Single component surface decorative organic silicon sealing material and its preparation process and application

A sealing material, silicone technology, applied in the direction of chemical instruments and methods, other chemical processes, etc., can solve the problem of high activity of amide crosslinking agent and primary amino group, not involved in improving the coatability of latex paint, and improving the water-based latex paint Insufficient effect and other problems, achieve stable performance, improve storage stability, and excellent weather aging resistance

Active Publication Date: 2006-06-28
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, U.S.P.3542.714 proposes that the organic solution containing rosin resin is blended into ordinary silicon sealing materials, which can improve the coatability, but there is a problem of solvent pollution; Improve coatability, this patent also has solvent pollution and solvent volatilization and shrinkage, which reduces the adhesion between the sealant and the substrate; U.S.P.4358.558 proposes to add a linear or branched polysilicon containing basic nitrogen groups Oxane is used to improve the paintability, but the synthesis process is cumbersome and does not involve improving the paintability of latex paint; U.S.P.4515.834 is to add dialkoxy groups with amino and acyloxy functional groups in the amide crosslinking system Silane, amide cross-linking agent and primary amino group are highly active, and the product is prone to yellowing, high price, and strong taste; U.S.P.5338.574 proposes to add tung oil and amino-containing tackifier to the sealant, and the modified sealant has good oil compatibility. The improvement effect of alkyd paint is obvious, but the improvement effect of water-based latex paint is not good, and the storage stability is not very good after adding tung oil

Method used

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  • Single component surface decorative organic silicon sealing material and its preparation process and application
  • Single component surface decorative organic silicon sealing material and its preparation process and application
  • Single component surface decorative organic silicon sealing material and its preparation process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]100 parts of hydroxyl-terminated polydimethylsiloxane (25°C, 35,000cP), 100 parts of dry ultrafine activated calcium carbonate (produced by Hunan Jinxin Chemical Co., Ltd., with particle size in 0.04-20μm) in a mixer and under vacuum sealing for 2-3 hours to obtain a uniform base compound, then add 8 parts of methyltributanone oximinosilane and stir in vacuum for 8-15 minutes, then add 0.1 part of dibutyldi Tin laurate, 2 parts of self-made modified silane coupling agent 6A or 7A, DL-602, KH-792, stirred for 5-10 minutes under vacuum sealed conditions, after removing air bubbles and some low molecular weight substances generated in the reaction, Store tightly sealed.

[0026] The prepared silicone sealant is evenly coated in a 2mm deep mold or a thin layer of the cured sealant without modifier added as a primer, and cured at room temperature for 2, 8, 24, 48 After an hour, apply oily alkyd paint and polyurethane paint evenly on it. After the coatings were cured for 2 a...

Embodiment 2

[0060] The silicone sealant was prepared according to the method of Example 1, and 1%, 2% and 3% of 6A were added respectively under the condition that other components remained unchanged, and the surface coatability of the oil-soluble paint was tested. Table 1 rating system to compare the adhesion of coatings to sealants. The test results are shown in Table 9 and Table 10.

[0061] Using the national standard GB / T13477-92 for sample preparation and testing, the silicone sealing material was made into H-type samples, vulcanized and cross-linked for 28 days under the conditions of 25 ° C and 50% RH, and the bonding strength to glass was tested. The sample is five samples, and the average test results are shown in Table 11.

[0062] Table 9 Influence of sealant on the coatability of alkyd paint when adding different amounts of 6A

[0063]

[0064] Table 10 The effect of sealant on the coatability of polyurethane paint when adding different amounts of 6A

[0065]

[0066...

Embodiment 3

[0071] The silicone sealant was prepared according to the method of Example 1. Under the condition that other components remain unchanged, 3% methacryloyl propyl trimethoxysilane (trade name KH-570) was added to the system. Add 10-30% silicone acrylic latex to the acrylic latex paint, test its coatability on the surface of water-soluble acrylic latex paint, and use the grade system in Table 1 to compare the adhesion of the paint to the sealant.

[0072] The prepared silicone sealant was evenly coated in a 2mm deep mold and on the cured sealant without modifier added, and cured at room temperature for 2, 8, 24, and 48 hours, respectively, and then applied on it. Apply a mixture of water-soluble acrylic latex paint, silicone acrylic and oil-soluble acrylic enamel evenly. After 2 days, 7 days, 18 days and 25 days of curing, the coatability of the coating to the cured surface of the sealant was determined according to ASTM / D3359-83 (Test Method for Pressure Sensitive Tapes), and t...

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Abstract

The invention discloses mono-component surface modificability organosilicon sealing material and its manufacturing method and using. Its components parts by weight are as follows: polyorganosiloxane 100, filling 50-150, cross-linking curing agent 3-10, catalyst 0.05-1, and modifier 1-3. Its manufacturing includes the following steps: adding 1-3 part silane coupler as modifier to improve oil solubility paint painting; adding 1-3 part silane coupler methacrylic acid acyl propyl lumiflavin oxygen group silane, and adding proper silicon abicin emulsion in water solubility acrylic latex coating to improve its surface modificability. The formed product can be used as basecoat to save cost; and it is convenient for construction.

Description

technical field [0001] The present invention relates to a one-component surface-modifiable organosilicon sealing material and its preparation method and application. Background technique [0002] RTV silicone rubber is a common sealant with excellent high and low temperature resistance, aging resistance, UV resistance and other characteristics, and is widely used in the construction industry. However, silicone sealants have low surface energy and small surface tension, and generally do not infiltrate paints. Even with paint, the adhesion is very low and it peels off very easily. This greatly limits its development in the decoration industry. [0003] There have long been patents describing how to improve the coatability of silicone sealants. For example, U.S.P.3542.714 proposes to mix an organic solution containing rosin resin into ordinary silicon sealing materials, which can improve the coatability, but there is a problem of solvent pollution; Improve coatability, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C08L83/14
Inventor 郑强高传花林薇薇徐晓明陶小乐
Owner ZHEJIANG UNIV
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