摘要:
A process for producing a rigid polyurethane foam by use of a decreased amount of a CFC blowing agent and an increased amount of water used as a blowing agent, maintaining a high degree of heat insulation and improving the deterioration in friability of the product. The catalyst is one of the imidazoles represented by the formula (I): ##STR1## where R.sup.1 is alkyl having 1 to 4 carbons, benzyl, dimethylaminopropyl, or hydroxyalkyl having 1 to 3 carbons; R.sup.2 is hydrogen, alkyl having 1 to 4 carbons, allyl, or benzyl; and R.sup.3 and R.sup.4 are independently hydrogen, methyl, or hydroxymethyl.
摘要:
An amine catalyst for producing polyurethane comprising a compound of formula (I): ##STR1## wherein n is an integer from 0 to 3, and R.sub.1, R.sub.2, and R.sub.3 are each independently a C.sub.1-3 alkyl group. The amine catalyst has a secondary hydroxyl group in the molecule and is non-bleeding in the polyurethane resin and excellent in moldability. A process for producing a polyurethane foam by reacting a polyol with a polyisocyanate in the presence of the amine catalyst defined above and a foaming agent are also disclosed.
摘要:
An amine catalyst for producing polyurethane comprising a compound of formula (I): ##STR1## wherein n is an integer from 0 to 3, and R.sub.1, R.sub.2, and R.sub.3 are each independently a C.sub.1-3 alkyl group. The amine catalyst has a secondary hydroxyl group in the molecule and is non-bleeding in the polyurethane resin and excellent in moldability. A process for producing a polyurethane foam by reacting a polyol with a polyisocyanate in the presence of the amine catalyst defined above and a foaming agent are also disclosed.
摘要:
A catalyst for polyurethane production is provided which is non-corrosive and exhibits effective delay of catalyst action. The catalyst comprises a mixture of a tertiary amine, and a saturated dicarboxylic acid represented by General Formula: HOOC—(CH2)n—COOHwhere n is an integer of from 2 to 14.
摘要:
To provide a foaming additive for producing a polyurethane foam, which is capable of solving a problem of deterioration of moldability due to deterioration of the initial foaming property of a foam, and a method for producing a rigid polyurethane foam by using it.A foaming additive for producing a polyurethane foam, is used which comprises a salt of carbon dioxide with an amine compound of one or more types selected from the group consisting of an amine compound (I) represented by the following formula (1): wherein each of R1 to R4 which are independent of one another, is a hydrogen atom or a methyl group, and n is a number of at least 1, an amine compound (II) represented by the following formula (2): wherein each of R1 to R4 which are independent of one another, is a hydrogen atom or a C1-3 alkyl group, R5 is a hydrogen atom, a C1-3 alkyl group, a C1-3 aminoalkyl group, a C2-4 N-methylaminoalkyl group or a C3-5 N,N-dimethylaminoalkyl group, or R5 may be optionally bonded to R1, R2, R3 or R4 to form a cyclic compound having a piperazine structure, provided that at least one of R1 to R5 is a hydrogen atom, and all of R1 to R5 are not hydrogen atoms, each of n and m which are independent of each other, is an integer of from 1 to 5, and a is an integer of from 1 to 6, an amine compound (III) represented by the following formula (3): wherein R1 is a C1-4 alkyl group, and each of R2 to R5 which are independent of one another, is a hydrogen atom or a methyl group, an amine compound (IV) represented by the following formula (4): wherein R1 is a C1-4 alkyl group, and each of R2 to R5 which are independent of one another, is a hydrogen atom or a methyl group, and an amine compound (V) represented by the following formula (5): wherein each of R2 to R5 which are independent of one another, is a hydrogen atom or a methyl group.
摘要:
A catalyst for polyurethane production is provided which is non-corrosive and exhibits effective delay of catalyst action. The catalyst comprises a mixture of a tertiary amine, and a saturated dicarboxylic acid represented by General Formula: HOOC—(CH2)n—COOH where n is an integer of from 2 to 14.
摘要:
A catalyst composition for the production of a polyurethane resin, which comprises an amine compound of the following formula (1): wherein each of R1 and R2 which are independent of each other, is a C1-4 alkyl group, such alkyl groups bonded to each other directly or via a nitrogen atom or an oxygen atom to form a ring structure, a dimethylaminopropyl group or a diethylaminopropyl group, and R3 is a C2-16 straight chain or branched chain alkylene group, and an amine compound of the following formula (2): wherein each of R4 and R5 which are independent of each other, is a C1-4 alkyl group, such alkyl groups bonded to each other directly or via a nitrogen atom or an oxygen atom to form a ring structure, a dimethylaminopropyl group or a diethylaminopropyl group, R6 is a C2-16 straight chain or branched chain alkylene group, R7 is a C2-3 straight chain or branched chain alkylene group, and n is an integer of from 0 to 2.
摘要:
A selecting apparatus is disclosed which includes a selecting unit for selecting an input source from a plurality of sources, a switching unit for switching content data in the input source selected by the selecting unit, an operating unit made up of a plurality of operating elements constituting the single integral operating unit, and a controlling unit for controlling the switching unit to switch the content data if a predetermined operating element among the operating elements constituting the operating unit is operated, the controlling element further controlling the selecting unit to execute the input source selection if another predetermined operating element among the constituting elements is operated.
摘要:
A recording apparatus is disclosed which includes first through n-th recording means for recording input broadcast contents to a recording medium. When a user designates a reservation of a broadcast content recording, the apparatus automatically selects one of the recording means so as to make the recording reservation to the selected recording means. If any such recording means cannot be selected automatically, i.e., if recording reservations have already been made to all recording means for a time slot corresponding to the reservation desired to be made anew, then the user is asked to select particular recording means for the reservation. A recording reservation made to one recording means may be switched automatically to another recording means as needed. That is, any recording reservation after being made may be switched from one recording means to another before actual execution of the recording, in order to reflect the status of other recording reservations that have been made since. These arrangements enhance the user's ease of operation and help to build an advantageous setup for recording reservation management.
摘要:
The present invention provides a recording/reproducing apparatus capable of realizing proper recorded-content management on a large-capacity storage device. The content data recorded on the recording medium is managed with the content age computed by a lapse time from its recording date-and-time and a genre, and automatically deleted with priority of higher content age. Meanwhile, the user is allowed to instruct delete-prohibition management on a content not desired for automatic deletion. The content data placed under delete-prohibition management is excluded from a subject of automatic deletion. Meanwhile, concerning the delete-prohibition management, an upper limit value is provided. By disabling to unnecessarily placing a great deal of content data under delete-prohibition management, secured is a recording domain during automatic picture-recording or so.