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Hydrous silane coupling agent-polyether grafted polysiloxane polymer coating

A technology of silane coupling agent and polysiloxane, which is applied in the field of coatings, can solve the problems of poor hardness, poor compatibility of inorganic interior and exterior wall coatings, easy cracking and falling off, etc., and achieve stable film formation, excellent film appearance and fixation effect Good results

Active Publication Date: 2013-10-23
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the inorganic interior and exterior wall coatings usually use inorganic silicate as the film-forming substance, and the inorganic silicate is usually quartz powder. The advantages of high temperature, aging resistance, rich sources of raw materials, no pollution, and low cost meet the requirements of contemporary building materials for energy saving and environmental protection. However, inorganic silicate has poor water resistance, adhesion, and flexibility after film formation, which leads to inorganic Interior and exterior wall coatings are not washable, have poor hardness, and are easy to crack and fall off, which limits the application of inorganic coatings in the field of interior and exterior walls
[0003] Polysiloxane has excellent flexibility, weather resistance, acid resistance, alkali resistance, water resistance and other comprehensive properties due to its long flexible -O-Si-O. The use of organic silicon modified inorganic interior and exterior wall coatings can effectively Improve the flexibility of coatings, but because silicone is a water-insoluble polymer, it has poor compatibility with inorganic interior and exterior wall coatings, and cannot achieve the expected modification effect

Method used

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Effect test

Embodiment 1

[0036] Embodiment 1: Preparation of aqueous silane coupling agent-polyether graft polysiloxane polymer coating

[0037] Add 100g of hydrogen-containing silicone oil (M n =2000g / mol), 80g polyether (M n =800g / mol) and 200g toluene, under stirring, blow nitrogen at 50°C for 30min, add 0.05gH 2 PtCl 6 , under the protection of nitrogen, the temperature was raised to 110°C for 5 hours to obtain a polyether-grafted polymethylsiloxane solution; 20 g of 3-(acryloyloxy)propoxypropyltrimethoxysilane was added dropwise within 1 hour, and continued After reacting for 6 hours, the aqueous silane coupling agent-polyether grafted polysiloxane polymer was obtained.

[0038] Get the potassium silicate aqueous solution 100g that modulus is 2.9, the aqueous silane coupling agent-polyether graft polysiloxane polymer 5g of above-mentioned preparation, water 50g, titanium dioxide 20g, ferric oxide 10g, calcium carbonate 30g, Silicon dioxide 20g, mineral oil defoamer (TEGO Foamex K3) 0.08g, acr...

Embodiment 2

[0039] Embodiment 2: Preparation of aqueous silane coupling agent-polyether graft polysiloxane polymer coating

[0040] Add 100g of hydrogen-containing silicone oil (M n =1000g / mol), 120g polyether (M n =500g / mol) and 350g of toluene, under stirring, purging with nitrogen for 30min at 80°C, adding 0.1gK 2 PtCl 4 , under the protection of nitrogen, the temperature was raised to 100°C for 8 hours to obtain a polyether-grafted polymethylsiloxane solution; 50 g of 3-(acryloyloxy)propoxypropyltrimethoxysilane was added dropwise within 2 hours, and continued After reacting for 8 hours, an aqueous silane coupling agent-polyether grafted polysiloxane polymer was obtained.

[0041] Take 100 g of sodium silicate aqueous solution with a modulus of 2.0, 50 g of the aqueous silane coupling agent-polyether graft polysiloxane polymer prepared above, 10 g of water, 40 g of titanium dioxide, 20 g of calcium carbonate, polysiloxane disinfectant Foaming agent (BYK066) 1g, acrylic acid sodium...

Embodiment 3

[0042] Embodiment 3: Preparation of aqueous silane coupling agent-polyether graft polysiloxane polymer coating

[0043] Add 100g of hydrogen-containing silicone oil (M n =5000g / mol), 100g polyether (M n =1500g / mol) and 200g cyclohexanone, under stirring, nitrogen purging at 90°C for 30min, adding 0.5gPt(CH 2 =CHPh) 2 Cl 2 , under the protection of nitrogen, the temperature was raised to 150°C for 3 hours to obtain a polyether-grafted polymethylsiloxane solution; 10 g of 3-(acryloyloxy)propoxypropyltrimethoxysilane was added dropwise within 0.5 hours, The reaction was continued for 3 hours to obtain a water-based silane coupling agent-polyether grafted polysiloxane polymer.

[0044] Take modulus 3.0 sodium silicate aqueous solution 20g, modulus 2.6 potassium silicate aqueous solution 80g, aqueous silane coupling agent-polyether grafted polysiloxane polymer 20g, water 100g, titanium dioxide 15g, oxidation 40g copper, 50g calcium carbonate, 10g silicon dioxide, 2g mineral oi...

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Abstract

The invention belongs to the field of coatings, and discloses a hydrous silane coupling agent-polyether grafted polysiloxane polymer coating. The hydrous silane coupling agent-polyether grafted polysiloxane polymer coating comprises the following components in parts by weight: 100 parts of inorganic silicate water solutions, 1-50 parts of hydrous silane coupling agent-polyether grafted polysiloxane polymers, 10-100 parts of water, 0-40 parts of titanium dioxide, 0-40 parts of pigments, 10-50 parts of calcium carbonate, 0-50 parts of silicon dioxide, 0.05-5 parts of defoaming agents, 0.05-5 parts of dispersing agents, 0.05-5 parts of wetting agents, 0.05-5 parts of thickening agents, 0.05-5 parts of anti-freeze agents and 0.1-10 parts of film-forming auxiliary agents. The hydrous silane coupling agent-polyether grafted polysiloxane polymer coating disclosed by the invention has the advantages of abrasion resistance, acid resistance, alkali resistance (without bubbles for 168 hours), easiness for construction, good fixation effect, film-forming stability, excellent film-forming appearance, and the like and is suitable for inner and outer walls.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an aqueous silane coupling agent-polyether grafted polysiloxane polymer coating. Background technique [0002] Inorganic coatings mainly refer to coatings prepared by using silicate and phosphate compounds as binders and adding various pigments, fillers, additives, and curing agents. According to the film-forming substances, it is mainly divided into inorganic silicate coatings, silica sol coatings, and phosphate coatings. Among them, the inorganic interior and exterior wall coatings usually use inorganic silicate as the film-forming substance, and the inorganic silicate is usually quartz powder. The advantages of high temperature, aging resistance, rich sources of raw materials, no pollution, and low cost meet the requirements of contemporary building materials for energy saving and environmental protection. However, inorganic silicate has poor water resistance, adhesion, and flexibilit...

Claims

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Application Information

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IPC IPC(8): C04B28/26C08G81/00
Inventor 刘伟区王政芳罗广建陈海生
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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