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Name
BASF curing agent
Description
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aliphatic polyisocyanates for lightfast and weather-resistant two-pack polyurethane coatings |
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| nature | biurets of polyisocyanates based on hexamethylene diisocyanate | ||
| Range | |||
| Basonat® HB 100 | solvent-free | ||
| Basonat® HB 175 MP/X |
approx. 75 % solution in a 1:1 blend of 1-methoxy-2-propyl acetate and xylene |
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| Basonat® HB 275 B | approx. 75 % solution in n-butyl acetate | ||
| Basonat® HB 475 B/X |
approx. 75 % solution in a 1:1 blend of n-butyl acetate and xylene |
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| Properties | ||||||||||||||
| physical form | liquids | |||||||||||||
| shelf life |
According to our experience, Basonat® HB polyisocyanates can be stored for 6 months from the date of delivery if kept in tightly sealed original containers, protected from humidity at temperatures from 10 °C (50 °F) to 30 °C (86 °F). After re-filling from original containers, a shorter shelf life should be expected. |
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| typical properties (no supply specification) | ||||||||||||||
| Basonat® HB 100 |
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| Basonat® HB 175 MP/X |
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| EDC007305e,August2010 | Basonat® HB polyisocyanates | |||||||||||||
| Basonat® HB 275 B |
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| Basonat® HB 475B/X |
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| The NCO equivalent weight indicates the amount of Basonat®polyisocyanate as supplied containing 1 Mol of active NCO. | ||||||||||||||
| crosslinking | Basonat® HB polyisocyanates are used to crosslink most hydroxyacrylic resins, e. g., Joncryl® grades, and hydroxy polyesters. | |||||||||||||
| diluent tolerance | Basonat® HB polyisocyanates can be diluted with esters (e. g. butylacetate), ketones (e. g. methyl ethyl ketone), glycolether acetates(e. g. methoxypropyl acetate) or with aromatic hydrocarbons (e. g.Solvesso® 1 100, xylene). | |||||||||||||
| If Basonat® HB polyisocyanates are diluted to a polyisocyanatefraction of less than 40 %, turbidity, flocculation and/or sediment-ation may occur during storage. Storage trials should always becarried out. | ||||||||||||||
| Application | ||
| field of application | Basonat® HB polyisocyanates are used to formulate particularly lightfast and weather-resistant coatings. Aliphatic polyisocyanates are sometimes even used in primers for difficult substrates such as aluminum or various plastics, e. g., when composites are to be coated. | |
| Basonat® HB 100 is used to formulate coatings in which the sol-vents contained in the other Basonat® HB grades would provetroublesome (e. g., aromatic hydrocarbons excessively solubilizingpolystyrene). | ||
| processing |
The theoretical equivalent amount of polyisocyanate required for crosslinking is computed using this formula (example: Basonat® HB 100 and Joncryl® 922):
0.075*[OH value]*[non-volatile fraction of OH component] [NCO] |
| EDC 007305 e, August 2010 | Basonat® HB polyisocyanates | |||||||||
| example: | Joncryl® 922 | |||||||||
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| (0.075*140*80)/22.5=37.3 | ||||||||||
| Dosage rate for 100 g Joncryl® 922 as supplied: | ||||||||||
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| Solvents, pigments or extenders etc. used should be free from compounds containing active hydrogen groups, e. g., water, alcohols or amines. | ||||||||||
| A water content of less than 500 ppm in solvents and binders in two-component polyurethane lacquers is proven and tested. | ||||||||||
| Safety |
| Basonat ® HB polyisocyanates are reactive polyfunctional isocyanates containing traces of hexamethylene-1,6-diisocyanate, requiring adequate protection measures. Thus they may only be used in industrial or professional applications. They are not suitable for do-it-yourself applications. |
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When handling these products, please comply with the advice and information given in the safety data sheet and observe protective and workplace hygiene
measures adequate for handling chemicals
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| Note |
| The data contained in this publication are based on our current knowledge and experience. In view of the many factors that may affect processing and application of our product, these data do not relieve processors from carrying out their own investigations and tests; neither do these data imply any guarantee of certain proper- ties, nor the suitability of the product for a specific purpose. Any descriptions, drawings, photographs, data, proportions, weights, etc. given herein may change without prior information and do not constitute the agreed contractual quality of the product. The agreed contractual quality of the product results exclusively from the statements made in the product specification. It is the responsibility of the recipient of our product to ensure that any proprietary rights and existing laws and legislation are observed. |
| ® = registered trademark, ™ = trademark of the BASF Group, unless otherwise noted |
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