阅读说明：本技术 一种反应性高分子红色着色剂的加工工艺 (Processing technology of reactive high-molecular red colorant ) 是由 袁志军 李忠 宋学军 于 2019-09-02 设计创作，主要内容包括：本发明提供一种反应性高分子红色着色剂的加工工艺,属于人造革着色领域,该反应性高分子红色着色剂的加工工艺具体步骤为准备A基团和B基团、对A基团和B基团进行混合加热搅拌工序、混合加热搅拌后转入结晶釜工序、水洗结晶后的B基团处理工序、获取纯净的M基团、取出M基团并与各级反应剂进行反应和获取红色着色剂。本发明在设计高分子聚合树脂时通过化学反应的方式把发色基团和助色基团反应到树脂分子中去,使聚氨酯树脂成品带上特定红光颜色,避免颜色从物料表面或底层带出造成色迁移；红色着色剂(树脂)本身具有高透感,可增加展色的艳度,富有染料水特性的同时,避免了色迁移问题。(The invention provides a processing technology of a reactive high-molecular red coloring agent, belonging to the field of coloring of artificial leather. When the high-molecular polymer resin is designed, the chromophoric group and the color-assisting group are reacted into resin molecules in a chemical reaction mode, so that a polyurethane resin finished product is provided with a specific red light color, and color migration caused by the color from the surface or the bottom layer of a material is avoided; the red colorant (resin) has high transparency, can increase the brilliance of color development, is rich in dye water, and avoids the problem of color migration.)

1. A processing technology of a reactive polymer red colorant is characterized by comprising the following steps:

the method comprises the following steps: preparing a red chromophoric group A group capable of introducing a hydroxyl group and a group B which does not undergo self-polymerization reaction with the group A;

step two: mixing, heating and stirring the A group and the B group, mixing and stirring the mixed A group and the B group by a stirrer, heating by a heating kettle, and stirring, heating and mixing for a reasonable time;

step three: mixing, heating and stirring, transferring to a crystallization kettle process, adding the mixed A group, B group and water into a triangular flask, heating to boil until the A group and B group are dissolved (if the A group and B group are not dissolved, adding a small amount of hot water in a proper amount, stirring and heating to be close to boiling to dissolve the A group and B group), taking down the flask for cooling slightly, filtering with a hot water funnel and chrysanthemum filter paper while the flask is hot, collecting filtrate with a beaker, heating and insulating the hot water funnel and the solution with small fire in the filtering process so as not to cool, completely cooling the filtrate, leaching out crystals after the crystals are separated out, washing the surfaces of the crystals with a small amount of solvent (water), taking out the crystals after drying, putting the crystals on a watch glass, airing or drying, and weighing to obtain crystallized M group;

step four: b group treatment process after water washing crystallization;

step five: obtaining a pure M group;

step six: taking out the M group and reacting with each level of reactant;

step seven: the red colorant was obtained, weighed, canned, and stored at room temperature.

2. The process for preparing a reactive polymeric red colorant according to claim 1, wherein in step four, the step of treating the group B after the water washing crystallization further comprises the following steps:

the first step is as follows: placing the crystallized M group into a washing kettle for washing, and washing off redundant hydroxyl-containing group B by using water;

the second step is that: filtering the M groups after washing, filtering through a stainless steel vibrating screen for 30-35 min, and collecting impurities through a collecting box;

the third step: and (3) after treatment, drying, namely drying by using a drying fan, putting the washed and impurity-filtered M groups into a stainless steel mesh screen, starting the drying fan, and placing the drying fan at a position 20cm-25cm above the stainless steel mesh screen for drying for 25min-30 min.

3. The process for preparing a reactive polymeric red colorant according to claim 1, wherein in step six, said removing the M group and reacting with each level of reactant further comprises the following steps:

the first step is as follows: putting the M groups and all levels of reactants into a reaction kettle, controlling the temperature to be 82-85 ℃ and the time to be 4-4.5 h for reaction, and stirring by a stainless steel stirring rod for 10-15 min;

the second step is that: adding an expanding reagent into the M group after reaction to form a mixed solution for cooling, placing the mixed solution in a cooling kettle during cooling, winding a red copper serpentine coil internally filled with cooling liquid on the outer wall of the cooling kettle for cooling, and controlling the cooling temperature to be 40-45 ℃;

the third step: and cooling to obtain the M group which reacts with the polyurethane resin.

4. The process according to claim 1, wherein in step one, the group A is an o-benzoquinone group and the group B is a hydroxyl group.

5. The process for preparing a reactive polymeric red colorant according to claim 1, wherein in step two, 1 part or 2 parts of the group A and 16 parts or 18 parts of the group B are used.

6. The process according to claim 1, wherein the heating temperature is set to 90-100 ℃ in the second step.

7. The process for preparing a reactive polymeric red colorant according to claim 1, wherein in the second step, the heating time is set to 3h-3.5h, and the mixing and stirring time is set to 45min-50 min.

8. The process for preparing reactive polymeric red colorant according to claim 1, wherein in step two, the stirrer is a double-layer hinge stirrer, and the heating kettle is a resistance heating kettle or a PTC heating plate heating kettle.

9. The process for producing a reactive polymeric red colorant according to claim 1, wherein in step three, the M group is provided as a red polyol group.

10. The process for producing a reactive polymeric red colorant according to claim 3, wherein in step six, the reactants used in the first step are water solvent, polyol agent, chain extender and catalyst.

Technical Field

The invention belongs to the technical field of artificial leather coloring, and particularly relates to a processing technology of a reactive high-molecular red coloring agent.

Background

Artificial leather is a plastic product that looks and feels like leather and can replace it. Usually, the fabric is used as a substrate and coated with synthetic resin and various plastic additives. Mainly comprises three types of PVC artificial leather, PU artificial leather and PU synthetic leather.

Artificial leather is a plastic product that looks and feels like leather and can replace it. Usually, the fabric is used as a substrate and coated with synthetic resin and various plastic additives. Mainly comprises three types of PVC artificial leather, PU artificial leather and PU synthetic leather.

The artificial leather is colored in the manufacturing process, and the common coloring treatment adopts pigment slurry and dye water, and the dye water has high brilliance, high transparency and strong tinting strength, but has a fatal defect of color migration. The direct consequence of this is that the leather surfaces are contaminated by contact with one another and the transfer of the film is particularly unusable in the light-colored series of treatments.

Artificial leather produced using polyvinyl chloride (PVC) resin is conventionally called PVC artificial leather (artificial leather for short); artificial leather produced from Polyurethane (PU) resin and conventional fabrics is called PU artificial leather (PU leather for short); the artificial leather produced from the PU resin and the non-woven fabric is called PU synthetic leather (synthetic leather for short). This is a classification introduction for synthetic leather and artificial leather in some documents. The classification is mainly divided by the coating material and the base material: the artificial leather takes the polyurethane resin as a coating material and the non-woven fabric as the base fabric as the synthetic leather, and the polyvinyl chloride or the polyurethane resin as the coating material and the traditional fabric as the base fabric as the artificial leather.

Disclosure of Invention

In order to solve the technical problems, the invention provides a processing technology of a reactive polymer red colorant, which aims to solve the problems of easy color migration, transfer pollution of a film and mutual pollution of leather surfaces in the existing processing technology, and the processing technology of the reactive polymer red colorant specifically comprises the following steps:

the method comprises the following steps: preparing a red chromophoric group A group capable of introducing a hydroxyl group and a group B which does not undergo self-polymerization reaction with the group A;

step two: mixing, heating and stirring the A group and the B group, mixing and stirring the mixed A group and the B group by a stirrer, heating by a heating kettle, and stirring, heating and mixing for a reasonable time;

step three: mixing, heating and stirring, transferring to a crystallization kettle process, adding the mixed A group, B group and water into a triangular flask, heating to boil until the A group and B group are dissolved (if the A group and B group are not dissolved, adding a small amount of hot water in a proper amount, stirring and heating to be close to boiling to dissolve the A group and B group), taking down the flask for cooling slightly, filtering with a hot water funnel and chrysanthemum filter paper while the flask is hot, collecting filtrate with a beaker, heating and insulating the hot water funnel and the solution with small fire in the filtering process so as not to cool, completely cooling the filtrate, leaching out crystals after the crystals are separated out, washing the surfaces of the crystals with a small amount of solvent (water), taking out the crystals after drying, putting the crystals on a watch glass, airing or drying, and weighing to obtain crystallized M group;

step four: the B group treatment process after water washing crystallization comprises the following specific operations:

the first step is as follows: placing the crystallized M group into a washing kettle for washing, and washing off redundant hydroxyl-containing group B by using water;

the second step is that: filtering the M groups after washing, filtering through a stainless steel vibrating screen for 30-35 min, and collecting impurities through a collecting box;

the third step: drying after treatment, drying by a drying fan, putting the washed M groups into a stainless steel mesh screen, starting the drying fan, and drying at a position 20-25 cm above the stainless steel mesh screen for 25-30 min;

step five: obtaining a pure M group;

step six: taking out the M group and reacting with each level of reactant, and the specific operation also comprises the following steps:

the first step is as follows: putting the M groups and all levels of reactants into a reaction kettle, controlling the temperature to be 82-85 ℃ and the time to be 4-4.5 h for reaction, and stirring by a stainless steel stirring rod for 10-15 min;

the second step is that: adding an expanding reagent into the M group after reaction to form a mixed solution for cooling, placing the mixed solution in a cooling kettle during cooling, winding a red copper serpentine coil internally filled with cooling liquid on the outer wall of the cooling kettle for cooling, and controlling the cooling temperature to be 40-45 ℃;

the third step: cooling to obtain a synthetic reaction of the M group and polyurethane resin;

step seven: the red colorant was obtained, weighed, canned, and stored at room temperature.

Preferably, in the first step, the group A is an o-benzoquinone group, and the group B is a hydroxyl-containing group.

Preferably, in the second step, 1 part or 2 parts of A group and 16 parts or 18 parts of B group are taken as the A group.

Preferably, in the second step, the heating temperature is set to be 90-100 ℃.

Preferably, in the second step, the heating time is set to be 3h-3.5h, and the mixing and stirring time is set to be 45min-50 min.

Preferably, in the second step, the stirrer may adopt a double-layer hinge stirrer, and the heating kettle may adopt a resistance heating kettle or a PTC heating plate heating kettle.

Preferably, in step three, the M groups are provided as red polyol groups.

Preferably, in the sixth step, the reactants in the first step adopt water solvent, polyol agent, chain extender and catalyst.

Preferably, in the sixth step, the expanding reagent in the second step adopts a chain extender and an aqueous solvent.

Compared with the prior art, the invention has the following beneficial effects: the processing technology of the reactive high-molecular red colorant is widely applied to the technical field of artificial leather coloring. The invention introduces hydroxyl on a red chromophoric group through reaction to enable the red chromophoric group to become red polyol, and then embeds the red polyol group in the polyurethane resin reaction to prepare the polyurethane colorant showing red color, thereby solving the problems of easy color migration, transfer pollution of a film and mutual pollution of leather surfaces in the existing processing technology; the red colorant (resin) has high transparency, can increase the brilliance of color development, is rich in dye water, and avoids the problem of color migration.

Drawings

FIG. 1 is a process flow diagram of the reactive polymeric red colorant.

FIG. 2 is a flow chart of the treatment process of the B group after water washing crystallization.

FIG. 3 is a flow diagram of the reaction of the M group with reactants at each stage.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

in the figure:

as shown in figure 1

The processing technology of the reactive high-molecular red colorant specifically comprises the following steps:

s101: preparing a red chromophoric group A group capable of introducing a hydroxyl group and a group B which does not undergo self-polymerization reaction with the group A;

s102: mixing, heating and stirring the A group and the B group, mixing and stirring the mixed A group and the B group by a stirrer, heating by a heating kettle, and stirring, heating and mixing for a reasonable time;

s103: mixing, heating and stirring, transferring to a crystallization kettle process, adding the mixed A group, B group and water into a triangular flask, heating to boil until the A group and B group are dissolved (if the A group and B group are not dissolved, adding a small amount of hot water in a proper amount, stirring and heating to be close to boiling to dissolve the A group and B group), taking down the flask for cooling slightly, filtering with a hot water funnel and chrysanthemum filter paper while the flask is hot, collecting filtrate with a beaker, heating and insulating the hot water funnel and the solution with small fire in the filtering process so as not to cool, completely cooling the filtrate, leaching out crystals after the crystals are separated out, washing the surfaces of the crystals with a small amount of solvent (water), taking out the crystals after drying, putting the crystals on a watch glass, airing or drying, and weighing to obtain crystallized M group;

s104: the B group treatment process after water washing crystallization is shown in the attached figure 2, and the specific operation further comprises the following steps:

s401: placing the crystallized M group into a washing kettle for washing, and washing off redundant hydroxyl-containing group B by using water;

s402: filtering the M groups after washing, filtering through a stainless steel vibrating screen for 30-35 min, and collecting impurities through a collecting box;

s403: drying after treatment, drying by a drying fan, putting the washed M groups into a stainless steel mesh screen, starting the drying fan, and drying at a position 20-25 cm above the stainless steel mesh screen for 25-30 min;

s105: obtaining a pure M group;

s106: taking out the M group and reacting with each level of reactant, and combining the steps shown in the attached figure 3, the specific operation also comprises the following steps:

s601: putting the M groups and all levels of reactants into a reaction kettle, controlling the temperature to be 82-85 ℃ and the time to be 4-4.5 h for reaction, and stirring by a stainless steel stirring rod for 10-15 min;

s602: adding an expanding reagent into the M group after reaction to form a mixed solution for cooling, placing the mixed solution in a cooling kettle during cooling, winding a red copper serpentine coil internally filled with cooling liquid on the outer wall of the cooling kettle for cooling, and controlling the cooling temperature to be 40-45 ℃;

s603: cooling to obtain a synthetic reaction of the M group and polyurethane resin;

s107: the red colorant was obtained, weighed, canned, and stored at room temperature.

Preferably, in S101, the a group is an o-benzoquinone group, and the B group is a hydroxyl group.

Preferably, in S102, 1 part or 2 parts of the a group and 16 parts or 18 parts of the B group are used.

Preferably, in S102, the heating temperature is set to 90 ℃ to 100 ℃.

Preferably, in S102, the heating time is set to 3h to 3.5h, and the mixing and stirring time is set to 45min to 50 min.

Preferably, in S102, the stirrer may be a double-layer flap stirrer, and the heating kettle may be a resistance heating kettle or a PTC heating plate heating kettle.

Preferably, in S103, the M group is provided as a red polyol group.

Preferably, in S106, the reactant in S601 employs a water solvent, a polyol agent, a chain extender and a catalyst.

Preferably, in S106, the expanding agent in S602 employs a chain extender and an aqueous solvent.