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Heat resistance single-component silane modified polyurethane sealant and preparation method thereof

A polyurethane sealant and silane modification technology, applied in the field of sealants, can solve problems such as mechanical property attenuation

Inactive Publication Date: 2012-06-27
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating temperature range of existing silane-modified polyurethane sealants is between 0 and 100°C, and can withstand 120°C for a short time. Under high temperature conditions for a long time, the mechanical properties attenuate significantly

Method used

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  • Heat resistance single-component silane modified polyurethane sealant and preparation method thereof
  • Heat resistance single-component silane modified polyurethane sealant and preparation method thereof
  • Heat resistance single-component silane modified polyurethane sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A heat-resistant silane-modified polyurethane sealant was prepared, the composition of which is shown in Table 1. At the same time, a sealant with the same ratio was prepared without adding cerium oxide. The parts mentioned below are all parts by mass. Put it into the planetary stirring tank according to the stated ratio and dehydrate it under high temperature vacuum for 2 hours. After the temperature of the premix is ​​lowered to below 50°C, add water remover, silane coupling agent, thixotropic agent and catalyst, and stir for 0.5h to obtain a sealant.

[0035]

[0036] After the silane-modified polyurethane sealant is cured, it is placed in an oven for heat-resistant aging test. Its test method is:

[0037] (1) GB / T 528 Determination of tensile properties of vulcanized rubber and thermoplastic rubber;

[0038] (2) GB / T 531 Shore A hardness test method for vulcanized rubber.

[0039] The test results are shown in Table 2 below:

[0040]

Embodiment 2

[0042] A heat-resistant silane-modified polyurethane sealant was prepared, the composition of which is shown in Table 3. At the same time, a sealant with the same proportion was prepared, in which no ferric oxide was added. The parts mentioned below are all parts by mass. Put it into the planetary stirring tank according to the stated ratio and dehydrate it under high temperature vacuum for 2 hours. After the temperature of the premix is ​​lowered to below 50°C, add water remover, silane coupling agent, thixotropic agent and catalyst, and stir for 0.5h to obtain a sealant.

[0043]

[0044] After the prepared modified silane polyether sealant is cured, it is placed in an oven for heat aging test. Its test method is:

[0045] (1) GB / T 528 Determination of tensile properties of vulcanized rubber and thermoplastic rubber;

[0046] (2) GB / T 531 Shore A hardness test method for vulcanized rubber.

[0047] The test results are shown in Table 4:

[0048]

Embodiment 3

[0050] A heat-resistant silane-modified polyurethane sealant was prepared, the composition of which is shown in Table 5. At the same time, a sealant with the same ratio was prepared without adding tin oxide. The parts mentioned below are all parts by mass. Put it into the planetary stirring tank according to the stated ratio and dehydrate it under high temperature vacuum for 2 hours. After the temperature of the premix is ​​lowered to below 50°C, add water remover, silane coupling agent, thixotropic agent and catalyst, and stir for 0.5h to obtain a sealant.

[0051]

[0052] After the prepared modified silane polyether sealant is cured, it is placed in an oven for heat aging test. Its test method is:

[0053] (1) GB / T 528 Determination of tensile properties of vulcanized rubber and thermoplastic rubber;

[0054] (2) GB / T 531 Shore A hardness test method for vulcanized rubber.

[0055] The test results are shown in Table 6:

[0056]

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Abstract

The invention relates to a heat resistance single-component silane modified polyurethane sealant and a preparation method thereof, which belong to the technical field of sealant. Use temperature of the existing silane modified polyurethane sealant all ranges from 0 to 100 DEG C, the existing silane modified polyurethane sealant can bear 120 DEG C for a short time, and a problem of remarkable mechanical property weakening exists if the existing silane modified polyurethane sealant is under a high temperature condition for a long time. The heat resistance single-component silane modified polyurethane sealant is mainly characterized by comprising (A) 30-40% Wt of silane modified polyurethane base polymer, (B) 30-45% Wt of filler, (C) 8-15% Wt of plasticizer, (D) 1-5% Wt of colorant, (E) 0.5-1% Wt of ultraviolet absorber, (F) 0.5-1% Wt of light stabilizer, (G) 0.4-1.5% Wt of heat resisting synergist, (H) 0.5-2% Wt of additive TI, (I) 0.5-2% Wt of silane coupling agent, (K) 0.5-2% Wt of thixtropic agent and (L) 0.2-1% Wt of catalyst. The heat resistance single-component silane modified polyurethane sealant has the advantages that heat resistance performance is greatly improved, and mechanical property after high-temperature ageing is kept well. The heat resistance single-component silane modified polyurethane sealant is mainly used in the industrial fields of automobile industry, railway transportation industry, and new energy industry and the like.

Description

technical field [0001] The invention belongs to the technical field of sealants, and in particular relates to a heat-resistant single-component silane-modified polyurethane sealant and a preparation method thereof. The sealant can be widely used in industries such as the automobile industry, the railway transportation industry, and the new energy industry. field. Background technique [0002] Silane-modified polyurethane sealant combines the advantages of silicone sealant and polyurethane sealant. It has good weather resistance, durability, wide range of bonding, bonding without primer, and can be painted. [0003] Silane-modified polyurethane sealants are widely used in Europe and the United States. In recent years, the domestic sealant market has developed rapidly and has a good momentum of development. The operating temperature range of existing silane-modified polyurethane sealants is between 0°C and 100°C, and can withstand 120°C for a short period of time. Under high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/08C09J11/04C09J11/06C09K3/10
Inventor 张虎极韩胜利王翠花赵瑞章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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