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Tubular reactor ethylene/alkyl acrylate copolymer as polymeric modifiers for asphalt

A technology of alkyl acrylate and tubular reactor, which is applied in the direction of building structure, building components, building insulation materials, etc., and can solve the problems of plastic body fatigue resistance, creep resistance, cold resistance and cracking resistance, etc.

Active Publication Date: 2006-07-05
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is generally believed that plastomers are not as good as elastomers, because plastomers do not significantly improve fatigue resistance, creep resistance, cold cracking resistance, etc.

Method used

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  • Tubular reactor ethylene/alkyl acrylate copolymer as polymeric modifiers for asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0048] A series of 6 polymer-modified bitumen was prepared as previously described. The first trial was a PMA paving application using a control of a technical grade epoxy-functionalized ethylene copolymer (EnBAGMA with a conventional concentration (1.5 wt%) of polymer additive). The second and the third test adopt the ethylene / methyl acrylate copolymer (25% by weight MA) produced by the tubular reactor of the present invention, which is characterized by a melt index of 0.7, mixed with two different pitches respectively, the polymer The additive concentration is 4% by weight. The last three runs used ethylene vinyl acetate copolymer (33% by weight VA) and two comparative autoclaved ethylene / methyl acrylates. A detailed description of these experiments and the data obtained are given in Table 1 below. These data show that the tubular reactor produced EMA behaves like the reactive EnBAGMA polymer additive and outperforms autoclave produced EMA or EVA polymers.

[0049] ...

Embodiment 3-22

[0056] Following a method similar to Examples 1 and 2, the ethylene / alkyl acrylate copolymer and the epoxy-functionalized ethylene / alkyl acrylate / glycidyl methacrylate terpolymer prepared using a tubular reactor Mixture A series of 20 additional polymer-modified bitumen was prepared. The first 8 trials had no subsequent addition of acid. The remaining 12 polymer-modified asphalts were treated with two different acid concentrations of superphosphoric acid (equivalent to 105% H 3 PO 4 )deal with. Use 3 different commercial asphalts. A detailed description of these experiments and the data obtained are given in Table 2 below. These data show that when tubular reactor-made EMA copolymers are used as polymer additives in combination with reactive EnBAGMA, both stiffness and elasticity are enhanced at reduced total polymer loading.

[0057] SPA(1)

%weight

base asphalt

Phase angle

test limit

PG rating

elastic back

complex

...

Embodiment 23-25

[0068] Three additional polymer-modified bitumens were prepared using tubular reactor made blends of EMA and EnBAGMA following a procedure similar to the previous examples. In each test, 2.5% by weight of tubular reactor EMA and 1.0% by weight of EnBAGMA were added to the same bitumen, and the elastic recovery and phase angle were measured after aging of the PMA bitumen. The obtained data are shown in Table 3.

[0069] 2.5% by weight

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Abstract

Polymeric modified asphalt for road paving applications wherein the polymer modifier is a tubular reactor produced ethylene / alkyl acrylate copolymer (e.g., EMA) optionally blended with an epoxy functionalized ethylene copolymer (e.g., EnBAGMA) and added to the asphalt with or without the use of an acid adjuvant (e.g., PSA).

Description

technical field [0001] The present invention relates to a polymer modified asphalt composition. More specifically, but not limited thereto, the present invention relates to ethylene / alkyl acrylate copolymers prepared by tubular reactions, preferably in combination with epoxy-functionalized ethylene / alkyl acrylates, as polymer modifications of bitumen use of the agent. technical background [0002] A well known and accepted industrial method of modifying bitumen for paving is the addition of various polymers in the art. Polymer additives are generally used to improve the rutting resistance, fatigue resistance and cracking resistance of asphalt, and sometimes are used to improve the stripping property from the aggregate. These improvements are mainly due to or related to the addition of polymers to increase the elasticity and stiffness of the bitumen. A set of SHRP (Strategic Highway Research Program) specifications are used to classify the performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L33/00C08L33/04
CPCC08L95/00C08L33/04C08L2666/04
Inventor G·W·普雷简
Owner DOW GLOBAL TECH LLC