Bicomponent oily polyurethane primer with low VOC (volatile organic compounds)

An oil-based polyurethane, two-component technology, applied in the field of coatings, can solve the problems that oil-based paints cannot be completely replaced, water-based wood paints are immature, etc., and achieve the effects of improved construction and storage stability, suitable construction viscosity, and excellent solubility

Active Publication Date: 2011-10-19
东莞大宝化工制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China's wood coating decoration and furniture industry, there are no low-VOC solvent-based PU coating products. Low-VOC paint factories mainly use latex paint and water-based wood paint. However, water-based wood paint is immature in the domestic market, and its construction, hardness and other bottlenecks Has not yet broken through, so it still cannot completely replace oil-based paint
The market volume is less than 1% of solvent-based wood lacquer, and the mainstream of the furniture and home improvement market is still solvent-based wood lacquer products, and low-VOC solvent-based PU products are rarely launched in the market

Method used

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  • Bicomponent oily polyurethane primer with low VOC (volatile organic compounds)
  • Bicomponent oily polyurethane primer with low VOC (volatile organic compounds)
  • Bicomponent oily polyurethane primer with low VOC (volatile organic compounds)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A two-component low-VOC oily polyurethane primer, characterized in that it comprises component A, component B and diluent, and the ratio of parts by weight of component A to component B is 2:1;

[0047] Wherein, the first component includes the following raw materials calculated by weight percentage:

[0048] High solid polyol resin 67.2%, ketone solvent 6%, dispersant 1%, grinding powder 4%, talcum powder 20%, defoamer 0.65%, leveling agent 0.15%, anti-settling agent 1%; The solid content of component A is 76%.

[0049] The B component has a solid content of 48%, and includes the following raw materials calculated by weight percentage: 50% of toluene diisocyanate trimer, 30% of toluene diisocyanate adduct, and 20% of solvent.

[0050] Described diluent comprises following raw material calculated by weight percentage:

[0051] Ethyl acetate (EAC) 10%, n-butyl acetate (BAC) 85%, propylene glycol monomethyl ether propionate (PMP) 5%.

[0052] The method for preparing t...

Embodiment 2

[0061] A two-component low-VOC oily polyurethane primer, characterized in that it comprises component A, component B and diluent, and the ratio of parts by weight of component A to component B is 2:1;

[0062] Wherein, the first component includes the following raw materials calculated by weight percentage:

[0063] High solid polyol resin 75%, ketone solvent 5%, dispersant 0.5%, grinding powder 2.8%, talcum powder 16%, defoamer 0.35%, leveling agent 0.05%, anti-settling agent 0.3%; The solid content of component A is 78%.

[0064] The B component has a solid content of 50%, and includes the following raw materials calculated by weight percentage: 60% of toluene diisocyanate trimer, 20% of toluene diisocyanate adduct, and 20% of solvent.

[0065] Described diluent comprises following raw material calculated by weight percentage:

[0066] Ethyl acetate (EAC) 20%, n-butyl acetate (BAC) 70%, propylene glycol monomethyl ether propionate (PMP) 10%.

[0067] The method for prepar...

Embodiment 3

[0076] A two-component low-VOC oily polyurethane primer, characterized in that it comprises component A, component B and diluent, and the ratio of parts by weight of component A to component B is 2:1;

[0077] Wherein, the first component includes the following raw materials calculated by weight percentage:

[0078] High solid polyol resin 75%, ketone solvent 3%, dispersant 1%, grinding powder 2%, talcum powder 18%, defoamer 0.5%, leveling agent 0.1%, anti-settling agent 0.4%; The solid content of A component is 80%.

[0079] The B component has a solid content of 52%, and includes the following raw materials calculated by weight percentage: 65% of toluene diisocyanate trimer, 25% of toluene diisocyanate adduct, and 10% of solvent.

[0080] Described diluent comprises following raw material calculated by weight percentage:

[0081] Ethyl acetate (EAC) 15%, n-butyl acetate (BAC) 77%, propylene glycol monomethyl ether propionate (PMP) 8%.

[0082] The method for preparing the...

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Abstract

The invention relates to the technical field of coatings, in particular to a bicomponent oily polyurethane primer with low VOC (Volatile Organic Compounds) and a preparation method thereof. The primer comprises a component A, a component B and a diluting agent, wherein the ratio in parts by weight of the component A to the component B is 2:1, wherein the component A comprises polyhydric alcohol resin with high solid content, an ester solvent, a dispersing agent, a matting powder, a defoaming agent and an anti-sediment agent; according to the preparation method, different molecular weights of the polyhydric alcohol resin in the component A and the polyisocyanates in the component B are respectively screened, the optimal molecular weight is intercepted so as to ensure the dissolubility of the polyhydric alcohol resin and the polyisocyanates in a ketone solvent, meanwhile, other auxiliaries are used for carrying out stem grafting improvement on a molecular structure to enhance the miscibility of the two components; and therefore, the bicomponent oily polyurethane primer not only has the characteristics of good application property, good water resisting property, high hardness and thelike owned by the traditional polyurethane paint, but also ensures that the content of the volatile organic compounds is greatly reduced and even is lower than 450g / L.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a two-component low-VOC oily polyurethane primer. Background technique [0002] Wood coatings refer to coatings used on equipment made of solid wood boards, wood grain panels, glue boards, chipboards, fiberboards, etc., including paints for furniture, floors, stationery, musical instruments, and building decoration materials. Roughly divided into two categories, one is used in furniture factories, and the other is used in interior decoration. Foreign countries attribute it to decorative coatings. In my country, wood coatings account for about 15% to 20% of the total coatings. Furniture manufacturing is an ancient industry, and furniture coating can reflect a country's coating industry level to a large extent. From the use of phenolic varnish, alkyd varnish, and nitro varnish in the 1950s; to the end of the 1960s, polyurethane coatings began to be used in furniture, which improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D7/12
Inventor 陈贺生
Owner 东莞大宝化工制品有限公司
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