Daicel Chemical Industries, Ltd.

Shoji Watanabe

Takuya Miho

Kiyoshi Okitsu

Kimio Inoue

Tomohisa Isobe

Takaaki Murai

Yoshiyuki Ikemoto

Naoki Nakashima

Akira Yamamoto

Hajime Namikoshi

Takaaki Fujiwa

Yoshiyuki Harano

Michio Nakanishi

Toyokazu Yagii

Tatsumi Fujii

Masahiro Asami

Shin Takemoto

Masatoshi Mikumo

Yoshiaki Okumura

Susumu Funato

Yosuke Sagami

Disclosed are a composition and a process for preparation thereof, which composition comprises a novel alicyclic compound and an epoxidized compound thereof represented respectively by formulae (I) and (II) ##STR1## wherein Y.sup.1 represents at least one of the structural groups ##STR2## Y.sup.2 represents at least one of the the structural groups ##STR3## R.sup.a and R.sup.b each represent hydrogen or a methyl group, m represents a natural number of from 1 to 7, and n represents a natural number of from 1 to 20. The composition (II) is a multi-functional alicyclic epoxidized compound, which has a property of being high in epoxy group density in a molecule compared with alicyclic conventional epoxy resins, which can provide resins having wide range properties from being hard to being soft.

Composition comprising novel alicyclic compound, process for preparation

.epsilon.-caprolactone-modified hydroxyalkyl acrylate or methyacrylate can be effectively produced from .epsilon.-caprolactone and a hydroxyalkyl acrylate or methacrylate in the presence of a stannous halide as a catalyst. The obtained monomer is used together with another copolymerizable monomer to produce a copolymer which is suitable for coating and photocurable composition.

Process for producing epsilon-caprolactone-modified hydroxyalkyl

A process for producing a lactone polymer which comprises reacting an ester compound synthesized from an alcohol and an acid or acid anhydride thereof with a lactone and a ring-opening polymerization initiator without being accompanied by condensation. The thus produced lactone polymer is effective for preventing shrinkage of thermosetting resins, particularly unsaturated polyester resins.

Process for producing lactone polymer and an anti-shrinking

A resin composition is suitable to seal an electronic device, when cured, and comprises:

Resin composition to seal electronic device

A polyether compound having ether groups and vinyl double bonds represented by formula (I) ##STR1## wherein R.sub.1 represents a residue of an organic compound having l active hydrogen atoms, n.sub.1 through n.sub.l each represents 0 or an integer of from 1 to 100, the sum of the integers represented by n.sub.1 through n.sub.l is from 1 to 100, and

Polyether compounds, epoxy resins, epoxy resin compositions, and

A process for preparing a graft polymer by subjecting a cyclic ester to ring-opening polymerization in the presence of a cellulose derivative in the presence of a ring-opening polymerization catalyst for the cyclic ester. The resulting graft polymer has high transparency, good film-formability and high solubility and can be suitably used as a novel polymer material.

Process for preparing novel graft polymer

A radiation-curable resin composition is disclosed. It comprises 0.1 to 10 parts by weight of a photosensitizer added to 100 parts by weight of a mixture of 40 to 95 wt % of a resin having a molecular weight of at least 300 and at least one ethylenically unsaturated group in the molecule and 60 to 5 wt % of .epsilon.-caprolactone modified 2-hydroxyethyl acrylate or methacrylate of the formula: ##STR1## wherein R=H or CH.sub.3 and

Radiation-curable resin composition

An epoxy resin having hydroxyl groups is modified with .epsilon.-caprolactone by effecting the ring opening polymerization of .epsilon.-caprolactone onto the hydroxyl groups contained in the epoxy resin. The modified epoxy resin is further combined with a polycarboxylic anhydride and a promotor for curing, or polyamine to give a curable composition. The modified epoxy resin is further modified by reacting the epoxy groups therein with a primary or secondary amine. Both the modified resin and the compositions are useful as coating.

Modified epoxy resin and composition

A polyurethane comprises (a) organic diisocyanate units and (b) polycaprolactone polyol units having a narrow molecular weight distribution in which a ratio of the weight average molecular weight to the number average molecular weight is in the range of from 1.1 to 2.0 and the average molecular weight is 500 to 5,000, the units (a) and (b) being connected linearly through urethane linkages.

Polyurethane

A polyurethane having excellent elastic recovery is obtained by reacting an organic diisocyanate with a polycaprolactone polyester-diol prepared from a dihydric alcohol, a dibasic acid, an ester thereof or an anhydride thereof and .epsilon.-caprolactone or/and hydroxycaproic acid and having a hydroxyl value of 35 to 150 KOH mg/g and a content of .epsilon.-caprolactone and hydroxycaproic acid of 69 to 95% by weight.

Polyurethane having excellent elastic recovery and elastic filament of

A polyol resin is disclosed which is obtained by reacting 95 to 40% by weight of an aromatic vinyl monomer-allyl alcohol copolymer with 5 to 60% by weight of .epsilon.-caprolactone or .epsilon.-hydroxycaproic acid. The polyol resin can be reacted with a crosslinking agent to form a coating film.

Polyol resin

New thermoplastic polyester resins having a low melting point which are useful as a molding material, especially as an orthopedic cast material; said resin having the formula (I):

Thermoplastic polyester resin, production of same, and orthopedic cast

A lactone polymer has a narrow molecular weight distribution where a ratio of the weight average molecular weight to the number average molecular weight is in the range of from 1.1 to 2.0 and the molecular weight is 500 to 5,000.

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Ohtake, Japan

Shoji Watanabe