Sanyo Chemical Industries, Ltd.

Hajime Akiyama

Tsuyoshi Tomosada

Kunikiyo Yoshio

Yuichi Sasatani

Yasushi Kumagai

Motonao Kaku

Jiro Ryugo

Toru Nakanishi

Shunji Matsunaga

Takashi Takemoto

Tatsuroh Yanagi

Sadao Kubota

Yoshio Taguchi

Mitsuo Koseki

A polyurethane foam which is obtained by reacting an addition-polymerizable active hydrogen component comprising a compound having a group containing active hydrogen and an addition-polymerizable functional group or comprising both this compound and a compound containing at least 2.5 groups (on the average) containing active hydrogen and not containing addition-polymerizable functional groups with an organic polyisocyanate in the presence or absence of at least one auxiliary selected from the group consisting of foaming agents and additives to polymerize the addition-polymerizable functional group and simultaneously form a polyurethane, and which has a structure in which the chains formed by the addition polymerization have been cross-linked to the polyurethane chains. The polyurethane foam is useful as a rigid polyurethane foam excellent in hardness, dimensional stability, etc. and usable as a heat insulator, shock-absorbing material, synthetic wood, etc., or is useful as a soft polyurethane foam reduced in compression set and usable as a cushioning material, shock-absorbing material, sound insulating/absorbing material, etc.

Polyurethane foam, process for producing the same, and foam forming composition

Coating compositions, comprising (I) blocked urethane prepolymers, particularly those derived from tetramethyl-xylylene diisocyanate, and (II) curatives, such as polyether polyamines, oxyalkylene ethers of polyamines and ketimines of polyamine, are disclosed. Plastisol compositions, which comprise vinyl chloride polymers, plasticizers, and adhesion promoters, comprising (I) a blocked polyisocyanate, such blocked urethane prepolymers as above, or isocyanurate or biuret-containing blocked polyisocyanate, and (II) active amino group-containing mono- or poly-amide compounds, are also disclosed. These compositions are useful for coating metal surface to improve resistance to chipping.

Coating composition and plastisol composition, and articles coated

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Kyoto, Japan

Hajime Akiyama