Non-stick polyorganosiloxane coating compositions
US4043977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Mar 25, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition for coating paper, films and fiber materials, comprising PA1 A. 4 parts by weight of a linear polyorganosiloxane with ends stopped by vinyl groups and having a viscosity of up to about 500 cP (20.degree. C) and PA1 B. about 0.5 to 1.5 parts by weight of a crosslinking agent containing Si-vinyl units and SiH units and comprising molecules with a maximum of about 10 Si atoms bonded to one another via oxygen, and wherein the two reactive groups are present in adjacent positions in one and the same molecule and the remaining valencies of the Si atom are saturated by methyl groups and the SiH groups are present in a ratio of about 1:1 to 2.5:1 to the total amount of all Si-vinyl units present in the composition, PA1 C. a platinum metal complex, the amount of metal being up to about 0.01 part by weight -- based on 100 parts by weight of total composition, and PA1 D. a diaziridine, the amount of diaziridine being about 75 to 250 times the weight of metal. The compositon has a viscosity of about 150 cP -- the increase of the initial viscosity over a period to of at least 24 hours being less than 1 cP -- easy application from existing equipment. The present invention relates t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.