CN111978897B - Defluorination pressure-sensitive hot melt adhesive for sanitary towel breathable film back adhesive and preparation method thereof - Google Patents

Defluorination pressure-sensitive hot melt adhesive for sanitary towel breathable film back adhesive and preparation method thereof Download PDF

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CN111978897B
CN111978897B CN202010923522.4A CN202010923522A CN111978897B CN 111978897 B CN111978897 B CN 111978897B CN 202010923522 A CN202010923522 A CN 202010923522A CN 111978897 B CN111978897 B CN 111978897B
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parts
petroleum resin
resin
thermoplastic elastomer
hot melt
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CN111978897A (en
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凌万青
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Shanghai Lujia Adhesive Co ltd
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Shanghai Lujia Adhesive Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J153/02—Vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/04—Thermoplastic elastomer

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention relates to the technical field of hot melt adhesives, in particular to a defluorescent pressure-sensitive hot melt adhesive for a sanitary towel breathable film back adhesive and a preparation method thereof, wherein the preparation raw materials at least comprise the following components in parts by weight: 20-40 parts of thermoplastic elastomer, 10-25 parts of mineral oil, 10-25 parts of first petroleum resin, 10-25 parts of second petroleum resin, 5-15 parts of tackifying resin, 0.1-0.6 part of antioxidant and 0.1-0.8 part of fluorescent light absorber.

Description

Defluorination pressure-sensitive hot melt adhesive for sanitary towel breathable film back adhesive and preparation method thereof
Technical Field
The invention relates to the technical field of hot melt adhesives, and particularly relates to a defluorination pressure-sensitive hot melt adhesive for a sanitary towel breathable film back adhesive and a preparation method thereof.
Background
Along with the concern of people on the health, the sanitary towel for women is required to have good air permeability, no harmful substances such as fluorescence and the like, low odor and no influence on the health, and the pressure-sensitive hot melt adhesive for the sanitary towel also needs to meet the requirement in the aspect.
Traditional sanitary towel gum, it is poor to ventilated membrane adhesive property, contain fluorescence, the smell is heavy, and this patent mainly solves the gum in the hot melt adhesive for sanitary towel, and it is good to adapt to ventilated membrane adhesive property, goes fluorescence, low smell.
Disclosure of Invention
In order to solve the technical problems, the invention provides a defluorescent pressure-sensitive hot melt adhesive for a breathable film back adhesive of a sanitary towel, which is prepared from the following raw materials in parts by weight: 20-40 parts of thermoplastic elastomer, 10-25 parts of mineral oil, 10-25 parts of first petroleum resin, 10-25 parts of second petroleum resin, 5-15 parts of tackifying resin, 0.1-0.6 part of antioxidant and 0.1-0.8 part of fluorescent light absorber.
As a preferred embodiment of the present invention, the thermoplastic elastomer is selected from one or more of SIS thermoplastic elastomer, SBS thermoplastic elastomer, SSBR thermoplastic elastomer, SEBS thermoplastic elastomer, TPU thermoplastic elastomer, and TPEE thermoplastic elastomer.
In a preferred embodiment of the present invention, the thermoplastic elastomer is an SIS thermoplastic elastomer.
In a preferred embodiment of the present invention, the SIS thermoplastic elastomer contains 10 to 25% by mass of styrene.
In a preferred embodiment of the present invention, the first petroleum resin is one or more selected from the group consisting of aliphatic resins, alicyclic resins, aromatic resins, aliphatic/aromatic copolymer resins, C5 hydrogenated petroleum resins, and C9 hydrogenated petroleum resins.
In a preferred embodiment of the present invention, the second petroleum resin is one or more selected from the group consisting of aliphatic resins, alicyclic resins, aromatic resins, C5 hydrogenated petroleum resins, and C9 hydrogenated petroleum resins.
In a preferred embodiment of the present invention, the tackifying resin is one or more selected from rosin resin, C5 hydrogenated petroleum resin, C5 petroleum resin, C9 petroleum resin, aromatic modified C5 petroleum resin, and aromatic modified terpene resin.
In a preferred embodiment of the present invention, the antioxidant is selected from one or more of 2, 6-bis (tertiary butyl) -4-methylphenol, bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide, tetrakis [ β - (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) propionate ] pentaerythritol ester, 2' -thiobis (4-methyl-6-tert-butylphenol), and tris (2, 4-di-tert-butylphenyl) phosphite.
As a preferred technical solution of the present invention, the antioxidant is a combination of 2, 6-bis (tertiary butyl) -4-methylphenol and bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of 2, 6-bis (tertiary butyl) -4-methylphenol to bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: (0.4-4.5).
The second aspect of the invention provides a preparation method of a defluorescent pressure-sensitive hot melt adhesive for a back adhesive of a breathable film of a sanitary towel, which comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 80-110 ℃; adding an antioxidant and the first petroleum resin, dissolving, adding a thermoplastic elastomer, uniformly stirring, adding the second petroleum resin, the tackifying resin and the fluorescent light absorber after the raw materials are completely dissolved, keeping the temperature of the materials at 130-160 ℃ until the materials are uniformly dissolved, keeping the temperature for 30-50min, and then cooling to 125-150 ℃, and discharging to obtain the composite material.
Has the advantages that: according to the invention, a new formula is adopted, and the thermoplastic elastomer, the first petroleum resin, the second petroleum resin and the like are compounded and cooperated with the tackifying resin and the like, so that the cohesive strength and the heat resistance of the pressure-sensitive hot melt adhesive can be effectively improved, and the problems of poor bonding strength and good bonding strength of the breathable film back adhesive in the hot melt adhesive for the sanitary towel are solved, so that the breathable film back adhesive not only has excellent bonding force with cloth, but also can be used for a long time without degumming phenomenon; in addition, the pressure-sensitive hot melt adhesive provided by the invention has good adhesion performance with the breathable film, is defluorinated, does not contain toxic and harmful substances such as benzene, toluene, xylene, formaldehyde and the like, has few volatile components and little smell, belongs to an environment-friendly product, and also has good stripping resistance and shearing force resistance.
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 term "prepared from …" as used herein is synonymous with "comprising". 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.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
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.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
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 technical problems, the invention provides a defluorescent pressure-sensitive hot melt adhesive for a breathable film back adhesive of a sanitary towel, which is prepared from the following raw materials in parts by weight: 20-40 parts of thermoplastic elastomer, 10-25 parts of mineral oil, 10-25 parts of first petroleum resin, 10-25 parts of second petroleum resin, 5-15 parts of tackifying resin, 0.1-0.6 part of antioxidant and 0.1-0.8 part of fluorescent light absorber.
In a preferred embodiment, the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following preparation raw materials in parts by weight: 20-40 parts of thermoplastic elastomer, 10-25 parts of mineral oil, 10-25 parts of first petroleum resin, 10-25 parts of second petroleum resin, 5-15 parts of tackifying resin, 0.1-0.6 part of antioxidant and 0.1-0.8 part of fluorescent light absorber.
In a more preferred embodiment, the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is prepared from the following raw materials in parts by weight: 25-35 parts of thermoplastic elastomer, 15-26 parts of mineral oil, 15-23 parts of first petroleum resin, 12-20 parts of second petroleum resin, 8-12 parts of tackifying resin, 0.2-0.5 part of antioxidant and 0.2-0.6 part of fluorescent light absorber.
In a most preferred embodiment, the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following preparation raw materials in parts by weight: 32 parts of thermoplastic elastomer, 23 parts of mineral oil, 18 parts of first petroleum resin, 15 parts of second petroleum resin, 10 parts of tackifying resin, 0.3 part of antioxidant and 0.4 part of fluorescent light absorber.
Thermoplastic elastomer
The thermoplastic elastomer is an elastomer which has the elasticity of rubber at normal temperature and can be plastically molded at high temperature. The rubber is a novel high polymer material between rubber and resin, can replace partial rubber, and can modify plastics. The dual performance and wide characteristic of the thermoplastic elastomer, which is possessed by rubber and plastics, make it widely used in the rubber industry for manufacturing daily products such as rubber shoes and adhesive tapes, and various industrial products such as rubber tubes, adhesive tapes, rubber plates, rubber parts, adhesives and the like. Meanwhile, the thermoplastic elastomer can replace rubber to be widely used for modifying general thermoplastic resins such as PVC, PE, PP, PS and the like and even engineering plastics such as PU, PA, CA and the like, so that the plastic industry also has a brand-new situation.
Generally, according to different preparation methods, thermoplastic elastomers are mainly classified into 2 types, i.e., chemical synthesis type thermoplastic elastomers and rubber-plastic blending type thermoplastic elastomers. The former is a polymer which is formed independently and is divided into main chain copolymerization, graft copolymerization and ionic polymerization. The latter are mainly blends of rubber and resin, among which also dynamic vulcanizates (TPE-TPV) and interpenetrating networks of polymers (TPE-IPN) which occur as cross-linked vulcanizates. TPEs are now rapidly developed around the world, centered on TPS and TPO, and their production and consumption amounts account for about 80% of all TPEs. Diene TPEs and vinyl chloride TPEs are also important varieties of common TPEs. Other materials such as TPU, TPEE, TPAE, TPF, etc. are mainly used for engineering.
In a preferred embodiment, the thermoplastic elastomer of the present invention is selected from one or more of SIS thermoplastic elastomer, SBS thermoplastic elastomer, SSBR thermoplastic elastomer, SEBS thermoplastic elastomer, TPU thermoplastic elastomer, TPEE thermoplastic elastomer.
In a more preferred embodiment, the thermoplastic elastomer of the present invention is an SIS thermoplastic elastomer.
In a preferred embodiment, the amount of styrene in the SIS thermoplastic elastomer of the present invention is from 10 to 25% by mass.
In a most preferred embodiment, the SIS thermoplastic elastomer of the present invention has a styrene content of 15% by mass.
The SIS thermoplastic elastomers described herein are commercially available from a variety of manufacturers including, but not limited to Ningbo Eurott polymers, Inc. under the trademark Eurott SIS 1202.
Mineral oil
The mineral oil is prepared from the mixture of refined liquid hydrocarbons obtained from petroleum, mainly the mixture of saturated cyclane and paraffin, and the crude oil through atmospheric and reduced pressure fractionation, solvent extraction and dewaxing, and hydrorefining.
The mineral oil is colorless semitransparent oily liquid, has no or almost no fluorescence, has no odor and no odor when cold, has slight petroleum odor when heated, is insoluble in water and ethanol, is soluble in volatile oil, is miscible in most nonvolatile oils, is stable to light, heat and acid, and can be slowly oxidized when contacting light and heat for a long time.
The mineral oil can be obtained from commercial products, and the manufacturers include, but are not limited to, chemical companies of Jinnan Runchang, and the types of the mineral oil are 5#, 7#, 10#, 15#, 26#, 32#, 46#, 68#, 100#, and 150 #.
In a most preferred embodiment, the mineral oil of the present invention is model number 15.
A first petroleum resin
Petroleum resin (hydrocarbon resin) is a thermoplastic resin produced by the processes of pretreatment, polymerization, distillation and the like of C5 and C9 fractions which are by-products produced by petroleum cracking, and is not a high polymer but an oligomer with the molecular weight of 300-3000.
The petroleum resin is named as a petroleum derivative, has the characteristics of low acid value, good miscibility, water resistance, ethanol resistance, chemical resistance and the like, has chemical stability to acid and alkali, and has the characteristics of good viscosity regulation and good thermal stability. Petroleum resins are generally not used alone but as accelerators, regulators, modifiers and other resins together.
In a preferred embodiment, the first petroleum resin of the present invention is selected from one or more of aliphatic resin, alicyclic resin, aromatic resin, aliphatic/aromatic copolymer resin, C5 hydrogenated petroleum resin, and C9 hydrogenated petroleum resin.
In a most preferred embodiment, the first petroleum resin of the present invention is a C5 hydrogenated petroleum resin.
A second petroleum resin
In a preferred embodiment, the second petroleum resin of the present invention is selected from one or more of aliphatic resin, alicyclic resin, aromatic resin, C5 hydrogenated petroleum resin, and C9 hydrogenated petroleum resin.
In a most preferred embodiment, the second petroleum resin of the present invention is a C9 hydrogenated petroleum resin.
Tackifying resins
The tackifying resin is used for being added into polyolefin materials, and wetting and bonding surfaces through surface diffusion or internal diffusion, so that the bonding force between materials is increased.
In a preferred embodiment, the tackifying resin of the present invention is selected from one or more of rosin resin, C5 hydrogenated petroleum resin, C5 petroleum resin, C9 petroleum resin, aromatic modified C5 petroleum resin, and aromatic modified terpene resin.
In a most preferred embodiment, the tackifying resin of the present invention is a rosin resin.
Antioxidant agent
The antioxidant of the present invention is a substance that prevents adverse effects of oxygen.
In a preferred embodiment, the antioxidant according to the invention is selected from one or more of 2, 6-bis (tertiary butyl) -4-methylphenol, bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide, pentaerythritol tetrakis [ beta- (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) propionate ], 2' -thiobis (4-methyl-6-tert-butylphenol), tris (2, 4-di-tert-butylphenyl) phosphite.
In a preferred embodiment, the antioxidant of the present invention is a combination of 2, 6-bis (tertiary butyl) -4-methylphenol and bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of 2, 6-bis (tertiary butyl) -4-methylphenol to bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: (0.4-4.5).
In a preferred embodiment, the antioxidant of the present invention is a combination of 2, 6-bis (tertiary butyl) -4-methylphenol and bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of 2, 6-bis (tertiary butyl) -4-methylphenol to bis (3, 5-bis (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: 2.
fluorescent light absorbers
In a preferred embodiment, the fluorescent light absorbers of the present invention are commercially available from manufacturers including, but not limited to, Bona New materials science and technology, Inc. of Dongguan under the designation Tisorb H300; tisorb H758; tisorb H8015.
In a most preferred embodiment, the fluorescent light absorber of the present invention is Tisorb H758.
The second aspect of the invention provides a preparation method of a pressure-sensitive hot melt adhesive for the back of a breathable film of a sanitary towel, which comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 80-110 ℃; adding an antioxidant and the first petroleum resin, dissolving, adding a thermoplastic elastomer, uniformly stirring, adding the second petroleum resin, the tackifying resin and the fluorescent light absorber after the raw materials are completely dissolved, keeping the temperature of the materials at 130-160 ℃ until the materials are uniformly dissolved, keeping the temperature for 30-50min, and then cooling to 125-150 ℃, and discharging to obtain the composite material.
It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the raw materials used are commercially available from national chemical reagents, unless otherwise specified.
Examples
In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention. In addition, the raw materials are commercially available and the extraction methods of the extract are all conventional extraction methods, if not otherwise specified.
Example 1
The defluorination pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is provided, and the preparation raw materials comprise the following components in parts by weight: 32 parts of thermoplastic elastomer, 23 parts of mineral oil, 18 parts of first petroleum resin, 15 parts of second petroleum resin, 10 parts of tackifying resin, 0.3 part of antioxidant and 0.4 part of fluorescent light absorber.
The thermoplastic elastomer is an SIS thermoplastic elastomer, and the mass content of styrene in the SIS thermoplastic elastomer is 15%.
Commercially available from Ningbo Eurite polymers Inc. under the Eurite SIS1202 designation.
The mineral oil has a model number of 15 #.
The first petroleum resin is C5 hydrogenated petroleum resin.
The second petroleum resin is C9 hydrogenated petroleum resin.
The tackifying resin is rosin resin.
The antioxidant is a combination of 2, 6-di (tertiary butyl) -4-methylphenol and bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of the 2, 6-di (tertiary butyl) -4-methylphenol to the bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: 2.
the fluorescent light absorbent is Tisorb H758, and the manufacturer is Bona new material science and technology company Limited in Dongguan.
The preparation method of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 90 ℃; adding antioxidant and first petroleum resin, dissolving, adding thermoplastic elastomer, stirring, adding second petroleum resin, tackifying resin and fluorescent absorbent after the raw materials are completely dissolved, keeping the temperature of the materials at 150 ℃ until the materials are uniformly dissolved, keeping for 30-50min, cooling to 130 ℃, and discharging to obtain the composite material.
Example 2
The defluorination pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is provided, and the preparation raw materials comprise the following components in parts by weight: 25 parts of thermoplastic elastomer, 15 parts of mineral oil, 15 parts of first petroleum resin, 12 parts of second petroleum resin, 8 parts of tackifying resin, 0.2 part of antioxidant and 0.2 part of fluorescent light absorber.
The thermoplastic elastomer is an SIS thermoplastic elastomer, and the mass content of styrene in the SIS thermoplastic elastomer is 15%.
Commercially available from Ningbo Eurite polymers Inc. under the Eurite SIS1202 designation.
The mineral oil has a model number of 15 #.
The first petroleum resin is C5 hydrogenated petroleum resin.
The second petroleum resin is C9 hydrogenated petroleum resin.
The tackifying resin is rosin resin.
The antioxidant is a combination of 2, 6-di (tertiary butyl) -4-methylphenol and bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of the 2, 6-di (tertiary butyl) -4-methylphenol to the bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: 2.
the fluorescent light absorbent is Tisorb H758, and the manufacturer is Bona new material science and technology company Limited in Dongguan.
The preparation method of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 90 ℃; adding antioxidant and first petroleum resin, dissolving, adding thermoplastic elastomer, stirring, adding second petroleum resin, tackifying resin and fluorescent absorbent after the raw materials are completely dissolved, keeping the temperature of the materials at 150 ℃ until the materials are uniformly dissolved, keeping for 30-50min, cooling to 130 ℃, and discharging to obtain the composite material.
Example 3
The defluorination pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is provided, and the preparation raw materials comprise the following components in parts by weight: 35 parts of thermoplastic elastomer, 26 parts of mineral oil, 23 parts of first petroleum resin, 20 parts of second petroleum resin, 12 parts of tackifying resin, 0.5 part of antioxidant and 0.6 part of fluorescent light absorber.
The thermoplastic elastomer is an SIS thermoplastic elastomer, and the mass content of styrene in the SIS thermoplastic elastomer is 15%.
Commercially available from Ningbo Eurite polymers Inc. under the Eurite SIS1202 designation.
The mineral oil has a model number of 15 #.
The first petroleum resin is C5 hydrogenated petroleum resin.
The second petroleum resin is C9 hydrogenated petroleum resin.
The tackifying resin is rosin resin.
The antioxidant is a combination of 2, 6-di (tertiary butyl) -4-methylphenol and bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of the 2, 6-di (tertiary butyl) -4-methylphenol to the bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: 2.
the fluorescent light absorbent is Tisorb H758, and the manufacturer is Bona new material science and technology company Limited in Dongguan.
The preparation method of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 90 ℃; adding antioxidant and first petroleum resin, dissolving, adding thermoplastic elastomer, stirring, adding second petroleum resin, tackifying resin and fluorescent absorbent after the raw materials are completely dissolved, keeping the temperature of the materials at 150 ℃ until the materials are uniformly dissolved, keeping for 30-50min, cooling to 130 ℃, and discharging to obtain the composite material.
Example 4
The defluorination pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is provided, and the preparation raw materials comprise the following components in parts by weight: 32 parts of thermoplastic elastomer, 23 parts of mineral oil, 18 parts of first petroleum resin, 15 parts of second petroleum resin, 10 parts of tackifying resin, 0.3 part of antioxidant and 0.4 part of fluorescent light absorber.
The thermoplastic elastomer is an SIS thermoplastic elastomer, commercially available as kraton D1124K.
The mineral oil has a model number of 15 #.
The first petroleum resin is C5 hydrogenated petroleum resin.
The second petroleum resin is C9 hydrogenated petroleum resin.
The tackifying resin is rosin resin.
The antioxidant is a combination of 2, 6-di (tertiary butyl) -4-methylphenol and bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of the 2, 6-di (tertiary butyl) -4-methylphenol to the bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: 2.
the fluorescent light absorbent is Tisorb H758, and the manufacturer is Bona new material science and technology company Limited in Dongguan.
The preparation method of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 90 ℃; adding antioxidant and first petroleum resin, dissolving, adding thermoplastic elastomer, stirring, adding second petroleum resin, tackifying resin and fluorescent absorbent after the raw materials are completely dissolved, keeping the temperature of the materials at 150 ℃ until the materials are uniformly dissolved, keeping for 30-50min, cooling to 130 ℃, and discharging to obtain the composite material.
Example 5
The defluorination pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is provided, and the preparation raw materials comprise the following components in parts by weight: 32 parts of thermoplastic elastomer, 23 parts of mineral oil, 18 parts of first petroleum resin, 15 parts of second petroleum resin, 10 parts of tackifying resin, 0.3 part of antioxidant and 0.4 part of fluorescent light absorber.
The thermoplastic elastomer is an SIS thermoplastic elastomer, and the mass content of styrene in the SIS thermoplastic elastomer is 15%.
Commercially available from Ningbo Eurite polymers Inc. under the Eurite SIS1202 designation.
The mineral oil has a model number of 15 #.
The first petroleum resin is C5 hydrogenated petroleum resin.
The second petroleum resin is C9 hydrogenated petroleum resin.
The tackifying resin is rosin resin.
The antioxidant is 2, 6-di (tertiary butyl) -4-methylphenol.
The fluorescent light absorbent is Tisorb H758, and the manufacturer is Bona new material science and technology company Limited in Dongguan.
The preparation method of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel comprises the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 90 ℃; adding antioxidant and first petroleum resin, dissolving, adding thermoplastic elastomer, stirring, adding second petroleum resin, tackifying resin and fluorescent absorbent after the raw materials are completely dissolved, keeping the temperature of the materials at 150 ℃ until the materials are uniformly dissolved, keeping for 30-50min, cooling to 130 ℃, and discharging to obtain the composite material.
Evaluation of Performance
1. Testing the transferability of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel prepared in the example 1-5 according to the HG/T3948-2007 method; the transfer grades are 0, 1, 2 and 3 respectively;
wherein the cotton cloth has obvious sizing material, and the transferability is recorded as 3; lifting the peeled cotton cloth by a paper towel, and recording the transferability to be 0 if the cotton cloth is still; if the cotton cloth can not be lifted but weak adhesion can be felt, the record is 1; if the cotton cloth can be lifted, it is recorded as 2.
2. And (3) evaluating the de-fluorescence property: the fluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel prepared in the embodiment 1-3 is irradiated by a fluorescent lamp, and the blue fluorescent display cannot be seen, so that the fluorescent effect is good;
the test results are shown in table 1 below.
TABLE 1 test results
Figure BDA0002667528600000111
Figure BDA0002667528600000121
It can be seen by comparing the experimental data of examples 1-5 that example 1 is the best technical solution, and the hot melt adhesive prepared by using 15% by mass of styrene in combination of SIS thermoplastic elastomer, mineral oil, C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, rosin resin, special fluorescent light absorber, antioxidant and other auxiliaries has low odor, low transfer property and excellent fluorescence removing effect.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims (2)

1. The defluorination pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel is characterized in that the preparation raw materials at least comprise the following components in parts by weight: 20-40 parts of thermoplastic elastomer, 10-25 parts of mineral oil, 10-25 parts of first petroleum resin, 10-25 parts of second petroleum resin, 5-15 parts of tackifying resin, 0.1-0.6 part of antioxidant and 0.1-0.8 part of fluorescent light absorber; the thermoplastic elastomer is an SIS thermoplastic elastomer; the mass content of styrene in the SIS thermoplastic elastomer is 10-25%; the first petroleum resin is C5 hydrogenated petroleum resin; the second petroleum resin is C9 hydrogenated petroleum resin; the tackifying resin is rosin resin; the antioxidant is a combination of 2, 6-di (tertiary butyl) -4-methylphenol and bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide, wherein the mass ratio of the 2, 6-di (tertiary butyl) -4-methylphenol to the bis (3, 5-di (tertiary butyl) -4-hydroxyphenyl) sulfide is 1: (0.4-4.5); the fluorescent light absorber is Tisorb H758.
2. The preparation method of the defluorescent pressure-sensitive hot melt adhesive for the back adhesive of the breathable film of the sanitary towel according to claim 1, which is characterized by comprising the following steps:
adding mineral oil into a reaction kettle, heating, and starting a reaction kettle turntable when the temperature is 80-110 ℃; adding an antioxidant and the first petroleum resin, dissolving, adding a thermoplastic elastomer, uniformly stirring, adding the second petroleum resin, the tackifying resin and the fluorescent light absorber after the raw materials are completely dissolved, keeping the temperature of the materials at 130-160 ℃ until the materials are uniformly dissolved, keeping the temperature for 30-50min, and then cooling to 125-150 ℃, and discharging to obtain the composite material.
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