[미국특허]
Process for preparing particle board and polyisocyanate-phosphorus compound release agent composition therefor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29J-005/02
C08G-018/28
C08L-001/02
출원번호
US-0134315
(1980-03-26)
발명자
/ 주소
McLaughlin Alexander (Meriden CT) Richter Reinhard H. (North Haven CT) Reymore
Jr. Harold E. (Richmond VA)
출원인 / 주소
The Upjohn Company (Kalamazoo MI 02)
인용정보
피인용 횟수 :
32인용 특허 :
4
초록▼
The use of polyisocyanates as binders in the preparation of particle boards is subject to the drawback that the boards exhibit a tendency to adhere to the face of the platens used in their formation. This problem is minimized by incorporating minor amounts of a mixture of certain mono- and di- (satu
The use of polyisocyanates as binders in the preparation of particle boards is subject to the drawback that the boards exhibit a tendency to adhere to the face of the platens used in their formation. This problem is minimized by incorporating minor amounts of a mixture of certain mono- and di- (saturated or unsaturated aliphatic) acid phosphates or the corresponding pyrophosphates, into the polyisocyanate to be used as binder. The polyisocyanates and the acid phosphates and or pyrophosphates, are applied to the particles separately, or after preblending one with the other. Whether the components are applied separately or in combination one with the other, they can each be applied either neat or in the form of an emulsion or emulsions.
대표청구항▼
In a process for the preparation of particle board wherein particles of organic material capable of being compacted are contacted with a polyisocyanate composition and the treated particles are subsequently formed into boards by the application of heat and pressure, the improvement which comprises c
In a process for the preparation of particle board wherein particles of organic material capable of being compacted are contacted with a polyisocyanate composition and the treated particles are subsequently formed into boards by the application of heat and pressure, the improvement which comprises contacting said particles, in addition to the treatment with said polyisocyanate composition, with from about 0.1 to about 20 parts, per 100 parts by weight of said polyisocyanate, of a phosphate selected from the class consisting of (a) acid phosphates of the formulae [Figure] and the ammonium, alkali metal, alkaline earth metal and amine salts thereof; (b) pyrophosphates represented by those derived from the acid phosphates (I) and (II) and mixtures of (I) and (II); (c) The O-monoacyl derivatives of the acid phosphates (I) and (II) having the formulae [Figure] (d) carbamoyl phosphates having the formula [Figure] and the ammonium, alkali metal, alkaline earth metal and amine salts of the compounds of formula (VII); (e) branched polyphosphates of the formulae [Figure] (f) polyphosphates corresponding to the general formula [Figure] (X) including the cyclometaphosphates (n=3); and (g) mixtures of two or more of said compounds; wherein, in the various formulae shown above, each R is independently selected from the class consisting of alkyl having at least 3 carbon atoms, alkenyl having at least 3 carbon atoms, aryl, aryl substituted by at least one alkyl, alkyl substituted by from 1 to 2 acyloxy groups wherein the acyl group is the residue of an aliphatic monocarboxylic acid having at least 2 carbon atoms, and [Figure] wherein R′is selected from the class consisting of alkyl, aryl and aryl substituted by at least one alkyl, one of A and B represents hydrogen and the other is selected from the class consisting of hydrogen, methyl, chloromethyl and 2,2,2-trichloroethyl, and m is a number having an average value from 1 to 25; provided that when one of the R\s in Formulae (II), (VI), (VIII) an (IX) is alkyl having at least 3 carbon atoms, the other R can also be selected from methyl and ethyl; and further provided that, in Formula (II), the two RX groups taken together with the P atom to which they are attached can additionally form the residue of a heterocyclic nucleus having from 5 to 6 ring atoms; R1 is hydrocarbyl; R2 is selected from the class consisting of hydrocarbyl and hydrocarbyl substituted by at least one additional [Figure] group wherein R has the significance defined above; n is an integer; and X in each instance is a chalcogen selected from oxygen and sulfur. A storage stable composition comprising a mixture of: (a) a polymethylene polyphenol polyisocyanate containing from about 25 to about 90 percent by weight of methylenebis(phenyl isocyanate) the remainder of said mixture being oligomeric polymethylene polyphenol polyisocyanates having a functionality higher than 2.0; and (b) from about 0.1 parts by weight to about 20 parts by weight, per 100 parts by weight of said polyisocyanate, of a pyrophosphate derived by removal of water of condensation from at least one acid phosphate selected from acid phosphates of the formulae: [Figure] wherein each R is independently selected from the class consisting of alkyl having at least 3 carbon atoms, alkeyl having at least 3 carbon atoms, aryl, aryl substituted by at least one alkyl, alkyl substituted by from 1 to 2 acyloxy groups wherein the acyl group is the residue of an aliphatic monocarboxylic acid having at least 2 carbon atoms, and [Figure] wherein R′is selected from the class consisting of alkyl, aryl and aryl substituted by at least one alkyl, one of A and B represents hydrogen and the other is selected from the class consisting of hydrogen, methyl, chloromethyl and 2,2, 2-trichloroethyl, and m is a number having an average value from 1 to 25, and mixtures of two or more of said acid phosphates; provided that, when one of the R groups in the formula [Figure] is alkyl having at least 3 carbon atoms, the other R can also be selected from methyl and ethyl, and further provided that the two RO groups in said formula, taken together with the P atom to which they are attached, can additionally form the residue of a heterocyclic nucleus having from 5 to 6 ring atoms.
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