公开(公告)号：DE2902255A1

公开(公告)日：1980-07-31

申请号：DE2902255

申请日：1979-01-20

Applicant: BASF AG

Inventor： HORACEK HEINRICH DR ,  NISSEN DIETMAR DIPL CHEM DR ,  HAARDT UDO ING GRAD ,  REICH ERHARDT DIPL CHEM DR

IPC: B29C44/04 ,  B32B5/32 ,  C08J9/34 ,  B32B27/40 ,  B29D27/00

Abstract: Composite foams, having a closed, compact outer skin of polyurethane integral foam on >=1 side of surface, consist of a polyurethane integral foam, (A), and of a non-polyurethane foam (B). The composite foams are prepd. by (i) introducing the foamable polyurethane integral foam mixt., in flowable condition, into a sealable mould, in quantities such that compression ratio achieved on foaming is 1.5-3, (ii) the non-polyurethane foam is laid so as to float on the still flowable polyurethane integral foam mixt.; (iii) the mould is closed and (iv) the polyurethane integral foam mixt. is left to foam. The outer skin of (A) has high tensile- and flexural strength. Properties such as bulk wt., compressive stress and combustibility, are determined by (B). Composite foam, contg. polyethylene foam as (B) and soft, elastic (A) are used as sports mats (claimed) and opt. as wall claddings for gymnasia. Polystyrene and rigid (A) foams can be used as wood substitutes, partitions and furniture parts. Rigid (A) and foamed phenoplast or aminoplast as (B), opt. with inorganic-, e.g. silicate-, foams, are used as building components requiring good heat-insulation and non-flammability.

公开(公告)号：DE2825569A1

公开(公告)日：1979-12-20

申请号：DE2825569

申请日：1978-06-10

Applicant: BASF AG

Inventor： HORACEK HEINRICH DIPL CHEM DR ,  SCHOEN ERNST DIPL CHEM DR ,  REICH ERHARDT DIPL CHEM DR ,  VOLKERT OTTO DIPL CHEM DR

IPC: C08G18/00 ,  C08G18/16 ,  C08G18/18 ,  C08G18/22 ,  C08G18/72 ,  C08G18/73 ,  C08G18/75 ,  C08G18/78 ,  C08G18/80 ,  C08G18/14

Abstract: To prepare light-stable polyurethane integral skin foams, especially soft integral foams, aliphatic and/or cycloaliphatic polyisocyanates, both categories preferably containing urethane groups and/or biuret groups, are reacted with polyols in the presence of blowing agents and of a synergistic catalyst combination comprising an alkali metal hydroxide, alkali metal alcoholate, alkali metal phenolate, alkali metal salt of a weak acid and/or hexahydrotriazine derivative and an organic tin, zinc and/or iron(II) compound, in the presence or absence of assistants and adjuvants. The preferred catalyst combination is tri-(dimethylaminopropyl)-s-hexahydrotriazine and dibutyl-tin dilaurate.