KR870008935A - Chemically Modified Methods of Polyurethane Materials, Chemically Modified Polyurethane Materials, Applications of Modified Methods and Uses of Modified Polyurethane Materials - Google Patents

Abstract

No content

Description

Chemically Modified Methods of Polyurethane Materials, Chemically Modified Polyurethane Materials, Applications of Modified Methods and Uses of Modified Polyurethane Materials

Since this is an open matter, no full text was included.

Claims (11)

A method of chemically modifying the surface of a polyurethane material containing free NCO groups to provide permanent reactivity to materials containing NCO groups in these materials, wherein after molding the polyurethane material, before curing, And the surface is treated with a steam-air mixture having a relative humidity sufficient to convert free NCO groups in the surface of this material. A method of chemically modifying the surface of a polyurethane material containing free NCO groups to provide permanent reactivity to materials containing NCO groups in these materials, wherein the surface of the material is formed before it is cured after molding. Is treated with a substance comprising at least one additional hydrogen activator per molecule at a concentration which converts a hydrogen active group reactive to an isocyanate group, an alkoxysilane group, or a free NCO group in the surface layer of the substance. The method of claim 1, wherein the surface of the polyurethane material is contacted with a scheme-air mixture having a relative humidity of at least 50%, suitably at least 70%. The method of claim 2, wherein the hydrogen activating group is a hydroxyl, sadhydryl, carboxyl, primary amine and / or secondary amine group. 5. A process according to claim 4, wherein the material is used in solution or in the form of medium groups and the other components which may be present are inert to this soocyanate group. The process of claim 2 wherein the material used is thioalkyl, aminoalkyl or hydroxyalkyl trialkoxy silane. Polyurethane material having a chemically modified surface layer prepared by the method of at least one of claims 1-6. Use of the method according to one or more of claims 1 to 6 for increasing the adhesion of the bonding material and sealing material having free NCO groups on the surface of the surface modified polyurethane material. Use of the polyurethane material of claim 7 as a base layer for a urethane prepolymer material having free NCO groups, wherein the free NCO groups are bonded to this base layer. A base layer for bonding and sealing a material derived from a urethane prepolymer having a free NCO group (the free NCO group is applied to the surface of the material of the base layer to bond and seal the vehicle window of the vehicle body), Use of the polyurethane material described in claim 7. Use of the polyurethane material according to claim 7 as a base layer for automotive spare glass windows. ※ Note: The disclosure is based on the initial application.