Patent GB-573932-A (GB)
Title: Bonding of polymeric materials to the surface of articles
IPC: C09J175/00
Filed: 1942-08-07
Abstract: Active hydrogen containing polymeric materials are bonded to the surfaces of articles, e.g. fabrics, films, sheets, tubes, yarns &c. made of a different active hydrogen containing polymeric material by bringing the two polymeric materials together in the presence of a polyisocyanate or polyisothiocyanate or mixture thereof.  The bonding may be carried out by coating or spraying the article with a solution of the polyisocyanate in toluene, flashing off the toluene and applying the other polymeric material and bonding by heat and pressure. p  Alternatively a solution of the polyisocyanate in the other polymeric material may be sprayed on to the article.  Polymeric materials specified include hydroxylated organic materials, e.g. cellulose, starch, wood, cellulose esters and derivatives, regenerated cellulose; polyvinyl alcohols, esters, acetals and ketals; alkyd resins; phenol-aldehyde and aromatic amine aldehyde resin, polyester-amides; proteins, e.g. gelatin, casein, zein, leather; ether resins, e.g. as described in U.S.A.  Specification 2,060,175; synthetic rubbers as described in Specification 486,878, [Group V], and U.S.A.  Specifications 1,640,363, 1,915,808 and 1,988,448.  The reaction may be aided by the addition of catalysts, e.g. metallic driers.  In examples: (1) cellulose yarn is passed through a tank containing a solution of trioxane modified rubber and hexamethylene diisocyanate.  The yarn is dried and then vulcanised to rubber; (2) an aldehyde modified neoprene was used instead of the trioxane rubber; (4) an alkyd resin was bonded to regenerated cellulose sheet; (6) cellulose nitrate is similarly bonded to a sheet of regenerated cellulose (a) by means of decamethylene diisocyanate alone, (b) by means of the diisocyanate dissolved in polyvinyl butyral; (9) laminated board is obtained by uniting sheets of wood by means of a solution of a diisocyanate in partially hydrolysed polyvinyl acetate resin.  Specifications 547,672 and 550,925 also are referred to.ALSO:Films &c. of an active hydrogen containing polymeric material are bonded to the surfaces of articles, e.g. fabrics, films, sheets, tubes, yarns, &c. made of a different active hydrogen containing polymeric material by bringing the two polymeric materials together in the presence of a polyisocyanate or polyisothiocyanate or mixture thereof.  The bonding may be carried out by coating or spraying the article with a solution of the polyisocyanate in toluene, flashing off the toluene and applying the other polymeric material and bonding by heat and pressure.  Alternatively a solution of the polyisocyanate in the other polymeric material may be sprayed on to the article. Polymeric materials specified include hydroxylated organic materials, e.g. cellulose, starch, wood, cellulose esters and derivatives, regenerated cellulose; polyvinyl alcohols, esters, acetals and ketals; alkyd resins; phenolaldehyde and aromatic amine aldehyde resin, polyester-amides; proteins, e.g. gelatin, casein, yeni, leather; ether resins, e.g. as described in U.S.A. Specification 2,060,175; synthetic rubbers as described in Specification 486,878 and U.S.A. Specifications 1,640,363, 1,915,808 and 1,988,448.  The reaction may be aided by the addition of catalysts, e.g. metallic driers.  In examples: (1) cellulose yarn is passed through a tank containing a solution of trioxane modified rubber and hexamethylene di-isocyanate.  The yarn was dried and then vulcanised to rubber; (2) an aldehyde modified neoprene was used instead of the trioxane rubber. Specifications 547,672 and 550,925, [both in Group IV], also are referred to.