公开(公告)号：DE19643056A1

公开(公告)日：1998-04-23

申请号：DE19643056

申请日：1996-10-18

Applicant: BASF AG

Inventor： NABER BERNHARD ,  GASSAN MICHAEL ,  HENDREICH REGINA ,  NEIS VERA

IPC: C08G18/48 ,  C08G18/66 ,  C08G18/83 ,  C08J11/22 ,  C08L75/04 ,  C08J11/10 ,  C08J9/24

Abstract: A method for the preparation of tough elastic polyurethane integral foams with improved tear strength, extension at break and tensile strength, comprises reacting optionally modified organic polyisocyanates (A) with at least one high mol.wt. compound (B) containing two or more reactive hydrogen atoms and optionally with low mol.wt. chain extenders and/or cross-linking agents (C), in the presence of catalysts (D), optional propellants (E) and optional auxiliary agents and/or additives (F). At least one recycled polyol obtained by glycolysis of tough elastic polyurethane integral foam using glycidyl ethers is used as (B). Also claimed are tough elastic polyurethane integral foams prepared by the above method.

公开(公告)号：DE19643057A1

公开(公告)日：1998-04-23

申请号：DE19643057

申请日：1996-10-18

Applicant: BASF AG

Inventor： NABER BERNHARD ,  CALGUA ERWIN ,  GASSAN MICHAEL ,  NEIS VERA

IPC: C08G18/40 ,  C08G18/50 ,  C08G18/79 ,  C08G18/83 ,  C08J9/14 ,  C08J11/24 ,  C08G18/65 ,  C08G18/32 ,  C08J9/08 ,  C08L75/04 ,  F16L59/00

Abstract: A method for the preparation of polyisocyanurate foams with reduced thermal conductivity, comprises reacting optionally modified organic polyisocyanates (A) with at least one high mol.wt. compound (B) containing two or more reactive hydrogen atoms and optionally with low mol.wt. chain extenders and/or cross-linking agents (C), in the presence of catalysts (D), optional propellants (E) and optional auxiliary agents and/or additives (F). At least one recycled polyol obtained by glycolysis of polyisocyanurate foam using carrier polyols with a maximum OH content of 500 mg KOH/g and molar mass of at least 450 g/mole, is used as (B). Also claimed are polyisocyanurate foams prepared by the above method.

公开(公告)号：DE19525301A1

公开(公告)日：1997-01-16

申请号：DE19525301

申请日：1995-07-12

Applicant: BASF AG

Inventor： NABER BERNHARD ,  NEIS VERA ,  GASSAN MICHAEL ,  LEZIUS MARITTA

IPC: C08G18/65 ,  C08G18/50 ,  C08G18/79 ,  C08J11/24 ,  C08L75/00 ,  C08L75/04 ,  C08G18/38

Abstract: The prodn. of isocyanurate gp.-contg. polyols (I) comprises reacting polyisocyanurates (II) with short-chain, OH gp.-contg. cpds. (III) in presence of carrier polyols (IV) with an OH number of not more than 500 mg KOH/g and a mol. wt. of at least 450. Also claimed are polyols (I) obtd. by this process. Pref. polyols (IV) are based on glycerol and/or trimethylolpropane. The ratio of (III):(IV) = (5-20):1, and the ratio of (III + IV):(II) = (1-5):1. The process comprises heating the mixt. of (III) and (IV) to 190-240 degrees C, adding (II), reducing the temp. by 10-40 degrees C and stirring for 1.5-3 hrs. at this temp. After reaction is complete, the mixt. is either (a) cooled to 50-150 degrees C, treated with not more than 5 wt% alkali or alkaline earth metal hydroxide and stirred for 0.5-1.5 hrs. at this temp. or (b) cooled to 100-160 degrees C, treated with not more than 10 wt% monofunctional glycidyl ether and stirred for 0.5-1.5 hrs. at this temp.