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Hot-melt pressure-sensitive adhesive and preparation method thereof

A hot-melt, pressure-sensitive adhesive technology, used in adhesives, adhesive types, mineral oil-hydrocarbon copolymer adhesives, etc. Poor performance, etc.

Active Publication Date: 2018-01-19
HUIZHOU NENGHUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing self-adhesive film waterproof coiled material hot-melt pressure-sensitive adhesive mainly uses thermoplastic styrene-butadiene rubber SIS (styrene-isoprene-styrene block copolymer) as the base material, and then supplemented with various additives to meet various requirements. However, the cost is high; or butyl rubber is used as the substrate, but the coating amount is large and cannot meet the requirements of heat resistance and low temperature bending resistance in GB / T23457-2009 "Pre-laid / wet-laid waterproof membrane" at the same time , that is, the waterproof performance is poor

Method used

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  • Hot-melt pressure-sensitive adhesive and preparation method thereof

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preparation example Construction

[0025] see figure 1 , the preparation method of hot-melt pressure-sensitive adhesive in one embodiment, comprises the steps:

[0026] S110: Mix butyl rubber, hydrogenated styrene-butadiene block copolymer thermoplastic elastomer, rubber plasticizer and antioxidant, gradually raise the temperature to 150°C-170°C, and carry out heat preservation reaction operation; wherein, butyl The mass ratio of base rubber, hydrogenated styrene-butadiene block copolymer thermoplastic elastomer, rubber plasticizer and antioxidant is (15~25):(5~15):(25~35):(0.3 ~1).

[0027] Through the step S110, the butyl rubber, the hydrogenated styrene-butadiene block copolymer thermoplastic elastomer, the rubber plasticizer and the antioxidant can be better mixed, which is more conducive to mixing with subsequent raw materials.

[0028] S120: adding hydrogenated synthetic resin and poly-α-methylstyrene hydrogenated resin, and performing mixing operation, and then performing cooling molding operation to o...

Embodiment 1

[0034] Add 2kg of butyl rubber, 1kg of SEBS (hydrogenated styrene-butadiene block copolymer), 3.5kg of rubber plasticizer and antioxidant into the kneader according to the required ratio; then, slowly heat to 150-170 ℃, stir until all the materials are melted, and the reaction is stable for 5-20 minutes; then, under stirring, add 2.5kg of hydrogenated synthetic resin and 2.5kg of poly-α-methylstyrene hydrogenated resin according to the required ratio, and stir for 45-60 minutes ; Finally, cooling molding treatment, that is, to obtain the required self-adhesive film waterproof membrane hot-melt pressure-sensitive adhesive.

[0035] Wherein, the butyl rubber unsaturation (% / mol) is 1%, Mooney viscosity (ML 1+8 , 125°C) is 45; the styrene block content of the hydrogenated styrene-butadiene block copolymer thermoplastic elastomer is 20%; the average molecular weight of the liquid polyisobutylene rubber is 500.

Embodiment 2

[0037] Add butyl rubber 2.5kg, SEBS (hydrogenated styrene-butadiene block copolymer) 1.2kg, rubber plasticizer 3.2kg and antioxidant into the kneader according to the required ratio; then, slowly heat to 150 ~170°C, stir until all the materials are melted, and the reaction is stable for 5-20 minutes; then, under stirring, add 3.5kg of hydrogenated synthetic resin and 2.5kg of poly-α-methylstyrene hydrogenated resin according to the required ratio, and stir for a constant 45- 60 minutes; finally, cooling molding treatment, that is, to obtain the required self-adhesive film waterproof membrane hot-melt pressure-sensitive adhesive.

[0038] Wherein, the butyl rubber unsaturation (% / mol) is 1%, Mooney viscosity (ML 1+8 , 125°C) is 45; the styrene block content of the hydrogenated styrene-butadiene block copolymer thermoplastic elastomer is 20%; the average molecular weight of the liquid polyisobutylene rubber is 500.

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Abstract

The invention relates to a hot-melt pressure-sensitive adhesive and a preparation method of the pressure-sensitive adhesive. The pressure-sensitive adhesive comprises the following ingredients in parts by mass: 15-25 parts of butyl rubber, 5-15 parts of hydrogenated styrene-butadiene segmented copolymer thermoplastic elastomers, 25-35 parts of hydrogenated synthetic resin, 15-25 parts of poly- alpha methyl styrene hydrogenated resin, 25-35 parts of a rubber plasticizer and 0.3-1 part of an antioxidant. The hot-melt pressure-sensitive adhesive solves the disadvantages of small cohesion and poorthermal creep resistance of butyl rubber and can also achieve good mutual dissolution; since the butyl rubber hot-melt pressure-sensitive adhesive has a good bonding property with various high polymer coiled materials and good ultraviolet aging resistance, when the pressure-sensitive adhesive is applied to the self-adhesive film water-proof coiled materials, the pressure-sensitive adhesive has the characteristics of excellent high and low temperature resistance, excellent ultraviolet aging resistance, high stripping strength with cement mortar after bonding, a wide application scope of the water-proof coiled materials, low cost and the like, and is better in water-proof performance.

Description

technical field [0001] The invention relates to the technical field of hot-melt pressure-sensitive adhesives, in particular to a hot-melt pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Since the publication of GB 50108-2008 "Technical Specifications for Waterproofing of Underground Engineering" and GB / T 23457-2009 "Pre-laid / Wet-laid Waterproof Membrane", the application fields of polymer self-adhesive waterproof membranes have become wider and wider. The existing self-adhesive film waterproof coiled material hot-melt pressure-sensitive adhesive mainly uses thermoplastic styrene-butadiene rubber SIS (styrene-isoprene-styrene block copolymer) as the base material, and then supplemented with various additives to meet various requirements. However, the cost is high; or butyl rubber is used as the substrate, but the coating amount is large and cannot meet the requirements of heat resistance and low temperature bending resistance in GB / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J157/02C09J125/16C09J123/22C09J11/08
Inventor 江强吴兆辉蓝黎雄郭亦彬
Owner HUIZHOU NENGHUI CHEM CO LTD
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