Aqueous impregnation bath for reinforcement fibres and uses thereof
US10323352B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2016 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Jun 25, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to an aqueous impregnation bath for reinforcement fibers for manufacturing prepregs having a thermoplastic matrix, resulting in highly satisfactory consolidation, in terms of residual porosity, of the composite material parts manufactured using the prepregs. The impregnation bath includes a least one thermoplastic polymer, a surfactant and water, and is characterized in that the surfactant is an ethoxylated stearyl alcohol of formula: HO—(CH2—CH2—O)n—CH2—(CH2)16—CH3 wherein n is 100. The invention also relates to a method for impregnating reinforcement fibers using the impregnation bath, to a method for manufacturing a prepreg having a thermoplastic matrix using the impregnation method, and to a method for manufacturing a part made of a composite material having a thermoplastic matrix using the method for manufacturing a prepreg. The invention is useful in any field for manufacturing parts made of composite materials and, specifically, in the aeronautical, space, rail, shipping and automotive industries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.