摘要:
Highly-functionalized, low-viscosity polyether polyols are obtained by dehydration condensation reaction of alcohols.The polyether polyols are obtained by dehydration condensation of glycerin and monohydric and/or dihydric alcohol with the glycerin percentage being more than 50 mol % relative to 100 mol % of the total of the glycerin and alcohol. The glycerin may be crude glycerin obtained by hydrolysis or alcoholysis of natural fat and oils.
摘要:
Polyester polyol compositions have a low viscosity and are suited for the production of rigid polyurethane foams. Compositions for rigid polyurethane foams contain the polyester polyol compositions. Rigid polyurethane foams are produced therefrom.A polyester polyol composition is obtained by: a step (I) in which a dibasic acid compound (A) is reacted with a trihydric or higher polyhydric alcohol (a compound (B)); and a step (II) in which the reaction mixture from the step (I) is reacted with a hydroxycarboxylic acid compound (C); at least one compound (C) being a compound (C′) selected from the group consisting of ricinoleic acid compounds and 12-hydroxystearic acid compounds; the polyester polyol composition having a hydroxyl value in the range of 250 to 550 mg KOH/g and an average functionality of 3 to 8.
摘要:
Highly-functionalized, low-viscosity polyether polyols are obtained by dehydration condensation reaction of alcohols.The polyether polyols are obtained by dehydration condensation of glycerin and monohydric and/or dihydric alcohol with the glycerin percentage being more than 50 mol % relative to 100 mol % of the total of the glycerin and alcohol. The glycerin may be crude glycerin obtained by hydrolysis or alcoholysis of natural fat and oils.
摘要:
When the recording is started, recording information for information data is saved. When the supply of power has been recovered, the NWA and the LBN at the title head are reproduced based on the recording information. When RDI is present in a VOBU, and when a sequence code is not present in the VOBU, the reading of the first sector of the succeeding VOBU is repeated. When RDI is not present in a VOBU, or when a sequence code is present in the VOBU, the RTR_VMGI is created, the number of recorded titles that are saved is compared with the number of titles obtained when the supply of power has been recovered. Until there are no more following titles, reproduction of the LBNs at the title head is repeated. And when there are no more following titles, the RTR_VMGI is written to the optical disk.
摘要:
A flexible polyurethane foam produced by contacting the polyol composition (A) comprising a polyether polyol (an amine value: 400 to 600 mg KOH/g, a hydroxyl value: 350 to 700 mg KOH/g), which is the adduct of an alkylene oxide to a compound selected from following formulas (1) and (2), with an organic polyisocyanate in the presence of water wherein R1 and R2 represent H or (CH)n—NH2 (n: 1-3), R3-R6 and R7 represent H or an alkyl group or alkenyl group having 1 to 4 carbon atoms, and k and m represent 1 to 6. The flexible polyurethane foam exhibits sufficient physical properties and reduced volatile amine components. The flexible polyurethane foam can be used to provide excellent seat pads and sound absorbing materials for automobiles.
摘要:
A discharge device for worked material is provided. The worked material produced by the press working is received on a chute arranged just below a lower die. The chute is driven to make a reciprocating motion within a substantially horizontal plane in response to a die stroke. At a moment of stopping of the forward movement of the chute, an inertia force acting on the worked material from the chute is greater than a static frictional force. Or otherwise, a force taking effect upon starting of a backward movement of the chute is greater than the static frictional force. Consequently, the worked material is due to be discharged from the chute.
摘要:
An automatic insertion bookmark 10 designed to allow a bookmark portion 14 to be automatically inserted into and placed on an opened page 20a of a book 16. The bookmark 10 includes a fixing portion 12, a connecting portion 13, and a bookmark portion 14. The fixing portion 12 is either prefixed to one of the following or fixed thereto when the bookmark 10 is used: a back cover 18 of the book 16; a front cover 20 of the book 16; and, a leaf 19 of the book 16 in the immediate vicinity of either the back cover 18 or the front cover 20. A proximal end of the connecting portion 13 is connected to an upper portion of the fixing portion 12. Further, the bookmark portion 14 is connected to a distal end of the connecting portion 13. When the bookmark 10 is used, the bookmark portion 14 is folded downward at a portion where the bookmark portion 14 and the connecting portion 13 are joined together. As a result, the bookmark portion 14 is directed downward in an opposed relationship to the fixing portion 12.
摘要:
The present invention relates to a preparation for a polyurethane foam and a polymer polyol preparation for a polyurethane foam, each of which exhibits high coloration and discoloration inhibition properties over a long period of time when stored, and to a composition for a polyurethane foam, which is excellent in storage stability and is preferable as a resin premix. The composition for a polyurethane foam of the present invention is characterized by comprising (i) at least one polyol selected from a polyoxyalkylene polyol and a polymer polyol wherein polymer fine particles obtained by polymerizing a compound having an unsaturated bond are dispersed in the polyoxyalkylene polyol, (ii) a compound having a P═N bond, (iii) an antioxidant having a hydroxyphenyl group, (iv) at least one acid selected from the group consisting of an acyclic aliphatic monocarboxylic acid of 2 to 25 carbon atoms, a hydroxycarboxylic acid of 2 to 25 carbon atoms, a polycarboxylic acid of 20 to 60 carbon atoms, a specific aromatic monocarboxylic acid, a sulfonic acid and an acid having a sulfuric acid ester group, or its salt, (v) a catalyst for polyurethane foam production and (vi) a blowing agent.
摘要:
Disclosed are a polyol with a molecular weight distribution Mw/Mn of 4 or more, obtained by reacting a compound comprising an alkylene oxide compound (II) having a hydroxyl group in a base polyol (I) with a molecular weight of 2000 or more; and a polyol composition for a flexible polyurethane foam, comprising a polyol compound and a crosslinker, wherein the crosslinker comprises a polyol (a) with a hydroxyl value of 50 to 1100 mgKOH/g and with a primary hydroxylate ratio of 25% or more and 60% or less, which is obtained by an addition of a compound comprising alkylene oxide compound (ii) having a hydroxyl group to active hydrogen compound (i).
摘要:
The present invention provides a polyester polyol, preferably a plant-derived polyester polyol, suitable for a composition for polyurethane foam that contributes to the reduction of load on the environment and has a good balance of high resilience, moderate hardness, and high durability as a cushioning material for vehicle seat cushions. A polyester polyol having a hydroxyl value in the range of 15 to 100 mgKOH/g according to the present invention is produced by a condensation of raw materials comprising at least one selected from the group consisting of fatty acids having a hydroxy group and fatty acid esters having a hydroxy group with a polyhydric alcohol having an average number of functional groups of more than three but not more than eight. The raw materials contain 90% to 100% by mass of a fatty acid having a hydroxy group and a fatty acid ester having a hydroxy group in total.