Process formula of solid organic tin composite heat stabilizer

Abstract

The invention belongs to the technical field of organic tin heat stabilizers, and discloses a solid organic tin composite heat stabilizer process formula which comprises the following components in percentage by weight: 40% of di-n-octyltin maleate, 40% of di-n-octyltin dilaurate, 3% of dipentaerythritol, 5% of tris (2, 4-di-tert-butyl) phenyl phosphite, 5% of beta-(3, 4-di-tert-butyl) phenyl phosphite, 5% of 2, 4-di-tert-butyl-phenyl)-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- The invention relates to a solid organic tin composite heat stabilizer, which comprises the following components in percentage by weight: 5% of 2, 5-di-tert-butyl-4-hydroxyphenyl) octadecanol propionate, 2% of 6-amino-1, 3-dimethyluracil, 2% of dibenzoylmethane, 1.5% of 1, 3-diphenylpropanedione and 1.5% of stearoylbenzoylmethane. The heat stability, the light stability, the oxidation resistance and the processability of the PVC product can be effectively improved, the service life of the PVC product is prolonged, the industrial application value and the economic benefit are remarkable, and actual application and operation are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of organotin heat stabilizers, in particular to a process formula of a solid organotin composite heat stabilizer. Background Art

[0002] The introduction of alkyl chains in the structure of existing organotin heat stabilizers gives PVC resin favorable processing rheological properties, so it is widely used in the processing of sheets, plates, pipes and hollow injection molded products. However, most of the patents published in China on organotin heat stabilizers are about the synthesis route and reaction process of organotin compounds, and the high-purity organotin compounds are prepared, which have the disadvantages of imperfect lubrication system, high cost, insufficient market competitiveness, and certain pollution to the environment. Summary of the invention

[0003] One of the purposes of the present invention is to provide a process formula for a solid organic tin composite heat stabilizer.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a solid organic tin composite heat stabilizer process formula, including the following components in weight percentage:

[0005] Di-n-octyltin maleate 40%, di-n-octyltin dilaurate 40%, dipentaerythritol 3%, tri(2,4-di-tert-butyl)phenyl phosphite 5%, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester 5%, 6-amino-1,3-dimethyluracil 2%, dibenzoylmethane 2%, 1,3-diphenylpropanedione 1.5%, stearoylbenzoylmethane 1.5%.

[0006] Preferably, the di-n-octyltin maleate, di-n-octyltin dilaurate, dipentaerythritol, tris(2,4-di-tert-butyl)phenyl phosphite, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester, 6-amino-1,3-dimethyluracil, dibenzoylmethane, 1,3-diphenylpropanedione, and stearoylbenzoylmethane are all raw materials with purity grades that meet the corresponding national standards or industry standards.

[0007] Preferably, the weight percentages of the components are as follows:

[0008] Di-n-octyltin maleate, di-n-octyltin dilaurate, dipentaerythritol, tri(2,4-di-tert-butyl)phenyl phosphite, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester, 6-amino-1,3-dimethyluracil, dibenzoylmethane, 1,3-diphenylpropanedione and stearylbenzoylmethane are placed in a mixing device, heated and stirred at 85-105 degrees Celsius for 75 minutes to obtain a solid organic tin composite heat stabilizer.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] (1) The present invention uses a solid-state organic tin composite heat stabilizer process formula to achieve synergistic effects between its components, as well as reasonable raw material selection and preparation process, which can effectively improve the thermal stability, light stability, oxidation resistance and processing performance of PVC products, extend their service life, and have significant industrial application value and economic benefits. Through the optimized mixing process, the components of the obtained solid-state organic tin composite heat stabilizer are evenly distributed and have stable performance. When applied to PVC processing, it can be quickly and evenly dispersed in the PVC matrix, give full play to its thermal stabilization effect, and improve the quality stability and consistency of PVC products. Good mixing effect can also reduce performance defects caused by uneven local stabilizer concentration, such as poor local thermal stability and uneven color, thereby improving the overall performance and appearance quality of PVC products and meeting the market demand for high-quality PVC products. DETAILED DESCRIPTION

[0011] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0012] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0013] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0014] One of the preferred embodiments of the present invention is a solid organic tin composite heat stabilizer process formula, comprising the following components in weight percentage:

[0015] Di-n-octyltin maleate 40%, di-n-octyltin dilaurate 40%, dipentaerythritol 3%, tri(2,4-di-tert-butyl)phenyl phosphite 5%, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester 5%, 6-amino-1,3-dimethyluracil 2%, dibenzoylmethane 2%, 1,3-diphenylpropanedione 1.5%, stearoylbenzoylmethane 1.5%.

[0016] The di-n-octyltin maleate, di-n-octyltin dilaurate, dipentaerythritol, tri(2,4-di-tert-butyl)phenyl phosphite, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester, 6-amino-1,3-dimethyluracil, dibenzoylmethane, 1,3-diphenylpropanedione, and stearylbenzoylmethane are all raw materials with purity grades that meet the corresponding national standards or industry standards.

[0017] Weigh each component in the following weight percentages:

[0018] Di-n-octyltin maleate, di-n-octyltin dilaurate, dipentaerythritol, tri(2,4-di-tert-butyl)phenyl phosphite, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester, 6-amino-1,3-dimethyluracil, dibenzoylmethane, 1,3-diphenylpropanedione and stearylbenzoylmethane are placed in a mixing device, heated and stirred at 85-105 degrees Celsius for 75 minutes to obtain a solid organic tin composite heat stabilizer.

[0019] Working principle:

[0020] When used, the hydrogen atoms on the phenolic hydroxyl groups of hindered phenol antioxidants can react with free radicals to generate relatively stable phenoloxy free radicals, thereby terminating the free radical chain reaction and inhibiting the oxidative degradation process of PVC. At the same time, its long carbon chain structure helps to improve its compatibility with PVC, allowing it to be better dispersed in the PVC system and play a role. Amino-1,3-dimethyluracil reacts with hydrogen chloride produced by PVC degradation to form stable compounds, thereby reducing further damage to the PVC molecular chain by hydrogen chloride. At the same time, the amino and carbonyl functional groups in its molecular structure may interact with the PVC molecular chain to enhance the interaction between the molecular chains and improve the stability of the material. Tris(2,4-di-tert-butyl)phenyl phosphite can capture the free radicals generated by PVC during processing and use, prevent the chain oxidation reaction caused by free radicals, and thus inhibit the thermal oxidation degradation process of PVC. The phosphorus atom in its molecule is reducing and can react with peroxide to reduce it to a stable compound, interrupting the oxidation chain reaction. Dipentaerythritol contains multiple hydroxyl groups, which can undergo an esterification reaction with the hydrogen chloride produced by the degradation of PVC and absorb it, thereby reducing the catalytic effect of hydrogen chloride on the further degradation of PVC. At the same time, it can also participate in the thermal stability system of PVC to form a cross-linked structure and enhance the stability of the material. The tin atom in the organic tin compound has an empty valence electron orbital and can form a coordination bond with the unstable chlorine atom on the polyvinyl chloride (PVC) molecular chain, thereby inhibiting the dehydrochlorination reaction caused by heat, light and other factors during the processing and use of PVC, and playing a role in stabilizing the molecular chain.

[0021] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A solid organic tin composite heat stabilizer process formula, characterized in that: The composition includes the following weight percentages: Di-n-octyltin maleate 40%, di-n-octyltin dilaurate 40%, dipentaerythritol 3%, tri(2,4-di-tert-butyl)phenyl phosphite 5%, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester 5%, 6-amino-1,3-dimethyluracil 2%, dibenzoylmethane 2%, 1,3-diphenylpropanedione 1.5%, stearoylbenzoylmethane 1.5%.

2. A solid organic tin composite heat stabilizer process formula as claimed in claim 1, characterized in that: The di-n-octyltin maleate, di-n-octyltin dilaurate, dipentaerythritol, tri(2,4-di-tert-butyl)phenyl phosphite, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester, 6-amino-1,3-dimethyluracil, dibenzoylmethane, 1,3-diphenylpropanedione, and stearylbenzoylmethane are all raw materials with purity grades that meet the corresponding national standards or industry standards.

3. A solid organic tin composite heat stabilizer process formula as claimed in claim 1, characterized in that: Weigh each component in the following weight percentages: Di-n-octyltin maleate, di-n-octyltin dilaurate, dipentaerythritol, tri(2,4-di-tert-butyl)phenyl phosphite, β-(3,5-di-tert-4-hydroxyphenyl)propionic acid n-octadecyl ester, 6-amino-1,3-dimethyluracil, dibenzoylmethane, 1,3-diphenylpropanedione and stearylbenzoylmethane are placed in a mixing device, heated and stirred at 85-105 degrees Celsius for 75 minutes to obtain a solid organic tin composite heat stabilizer.