Oxymethylene polymer molding compositions having enhanced impact resistance and article molded therefrom
US4707525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1986 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Nov 14, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Articles molded from oxymethylene polymer molding compositions of the present invention exhibit enhanced impact strength properties, especially at low temperatures such as -20.degree. F. It has now been found that the impact strength of articles molded from oxymethylene polymer molding compositions may be improved when the compositions include an elastomeric polyurethane, which is the reaction product of: PA1 (i) 4,4'-methylenebis(phenyl isocyanate), PA1 (ii) polyoxytetramethylene glycol having a molecular weight within the range of about 1500 to about 3000, and PA1 (iii) at least one diol extender selected from the group consisting of aliphatic straight chain diols having from 2 to about 6 carbon atoms, bis(2-hydroxy-ethyl) ether of hydroquinone, and bis(2-hydroxy-ethyl) ether of resorcinol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.