Transparent two-component silane-modified polyether sealant and preparation method thereof

A silane-modified polyether, two-component technology, applied in the field of sealants, can solve the problems of limiting the application of silane-modified polyether sealants, health and environmental hazards, slow deep curing, etc. Stable construction, fast deep curing effect

Active Publication Date: 2021-06-29
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the mainstream silane-modified polyether sealant on the market is an opaque paste-like one-component rubber compound with organotin as the catalyst. Although it can obtain high strength and toughness and is easy to use, it needs high temperature dehydration and cooling during production. , long cycle and high cost; and the curing depends on the moisture in the air, which is significantly affected by the external environment. The surface dries slowly when the humidity is low and the temperature is low, and the surface dries quickly when the humidity is high and the temperature is high. The curing is from the surface to the inside, and the deep layer is cured. Slow, the general 24h curing thickness is 4 ~ 6mm, and organotin as a catalyst has certain harm to health and environment, and the European Union has restricted its use since 2010
At the same time, the paste-like silane-modified polyether sealant has limited its application in occasions requiring transparency due to its non-transparency, such as high-end residential interior decoration and bonding of automobile windshields. Transparent silicone glue and high mechanical strength polyurethane sealant
However, transparent silane-modified polyether sealants have defects such as low strength and poor adhesion to common substrates such as aluminum, stainless steel, and glass, resulting in no mature transparent silane-modified polyether sealants for sale in China. To a certain extent, the application of silane-modified polyether sealant is limited

Method used

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  • Transparent two-component silane-modified polyether sealant and preparation method thereof
  • Transparent two-component silane-modified polyether sealant and preparation method thereof
  • Transparent two-component silane-modified polyether sealant and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0060] In one of the embodiments, the preparation method of the silicone-modified epoxy resin comprises the following steps:

[0061] After mixing the silane monomer with the solvent, under the catalysis of the catalyst, react at 75-85°C for 3-7 hours to obtain the silicone; then mix the silicone with polyetheramine curing agent, epoxy resin Mix and react for 2-4 hours to obtain the organosilicon-modified epoxy resin. Specifically, the solvent can be 1,4-dioxane, the catalyst can be dibutyltin dilaurate; the polyetheramine curing agent can be polyetheramine curing agent D230, so The epoxy resin may be epoxy resin 828.

[0062] In one embodiment, the weight ratio of the silicone, polyetheramine curing agent and epoxy resin is 1:8-10:3-5.

[0063] More specifically, in the following Examples 1-4 and Comparative Example 2, the preparation steps of the silicone-modified epoxy resin are as follows:

[0064] (1) Silicone resin synthesis: Dimethyldiethoxysilane, γ-aminopropyltriet...

Embodiment 1

[0077] This example is a transparent two-component silane-modified polyether glue, and its raw material composition is as follows:

[0078] A component:

[0079]

[0080] B component:

[0081]

[0082] Component A is prepared by the following method: adding the silane-modified polyether, epoxy resin, plasticizer, fumed silica, light stabilizer, crosslinking agent, and coupling agent to the planetary feed tank, Vacuum stirring until the appearance is uniform to obtain component A;

[0083] The B component is prepared by the following method: add the plasticizer and amine catalyst into the planetary material tank, and stir in a vacuum at low speed until the appearance is uniform to obtain the B component.

[0084] When sizing, mix the above-mentioned components A and B according to the mass ratio of 10:1.

Embodiment 2

[0086] This example is a transparent two-component silane-modified polyether glue, and its raw material composition is as follows:

[0087] A component:

[0088]

[0089] B component:

[0090]

[0091] Component A is prepared by the following method: adding the silane-modified polyether, epoxy resin, plasticizer, fumed silica, light stabilizer, crosslinking agent, and coupling agent to the planetary feed tank, Vacuum stirring until the appearance is uniform to obtain component A;

[0092] The B component is prepared by the following method: add the plasticizer and amine catalyst into the planetary material tank, and stir in a vacuum at low speed until the appearance is uniform to obtain the B component.

[0093] When sizing, mix the above-mentioned components A and B according to the mass ratio of 10:1.

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Abstract

The invention relates to a transparent two-component silane-modified polyether sealant and a preparation method thereof. The transparent two-component silane-modified polyether sealant includes: component A, in weight percent, made of raw materials including the following components: 30-60% of silane-modified polyether, silicone-modified epoxy Resin 10-50%, plasticizer 0-40%, thixotropic agent 5-10%, light stabilizer 1-5%, cross-linking agent 1-5%; B component, by weight percentage, consists of the following The components are made of raw materials: plasticizer 50-80%, amine catalyst 20-50%. The silane-modified polyether sealant has the characteristics of high transparency, high strength and good bonding performance at the same time, and does not need to use an organic tin catalyst, the inner and outer layers are cured simultaneously, and the construction property is good.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a transparent two-component silane-modified polyether sealant and a preparation method thereof. Background technique [0002] Silane-modified polyether sealant has moisture curing characteristics due to its special polyether main chain structure and siloxane end group structure of the base polymer, so it has both the performance advantages of polyurethane and silicone sealants, and has environmental protection. Friendly, low staining, good finish, good weather resistance and durability, good bonding performance, convenient sizing and other performance and application characteristics. Therefore, its application in construction, rail transit, automobile, electronic appliances and other industrial fields has attracted more and more attention and attention. [0003] At present, the mainstream silane-modified polyether sealant on the market is an opaque paste-like one-component rubb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/12C09J163/00
CPCC08L2201/10C09J183/12C08L63/00
Inventor 陈洋庆陈建军高敏华龙飞
Owner GUANGZHOU BAIYUN CHEM IND
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