摘要:
Thermoset resinous molding compositions are provided by essentially instantaneously combining and reacting three basic resin forming components. The latter include an oligomeric ester or polyester containing polymerizable unsaturation and free hydroxyl group(s); a polyisocyanate; and an aromatic polyamine. The indicated thermosetting resin systems are especially adapted for use in a reaction injection molding (RIM) operation.
摘要:
Disclosed is a storage stable blend of a long chain polyol and a short chain diol wherein the diol is present in an amount whereby the diol and polyol form an incompatible blend. The blend is rendered storage stable by the addition of a compatibilizing amount of a urethane.
摘要:
The disclosure is directed to thermoset resinous compositions having utility in the area of surface coating and molding applications, the latter including the preparation of high performance composites and the use in reaction injection molding processes. The contemplated compositions are obtained by polymerizing a reaction mixture comprising a polyfunctional 2-oxazoline compound, a compound or oligomer containing a plurality of aromatic hydroxyl groups and a polyfunctional epoxide.
摘要:
Disclosed is a process for the catalyzed reaction of an isocyanate and an active hydrogen compound wherein the reaction is conducted in the presence of a novel catalyst comprising the salt of 1,8-diazobicyclo(5.4.0)undec-7-ene and 1,4-benzoquinone. Preferred catalyzed reaction mixtures comprise Reaction Injection Molding urethanes (RIM). The novel catalyst salts provide a controlled induction period prior to the onset of gelation of the reaction mixture while providing complete cure of the reaction mixture thereafter.
摘要:
The present invention is directed to an isocyanate-functional composition useful for forming a coating, adhesive, elastomer, or like article. Cure of the composition preferably involves trimerization of the isocyanate groups in the presence of an amino catalyst including a tertiary amine, an amine salt, and quaternary ammonium salts. The novel catalyst system used in achieving cure of the isocyanate-functional compound-containing liquid curable composition comprises an amino catalyst and an ortho-carboxylic acid ester.
摘要:
Disclosed is a storage stable blend of a long chain polyol and a short chain glycol wherein the glycol is present in an amount whereby the glycol and polyol form an incompatible blend. The blend is rendered storage stable by the addition of a compatibilizing amount of a salt wherein the salt is formed from a metal having a charge density of from about 1.25 to about 1.45.
摘要:
Polyurethane molding compositions characterized in providing tough, high temperature resistant cross-linked products during the in-mold curing cycle thereby obviating the need for post curing in order to obtain potentially optimum physical strength properties.
摘要:
The present invention is based on the unexpected discovery that the low profile additives (LPA) disclosed in U.S. Pat. No. 5,116,917 provide effective shrinkage control when used with various blends of vinyl ester and polyester resin systems. This LPA is unique in that its low profile efficiency is not affected by the different reactivities displayed by blends of vinyl ester resin and polyester resin at different blend ratios. This LPA is equally effective in formulations of all vinyl ester resin, all polyester resin, or any combination of such two resins. The present invention, then, is directed to a thermosettable resinous composition of between about 0 and 95 wt-% of a thermosettable vinyl ester resin; between about 5 and 100 wt-% of a thermosettable polyester resin; and between about 5 and 40 wt-% of a low profile additive comprising a non-gelling, saturated polyester formed from dibasic acid and an EO/PO block copolymer having an EO/PO molar ratio ranging from about 0.1 to 0.9, said polyester having an acid value of greater than about 10. The EO/PO polyether polyol can be built on a combination of diol, triol or other compound with active hydrogen groups, so long as the LPA product does not gel.
摘要:
The present invention is directed to a thermosettable vinul ester resinous composition and low profile additive. The improvement comprises the low profile additive comprising a non-gelling, saturated polyester formed from dibasic acid and an ethylene oxide/propylene oxide polyether polyol having an EO/PO molar ratio ranging from about 0.1 to 0.9. The polyester has an acid value of greater than about 10 and preferably has a molecular weight of greater than about 6,000. The EO/PO polyether polyol can be built on a combination of diol, triol or other compound with active hydrogen groups, so long as the LPA product does not gel.
摘要翻译:本发明涉及一种可热固化的戊烯酯树脂组合物和低调添加剂。 该改进包括由二元酸形成的非胶凝的饱和聚酯和EO / PO摩尔比范围为约0.1至0.9的环氧乙烷/环氧丙烷聚醚多元醇的低分子添加剂。 聚酯的酸值大于约10,优选具有大于约6,000的分子量。 EO / PO聚醚多元醇可以二醇,三醇或其它化合物与活性氢基团的组合构成,只要LPA产物不凝胶即可。
摘要:
Disclosed is a storage stable blend of a long chain polyol and a short chain diol wherein the diol is present in an amount whereby the diol and polyol form an incompatible blend. The blend is rendered storage stable by the addition of a compatibilizing amount of a phenol.