Aqueous water repellent for substrate treatment, making method, preparation of modified plywood or modified laminated veneer lumber, and preparation of wooden fiberboard
US6916507B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 20, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Aug 4, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31989
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous water repellent useful in the treatment of substrates of lignocellulose-origin materials or the like is characterized by comprising the product of co-hydrolytic condensation of (A) 100 parts by weight of an organosilicon compound having the formula:(R1)a(OR2)bSiO(4-a-b)/2 (1)wherein R1 is alkyl, R2 is alkyl, 0.75≦a≦1.5, 0.2≦b≦3 and 0.9<a+b≦4, and (B) 0.5-49 parts by weight of an amino-containing alkoxysilane having the formula:R3R4NR5—SiR6n(OR2)3-n (2)wherein R3 and R4 are H or alkyl or aminoalkyl, R5 is a divalent hydrocarbon group, R6 is alkyl, and n is 0 or 1, or a partial hydrolyzate thereof in the presence of an organic acid or inorganic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.