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Reactive polyurethane sealant composition and preparation method thereof

A technology of polyurethane sealant and composition, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., to achieve the effects of high safety factor, improved tensile strength, and high crosslinking density

Inactive Publication Date: 2017-09-19
江苏海川卓越密封材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above technical problems, the present invention provides a reactive polyurethane sealant composition and a preparation method thereof to solve the problem of fast realization of deep curing, good elastic recovery force and high tensile elongation, good adhesion to substrates and no corrosion. question

Method used

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  • Reactive polyurethane sealant composition and preparation method thereof

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Embodiment 1

[0025] Embodiment 1: the preparation ratio of each raw material in the reactive polyurethane sealant composition

[0026] The raw materials in the reactive polyurethane sealant composition were mixed in parts by mass as described in Table 1 to obtain three groups of reactive polyurethane sealant compositions I to III with different mixing ratios.

[0027] Table 1 The reactive polyurethane sealant composition of different mixing ratios (parts by mass)

[0028]

Embodiment 2

[0029] Embodiment 2: the preparation method of reactive polyurethane sealant composition

[0030] Step 1. Preparation of modified epoxy glue: Put 18 parts of linseed oil and 15 parts of phthalic anhydride into the reaction kettle, raise the temperature to 80°C, control the stirring speed to 300r / min, and after the reaction is uniform, lower the system temperature to 70°C, add 40 parts of glycidyl ether type epoxy resin and stir evenly, lower the system temperature to 30°C, then dissolve 35 parts of trimethylolpropane tris(2-piperazinylethyl)aminocrotonate in 20 Parts of ethyl acetate, then added dropwise to the reactor, stirred while adding dropwise, and kept warm for 15min after the dropwise addition, to obtain the modified epoxy glue;

[0031] Preparation of modified biomass material: first dry the biomass material until the moisture content is below 16%, crush it into a powder of 100-400 mesh, then place the powder in 1mol / L hydrochloric acid at 80°C and stir evenly, soak f...

Embodiment 3

[0034] Embodiment 3: the preparation method of reactive polyurethane sealant composition

[0035]Step 1. Preparation of modified epoxy glue: Put 30 parts of linseed oil and 25 parts of phthalic anhydride into the reaction kettle, raise the temperature to 110°C, control the stirring speed at 600r / min, and after the reaction is uniform, lower the system temperature to 90°C, add 55 parts of novolak type epoxy resin and stir evenly, lower the system temperature to 40°C, then dissolve 50 parts of trimethylolpropane tris(2-piperazinylethyl)amino crotonate in 40 parts in ethyl acetate, and then added dropwise to the reaction kettle, stirring while adding dropwise, and keeping warm for 30 minutes after the dropwise addition, to obtain the modified epoxy glue;

[0036] Preparation of modified biomass material: first dry the biomass material until the moisture content is below 16%, crush it into a powder of 100-400 mesh, then place the powder in 1mol / L hydrochloric acid at 80°C and stir...

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Abstract

The invention discloses a reactive polyurethane sealant composition and a preparation method thereof, which consist of high molecular polyol, polyisocyanate, catalyst, plasticizer, antioxidant, modified epoxy glue and modified biomass material. Compared with the prior art, the reactive polyurethane sealant composition of the present invention uses the introduced epoxy glue to modify the polyurethane glue. In addition to retaining the original characteristics, the cured product has a dense structure and high crosslinking density; The introduction of modified biological materials, through the surface treatment of agricultural and forestry biological materials with amino silane coupling agents after ashing, effectively improves the comprehensive properties of polyurethane sealants such as tensile strength, elongation at break and tear strength. ; The preparation method of the reactive polyurethane sealant composition of the present invention is simple to operate, the reaction is controllable, and the safety factor is high.

Description

technical field [0001] The invention relates to the field of sealant compositions, in particular to a reactive polyurethane sealant composition and a preparation method thereof. Background technique [0002] Sealant is a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. It is an adhesive used to fill the configuration gap and seal it. It has the functions of anti-leakage, waterproof, anti-vibration, sound insulation and heat insulation, and can be widely used in the sealing of construction, transportation, electronic instruments and parts. [0003] Polyurethane sealant not only has excellent performance, but also has elasticity, and has remarkable effects in waterproofing, sealing, and bonding. In the formulation design and production process, in order to increase the thixotropy of polyurethane sealants and reduce costs, the usual measure is to add inorganic fillers under the premise of ensuring ...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04C09J11/06C08G18/67C08G18/48C08G18/42C08G59/14
CPCC09J175/14C08G18/4277C08G18/48C08G18/4833C08G18/6705C08G59/14C08K5/103C08K5/12C08K9/06C09J11/04C09J11/06
Inventor 吴德斌
Owner 江苏海川卓越密封材料有限公司
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