Liquid (meth)acrylic composition comprising a multistage polymer and a (meth)acrylic monomer, its method of preparation and its use
AssigneeArkema France
InventorsRaber Inoubli, Philippe Hajji, Rosangela Pirri, Pierre Gerard
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Abstract
The present invention relates to a liquid (meth)acrylic composition comprising a (meth)acrylic monomer, a (meth)acrylic polymer and a multistage polymer. In particular the present invention it relates to liquid composition comprising a (meth)acrylic monomer, a (meth)acrylic polymer and a multistage polymer that can be used as a syrup and especially as a syrup for impregnation.
Claims14
An impregnation process for impregnating a fibrous substrate, wherein said fibrous substrate comprises fibres having an aspect ratio of at least 1000 and said process comprises a step of impregnating said fibrous substrate with a liquid composition comprising:
- a) a (meth)acrylic polymer (P1), having a mass average molecular weight Mw of less than 100,000 g/mol,
- b) a multistage polymer in the form of core shell particles having a multilayer structure comprising at least one layer (A) comprising a polymer (A1) having a glass transition temperature below 0° C. and another layer (B) comprising a polymer (B1) having a glass transition temperature over 30° C., said layer (A) is made in the first stage of a multistage process forming the core for the polymer particle having the multilayer structure and
- c) a (meth)acrylic monomer (M1) wherein the multistage polymer to monomer ratio by weight in the liquid composition is between 1/99 and 25/75.
Dependencies are inferred from the claim text.