NON-FORMALDEHYDE CONTAINING EMULSION POLYMER DISPERSED COMPOSITION, CONTAINING COMPLETELY HYDROLYSED POLYVINYL ALCOHOL, USED AS COLLOIDAL STABILISER FOR ENHANCING THERMAL STABILITY Russian patent published in 2012 - IPC C08F220/56 

FIELD: chemistry.

SUBSTANCE: disclosed is use of (meth)acrylic acid amide(s) as a comonomer (comonomers) (b), meant for enhancing thermal stability using non-formaldehyde containing aqueous dispersion of a polymer obtained via emulsion copolymerisation of at least the following components: (a) vinyl ester monomer (monomers) and (b) a comonomer (comonomers) containing said amide derivatives of acrylic and/or methacrylic acid, in the presence of at least (c) a completely hydrolysed polyvinyl alcohol (PVOH), the average degree of hydrolysis of which is more than 95.00 mol %, wherein polymerisation does not include comonomers which are amide derivatives of N-alkylol(meth)acrylic acid, and thermal stability of the adhesive compound which is measured in form of a WATT 91 value in accordance with DIN EN 14257 is higher than that of samples obtained without using amide derivatives (b) of acrylic and/or methacrylic acid. The invention also discloses a non-formaldehyde containing polymer dispersion and a method of preparing said dispersion using (meth)acrylic acid amides, as well as a binder composition containing said aqueous polymer dispersion.

EFFECT: possibility of obtaining water resistant and heat resistant wood glue which does not decolour wood when gluing.

44 cl, 8 tbl, 40 ex