TH3741A - Resins for silencing components, processes for preparing resins and resulting silks. - Google Patents

Abstract

The invention involved a product to be inserted into a silicate component for mineral fibers. The process for the preparation of such products And syising components prepared from this product by the addition of urea and other additives. This product is obtained by condensation of phenol. Formaldehyde and urea when a base catalyst is present. And characterize with a liquid state Free phenol content that is less than 0.5% and formaldehyde content that is less than 3% of the total weight of the liquid. And the capacity for dilution is at least 1,000% measured at 20C.

Claims (4)

1.Products of phenol condensation Formaldehyde and urea When there is a base catalist Showing the characteristics that it is a liquid and has a lower amount of free phenol 0.5% The content of free formaldehyde is less than 3% expressed by weight compared to the total weight of the liquid. And has the ability to be diluted to at least 1,000% when Novak 20 H. 2. Products according to claim 1 that feature that it has less than 0.4% free phenol content. Free formaldehyde is less than 0.3% and the ability to be diluted to at least 2,000% at 20H3. Condensed product according to one of the claims of claim 1 or 2. 4. The process for the preparation of condensation based on one of the claims 1 to 3 demonstrates that the phenol content of the extract is at least 40%. And formaldehyde will react when the base catalyst is present. The ideal temperature is about 60 C and 75 C. The molar F / P ratio is between 3 and 6 until the rate of change. Convert more than 98% phenol, then start to cool the reaction mixture and add urea to the quantity that the molar ratio U / P is within the range from (chemical formula) to (chemical formula). Ideally, it is from (chemical formula) to (chemical formula) 5. Process according to claim 4 that characterizes urea to be added as soon as cooling has begun. 6. Process according to one claim. Clause 4 or 5 indicates that the reaction of phenol with formaldehyde takes place when the hydroxyl equivalent is from 12 to 20 mol. It is approximately 14 moles per 100 moles of the initial phenol. 7. Process according to claim 6, which characterizes that the catalist is a sidem hydroxide used in amounts 5 to 8.5. % By weight of the initial phenol 8. Process according to one of the claims 4 to 7, the characteristic that the reaction medium is cooled to approximately 35C at a rate of 1 C per minute 9. . Procedures following one of claims 4 through 8 that characterize urea to be added during a period equal to at least half the time required. Requirements for cooling the reaction medium 1 0. Process according to one of Claims 4 through 9 that characterizes that the process follows the temperature cycle that consists of the heating phase. The temperature-retention phase and the cooling-down phase are not greater than 90 minutes. 1. Syringe components made from condensation products of phenol, formaldehyde and urea. To be used for sizing glass fibers with additional additives, xyxing and urea at Show the characteristic that the condensed product is a product of claim 1 to 3 1. 2. Syising component according to claim 11, which characterizes that the proportion of the condensed product calculated as part of the dry matter and that of the additional urea. It is within the range from 65 parts of the condensed product for 35 parts of the additional urea to 90 parts of the condensed product for 10 parts of the additional urea. Ideally, it is 80 of urea 1 supplement. 3. The use of the silencing component according to claim 11 or 12 for covering and bonding mineral fibers, especially for insulating products 1. 4. Use according to claim 13, where the silencing component is sprayed onto the fibers.