1, wherein the inorganic acid is selected from one or more of hydrochloric acid, sulfuric acid, phosphoric acid and nitric acid.

7. The curing agent according to claim 5, wherein the ammonia is a 20 wt% ammonia solution.

8. A method for preparing the curing agent according to any one of claims 1 to 7, comprising at least the steps of: adding the components into a reaction kettle, and uniformly stirring to obtain the product.

9. A melamine resin composition, characterized in that the raw materials for preparation comprise a melamine resin prepolymer and the curing agent of any one of claims 1 to 7.

10. The melamine resin composition according to claim 9, wherein the mass ratio of the melamine resin prepolymer to the curing agent is 100: (0.1-2).

Technical Field

The invention relates to the technical field of curing agents, and particularly provides a curing agent and a melamine resin composition containing the same.

Background

At present, the quality of the melamine impregnated paper in China is uneven, the difference of the use level of the melamine resin curing agent is large, general enterprises only use the melamine resin curing agent which is simply prepared by the general enterprises, the curing agent has a curing effect on glue at a low temperature, the produced impregnated paper is cured too early, the latency is low, some high-end enterprises adopt the imported curing agent with slightly high latency, the effect is good, but the effect is not changed fundamentally, and meanwhile, the curing agent of a certain brand is imported, so that once the goods are out of stock or broken, the risk to the enterprise production is high.

With the development of society, the market demand of melamine impregnated paper is getting larger and higher, and therefore a latent curing agent with high curing activity and good stability at normal temperature needs to be researched to meet the market demand.

Disclosure of Invention

In order to solve the above technical problems, a first aspect of the present invention provides a curing agent, which is prepared from at least alcohol amine, inorganic base and inorganic acid; the mass ratio of the alcohol amine to the inorganic base to the inorganic acid is (5-9): 1: 8.

as a preferred technical solution of the present invention, the alcohol amine is an alkyl alcohol amine.

As a preferable technical scheme of the invention, the alkyl alcohol amine is selected from one or a combination of a plurality of monoalkyl alcohol amine, dialkyl alcohol amine and trialkyl alcohol amine.

As a preferable technical scheme of the invention, the mass ratio of the dialkyl alcohol amine to the trialkyl alcohol amine is (2-3): 1.

as a preferable technical scheme of the invention, the inorganic base is selected from one or a combination of more of ammonia water, lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium carbonate, calcium bicarbonate, sodium carbonate, sodium bicarbonate, potassium carbonate and potassium bicarbonate.

As a preferred technical scheme of the invention, the inorganic acid is selected from one or a combination of more of hydrochloric acid, sulfuric acid, phosphoric acid and nitric acid.

As a preferable technical scheme of the invention, the ammonia water is 20 wt% ammonia water solution.

The second aspect of the present invention provides a method for preparing a curing agent, which at least comprises the following steps: adding the components into a reaction kettle, and uniformly stirring to obtain the product.

The third aspect of the invention provides a melamine resin composition, and the preparation raw materials comprise a melamine resin prepolymer and the curing agent.

As a preferable technical scheme of the invention, the mass ratio of the melamine resin prepolymer to the curing agent is 100: (0.1-2).

Has the advantages that: the invention provides a curing agent and a melamine resin composition containing the same, wherein the curing agent is added with alcohol amine substances comprising dialkyl alcohol amine and trialkyl alcohol amine, inorganic acid and inorganic alkali with specific content, so that the curing agent has reaction inertia on functional groups in melamine resin at normal temperature, can perform rapid curing and crosslinking reaction with a melamine resin system under heating condition, and has better latency, long service life and high curing activity.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

In order to solve the above technical problems, a first aspect of the present invention provides a curing agent, which is prepared from at least alcohol amine, inorganic base and inorganic acid; the mass ratio of the alcohol amine to the inorganic base to the inorganic acid is (5-9): 1: 8.

in a preferred embodiment, the preparation raw materials at least comprise alcohol amine, inorganic base and inorganic acid; the mass ratio of the alcohol amine to the inorganic base to the inorganic acid is 7: 1: 8.

<alcohol amines>

The alcohol amine is alkyl alcohol amine.

In a preferred embodiment, the alkyl alcohol amine is selected from one or more of monoalkyl alcohol amine, dialkyl alcohol amine and trialkyl alcohol amine.

As specific examples of the monoalkyl alcohol amine, there are included, but not limited to, monomethyl ethanolamine, monoethyl ethanolamine, monopropyl ethanolamine, monobutyl ethanolamine, monomethyl propanolamine, monoethyl propanolamine, monopropyl propanolamine, monobutyl propanolamine, monomethyl butanolamine, monoethyl butanolamine, monopropyl butanolamine, monobutyl butanolamine.

Specific examples of the dialkanolamine include, but are not limited to, dimethylethanolamine, diethanolamine, diethylethanolamine, dipropylethanolamine, dibutylethanolamine, dimethylpropanolamine, diethylpropanolamine, dipropylpropanolamine, dibutylpropanolamine, dimethylbutanolamine, diethylbutanolamine, dipropylbutanolamine, dibutylbutanolamine.

Specific examples of the trialkylalkanolamine include, but are not limited to, trimethylethanolamine, triethanolamine, triethylethanolamine, tripropylethanolamine, tributylethanolamine, trimethylpropanolamine, triethylpropanolamine, tripropylpropanolamine, tributylpropanolamine, trimethylbutanolamine, triethylbutanolamine, tripropylbutanolamine, tributylbutanolamine.

In a preferred embodiment, the alcohol amine includes a dialkanol amine and a trialkyl alcohol amine.

In a more preferred embodiment, the mass ratio of the dialkanolamine to the trialkylalkanolamine is (2 to 3): 1; more preferably, the mass ratio of the dialkanolamine to the trialkylalkanolamine is 2.5: 1.

in a more preferred embodiment, the dialkanolamine is diethanolamine; the trialkyl alcohol amine is triethanolamine.

The diethanolamine and triethanolamine are commercially available and include, but are not limited to, those available from Jinan Guangyu chemical Co.

<Inorganic base>

The inorganic base is selected from one or a combination of more of ammonia water, lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium carbonate, calcium bicarbonate, sodium carbonate, sodium bicarbonate, potassium carbonate and potassium bicarbonate.

In a preferred embodiment, the inorganic base is ammonia.

In a more preferred embodiment, the aqueous ammonia is a 20 wt% aqueous ammonia solution.

The ammonia may be obtained from commercial sources including, but not limited to, Nantong Guangrong chemical Co.

<Inorganic acid>

The inorganic acid is selected from one or a combination of more of hydrochloric acid, sulfuric acid, phosphoric acid and nitric acid.

In a preferred embodiment, the mineral acid is hydrochloric acid.

The applicant finds that by adding an alcohol amine substance comprising dialkanol amine and trialkyl alcohol amine and further limiting the mass ratio of the dialkanol amine to the trialkyl alcohol amine to (2-3): the melamine resin curing agent can interact with inorganic base and inorganic acid in a system, has reaction inertia to functional groups in melamine resin in a normal temperature normal state, can perform rapid curing crosslinking reaction with the melamine resin system when being heated to 140 ℃, and has good latency, long service life and high curing activity.

In addition, when the inorganic base and the inorganic acid in the system are added too much or too little, the curing effect of the curing agent is influenced, and when the mass ratio of the alcohol amine to the inorganic base to the inorganic acid is controlled to be (5-9): 1: at 8, the system can keep better curing activity and latency with the melamine resin.

A second aspect of the present invention provides a method for preparing the curing agent, characterized by comprising at least the steps of: adding the components into a reaction kettle, and uniformly stirring to obtain the product.

In a preferred embodiment, the preparation method of the curing agent at least comprises the following steps: adding dialkyl hydramine into a reaction kettle, stirring, then sequentially adding trialkyl hydramine, ammonia water and hydrochloric acid, stirring, starting cooling water, cooling to room temperature, and discharging to obtain the catalyst.

The third aspect of the invention provides a melamine resin composition, which comprises a melamine resin prepolymer and the curing agent.

In a preferred embodiment, the mass ratio of the melamine resin prepolymer to the curing agent is 100: (0.1-2); preferably, the mass ratio of the melamine resin prepolymer to the curing agent is 100: 1.

the melamine resin prepolymer may be obtained from commercial sources including, but not limited to, from Kelida chemical trade, Inc., of Tianjin.