阅读说明：本技术 一种蓖麻油改性纺织涂层用亮面树脂及其制备方法 (Castor oil modified bright resin for textile coating and preparation method thereof ) 是由 陈元昌 舒科进 于 2021-01-15 设计创作，主要内容包括：本发明提供了一种蓖麻油改性纺织涂层用亮面树脂及其制备方法,该亮面树脂按重包括如下组分构成：聚合二元醇、精练蓖麻油,乙二醇,异氰酸酯,AS树脂,二甲基甲酰胺等。本发明采用不同聚酯多元醇与精练蓖麻油的混合多元醇制作出一种固含量在60％左右、产品粘度在60000－90000CPS/25℃、100％模量在60±10的中硬质纺织涂层用高固亮面面胶树脂。将其涂布在纺织品表面时可具有好的成膜性和更好的亮度,既使涂层产品不会过于僵硬且表面干爽度好,不会因亮面制品而产品粘连异常。(The invention provides a bright resin for a castor oil modified textile coating and a preparation method thereof, wherein the bright resin comprises the following components in parts by weight: polymeric glycols, refined castor oil, ethylene glycol, isocyanates, AS resins, dimethylformamide and the like. The invention adopts mixed polyol of different polyester polyols and refined castor oil to prepare the high-solid bright-finish surface adhesive resin for the medium-hard textile coating, wherein the solid content of the high-solid bright-finish surface adhesive resin is about 60 percent, the product viscosity of the high-solid bright-finish surface adhesive resin is 60000-. When the coating is coated on the surface of a textile, the coating has good film forming property and better brightness, so that a coating product is not too rigid, the surface is good in dryness, and the product adhesion abnormality caused by bright products is avoided.)

1. The castor oil modified bright resin for the textile coating is characterized in that: the bright resin for the castor oil modified textile coating comprises the following components in percentage by weight:

polymeric glycol: 18-32%, refined castor oil: 6-18%, ethylene glycol: 1-5%, isocyanate: 13-23%, organic bismuth catalyst: 0.01-0.1%, methanol: 0.01-0.2%, malic acid: 0.05-0.5%, AS resin: 2-7%, dimethylformamide: 25-35%, butanone: 4-10%; BYK-9565: 0.01-0.5%, antioxidant: 0.01 to 0.1 percent.

2. The bright resin for the castor oil modified textile coating of claim 1, wherein: the refined castor oil is PP-grade castor oil of medium-grade grease, the color is less than or equal to 2, the acid value is less than or equal to 1maKOH/g, the water content is less than 0.2 percent, and the hydroxyl value is 150-165 mgKOH/g.

3. The bright resin for the castor oil modified textile coating of claim 1, wherein: the polymeric diol is polymerized by adipic acid-ethylene glycol and 1, 4-butanediol or polyol with small molecular weight and compatibility with castor oil.

4. The bright resin for the castor oil modified textile coating of claim 1, wherein: the solid content of the bright resin for the castor oil modified textile coating is 55-65%, the viscosity is 60000-90000 CPS/25 ℃, and the 100% modulus is 60 +/-10.

5. The bright resin for the castor oil modified textile coating of claim 1, wherein: the isocyanate is one or more of 4, 4-diphenylmethane diisocyanate, toluene diisocynate, isophorone diisocyanate and 4, 4' -dicyclohexylmethane diisocyanate.

6. The bright resin for the castor oil modified textile coating of claim 1, wherein: the antioxidant is any one of JPP-100 or 2, 6-di-tert-butyl-p-cresol.

7. The method for preparing the bright resin for the castor oil modified textile coating according to claim 1, wherein the method comprises the following steps: the preparation method comprises the following steps:

the first step is as follows: putting an antioxidant, polymeric diol, refined castor oil, ethylene glycol, butanone and 55-85% of dimethylformamide into a reaction kettle and stirring for 20 min;

the second step is that: adding 55-65% of isocyanate to start polymerization, heating to 75-85 ℃, and carrying out heat preservation reaction for 25-35 min;

the third step: adding 5-15% of dimethylformamide and 10-20% of isocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fourth step: adding 5-15% of dimethylformamide and 5-15% of isocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fifth step: adding an organic bismuth catalyst, and reacting for 25-35 min at the temperature of 75-85 ℃;

and a sixth step: adding 5-15% of dimethylformamide and methanol to stop the reaction after the isocyanate is corrected to react to the required viscosity;

eighth step: adding malic acid, AS resin and BYK-9565, stirring for 25-35 min, discharging and packaging.

Technical Field

The embodiment disclosed by the invention relates to the technical field of chemical engineering in general, and more specifically relates to a bright resin for a castor oil modified textile coating and a preparation method thereof.

Background

The textile coating finishing agent is also called coating glue, and is a macromolecular compound uniformly coated on the surface of a fabric. The original textile coating mainly solves the waterproof problem, but has the defect of moisture impermeability, and the coated textile has stuffy feeling and poor comfort when in use. Since the 70 s, researchers developed a series of coating adhesives for waterproof moisture-permeable fabrics by modifying the chemical structure of the coating adhesive and changing the coating processing method in order to improve the air permeability and moisture permeability of the coating adhesive.

In recent years, functional coating adhesives and composite coating adhesives have been developed greatly. The surface brightness of the coated textile is poor, so that the brightness problem needs to be solved by using the bright surface adhesive resin, but the existing bright surface adhesive resin for the textile coating is mostly the resin synthesized by the common polyester polyol, and the problems of insufficient brightness of the surface and insufficient transparency are presented when the resin is used.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a bright resin for a castor oil modified textile coating and a preparation method thereof, which can effectively solve the problems in the prior art.

The technical scheme of the invention is as follows:

the castor oil modified bright resin for the textile coating comprises the following components in percentage by weight:

polymeric glycol: 18-32%, refined castor oil: 6-18%, ethylene glycol: 1-5%, isocyanate: 13-23%, organic bismuth catalyst: 0.01-0.1%, methanol: 0.01-0.2%, malic acid: 0.05-0.5%, AS resin: 2-7%, dimethylformamide: 25-35%, butanone: 4-10%; BYK-9565: 0.01-0.5%, antioxidant: 0.01 to 0.1 percent.

Preferably, the refined castor oil is PP-grade castor oil of medium-grade grease, the color of the refined castor oil is less than or equal to 2, the acid value of the refined castor oil is less than or equal to 1maKOH/g, the water content of the refined castor oil is less than 0.2 percent, and the hydroxyl value of the refined castor oil is 150-165 mgKOH/g.

Preferably, the polymeric diol is a diol polymerized by two or more of adipic acid-ethylene glycol, 1, 4-butanediol or polyol with small molecular weight and compatibility with castor oil.

Preferably, the solid content of the bright resin for the castor oil modified textile coating is 55-65%, the viscosity is 60000-90000 CPS, and the 100% modulus is 60 +/-10.

Preferably, the isocyanate is one or more of 4, 4-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, 4' -dicyclohexylmethane diisocyanate.

Preferably, the antioxidant is any one of JPP-100 or 2, 6-di-tert-butyl-p-cresol.

Further, the present invention also provides: the preparation method of the bright resin for the castor oil modified textile coating comprises the following steps:

the first step is as follows: putting an oxidant, polymeric dihydric alcohol, refined castor oil, ethylene glycol, butanone and 55-85% of dimethylformamide into a reaction kettle and stirring for 20 min;

the second step is that: adding 55-65% of isocyanate to start polymerization, heating to 75-85 ℃, and carrying out heat preservation reaction for 25-35 min;

the third step: adding 5-15% of dimethylformamide and 10-20% of isocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fourth step: adding 5-15% of dimethylformamide and 5-15% of isocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fifth step: adding an organic bismuth catalyst, and reacting for 25-35 min at the temperature of 75-85 ℃;

and a sixth step: adding 5-15% of dimethylformamide and methanol to stop the reaction after the isocyanate is corrected to react to the required viscosity;

eighth step: adding malic acid, AS resin and BYK-9565, stirring for 25-35 min, discharging and packaging.

The invention has the advantages that:

(1) the invention adopts mixed polyol of different polyester polyols and refined castor oil to prepare the high-solid bright-finish surface adhesive resin for the medium-hard textile coating, wherein the solid content of the high-solid bright-finish surface adhesive resin is about 60 percent, the product viscosity of the high-solid bright-finish surface adhesive resin is 60000-. When the coating is coated on the surface of a textile, the coating has good film forming property and better brightness, so that a coating product is not too rigid, the surface is good in dryness, and the product adhesion abnormality caused by bright products is avoided.

(2) The invention utilizes the characteristic that castor oil polyhydric alcohol has higher optical rotation and combines with the polymeric dihydric alcohol, so that white light is not easy to generate on the surface of the product, the surface gloss is soft, and the castor oil polyhydric alcohol has the advantages of soft brightness, no white light feeling and strong transparency when being coated on the surface of a textile product. Due to the characteristics of castor oil, the hydroxyl number of the castor oil is more than 2, so that the product can form a certain network package cross-linked substance, and the substances are firmly combined and uniformly distributed, so that the product has better dry performance and permeability, and the castor oil polyol is degradable bio-based polyol and is more environment-friendly, so that the prepared bright resin has no toxicity and high safety.

(3) The invention relates to a macromolecular high-solid product synthesized by utilizing the form that polyester polyol and castor oil polyol are mutually blocked and react with isocyanate. In the reaction, the polyester polyol has higher crystallinity and poorer cold and bending resistance; and the castor oil polyalcohol has low crystallinity and excellent flexibility, so that the low-temperature flexibility of the product is improved, and the crystallinity of the product is reduced. Thereby improving the low-temperature flexibility of the product and ensuring that the textile coating product also has good flexibility and wearing comfort in cold seasons. The hydroxyl number of conventional polyester polyols is typically 2, while the hydroxyl number of castor oil polyols is greater than 2. Therefore, the product not only has a straight chain type chain extension reaction, but also has a side chain reaction, so that the product has a certain crosslinking density after the synthesis reaction, forms a reticular structure, greatly contributes to the adhesion of the product on a base material, and contributes to the improvement of the surface dry and comfortable performance and the anti-adhesion performance. More importantly, the asymmetric carbon atom of castor oil, the main fatty acid of castor oil, is after the 12-position, has extremely strong optical activity, and polyester polyol is very symmetric polymeric polyol. So that the optical rotation performance and the permeability of the product are improved. The glossiness of the product is softer, the white light sense is eliminated, and the transparency of the product is increased. In addition, due to the small molecular weight and low crystallinity of castor oil, the synthesized polymer has very good solubility in a solvent system, so that the whole reaction can achieve an important physical property of about 60 percent of solid content, and the high solid content of the polymer can improve the film-forming thickness of a fabric coating. Thereby greatly improving the brightness of the product.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Detailed Description

Example 1

The castor oil modified bright resin for the textile coating comprises the following components in percentage by weight:

adipic acid-ethylene glycol, 1, 4-butanediol polymeric glycol: 32%, refined castor oil: 6%, ethylene glycol: 1%, 4-diphenylmethane diisocyanate: 19.9%, organobismuth catalyst: 0.01%, methanol: 0.02%, malic acid: 0.05%, AS resin: 2%, dimethylformamide: 35%, butanone: 4 percent; BYK-9565: 0.01%, antioxidant: 0.01 percent, wherein the refined castor oil is PP grade castor oil of medium-grade grease, the color is less than or equal to 2, the acid value is less than or equal to 1maKOH/g, the water content is less than 0.2 percent, and the hydroxyl value is 150-165 mgKOH/g.

The preparation method of the bright resin for the castor oil modified textile coating comprises the following steps:

the first step is as follows: putting an oxidant, polymeric dihydric alcohol, refined castor oil, ethylene glycol, butanone and 55-85% of dimethylformamide into a reaction kettle and stirring for 20 min;

the second step is that: adding 55-65% of 4, 4-diphenylmethane diisocyanate to start polymerization, heating to 75-85 ℃, and carrying out heat preservation reaction for 25-35 min;

the third step: adding 5-15% of dimethylformamide and 10-20% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fourth step: adding 5-15% of dimethylformamide and 5-15% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fifth step: adding an organic bismuth catalyst, and reacting for 25-35 min at the temperature of 75-85 ℃;

and a sixth step: after correcting 4, 4-diphenylmethane diisocyanate to react to the required viscosity, adding 5-15% of dimethylformamide and methanol to stop the reaction;

eighth step: adding malic acid, AS resin and BYK-9565, stirring for 25-35 min, discharging and packaging.

Example 2

The castor oil modified bright resin for the textile coating comprises the following components in percentage by weight:

adipic acid-ethylene glycol, 1, 4-butanediol polymeric glycol: 18%, refined castor oil: 18%, ethylene glycol: 5%, 4-diphenylmethane diisocyanate: 15.7%, organobismuth catalyst: 0.1%, methanol: 0.1%, malic acid: 0.5%, AS resin: 7%, dimethylformamide: 25%, butanone: 10 percent; BYK-9565: 0.5%, antioxidant: 0.1 percent, wherein the refined castor oil is PP grade castor oil of medium-grade grease, the color is less than or equal to 2, the acid value is less than or equal to 1maKOH/g, the water content is less than 0.2 percent, and the hydroxyl value is 150-165 mgKOH/g.

The preparation method of the bright resin for the castor oil modified textile coating comprises the following steps:

the first step is as follows: putting an oxidant, polymeric dihydric alcohol, refined castor oil, ethylene glycol, butanone and 55-85% of dimethylformamide into a reaction kettle and stirring for 20 min;

the second step is that: adding 55-65% of 4, 4-diphenylmethane diisocyanate to start polymerization, heating to 75-85 ℃, and carrying out heat preservation reaction for 25-35 min;

the third step: adding 5-15% of dimethylformamide and 10-20% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fourth step: adding 5-15% of dimethylformamide and 5-15% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fifth step: adding an organic bismuth catalyst, and reacting for 25-35 min at the temperature of 75-85 ℃;

and a sixth step: after correcting 4, 4-diphenylmethane diisocyanate to react to the required viscosity, adding 5-15% of dimethylformamide and methanol to stop the reaction;

eighth step: adding malic acid, AS resin and BYK-9565, stirring for 25-35 min, discharging and packaging.

Example 3

The castor oil modified bright resin for the textile coating comprises the following components in percentage by weight:

adipic acid-ethylene glycol, 1, 4-butanediol polymeric glycol: 24%, refined castor oil: 12%, ethylene glycol: 2.4%, 4-diphenylmethane diisocyanate: 18.86%, organobismuth catalyst: 0.01%, methanol: 0.02%, malic acid: 0.2%, AS resin: 4.8%, dimethylformamide: 30.1%, butanone: 7.5 percent; BYK-9565: 0.1%, antioxidant: 0.01 percent, wherein the refined castor oil is PP grade castor oil of medium-grade grease, the color is less than or equal to 2, the acid value is less than or equal to 1maKOH/g, the water content is less than 0.2 percent, and the hydroxyl value is 150-165 mgKOH/g.

The preparation method of the bright resin for the castor oil modified textile coating comprises the following steps:

the first step is as follows: putting an oxidant, polymeric dihydric alcohol, refined castor oil, ethylene glycol, butanone and 55-85% of dimethylformamide into a reaction kettle and stirring for 20 min;

the second step is that: adding 55-65% of 4, 4-diphenylmethane diisocyanate to start polymerization, heating to 75-85 ℃, and carrying out heat preservation reaction for 25-35 min;

the third step: adding 5-15% of dimethylformamide and 10-20% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fourth step: adding 5-15% of dimethylformamide and 5-15% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fifth step: adding an organic bismuth catalyst, and reacting for 25-35 min at the temperature of 75-85 ℃;

and a sixth step: after correcting 4, 4-diphenylmethane diisocyanate to react to the required viscosity, adding 5-15% of dimethylformamide and methanol to stop the reaction;

eighth step: adding malic acid, AS resin and BYK-9565, stirring for 25-35 min, discharging and packaging.

Example 4

The castor oil modified bright resin for the textile coating comprises the following components in percentage by weight:

adipic acid-ethylene glycol, 1, 4-butanediol polymeric glycol: 28%, refined castor oil: 14%, ethylene glycol: 3.6%, 4-diphenylmethane diisocyanate: 17%, organobismuth catalyst: 0.02, methanol: 0.03, malic acid: 0.3%, AS resin: 5.3%, dimethylformamide: 31.53%, butanone: 5 percent; BYK-9565: 0.2%, antioxidant: 0.02, wherein the refined castor oil is PP-grade castor oil of medium-grade grease, the color is less than or equal to 2, the acid value is less than or equal to 1maKOH/g, the water content is less than 0.2 percent, and the hydroxyl value is 150-165 mgKOH/g.

The preparation method of the bright resin for the castor oil modified textile coating comprises the following steps:

the first step is as follows: putting an oxidant, polymeric dihydric alcohol, refined castor oil, ethylene glycol, butanone and 55-85% of dimethylformamide into a reaction kettle and stirring for 20 min;

the second step is that: adding 55-65% of 4, 4-diphenylmethane diisocyanate to start polymerization, heating to 75-85 ℃, and carrying out heat preservation reaction for 25-35 min;

the third step: adding 5-15% of dimethylformamide and 10-20% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fourth step: adding 5-15% of dimethylformamide and 5-15% of 4, 4-diphenylmethane diisocyanate, and reacting for 25-35 min at the temperature of 75-85 ℃;

the fifth step: adding an organic bismuth catalyst, and reacting for 25-35 min at the temperature of 75-85 ℃;

and a sixth step: after correcting 4, 4-diphenylmethane diisocyanate to react to the required viscosity, adding 5-15% of dimethylformamide and methanol to stop the reaction;

eighth step: adding malic acid, AS resin and BYK-9565, stirring for 25-35 min, discharging and packaging.

The prepared bright resin of examples 1-4 and the bright adhesive resin synthesized by the adopted common polyester polyol are coated on the textile, and the performance detection of brightness, transparency, low-temperature flexibility and surface dryness is carried out according to the national standard or the industrial standard, and the comparison conditions are shown in table 1:

table 1 comparative table of property detection (/%)

In conclusion, compared with the bright resin prepared from the common polyester polyol, the bright resin for the castor oil modified textile coating prepared by the preparation method and the formula has the advantages that the brightness, the transparency, the flexibility and the surface dryness are improved, the bright resin is not adhered, the environment is more friendly, and toxic substances are not caused. In particular, the effect of example 3 is more remarkable.

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present disclosure, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.