Special foaming agent for hard PVC (polyvinyl chloride) low-foaming material and preparation method thereof

A foaming agent and low-foaming technology, which is used in the preparation of special foaming agents for rigid PVC low-foaming materials, can solve the problems of large cells, resin aging and unevenness of foam products, and achieve fine cells. Structure, foaming process control, easy effect of foaming process
CN103756191AInactive Publication Date: 2014-04-30WEIFANG YAXING GRP CO LTD
6 Cites 29 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WEIFANG YAXING GRP CO LTD
Publication Date
2014-04-30
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a special foaming agent for a hard PVC (polyvinyl chloride) low-foaming material and a preparation method thereof. The special foaming agent comprises the following materials in parts by weight: 20-80 parts of azodicarbonamide (ADC), 20-80 parts of auxiliary foaming agent, 1-20 parts of activating agent, 0.2-10 parts of dispersing agent and 0.2-5 parts of processing agent. The preparation method comprises the steps: adding the dispersing agent and the processing agent in a mixer, mixing for 3-7 minutes, and sequentially uniformly mixing the ADC, the auxiliary foaming agent and the activating agent in the mixer to prepare the special foaming agent. The special foaming agent is suitable for hard PVC low-foam materials such as PVC crushing and low-foaming sectional bars, tubular products and sheets, a wood-plastics low-foaming material and the like. The special foaming agent has the positive effects that 1, the decomposition temperature is 160-190 DEG C, and is within a processing temperature range of the hard PVC low-foaming material; 2, the foaming process is short in induction period, the decomposition is performed without mutation, and the foaming process is easily controlled; 3, the hard PVC low-foaming material is used on a hard PVC low-foaming product, and has a smooth surface and has no discoloring and ageing phenomena; and 4, the special foaming agent is low in cost and good in comprehensive performance, and accords with the use requirement.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a special-purpose foaming agent for rigid PVC low-foaming materials, in particular to a preparation method of a special-purpose foaming agent for rigid PVC low-foaming materials. Background technique

[0002] There are many criteria for selecting a suitable chemical blowing agent, obviously the most important being that the decomposition of the chemical blowing agent must occur within the processing temperature range of the polymer. As far as rigid PVC low-foaming materials are concerned, its processing temperature range is 160-190°C, while the decomposition temperature of the foaming agent azodicarbonamide ADC is 195-220°C, which is relatively high, so it is difficult to directly apply them to PVC. Applied in foam materials. Since the decomposition temperature of azodicarbonamide ADC does not match the processing temperature of PVC, when using azodicarbonamide ADC for this type of resin, the processing temperature must be inc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More