CN114292622A - Hot-melt pressure-sensitive adhesive for house interior decoration wall sticker and preparation method thereof - Google Patents
Hot-melt pressure-sensitive adhesive for house interior decoration wall sticker and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a hot-melt pressure-sensitive adhesive for house interior decoration wall stickers, which comprises the following raw materials in parts by weight: 5-15 parts of styrene-isoprene-styrene block copolymer, 2-8 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-butadiene copolymer, 30-60 parts of tackifier, 20-35 parts of naphthenic oil and 0.5-2 parts of antioxidant. The hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker has the characteristics of good initial adhesion, good permanent adhesion and high peeling strength, is suitable for being pasted on various wall surfaces, is environment-friendly and is biodegradable.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a hot-melt pressure-sensitive adhesive for house interior decoration wall stickers and a preparation method thereof.
Background
The wall sticker is also called instant sticker and random sticker, is a designed and manufactured ready-made self-adhesive sticker and only needs to be pasted manually. Can be pasted on the wall, glass, ceramic tile, cabinet surface and the like, and has excellent decorative effect. The construction method is convenient and fast, and the atmosphere of the space can be changed by locally installing points. The integral decoration style and the personal quality of the master are matched, the life interest of the master is shown, a family is endowed with a new life, and a new home decoration trend is also led. The wall sticker is generally made of PVC materials with glue on the back, is wall home decoration which can be easily set by a user, is concise and convenient, has strong randomness and very visual decorative effect, and is suitable for modern families.
Along with the rapid development of home decoration, the market demand for wall stickers is also rapidly increased, higher requirements are also put forward for back adhesives of the wall stickers, the pasting environments are different, the cost is low, the wall sticker base materials are also various, and in order to solve the problems, a hot-melt pressure-sensitive adhesive which is good in initial adhesion, good in holding adhesion, good in base material adhesion and suitable for adhering more walls needs to be developed.
Disclosure of Invention
The invention aims to provide a hot-melt pressure-sensitive adhesive for house interior decoration wall stickers and a preparation method thereof, and aims to solve the problems of the background art.
In order to achieve the above purpose, the invention provides the following technical scheme:
the hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker comprises the following raw materials in parts by weight: 5-15 parts of styrene-isoprene-styrene block copolymer, 2-8 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-butadiene copolymer, 30-60 parts of tackifier, 20-35 parts of naphthenic oil and 0.5-2 parts of antioxidant; the styrene-isoprene-styrene block copolymer comprises a specification A and a specification B, wherein the SI content of the styrene-isoprene-styrene block copolymer of the specification A is 50%, and the styrene content is 16%; the SI content of the styrene-isoprene-styrene block copolymer of the specification B is 30%, and the styrene content is 19%; the weight ratio of the styrene-isoprene-styrene block copolymer with the specification A to the styrene-isoprene-styrene block copolymer with the specification B is (4-8): (5-15).
Styrene-isoprene-styrene block copolymers (SIS) are triblock copolymers consisting of styrene and isoprene. Because the SIS has a methyl side chain on the middle soft segment, the hot-melt pressure-sensitive adhesive prepared by the SIS has better cohesive force, higher 180-degree peel strength, good initial viscosity, low melt viscosity, convenient use and wide bonding range, and is widely applied to industries of protective clothing sealant, medical adhesive tape, women and infant sanitary products, high-grade labels, express adhesive tapes and the like. The styrene-isoprene-styrene triblock copolymer (SIS) has the properties of vulcanized rubber at room temperature and plasticity at high temperature, the excellent performance of the SIS is determined by the specific morphological structure of the SIS, the SIS is a two-phase structure seen by electron microscope observation, and when the mass fraction of the styrene is lower than 30 percent, a restraint component-micro region is formed and plays the roles of 'vulcanization' and reinforcement in a polyisoprene continuous phase, so that the SIS has the elasticity, strength and wear resistance at room temperature. When heated above the softening point of the styrene segment, the segment will move, rendering the SIS plastic; when the temperature drops, the polystyrene sections are aggregated into micro-areas to restore the original elasticity and strength. In order to ensure the quality stability of the hot-melt pressure-sensitive adhesive product, the invention selects two specifications of styrene-isoprene-styrene block copolymers, namely the A specification styrene-isoprene-styrene block copolymer 4019 produced from Yueyanized rubber and the B specification styrene-isoprene-styrene block copolymer 8161 produced from Jinhai rubber, and the stability of the quality of the hot-melt pressure-sensitive adhesive product can be greatly improved by matching the proper proportion of the SI content and the styrene content of the two specifications of styrene-isoprene-styrene block copolymers.
The styrene-butadiene-styrene block copolymer and the styrene-butadiene copolymer are produced by using the Yuelization rubber, have excellent aging resistance and thermal stability, and the glue solution becomes more viscous after aging, can be complementary with the styrene-isoprene-styrene block copolymer, make up for the defect that the glue solution becomes thin after the styrene-isoprene-styrene block copolymer is aged, and improve the stability of the product.
The glue prepared from the naphthenic oil has lower cost and better heat resistance and cohesion. The adhesive has the main characteristics of large molecular weight and strong bonding force with adhesive materials, can greatly improve the strength of the adhesive and stabilize the quality of the adhesive. The product is produced by high-pressure hydrogenation under proper conditions, no additive is added, and the naphthenic oil has high flash point, high viscosity and light color, so that the stability of the naphthenic oil is improved, and the stability of a hot-melt pressure-sensitive adhesive system is greatly improved.
Further, the melt index of the styrene-isoprene-styrene block copolymer at the condition of 120 ℃/5kg is 10-20g/10 min.
Further, the melt index of the styrene-butadiene-styrene block copolymer is 10 to 20g/10min at the condition of 120 ℃/5 kg.
Further, the styrene-butadiene copolymer has a density ranging from 0.87 to 0.95g/cmз。
The styrene-butadiene copolymer has the advantages of good dispersibility, good self-adhesion and mutual adhesion, good weather resistance and the like, the molecular structure of the olefin copolymer is similar to the molecular structure of wax, and the density range is selected to be 0.87-0.95g/cmзThe adhesive can be cured quickly, can provide good bonding strength, plays a role in improving the curing speed of the whole formula, can prevent glue solution from flowing to permeate a base material, and improves the anti-reverse osmosis effect.
Further, the tackifier is a mixture of C5 petroleum resin and perhydrogenated C9 petroleum resin.
Further, the weight ratio of the C5 petroleum resin to the fully hydrogenated C9 petroleum resin is (1-3): (3-9).
In order to improve the main performance, a tackifier is required to be added into the hot-melt pressure-sensitive adhesive. According to the difference of mutual compatibility behavior with two-phase structure of styrene-isoprene-styrene block copolymer SIS, the common tackifier is divided into two types, one type is compatible with soft segment rubber phase and comprises various aliphatic and alicyclic petroleum resins, modified rosin and the like; another class of resins that are only plastic compatible includes aromatic petroleum resins, coumarone-indene resins, and the like. In principle, the former is soluble in the rubber phase, can reduce the modulus and cohesive strength of the adhesive system, and improve the viscoelasticity, adhesiveness and pressure sensitivity of the system; the latter dissolves in the plastic phase, increasing the plastic domain, thereby altering the system modulus, cohesive strength, adhesion. Considering that the tackifier is compatible with SIS and can reduce the viscosity of mixture melt and solution so as to be beneficial to the processing of the subsequent process, the invention adopts C5 petroleum resin W1100 of Shandong Luhua and hydrogenated C9 petroleum resin L-2100H of Xinjiang Tianli industry, and the weight ratio of the C5 petroleum resin to the fully hydrogenated C9 petroleum resin is set as (1-3): (3-9), can be well compatible with styrene-isoprene-styrene block copolymer SIS, and can reduce the viscosity of mixture melt and solution, thus being more beneficial to the processing of subsequent procedures and simultaneously improving the peeling strength of the hot melt pressure sensitive adhesive.
Further, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168.
Further, the weight ratio of the antioxidant 1010 to the antioxidant 168 is (2-3): 1. the two antioxidants are used simultaneously, the synergistic effect is obvious, the thermal degradation and the oxidative degradation of the hot-melt pressure-sensitive adhesive can be effectively inhibited, and the bonding stability is improved.
The invention also provides a preparation method of the hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker, which comprises the following steps:
s1, preheating the inside of a reaction kettle to 120-130 ℃;
s2, adding part of naphthenic oil in the temperature rise process of the reaction kettle, and stirring;
s3, adding a styrene-butadiene copolymer under the stirring condition, sequentially adding a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and controlling the material temperature to be 140 ℃ so as to completely melt the materials;
s4, adding C5 petroleum resin, hydrogenated C9 petroleum resin and residual naphthenic oil into the reaction kettle under the stirring condition, controlling the material temperature to 130-135 ℃, reducing the stirring speed to 30-35 r/min, and vacuumizing for 30-50 min;
and S5, after the mixed materials in the reaction kettle are completely melted and uniformly mixed, pressurizing, filtering, discharging into a mold, and cooling to obtain the material.
Compared with the prior art, the hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker provided by the invention has the following beneficial effects:
the hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker has the characteristics of good initial adhesion, good permanent adhesion and high peeling strength, is suitable for being pasted on various wall surfaces, is environment-friendly and is biodegradable.
The hot melt pressure sensitive adhesive for the house interior decoration wall sticker is suitable for a high-speed coating machine.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The following table one is a specification index of the raw materials used in each example.
Watch 1
Example 1
The hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker comprises the following raw materials in parts by weight: 15 parts of styrene-isoprene-styrene block copolymer, 2 parts of styrene-butadiene-styrene block copolymer, 20 parts of styrene-butadiene copolymer, 30 parts of tackifier, 35 parts of naphthenic oil and 0.5 part of antioxidant; the styrene-isoprene-styrene block copolymer comprises a specification A and a specification B, wherein the SI content of the styrene-isoprene-styrene block copolymer of the specification A is 50%, and the styrene content is 16%; the SI content of the styrene-isoprene-styrene block copolymer of the specification B is 30%, and the styrene content is 19%; the weight ratio of the styrene-isoprene-styrene block copolymer with the specification A to the styrene-isoprene-styrene block copolymer with the specification B is 4: 15.
the melt index of the styrene-isoprene-styrene block copolymer under the condition of 120 ℃/5kg is 10g/10 min.
The styrene-butadiene-styrene block copolymer had a melt index of 20g/10min at 120 ℃/5 kg.
The density of the styrene-butadiene copolymer was in the range of 0.95g/cmз。
The tackifier is a mixture of C5 petroleum resin and fully hydrogenated C9 petroleum resin, and the weight ratio of the C5 petroleum resin to the fully hydrogenated C9 petroleum resin is 1: 9.
the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, wherein the weight ratio of the antioxidant 1010 to the antioxidant 168 is 2: 1.
the preparation method of the embodiment comprises the following steps:
s1, preheating the inside of a reaction kettle to 130 ℃;
s2, adding part of naphthenic oil in the temperature rise process of the reaction kettle, and stirring;
s3, adding a styrene-butadiene copolymer under the stirring condition, sequentially adding a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and controlling the temperature of the material to 120 ℃ to completely melt the material;
s4, adding C5 petroleum resin, hydrogenated C9 petroleum resin and residual naphthenic oil into the reaction kettle under the stirring condition, controlling the material temperature to 135 ℃, reducing the stirring speed to 35 revolutions per minute, and vacuumizing for 30 minutes;
and S5, after the mixed materials in the reaction kettle are completely melted and uniformly mixed, pressurizing, filtering, discharging into a mold, and cooling to obtain the material.
Example 2
The hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker comprises the following raw materials in parts by weight: 5 parts of styrene-isoprene-styrene block copolymer, 8 parts of styrene-butadiene-styrene block copolymer, 10 parts of styrene-butadiene copolymer, 60 parts of tackifier, 20 parts of naphthenic oil and 2 parts of antioxidant; the styrene-isoprene-styrene block copolymer comprises a specification A and a specification B, wherein the SI content of the styrene-isoprene-styrene block copolymer of the specification A is 50%, and the styrene content is 16%; the SI content of the styrene-isoprene-styrene block copolymer of the specification B is 30%, and the styrene content is 19%; the weight ratio of the styrene-isoprene-styrene block copolymer with the specification A to the styrene-isoprene-styrene block copolymer with the specification B is 8: 5.
the melt index of the styrene-isoprene-styrene block copolymer at 120 ℃/5kg is 20g/10 min.
The styrene-butadiene-styrene block copolymer had a melt index of 10g/10min at 120 ℃/5 kg.
The density of the styrene-butadiene copolymer is in the range of 0.87g/cmз。
The tackifier is a mixture of C5 petroleum resin and fully hydrogenated C9 petroleum resin, and the weight ratio of the C5 petroleum resin to the fully hydrogenated C9 petroleum resin is 3: 5.
the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, wherein the weight ratio of the antioxidant 1010 to the antioxidant 168 is 3: 1.
the preparation method of the embodiment comprises the following steps:
s1, preheating the inside of a reaction kettle to 120 ℃;
s2, adding part of naphthenic oil in the temperature rise process of the reaction kettle, and stirring;
s3, adding a styrene-butadiene copolymer under the stirring condition, sequentially adding a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and controlling the material temperature to 140 ℃ to completely melt the materials;
s4, adding C5 petroleum resin, hydrogenated C9 petroleum resin and residual naphthenic oil into the reaction kettle under the stirring condition, controlling the material temperature to 130 ℃, reducing the stirring speed to 30 revolutions per minute, and vacuumizing for 50 minutes;
and S5, after the mixed materials in the reaction kettle are completely melted and uniformly mixed, pressurizing, filtering, discharging into a mold, and cooling to obtain the material.
Example 3
The hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker comprises the following raw materials in parts by weight: 10 parts of styrene-isoprene-styrene block copolymer, 6 parts of styrene-butadiene-styrene block copolymer, 15 parts of styrene-butadiene copolymer, 45 parts of tackifier, 30 parts of naphthenic oil and 1 part of antioxidant; the styrene-isoprene-styrene block copolymer comprises a specification A and a specification B, wherein the SI content of the styrene-isoprene-styrene block copolymer of the specification A is 50%, and the styrene content is 16%; the SI content of the styrene-isoprene-styrene block copolymer of the specification B is 30%, and the styrene content is 19%; the weight ratio of the styrene-isoprene-styrene block copolymer with the specification A to the styrene-isoprene-styrene block copolymer with the specification B is 6: 11.
the melt index of the styrene-isoprene-styrene block copolymer at 120 ℃/5kg is 5g/10 min.
The styrene-butadiene-styrene block copolymer had a melt index of 15g/10min at 120 ℃/5 kg.
The density of the styrene-butadiene copolymer was in the range of 0.91g/cmз。
The tackifier is a mixture of C5 petroleum resin and fully hydrogenated C9 petroleum resin, and the weight ratio of the C5 petroleum resin to the fully hydrogenated C9 petroleum resin is 1: 3.
the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, wherein the weight ratio of the antioxidant 1010 to the antioxidant 168 is 2.5: 1.
the preparation method of the embodiment comprises the following steps:
s1, preheating the inside of a reaction kettle to 125 ℃;
s2, adding part of naphthenic oil in the temperature rise process of the reaction kettle, and stirring;
s3, adding a styrene-butadiene copolymer under the stirring condition, sequentially adding a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and controlling the temperature of the material to 130 ℃ to completely melt the material;
s4, adding C5 petroleum resin, hydrogenated C9 petroleum resin and residual naphthenic oil into the reaction kettle under the stirring condition, controlling the material temperature to 130 ℃, reducing the stirring speed to 35 revolutions per minute, and vacuumizing for 40 minutes;
and S5, after the mixed materials in the reaction kettle are completely melted and uniformly mixed, pressurizing, filtering, discharging into a mold, and cooling to obtain the material.
Comparative example 1
The difference from example 3 is that the styrene-isoprene-styrene block copolymer in comparative example 1 is only an a-size styrene-isoprene-styrene block copolymer.
Comparative example 2
The difference from example 3 is that the styrene-isoprene-styrene block copolymer in comparative example 2 is only a styrene-isoprene-styrene block copolymer of B-size.
Comparative example 3
The difference from example 3 is that no styrene-butadiene-styrene block copolymer was added in comparative example 3.
Comparative example 4
The difference from example 3 is that no styrene-butadiene copolymer was added in comparative example 4.
The following performance tests were performed on the wall pastes obtained in the above specific examples, and the test results are shown in table two below:
watch two
Note: in Table two, the softening point is tested by using the national standard GB-T15332-94, the peel strength is tested by using the national standard GB-T2792-1998, the ring initial adhesion is tested by using the national standard GB/T31125-2014, and the permanent adhesion is tested by using the national standard GB-T4851-1998.
As can be seen from Table 2, the overall performance of examples 1-3 is better than that of comparative examples 1-4, wherein the peel strength and the ring-shaped initial adhesion holding power of examples 1-3 are both much better than those of comparative examples 1-4, which indicates that the compounding of the styrene-isoprene-styrene block copolymers of specifications A and B has a synergistic effect, and the styrene-isoprene-styrene block copolymers, the styrene-butadiene-styrene block copolymers and the styrene-butadiene copolymers of the two specifications have a synergistic effect.
The features of the embodiments and embodiments described above may be combined with each other without conflict.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker is characterized by comprising the following raw materials in parts by weight: 5-15 parts of styrene-isoprene-styrene block copolymer, 2-8 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-butadiene copolymer, 30-60 parts of tackifier, 20-35 parts of naphthenic oil and 0.5-2 parts of antioxidant; the styrene-isoprene-styrene block copolymer comprises a specification A and a specification B, wherein the SI content of the styrene-isoprene-styrene block copolymer of the specification A is 50%, and the styrene content is 16%; the SI content of the styrene-isoprene-styrene block copolymer of the specification B is 30%, and the styrene content is 19%; the weight ratio of the styrene-isoprene-styrene block copolymer with the specification A to the styrene-isoprene-styrene block copolymer with the specification B is (4-8): (5-15).
2. The hot-melt pressure-sensitive adhesive for interior house decoration wall sticker according to claim 1, wherein the melt index of the styrene-isoprene-styrene block copolymer at 120 ℃/5kg is 10-20g/10 min.
3. The hot-melt pressure-sensitive adhesive for interior house decoration wall sticker according to claim 1, wherein the melt index of the styrene-butadiene-styrene block copolymer at 120 ℃/5kg is 10-20g/10 min.
4. The hot-melt pressure-sensitive adhesive for interior house decoration wall sticker according to claim 1, wherein the density of the styrene-butadiene copolymer is in the range of 0.87-0.95g/cmз。
5. The hot-melt pressure-sensitive adhesive for interior house decoration wall sticker according to claim 1, wherein the tackifier is a mixture of C5 petroleum resin and perhydrogenated C9 petroleum resin.
6. The hot-melt pressure-sensitive adhesive for interior house decoration wall plasters according to claim 5, wherein the weight ratio of the C5 petroleum resin to the perhydrogenated C9 petroleum resin is (1-3): (3-9).
7. The hot-melt pressure-sensitive adhesive for indoor decoration wall plasters according to claim 1, wherein the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168.
8. The hot-melt pressure-sensitive adhesive for the house interior decoration wall sticker as claimed in claim 7, wherein the ratio by weight of the antioxidant 1010 to the antioxidant 168 is (2-3): 1.
9. a method for producing the hot melt pressure sensitive adhesive for interior house decoration wall sticker according to any one of claims 1 to 8, comprising the steps of:
s1, preheating the inside of a reaction kettle to 120-130 ℃;
s2, adding part of naphthenic oil in the temperature rise process of the reaction kettle, and stirring;
s3, adding a styrene-butadiene copolymer under the stirring condition, sequentially adding a styrene-isoprene-styrene block copolymer and a styrene-butadiene-styrene block copolymer, and controlling the material temperature to be 140 ℃ so as to completely melt the materials;
s4, adding C5 petroleum resin, hydrogenated C9 petroleum resin and residual naphthenic oil into the reaction kettle under the stirring condition, controlling the material temperature to 130-135 ℃, reducing the stirring speed to 30-35 r/min, and vacuumizing for 30-50 min;
and S5, after the mixed materials in the reaction kettle are completely melted and uniformly mixed, pressurizing, filtering, discharging into a mold, and cooling to obtain the material.
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