CN116083011A - Low-odor hot-melt pressure-sensitive adhesive for automobile foam compounding and preparation method thereof - Google Patents

Low-odor hot-melt pressure-sensitive adhesive for automobile foam compounding and preparation method thereof Download PDF

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Publication number
CN116083011A
CN116083011A CN202211691065.6A CN202211691065A CN116083011A CN 116083011 A CN116083011 A CN 116083011A CN 202211691065 A CN202211691065 A CN 202211691065A CN 116083011 A CN116083011 A CN 116083011A
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sensitive adhesive
melt pressure
stabilizer
hot
thermoplastic elastomer
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Inventor
邓朝怀
明丹
顾仲夏
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Shanghai Yongguan Zhongcheng New Material Technology Group Co ltd
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Shanghai Yongguan Zhongcheng New Material Technology Group 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
    • C09J11/08—Macromolecular additives
    • 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

Abstract

The invention relates to a low-odor hot-melt pressure-sensitive adhesive for compounding automobile foam and a preparation method thereof, wherein the hot-melt pressure-sensitive adhesive comprises a thermoplastic elastomer, tackifying resin, a plasticizer, an antioxidant, a stabilizer and a defoaming agent; the thermoplastic elastomer consists of a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and the defoaming agent is organic silicone. The beneficial effects are that: after the defoaming agent is added to the hot-melt pressure-sensitive adhesive, the weather resistance and the holding power are obviously increased, and can be increased by more than 20%.

Description

Low-odor hot-melt pressure-sensitive adhesive for automobile foam compounding and preparation method thereof
Technical Field
The invention relates to the field of composite glue, in particular to a low-odor hot-melt pressure-sensitive adhesive for automobile foam composition and a preparation method thereof.
Background
A hot-melt pressure-sensitive adhesive is a new adhesive tape which is mainly prepared by mixing synthetic rubber, resin, rubber oil and the like, heating to be in a molten state, and then coating on base materials such as cotton paper, cloth or plastic film. The main components of the hot-melt pressure-sensitive adhesive comprise six parts of base materials, plasticizers, tackifiers, fillers, antioxidants and thermoplastic elastomers, and the existing hot-melt pressure-sensitive adhesive has large smell and over-standard voc and is not environment-friendly. Therefore, various manufacturers are continuously developing them.
Chinese patent publication No. CN115216259A discloses a hot-melt pressure-sensitive adhesive (IPC class No. C09/J13308), in particular to a hot-melt pressure-sensitive adhesive for medical application and a preparation method and application thereof. The raw materials at least comprise the following components in parts by weight: 4-10 parts of SIS, 15-30 parts of modified styrene block copolymer, 1-5 parts of tackifying resin, 5-8 parts of polyisobutylene, 5-15 parts of plasticizer, 6-10 parts of modified hydrogenated ester gum, 3-5 parts of antioxidant and 1-3 parts of zinc oxide. The product prepared by the invention has the advantages of no sensitization, no residue, no holding power and the like, and simultaneously further reduces the low peeling force, does not cause large pulling force to skin during the tearing, and is beneficial to keeping the comfort of use.
Chinese patent publication No. CN115305037a discloses a hot-melt pressure-sensitive adhesive, which comprises the following components: styrene-isoprene-styrene block copolymers; butyl rubber/graphene composite rubber; a plasticizer; a tackifying resin; an anti-aging agent; a silane coupling agent; a cross-linking agent; and (3) a crosslinking-promoting auxiliary agent. The prepared hot-melt pressure-sensitive adhesive has super-strong water resistance.
Chinese patent publication No. CN114933888A discloses a hot-melt pressure-sensitive adhesive capable of being coated at high speed and a preparation method thereof, and the hot-melt pressure-sensitive adhesive capable of being coated at high speed comprises the following raw materials, by weight, 15-60 parts of thermoplastic elastomer, 30-70 parts of tackifying resin, 10-30 parts of plasticizer and 0.3-1.2 parts of antioxidant. The hot-melt pressure-sensitive adhesive has simple preparation process and good fluidity.
Chinese patent publication No. CN114181649a discloses a hot-melt pressure-sensitive adhesive for cotton coating, which is prepared by mixing thermoplastic elastomer, tackifying resin, plasticizer, antioxidant and stabilizer; the thermoplastic elastomer is composed of a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and the mass mixing ratio of the styrene-isoprene-styrene block copolymer and the styrene-butadiene-styrene block copolymer is 1: (0.1-0.2). The hot-melt pressure-sensitive adhesive for cotton coating can keep good and stable high-low temperature aging resistance and ultraviolet aging resistance, has excellent overall weather resistance, and further is difficult to displace and warp at the bonding position of the packaging film.
But aiming at the scene of using the foam in the automobile, the bonding force and the wettability of the foam in the automobile are required to be good, the temperature resistance is required to be higher, the holding power is required to be higher, the foam cannot fall off at the temperature higher than 50 ℃, and meanwhile, the foam has low VOCs (volatile organic compounds) and low odor. However, the hot-melt pressure-sensitive adhesives disclosed in the above patents cannot be used in the automotive foam.
Accordingly, there is a need to provide a low odor hot melt pressure sensitive adhesive for automotive foam compounding and a method of making the same to overcome the above-mentioned problems.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a low-odor hot-melt pressure-sensitive adhesive for compounding automobile foam and a preparation method thereof, and the weather resistance of the product is improved.
In order to achieve the above purpose, the present invention provides the following technical solutions: a low-odor hot-melt pressure-sensitive adhesive for automobile foam compounding comprises a thermoplastic elastomer, tackifying resin, a plasticizer, an antioxidant, a stabilizer and a defoaming agent; the thermoplastic elastomer consists of a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and the defoaming agent is organic silicone.
The organosilicone is manufactured by You Ni wil company.
The thermoplastic elastomer, tackifying resin, plasticizer, antioxidant and stabilizer are calculated according to parts by weight: 20-40 parts of thermoplastic elastomer, 30-50 parts of tackifying resin, 10-20 parts of plasticizer, 0.5-1 part of defoamer, 0.2-1 part of antioxidant and 0.2-1 part of stabilizer.
The tackifying resin is prepared from the following raw materials in percentage by weight: 30-45wt% of DCPD resin; 25-35wt% of hydrogenated carbon five petroleum resin; the method comprises the steps of carrying out a first treatment on the surface of the 20-30wt% of monomer petroleum resin; the polyisobutene accounts for 5-15wt%.
The tackifying resin is prepared from the following raw materials in percentage by weight: 35wt% of DCPD resin; 30wt% of hydrogenated carbon five petroleum resin; 25wt% of monomer petroleum resin; the polyisobutene was 10% by weight.
The stabilizer is any one or two of an ultraviolet absorber and a light stabilizer; the ultraviolet absorbent is 2- (2-hydroxy-3-tertiary butyl-5-methylphenyl) -5-chlorobenzoazole; the light stabilizer is bis (2, 6-tetramethyl-4-piperidinyl) sebacate
In order to achieve the above purpose, the present invention further provides the following technical solutions: a preparation method of a low-odor hot-melt pressure-sensitive adhesive for compounding automobile foam comprises the following steps:
(1) Preparing raw materials comprising thermoplastic elastomer, tackifying resin, plasticizer, antioxidant, stabilizer and defoamer according to the proportion;
(2) Setting the temperature in the vacuum stirring kettle to a preset temperature, sequentially adding a plasticizer, a stabilizer and an antioxidant into the reaction kettle, and adding the thermoplastic elastomer into the reaction kettle for stirring;
(3) Adding tackifying resin, introducing nitrogen for protection and continuing stirring;
(4) Adding a defoaming agent, closing nitrogen, and continuously stirring;
(5) And (5) vacuumizing, discharging by hydraulic pressure, and cooling to obtain a finished product.
Compared with the prior art, the invention has the beneficial effects that: after the defoaming agent is added to the hot-melt pressure-sensitive adhesive, the weather resistance and the holding power are obviously increased, and can be increased by more than 20%.
Detailed Description
The technical solutions of the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention relates to a low-odor hot-melt pressure-sensitive adhesive for compounding automobile foam, which is prepared by heating and shearing a thermoplastic elastomer, tackifying resin, a plasticizer, an antioxidant, a stabilizer and a defoaming agent.
Figure BDA0004021396520000041
The low-odor hot-melt pressure-sensitive adhesive for the automobile foam compounding is prepared from the following components in parts by weight:
(1) Preparing raw materials comprising thermoplastic elastomer, tackifying resin, plasticizer, antioxidant, stabilizer and defoamer according to the proportion;
(2) Setting the temperature in the vacuum stirring kettle to a preset temperature, sequentially adding a plasticizer, a stabilizer and an antioxidant into the reaction kettle, and adding the thermoplastic elastomer into the reaction kettle for stirring;
(3) Adding tackifying resin, introducing nitrogen for protection and continuing stirring;
(4) Adding a defoaming agent, closing nitrogen, and continuously stirring;
(5) Vacuumizing, discharging by hydraulic pressure, and cooling to obtain a finished product;
in the steps: the thermoplastic elastomer is composed of a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and the mass of the styrene-isoprene-styrene block copolymer and the mass of the styrene-butadiene-styrene block copolymer are mixed; preferably, the mass mixing ratio is 1: (0.1-0.2). Because the styrene-isoprene-styrene block copolymer and the styrene-butadiene-styrene block copolymer are mixed according to a specific proportion to be used as the thermoplastic elastomer, the thermoplastic elastomer has good compatibility with other component raw materials, so that the obtained hot-melt pressure-sensitive adhesive has good infiltration performance and excellent adhesive force, meanwhile, good and stable high-low temperature aging resistance and ultraviolet aging resistance are maintained, the overall weather resistance is excellent, and further, the displacement and warping of a foam composite position are difficult to occur.
The tackifying resin is prepared by uniformly stirring and mixing the following raw materials in percentage by weight: DCPD resin, hydrogenated carbon five petroleum resin, monomeric petroleum resin, polyisobutylene.
The plasticizer is naphthenic oil.
The defoamer is organic silicone.
The stabilizer is any one or two of ultraviolet absorber and light stabilizer; the ultraviolet absorbent is 2- (2-hydroxy-3-tertiary butyl-5-methylphenyl) -5-chlorobenzoazole; the light stabilizer is bis (2, 6-tetramethyl-4-piperidinyl) sebacate;
the antioxidant is composed of hindered phenol antioxidants and phosphite antioxidants according to the mass ratio. The antioxidant is any one or two of hindered phenol antioxidants and phosphite antioxidants.
Specifically, the thermoplastic elastomer, the tackifying resin, the plasticizer, the antioxidant and the stabilizer are prepared from the following components in parts by weight: 20-40 parts of thermoplastic elastomer, 30-50 parts of tackifying resin, 10-20 parts of plasticizer, 0.5-1 part of defoamer, 0.2-1 part of antioxidant and 0.2-1 part of stabilizer.
The melt index of the styrene-isoprene-styrene block copolymer is 18-28g/10min, and the styrene content is 14-22wt%; the melt index of the styrene-butadiene-styrene block copolymer is 0.01-0.5g/10min, and the styrene content is 20-40wt%. By adopting the technical scheme, the styrene-isoprene-styrene block copolymer and the styrene-butadiene-styrene block copolymer with the specifications can play an excellent and stable functional role in the application process.
The tackifying resin is prepared from the following raw materials in percentage by weight: 30-45wt% of DCPD resin; 25-35wt% of hydrogenated carbon five petroleum resin; the method comprises the steps of carrying out a first treatment on the surface of the 20-30wt% of monomer petroleum resin; the polyisobutene accounts for 5-15wt%.
Preferably, the tackifying resin is prepared from the following raw materials in percentage by weight: 35wt% of DCPD resin; 30wt% of hydrogenated carbon five petroleum resin; 25wt% of monomer petroleum resin; the polyisobutene was 10% by weight.
The DCPD resin is obtained by copolymerization of dicyclopentadiene, and the softening point is 95-110 ℃; the softening point of the hydrogenated carbon five petroleum resin is 95-110 ℃; hydrogenated rosin resin softening point: 90-100 ℃; the softening point of the monomer petroleum resin is 110-150 ℃, and the average molecular weight of the polyisobutene is 400-2000.
The stabilizer is any one or two of an ultraviolet absorber and a light stabilizer; the ultraviolet absorbent is 2- (2-hydroxy-3-tertiary butyl-5-methylphenyl) -5-chlorobenzoazole; the light stabilizer is bis (2, 6-tetramethyl-4-piperidinyl) sebacate. In various embodiments, the UV absorber and the light stabilizer may be present in a 1:1 ratio.
Hydrogenated petroleum resin and modified liquid petroleum resin, together with polyisobutene of medium molecular weight, increase viscosity and wettability, and reduce odor.
The defoaming agent is organic silicone, and the organic silicone eliminates small bubbles in the hot-melt pressure-sensitive adhesive, and the viscosity of the resin before the resin is stronger through stirring.
In order to improve the use environment of the hot-melt pressure-sensitive adhesive in an automobile and prevent the phenomenon that foam is separated under long-time high temperature of the automobile, the invention adds organic silicone in the production process of the hot-melt pressure-sensitive adhesive, and eliminates small bubbles generated in the production process, thereby improving the performance of the adhesive in use.
Example 1:
a hot melt pressure sensitive adhesive, which is implemented according to the following steps:
(1) Preparing raw materials of a thermoplastic elastomer, tackifying resin, a plasticizer, a defoaming agent, an antioxidant and a stabilizer according to a proportion;
wherein, the components comprise, by mass, 30 parts of thermoplastic elastomer, 40 parts of tackifying resin, 15 parts of plasticizer, 0.8 part of defoamer, 0.5 part of antioxidant and 0.5 part of stabilizer;
(2) Setting the temperature in the vacuum stirring kettle to 180 ℃, sequentially adding a plasticizer, a stabilizer and an antioxidant into the reaction kettle, and adding the thermoplastic elastomer into the reaction kettle to stir for 90min;
(3) Adding tackifying resin, introducing nitrogen for protection and continuing stirring for 30min;
(4) Adding defoamer, closing nitrogen, and continuing stirring for 5min;
(5) Vacuumizing, discharging by hydraulic pressure, and cooling to obtain a finished product;
wherein the mass mixing ratio of the styrene-isoprene-styrene block copolymer to the styrene-butadiene-styrene block copolymer is 1:0.18;
in the tackifying resin, the weight ratio of each component is as follows: 35wt% of DCPD resin; 30wt% of hydrogenated carbon five petroleum resin; 25wt% of monomer petroleum resin; the polyisobutene was 10% by weight.
Table one: performance experiments were performed on the finished product synthesized in example one:
Figure BDA0004021396520000071
and (II) table: performance test results
Figure BDA0004021396520000072
Following the procedure of example 1, different quality components were provided,
table three: the components and weights thereof provided in examples 2-6:
Figure BDA0004021396520000073
/>
Figure BDA0004021396520000081
table four: performance test results for various embodiments
Figure BDA0004021396520000082
The following are examples without adding defoamers, and the other materials are of the same composition and mass as in examples 1-6.
Table five: comparative example ingredients and mass:
Figure BDA0004021396520000091
table six: performance test results for each comparative example
Figure BDA0004021396520000092
Therefore, by data comparison, after the defoamer is added, the weather resistance and the holding power are obviously increased, and the weather resistance and the holding power can be increased by more than 20%. This is an unexpected effect of increasing the defoamer.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A low-odor hot-melt pressure-sensitive adhesive for automobile foam compounding is characterized in that: the adhesive comprises a thermoplastic elastomer, tackifying resin, plasticizer, antioxidant, stabilizer and defoamer; the thermoplastic elastomer consists of a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and the defoaming agent is organic silicone.
2. The low odor, hot melt pressure sensitive adhesive for automotive foam compounding of claim 1, wherein: the organosilicone is manufactured by You Ni wil company.
3. The low odor, hot melt pressure sensitive adhesive for automotive foam compounding of claim 1, wherein: the thermoplastic elastomer, tackifying resin, plasticizer, antioxidant and stabilizer are calculated according to parts by weight: 20-40 parts of thermoplastic elastomer, 30-50 parts of tackifying resin, 10-20 parts of plasticizer, 0.5-1 part of defoamer, 0.2-1 part of antioxidant and 0.2-1 part of stabilizer.
4. A low odor, hot melt pressure sensitive adhesive for automotive foam compounding as defined in claim 3, wherein: the tackifying resin is prepared from the following raw materials in percentage by weight: 30-45wt% of DCPD resin; 25-35wt% of hydrogenated carbon five petroleum resin; the method comprises the steps of carrying out a first treatment on the surface of the 20-30wt% of monomer petroleum resin; the polyisobutene accounts for 5-15wt%.
5. A low odor, hot melt pressure sensitive adhesive for automotive foam compounding as defined in claim 3, wherein: the tackifying resin is prepared from the following raw materials in percentage by weight: 35wt% of DCPD resin; 30wt% of hydrogenated carbon five petroleum resin; 25wt% of monomer petroleum resin; the polyisobutene was 10% by weight.
6. The low-odor hot-melt pressure-sensitive adhesive for automotive foam composition of claim 1, wherein the stabilizer is any one or both of an ultraviolet absorber and a light stabilizer; the ultraviolet absorbent is 2- (2-hydroxy-3-tertiary butyl-5-methylphenyl) -5-chlorobenzoazole; the light stabilizer is bis (2, 6-tetramethyl-4-piperidinyl) sebacate.
7. A preparation method of a low-odor hot-melt pressure-sensitive adhesive for compounding automobile foam is characterized by comprising the following steps: the method comprises the following steps:
(1) Preparing raw materials comprising thermoplastic elastomer, tackifying resin, plasticizer, antioxidant, stabilizer and defoamer according to the proportion;
(2) Setting the temperature in the vacuum stirring kettle to a preset temperature, sequentially adding a plasticizer, a stabilizer and an antioxidant into the reaction kettle, and adding the thermoplastic elastomer into the reaction kettle for stirring;
(3) Adding tackifying resin, introducing nitrogen for protection and continuing stirring;
(4) Adding a defoaming agent, closing nitrogen, and continuously stirring;
(5) And (5) vacuumizing, discharging by hydraulic pressure, and cooling to obtain a finished product.
CN202211691065.6A 2022-12-27 2022-12-27 Low-odor hot-melt pressure-sensitive adhesive for automobile foam compounding and preparation method thereof Pending CN116083011A (en)

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Application Number Priority Date Filing Date Title
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