中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.02 seconds)

    Process for preparing granular powdered polyamide
    1.
    发明授权
    Process for preparing granular powdered polyamide 失效
    颗粒粉末聚酰胺的制备方法

    公开(公告)号：US3909498A

    公开(公告)日：1975-09-30

    申请号：US37893873

    申请日：1973-07-13

    Applicant: STAMICARBON

    Inventor： WOLVERS WILHELMUS P ,  WARNIER JEAN M M

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/18

    CPC classification number: C08G69/18

    Abstract: A process for the preparation of polyamides in granular or powdered form is described, said process comprising heating a lactam or mixture of lactams in a suitable inert solvent at a temperature below the melting point of the polyamide to be formed, in the presence of a conventional anionic catalyst and a conventional promotor. The disclosure points out that the presence during polymerisation of one or more compounds from the group of alcohols, carboxylic esters and inert salts, dissolved or dispersed in the solvent, prevents the formation of lumps and the adhesion of the polyamide to the reactor walls.

    Abstract translation: 描述了制备颗粒状或粉末状聚酰胺的方法，所述方法包括在常规的聚酰胺的存在下，在低于待形成的聚酰胺的熔点的温度下，在合适的惰性溶剂中加热内酰胺或内酰胺的混合物 阴离子催化剂和常规的促进剂。 本公开指出，溶解或分散在溶剂中的一种或多种来自醇，羧酸酯和惰性盐的化合物聚合期间的存在防止了团块的形成和聚酰胺粘附到反应器壁上。

    Process for the preparation of granular or powdery polyamide
    2.
    发明授权
    Process for the preparation of granular or powdery polyamide 失效
    颗粒状或粉状聚酰胺的制备方法

    公开(公告)号：US3910861A

    公开(公告)日：1975-10-07

    申请号：US39323073

    申请日：1973-08-30

    Applicant: STAMICARBON

    Inventor： WOLVERS WILHELMUS P ,  FRANSSEN PIERRE J ,  WARNIER JEAN M M

    IPC: C08G69/20 ,  C08J3/12 ,  C08G69/18

    CPC classification number: C08J3/12 ,  C08G69/20 ,  C08J2377/02

    Abstract: A one step process for the preparation of granular or powdery polyamides having a novel combination of high specific density and relative viscosity, along with narrow particle size distribution and low water extractable content, but with a wide molecular weight distribution, is described wherein the polymerization process is carried out in an inert solvent, in which the lactam monomers are substantially soluble but polyamide product is substantially insoluble, and at a temperature below the melting point of the polyamide to be formed, and wherein the essential promoter employed is bis- Epsilon -caprolactimether.

    Abstract translation: 描述了制备具有高比密度和相对粘度的新型组合以及窄的粒度分布和低的可提水含量但具有宽的分子量分布的颗粒或粉末状聚酰胺的一步法，其中聚合过程 在惰性溶剂中进行，其中内酰胺单体基本可溶，但是聚酰胺产物基本上不溶，并且在低于要形成的聚酰胺的熔点的温度下进行，并且其中使用的必需促进剂是双ε-己内酰胺醚 。

    METHOD OF PRODUCTION OF GRANULATED OR POWDERED POLYAMIDES
    3.
    发明专利
    METHOD OF PRODUCTION OF GRANULATED OR POWDERED POLYAMIDES 未知

    公开(公告)号：CS178891B2

    公开(公告)日：1977-10-31

    申请号：CS506273

    申请日：1973-07-13

    Applicant: STAMICARBON

    Inventor： WOLVERS WILHELMUS P ,  WARNIER JEAN M

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/18

    Abstract: A process for the preparation of polyamides in granular or powdered form is described, said process comprising heating a lactam or mixture of lactams in a suitable inert solvent at a temperature below the melting point of the polyamide to be formed, in the presence of a conventional anionic catalyst and a conventional promotor. The disclosure points out that the presence during polymerisation of one or more compounds from the group of alcohols, carboxylic esters and inert salts, dissolved or dispersed in the solvent, prevents the formation of lumps and the adhesion of the polyamide to the reactor walls.

    PROCESS FOR PREPARING PURIFIED, VIRTUALLY ODOURLESS SOLID BENZOIC ACID
    5.
    发明专利
    PROCESS FOR PREPARING PURIFIED, VIRTUALLY ODOURLESS SOLID BENZOIC ACID 未知

    公开(公告)号：CA1268477A

    公开(公告)日：1990-05-01

    申请号：CA499296

    申请日：1986-01-09

    Applicant: STAMICARBON

    Inventor： MUTSERS STANISLAUS M P ,  WILLEMS MICHAEL H ,  WOLVERS WILHELMUS P

    IPC: C07C63/06 ,  C07C51/00 ,  C07C51/265 ,  C07C51/42 ,  C07C51/43 ,  C07C51/487 ,  C07C67/00

    Abstract: The invention relates to a process for preparing purified, virtually odourless, solid benzoic acid obtained from toluene by oxidation with a gas containing molecular oxygen, by means of a treatment using an inert gas or gas mixture, wherein the benzoic acid to be purified is supplied in a liquid state to a fluid or spouted bed granulator in which the prevailing temperature is below the solidification temperature of the benzoic acid and in which the benzoic acid is treated, during and possibly after the granulating process, with the said gas or gas mixture, the impurities present being taken up in whole or in part in the gas or gas mixture, upon which the benzoic acid thus purified is removed from the fluid or spouted bed device. By the above process, granulation and extraction may be combined, impurities already removed during granulation, permitting recovery of a substantially odourless benzoic acid.

    PROCESS FOR PREPARING GRANULAR OR POWDERED POLYAMIDE
    6.
    发明专利
    PROCESS FOR PREPARING GRANULAR OR POWDERED POLYAMIDE 未知

    公开(公告)号：CA1002686A

    公开(公告)日：1976-12-28

    申请号：CA176195

    申请日：1973-07-11

    Applicant: STAMICARBON

    Inventor： WOLVERS WILHELMUS P ,  WARNIER JEAN M M

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/18

    Abstract: A process for the preparation of polyamides in granular or powdered form is described, said process comprising heating a lactam or mixture of lactams in a suitable inert solvent at a temperature below the melting point of the polyamide to be formed, in the presence of a conventional anionic catalyst and a conventional promotor. The disclosure points out that the presence during polymerisation of one or more compounds from the group of alcohols, carboxylic esters and inert salts, dissolved or dispersed in the solvent, prevents the formation of lumps and the adhesion of the polyamide to the reactor walls.

Patent Agency Ranking